Maruyama MS755 - Pump

MS755 - Pump Maruyama - Free user manual and instructions

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USER MANUAL MS755 Maruyama

natural_image Technical line drawing of a mechanical pump assembly (no text or symbols)

Instruction Manual Manual de instrucciones Mode d'emploi

Thank you very much for buying this product.

This instruction manual describes how to use and maintain this product correctly.

Before getting started, please read this instruction manual carefully for a full understanding of the product.

Utilize this manual so that this product can function at its best performance longer.

After you read this manual, be sure to keep it at hand to carefully to check for any matter that you do not understand. Please note that the product may be partially different from the contents of the manual because we are always trying to offer better products.

If you have please contact your MARUYAMA Service dealer.

  • Keep the instruction manual at hand.
  • If you lose this manual, please obtain a replacement from MARUYAMA Service dealer.
  • Do not modify this product, because doing so may create unsafe conditions which may be harmful or dangerous.

Purpose of use

This product is intended for the application of properly mixed agricultural and pest control chemicals. Please note that we are not liable for any accident caused by the use deviating from the range of the use purpose or any accident resulting from modification or disassembly without permission.

Precautions

This manual denotes handling precautions that are critical as described below.

Maruyama MS755 - Precautions - 1

DANGER

Personal death or serious injury will result if the warning is not followed.

Maruyama MS755 - DANGER - 1

WARNING

Personal death or serious injury may result if the warning is not followed.

Maruyama MS755 - WARNING - 1

CAUTION

Personal injury may result if the warning is not followed.

CAUTION

Machine damages may result if the warning is not followed.

When letting another person run this product

Tell him/her how to run this product in advance and explain each warning label with [!] (Safety precaution mark) attached to the machine. To avoid any misunderstanding, tell him/her to read the instruction manual and precautions on safe work carefully and learn the handling method while checking the machine before getting started.

Particularly, explain the prohibited matters in detail.

As if you were using it!
Maruyama MS755 - When letting another person run this product - 1

natural_image Two workers in uniform exchanging a large object, with grass falling below (no text or symbols)

1. For Safe Operation 2

Precautions Before Getting Started 2

Precautions on Use (Chemical) 4

(Preparation for Operation) 5

(During Operation) 6

Precautions on Setup....7

Precautions on Setup/Post-use Precautions 9

2. Part Names and Operating Parts 10

Part Names....10

Checking Standard Accessories, Functions of Standard Accessories and

Operating Parts, and Warning Labels ⚠⋯11

3. How to Handle and Operate ....12

Preparation and Check – Spraying....12

Preparation and Check – Spraying – Stop 13

4. Cleaning, Maintenance, and Storage 15

Cleaning, Maintenance, and Storage 16

Troubleshooting and Actions for Power Sprayer 17

5. Servicing 19

After-sales Servicing 19

Changing the Direction of the Bypass Port 19

Machine Modification 19

6. Specifications 20

Table of Specifications 20

1. For Safe Operation

Precautions Before Getting Started

Before getting started, be sure to check and read the precautions on labels attached to the machine to learn the safe and correct handling method.

Precautions on Safety

Described here are just some examples. Do not forget that the operation is always accompanied by danger, to avoid any potential injury or harm.

These people are prohibited from spraying:

• People who are unable to perform normal operation due to fatigue, illness, effects of drugs, etc.
• People under the influence of alcohol
- Pregnant women
• Injured people and those who are easily affected by agrichemicals
• Young people (below 15 of age)
• People not familiar with the proper use of this product

Wear the clothes suitable for operation.

The operator must wear the clothes fitting his/her body.

Maruyama MS755 - Wear the clothes suitable for operation. - 1

text_image Cap Protection eyeglasses Respirator or mask as required by chemical label Ear plugs (for noisy operation) Protection clothes (tight lower sleeve cuff) Protective gloves Work boots L-003

WARNING

Check, maintain, all safety equipment so that they will function as intended.

Just In Case

Handling of Agrichemicals

WARNING

Consult the chemical manufacturer's label and MSDS for all required safety equipment, application instructions, first aid instructions and other precautions and safety warnings. Follow all chemical manufacturer's label and MSDS instruction. If you have any questions, contact the chemical manufacturer for advise prior to use of chemicals.

If you do not know the first-aid action!

Maruyama MS755 - WARNING - 1

natural_image Illustration of two individuals performing CPR on a patient lying on the ground, with a first aid kit nearby (no text or symbols)

Check the method of emergency call.

Handling of Chemical

WARNING

(1) Read the instruction manual of the chemicals carefully. Read the labels for the chemicals and fertilizer to be used carefully to become familiar with how to use them and precautions on use.

(2) Wear the clothes that prevent exposure to the conditioner.

(3) Prepare the necessary volume of conditioner.

(4) Prepare and place the conditioner at the spraying location. Check the direction of wind and spray at the location so environmental contamination will not occur.

(5) Do not prepare on the machine or in the tank in advance of transportation. The spilt conditioner may result in environmental contamination.

(6) Do not store or transport the conditioner along with any drink or food. When transporting, be careful not to break the container.

(7) Make a spraying plan. Prepare the conditioner not to leave any remainder.

(8) Put the remaining conditioner in a fully closed container or bag that lets anyone identify the content. Isolate from any other materials and store the container or bag so that any unauthorized person cannot take it. Never store the conditioner in a container for drinks or food.

(9) Dispose the empty bag, can, and bottle according to the instruction manual of the conditioner or to the instruction by the local government.

DANGER

- Do not hold the spraying hose. You may be exposed to agrichemicals. Because of the loose nozzle head.

WARNING

- Do not use any highly combustible agrichemical because fire or combustion may occur.

CAUTION

- If the volume sprayed per unit area or the type of conditioner is incorrect, hazardous spills may be caused.

- Do not leave the conditioner in the conditioner tank for a long time because this may affect the machine.

Perform the operation in a timely manner.

(1) Check the direction of wind and the situation surrounding the field. If wind is strong, the conditioner may drift into undesired areas. Therefore, please avoid the operation.

(2) Avoid the high-temperature times of day.

(3) Do not perform the operation if you are tired or sick.

(4) Do not enter the field immediately after spraying.

Be sure to read the manual!
Maruyama MS755 - Perform the operation in a timely manner. - 1

text_image Prohibited

1-008

Wear proper clothes.
Maruyama MS755 - Perform the operation in a timely manner. - 2

text_image Prohibited

1-009

Do not put the chemical(s) together with food.
Maruyama MS755 - Perform the operation in a timely manner. - 3

natural_image Cartoon illustration of a person pushing a wheelbarrow loaded with vegetables and grass (no text or symbols)

Prohibited
Maruyama MS755 - Perform the operation in a timely manner. - 4

1-010
Separate and store the chemical(s) in good order.
Maruyama MS755 - Perform the operation in a timely manner. - 5

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Prohibited
Maruyama MS755 - Perform the operation in a timely manner. - 6

1-011
Check the direction of wind and surrounding area.
Maruyama MS755 - Perform the operation in a timely manner. - 7

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1-020

Do not enter immediately after spraying.
Maruyama MS755 - Perform the operation in a timely manner. - 8

natural_image Illustration of a person standing in a farm with irrigation equipment and a water pump (no text or symbols)

1-021

Precautions on Use (Inspection, Maintenance and transportation)

(1) When transporting sprayer on a truck, take the proper action so that the machine will not fall.
(2) When loading/unloading a heavy material, do not take an unreasonable stance nor perform one-man operation.
(3) Refill the fuel after the engine cools down. Do not smoke while refueling. Avoid static discharge when refueling. Tighten the lid on the fuel tank snualy. Remove any spilled fuel completely.
(4) Check for loosened bolts/nuts on each part and slipped-away or damaged setting pins.
(5) After covers for rotary parts, etc. are removed for maintenance, etc., re-attach all of them correctly.
(6) Do not start the engine near combustible materials or at a poorly ventilated or narrow location. Do not operate indoors.
(7) For electrical wiring, oils, water, and fire are strictly prohibited.

Fire prohibited
Maruyama MS755 - Precautions on Use (Inspection, Maintenance and transportation) - 1

text_image Prohibited GAS 1-012

Attach the safety cover accurately!
Maruyama MS755 - Precautions on Use (Inspection, Maintenance and transportation) - 2

text_image Prohibited 1-013

Be careful of ventilation and combustibles!
Maruyama MS755 - Precautions on Use (Inspection, Maintenance and transportation) - 3

text_image Prohibited 1-014

Points in Operation

(1) Avoid fatigue by taking proper breaks.
(2) Always keep in mind that the working machine containing the conditioner is a heavy material.
(3) Pay attention to the clothes, field conditions, and direction of wind to avoid exposure to agrichemicals and environmental contamination. The direction in which agrichemicals flow may be dangerous.
(4) For cooperative operation, define and check accurate signs among all members.
(5) Refuel without letting fuel spill out after the engine is stopped and cooled down.
(6) During operation, do not allow any unauthorized person to come into the work area being sprayed.
(7) Depending of the agent to be sprayed, static electricity can be avoided by using a ball chain (optional).
(8) Check the packing and tighten the lid on the chemical tank so that the chemical will not come out.
(9) Do not direct the spray nozzle toward any person.
(10) Before any break, rinse your mouth out and wash your hands and face with soap and water.
(11) If you feel ill while or during spraying, treatment by a medical doctor is immediately needed. Seek medical attention immediately.

Have a rest properly.
Maruyama MS755 - Points in Operation - 1

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Unreasonable work prohibited!

Maruyama MS755 - Points in Operation - 2

text_image Prohibited 1-016

Pay attention to the field and environment!

Maruyama MS755 - Points in Operation - 3

text_image Up wind Prohibited 1-017

Determine signs for cooperative work!
Maruyama MS755 - Points in Operation - 4

text_image Prohibited 1-018

Maruyama MS755 - Points in Operation - 5

natural_image Illustration of two workers operating machinery in a field, no text or symbols present

Points in Handling This Machine

Applications

○Spraying chemicals for crops from the fields of rice, crops from general vegetable fields, fruit trees, mulberry, and trees
○Spraying pesticide solutions or insecticides for cattle houses, chicken houses, and city sanitation
○Spraying liquid herbicides ○Spraying water to crops from general vegetable fields or fields of rice
○Washing cattle houses, chicken houses, agricultural crops, and agricultural instruments
○Washing wall surfaces, etc. of building structures and protecting electric feeder lines from salt damages

Maruyama MS755 - Applications - 1

CAUTION

Do not use strong acid, strong alkali, chemical solvents, or hot water. This may cause damage to your sprayer or spray pump.

Maruyama MS755 - CAUTION - 1

WARNING

  • When setting up this product with a motor, please contact your MARUYAMA service dealer.
  • When driving this product using a V pulley or V belt, be sure to attach a cover over the rotary part so that it cannot be easily touched during check.(Keep the cover being attached for operation and check. If the cover cannot be installed, special considerations are required e.g. be sure to provide a fence around the working machine.)
  • Be sure to "stop" this machine before check or adjustment.

Maruyama MS755 - WARNING - 1

CAUTION

  • Choose pulleys and engine speeds within the ranges of the specified rotating speed, pressure, and water volume.
    If these ranges are exceeded during use, damages of the power sprayer or accidents may be caused.
  • The rated output of the motor must be at or above the specified power of the power sprayer. Otherwise, its performance be less than advertised.
  • Be sure to set up in such a way that the oil gauge on the power sprayer can be easily checked.

CAUTION

- To fasten this machine use bolts with proper sizes and strength. Install the machine securely. If installation of the power sprayer or motor is unstable, vibration may occur and the power sprayer may be adversely affected.

- Select the proper-size V pulley or V belt complying with the specified power.

- Use the size of the V pulley shaft hole or key groove matching the shaft.

Do not use any shaky V pulley hole or key groove because accidents may be caused by detrimental vibration,

- The shaft end must slightly retract from the pulley surface. Tighten the bolt accurately via the washer. Use the V pulley set screw as necessary.

- Install the V pulley of the motor and the V pulley of the power sprayer on a straight line. If the V belt is not set straight when viewed down, an unreasonable force is applied and the V belt may be damaged or slip away.

- The V belt must not be too tight or too loose. If it is too tight, the engine or pump bearings may be damaged. If it is too loose, belt damages or slip-away may be caused.

- When using two or more V belts, use the same type and size.

- When replacing V belts, replace all at the same time.

Piping

Maruyama MS755 - Piping - 1

DANGER

  • Use the same pipe type and size for the hose and nozzle to be connected. When connecting, be sure to check the packings and connect accurately.
    If the pipe size or type is inadequate, the packing is lost or damaged, or the threads is loose, you may be exposed to the chemical. Also, you may be exposed to the chemical because the packing comes out or is damaged if the fittings are over-tightened. Tighten the screw adequately.
  • Before preparing the conditioner, be sure to check for leaks with fresh water.

(Water intake)

- The standard suction tube diameter is the diameter of the pump suction port. If the suction hose has elbows or valves, etc., use one-pipe size larger suction tube diameter.

CAUTION

If the suction tube diameter is smaller than required, performance degradation or failures may be caused.

- Suction pump head must be 3 meters or less.

(Spraying)

- Select spraying hose rated at or above the pump pressure.

(Hose)

  • Put the suction hose and bypass hose in the tank accurately and fasten them with clamps, etc. securely.
  • When connecting the hose, be sure to check any seals and threads for tightness.

Maruyama MS755 - (Hose) - 1

WARNING

Connect the bypass hose only to the bypass port. If the bypass port is fully closed by connecting a valve, the machine may be damaged and personal injury may occur. Therefore, never connect a valve to the bypass port or hose.

(Nozzle)

- Select a nozzle that flows approximately 30% of the bypass volume.

Maruyama MS755 - (Nozzle) - 1

DANGER

- If proper nozzles (proper to performance of the pump), the standard fittings are removed, or the nozzle is handled unreasonably, the original performance cannot be exercised and troubles or, depending on the case, personal injury or damages may be caused.

CAUTION

- Do not point the nozzle toward people because exposure to the chemical may occur.

Points on Engine Operation

Maruyama MS755 - Points on Engine Operation - 1

DANGER

  • The fuel is combustible. Do not put fire close to the operating location.
  • Be sure to stop and cool down the engine before fuel refilling. Wipe off the spilt fuel completely.
  • When refilling fuel or performing maintenance, do not smoke or put lit items close to the machine.
  • After this machine is refilled with fuel, separate the gas can used to refueling at least 3 meters then start the engine.
  • Do not refill the fuel exceeding the standard volume, give strong vibration, nor tilt the machine.

Maruyama MS755 - DANGER - 1

WARNING

- The exhaust gas from the engine is harmful. Do not run the engine indoors because carbon monoxide poisoning may occur. Be careful not to inhale the engines exhaust gas.

Maruyama MS755 - WARNING - 1

CAUTION

  • The engine is hot while it is running and immediately after it is stopped. Burn may occur if the muffler or cylinder fin is touched.
  • A high voltage is delivered to the spark plug while the engine is running. Never touch the spark plug and plug cord because it is dangerous.

CAUTION

Strictly follow the above instructions and read the instruction manual of the engine carefully. Refer to any additional requirements described by your engine manufacturer.

Post-use Precautions

(1) Spray the applicable chemical or fertilizer so that it will not remain in the conditioner tank.
(2) Remove the conditioner from the machine completely. Rust generation or failures may occur.
(3) Remove the fuel before long term storage.
(4) Rinse your mouth out and wash your body immediately after spraying chemicals.
(5) Fully clean the protectors used for the operation and wash spraying chemicals.
(6) If any part is damaged, repair it before storage. In this case, use the genuine parts designated by MARUYAMA for parts and consumables.
(7) Store the machine at a dry location avoiding dust adhesion.

Clean after work!
Maruyama MS755 - Post-use Precautions - 1

natural_image Illustration showing a person washing a faucet while another person swings in shower (no text or symbols)

1-019

2. Part Names and Operating Parts

Part Names

Part Names
Maruyama MS755 - Part Names - 1

text_image (2) Warning label (3) Pushrod oil port (1) Oil fill port lid V pulley Crankcase Oil gauge Mounting rail (8) label Suction port Air chamber (4) Regulator knob (5) Discharge ball valve (valve) (6) Plug Cylinder pipe (7) Drain plug Bypass port

Checking Standard Accessories

After the package is opened, make sure that all accessories are provided first. If any accessory is missing or broken, please contact MARUYAMA service dealer immediately. Sizes and quantities of accessories are listed in the Table of Specifications on Page 20.

Standard Accessories

Maruyama MS755 - Standard Accessories - 1

natural_image Simple line drawing of an open book with a grid on the front page (no text or symbols)

Instruction manual

Maruyama MS755 - Standard Accessories - 2

Maruyama MS755 - Standard Accessories - 3

Maruyama MS755 - Standard Accessories - 4

text_image Water intake strainer Suction hose Bypass hose

Maruyama MS755 - Standard Accessories - 5

natural_image Illustration of a curved, segmented object labeled 'Band' (no other text or symbols)

Product Features

  • Since the chemical solution always flows in one direction, the water intake mechanism is a reasonable one.
  • The cylinder is durable because it is treated with the MAC process (ceramic).
  • The piston packing uses a special rubber and it is resistant to chemicals.

Functions of Operating Parts/Warning Label

(1) Oil refill port lid:

Before starting operation, open this lid and be sure to refill the gasoline engine oil (SAE 10W-30 or equivalent).

(2) Warning label

• Always remove dirt and must so that contents will be clearly legible.
- If the warning label is damaged, replace is with a new one.
- If the part with a warning label is replaced, be sure to attach the label to the same position on the new label.

(3) Pushrod oil port:

Before starting, refill about 3 to 5 drops of oil (SAE 10W-30 or equivalent).

(4) Regulator knob:

Dial for pressure adjustment.

  • Turning clockwise increases the pressure.
  • Turning counterclockwise decreases the pressure.

(5) Discharge ball valve:

Used to connect the spraying hose. If the lever on the valve is turned by 90 degrees, the valve is "opened".

(6) Plug:

Remove this plug to use to supply water.

(7) Drain plug:

Loosen this plug to drain water. Water in the pump can be removed.

(8) Label:

Indicates the serial number.

3. How to Handle and Operate

Preparation and Check – Spraying

Maruyama MS755 - Preparation and Check – Spraying - 1

natural_image Mechanical assembly diagram showing a tool interacting with a motor and a circular cross-section (no text or symbols)

Maruyama MS755 - Preparation and Check – Spraying - 2

natural_image Technical line drawing of a mechanical assembly with pulleys and a shaft (no text or symbols)

Maruyama MS755 - Preparation and Check – Spraying - 3

text_image Bypass hose Suction hose

Maruyama MS755 - Preparation and Check – Spraying - 4

text_image Suction hose Strainer

CAUTION

This power sprayer does not contain oil. Before use, be sure to supply oil.

- Fill with the oil (SAE 10W-30 or equivalent) to the red circle on the center of the pump rear oil gauge or to the red circle on the center of the pump side oil gauge.

- Refill about 3 to 5 drops of oil (SAE 10W-30 or equivalent) to three holes (oil refill port) on the front of the crankcase.

Maruyama MS755 - This power sprayer does not contain oil. Before use, be sure to supply oil. - 1

CAUTION

Before attaching the suction hose and bypass hose, check the packing. Particularly for the suction hose, vibration and insufficient water intake on this machine may be caused, resulting in the reduced pump life.

- Attach the strainer as a standard accessory. (If a non-standard part is being used, please contact MARUYAMA service dealer.)

Maruyama MS755 - CAUTION - 1

natural_image Illustration of a bucket being inserted into a container with a hose, showing fluid flow direction (no text or symbols)

- When starting, perform test run with fresh water to make sure that the power sprayer is not faulty.

Maruyama MS755 - CAUTION - 2

CAUTION

If the power sprayer is faulty, stop it immediately. See Troubleshooting and Actions for Power Sprayer on Pages 18 and 19.

Maruyama MS755 - CAUTION - 1

text_image Extra water Water intake Chemical solution

- When putting the hose in the chemical tank, set the water intake pump head within 3 meters.

Maruyama MS755 - CAUTION - 2

CAUTION

Moving of the water intake hose and extra water hose is dangerous, so fasten them with the attached band securely.

• Make sure that the strainer is securely in the water source.

- As shown in the figure, move the pressure control valve handle up to the "Start" position.

Maruyama MS755 - CAUTION - 1

text_image Start 始動 START Handle

- Align the "0" scale on the grip with the pressure indicator position.

CAUTION

Note that starting in the pressurized state may damage the piston packing because water intake cannot be performed and idling occurs.

Maruyama MS755 - CAUTION - 1

text_image Grip Pressure indicator

- Close the discharge ball valve.

Maruyama MS755 - CAUTION - 2

natural_image Mechanical assembly diagram showing two vertical components with rotational arrows indicating motion (no text or symbols)

Maruyama MS755 - CAUTION - 3

CAUTION

If water intake is started without the valve closed, the conditioner may suddenly come out of the valve or nozzle may move fast. Be sure to close the valve.

Maruyama MS755 - CAUTION - 1

natural_image Technical line drawing of a mechanical component with internal fan structure (no text or symbols)

Maruyama MS755 - CAUTION - 2

text_image Pressurize Pressure UPR Handle

Maruyama MS755 - CAUTION - 3

text_image Pressure indicator 2.0 2.5 Pressure value

Maruyama MS755 - CAUTION - 4

natural_image Technical line drawing of mechanical components with no visible text or symbols

Maruyama MS755 - CAUTION - 5

natural_image Technical line drawing of a mechanical assembly with no visible text or symbols

- At the start and during operation, be sure to keep the belt cover attached.

Maruyama MS755 - CAUTION - 6

WARNING

Since the rotary part may result in injury to personnel, be sure to attach the belt cover. If the belt cover cannot be attached, be sure to take special considerations e.g. provide a fence around the working machine.

- Rotate the pressure control valve handle to the "Pressurize" position.

CAUTION

  • Rotate the pressure control valve handle fully. If the handle is in a midway and operation is started, the internal seat will be damaged.
  • Make sure that water intake is in progress. If water intake is not performed (idling is kept) for at least one minute after the start, the piston packing will be damaged. Again, see Troubleshooting and Actions on Pages 17 and 18 and repeat the operation.

Maruyama MS755 - CAUTION - 1

CAUTION

If the pressure is suddenly increased during two-person operation, a strong reaction force is given to the spray apparatus and it is dangerous. Open the valve after a sign is given in advance from spray operator.

Stop

- When stopping the pump, return the grip to "0", and the handle to the "Start" position. A compression spring is used for pressure adjustment. If a positive pressure remains in the hose, the pressurized liquid may come out when removing the pipe.

4. Cleaning, Maintenance, and Storage

Maruyama MS755 - Cleaning, Maintenance, and Storage - 1

natural_image Diagram of a pipe being inserted into a bucket with a hose inserted, showing fluid flow direction (no text or labels)

• After the operation, remove any fluid, drain the chemical solution remaining in the tank, then perform cleaning. Future problems with pump start can be prevented by normal regular cleaning.

CAUTION

For disposal of water after washing this machine, special care must be take so that chemical disasters will not occur same as the conditioner.

For the chemical handling method, read the instruction manual of the chemical carefully.

- Remove the nozzle from the hose, lift the water intake strainer from water, and run this machine at a low speed with the valve opened to drain water (Grip: "0", Handle: "Start").

Maruyama MS755 - CAUTION - 1

natural_image Diagram showing a pipe being inserted into a bucket with arrows indicating flow direction (no text or labels)

CAUTION

Idling must be less than one minute for machine protection.

Maruyama MS755 - CAUTION - 1

text_image Bypass hose Suction hose

Maruyama MS755 - CAUTION - 2

natural_image Technical line drawing of a mechanical valve assembly with no visible text or symbols

Maruyama MS755 - CAUTION - 3

text_image Drain plug

Maruyama MS755 - CAUTION - 4

natural_image Mechanical assembly diagram showing a lever pressing a component with a magnified inset showing a circular cross-section (no text or symbols)

- If the water intake hose and extra water hose are left connected, the packing may be damaged and leaks may occur. Be sure to remove and store them.

- Store the regulator control spring with no load applied. To maintain the correct pressure indication, return the grip to "0", and the handle to the "Start" position.

- To prevent damages due to freezing in winter season, remove water completely before storage. Specifically, loosen the drain plug shown in the figure, drain water from the inside of the machine, and perform cleaning, maintenance, and storage.

Maruyama MS755 - CAUTION - 5

CAUTION

Remove oil after oil cools down.

  • Before replacing oil, make sure that this machine has stopped.
  • For the first time replacement, replace oil after 50 hours have elapsed. Then, replace every 100 hours. Since oil degrades, replace oil at least once a year (SAE 10W-30 or equivalent) even if the 50 or 100 hours mark has not passed.

- “Troubleshooting and Actions for Power Sprayer” lists conditions that may occur and the actions to be taken. Should any failure occur, see the list and take the proper action. If you do not know the cause or have any question, please contact your MARUYAMA service dealer.

  1. Model
  2. Serial No.
  3. Failure description (what resulted in what how by doing what)

Detail these matters.

For Ⓞ, ask your MARUYAMA service dealer for adjustment or repair.

Maruyama MS755 - Remove oil after oil cools down. - 1

WARNING

Do not remove the cap on the top of the pressure control valve grip and adjust the screw. A pressure higher than specified may occur, the machine may be damaged, and personal injury may occur. Therefore, never take this action.

StateCause Action
(1)No suctionor low suctionTransmissionBelt slip Adjust/replace______
To the water intake portSuction clogged with dust / dirt Clean______Suction hose damaged/bent Repair/replaceWater intake connection packing failure ____ Repair/replaceConnection error ____ Connect correctlyToo long water intake hose Replace______Too large water intake pump head–Decrease depth
Water intake and pressurizing part (cylinder)Water intake valve/discharge valve clogged with dust or stuck— CleanWater intake valve/discharge valve assembly error— Assemble correctlyWater intake valve/discharge valve damaged or worn out — Correct/replaceDischarge valve spring broken Replace______Piston packing damaged Replace______O-ring damaged Replace______Seal packing damaged Replace______
Pressure controlPressure control valve handle in the pressurizing state — Move the handle to the start positionPressure control stuck in position—— Disassemble/clean
(2)Pressure does not increaseWater intake and pressurizing partInsufficient water intake volume See (1)—
Pressure controlPressure control valve ball/ball seat damaged— ReplacePressure control valve rod error Adjust/replacePressure control valve spring cylinder error — Repair/replacePressure control valve spring damaged/degraded — Replace
(3)Pressuredecreases ifthe dischargevalve isopenedNozzleNozzle worn out Replace____Excessive nozzle spray volume____Replace with a proper nozzle
Power sprayerLow water intake volume See (1)____
HoseToo long spray hose ____ Set the proper lengthToo thin spray hose ____ Set the proper thicknessWater leak from hose connection Repair/replace
(4) Spraying hose vibrationAir chamber filled with water ____ Open suction line to allow air in(idling within 1 minute)Poor pressure control valve motion ____ Disassemble/adjustWater intake/pressurizing line error ____ Disassemble/adjust(clogging, looseness)Nozzle clogged Clean____
(5) NoiseV pulley fastening bolt loosened Retighten/replaceConnection rod bolt, etc. loosened RetightenBearing broken Replace____Pressure control valve assembly error AdjustAir intake Check____
(6) Liquid leak/oil leakO-ring damaged Replace____Seal packing damaged Replace____Oil seal damaged Replace____Tightening/assembly error ____ Disassemble/adjust

After-sale Servicing

  • If any trouble is found during check at the start or during use, perform the proper maintenance immediately. Please contact your MARUYAMA Service dealer.
  • Trouble description

○Model

○Serial No.

○Failure description

What resulted in what how by doing what.

Describe the details.

- To use this product safely, correct operation and periodic maintenance are required. Please request your MARUYAMA Service dealer for check and maintenance.

Changing the direction of the extra water port

  • To change the direction of the bypass port, a new handle is required. Please contact MARUYAMA Service dealer.
  • Do not attach any device or valve to the bypass port or hose. Pump damage will occur.

Machine Modification

Maruyama MS755 - Machine Modification - 1

WARNING

Do not modify the machine because it is dangerous. Machine modification or use not specified by the instruction manual may not be covered by the guarantee.

Table of Specifications

NameMS315MS415MS515MS615MS655MS755
Basic dimensions (mm):Length x Width x Height415×242×298415×242×361449×271×359510×312×397510×312×417551×312×417
Mass (dry) (kg)10.51114.5191920
Performance AccessoriesRotating speed (mln-1)Maximum90011009008501000950
Water supply110015001200110012001050
Water intake volume (L/min)Maximum263237475667
Water supply324150616373
Pressure (MPa)Maximum5.05.04.05.05.05.0
Water supply1.01.01.51.51.51.5
Specified power (kW)Maximum2.63.32.94.75.56.7
Water supply1.01.32.02.62.62.9
Spray valveG1/4 , G3/8G3/8×2
Type of lubricantSAE10W-30 or SAE30 Non-Detergent
Lubricant volume(L)0.6 1.15
V pulley(mm)152 (A-2)178 (A-2) 229 (B-2)
Instruction manual1
Water intake hose 19×3m 25×3.6m
Water intake strainer30 mesh
Extra water hose 13×3m 19×3.6m
Band350mm

Maruyama MS755 - WARNING - 1

line | Power sprayer rotating speed (min⁻¹) | MS315MS40MS615 volume (L/min) | Specified power (kW) | | ----------------------------------- | ------------------------------ | -------------------- | | 700 | 2.0 | 1.0 | | 800 | 2.5 | 1.2 | | 900 | 3.0 | 1.5 | | 1000 | 3.5 | 1.8 | | 1100 | 4.0 | 2.0 |

Maruyama MS755 - WARNING - 2

line | Power sprayer rotating speed (min⁻¹) | Water intake volume (L/min) | Specified power (kW) | | ----------------------------------- | -------------------------- | -------------------- | | 900 | 26 | 1.0 | | 1100 | 32 | 1.5 | | 1300 | 36 | 2.0 | | 1500 | 41 | 3.5 |

Maruyama MS755 - WARNING - 3

line | Power sprayer rotating speed (min⁻¹) | Water intake volume (L/min) | Specified power (kW) | | ----------------------------------- | -------------------------- | -------------------- | | 800 | 4.0 | 2.0 | | 900 | 3.5 | 2.5 | | 1000 | 3.0 | 3.0 | | 1100 | 2.5 | 3.5 | | 1200 | 2.0 | 4.0 |

Maruyama MS755 - WARNING - 4

line | Power sprayer rotating speed (min⁻¹) | Specified power (kW) | | ----------------------------------- | -------------------- | | 650 | 2.0 | | 750 | 3.0 | | 850 | 4.0 | | 950 | 5.0 | | 1100 | 6.0 |

Maruyama MS755 - WARNING - 5

line | Power sprayer rotating speed (min⁻¹) | Water intake volume (L/min) | Specified power (kW) | | ----------------------------------- | --------------------------- | -------------------- | | 800 | 45 | 2.0 | | 900 | 51 | 2.5 | | 1000 | 56 | 3.0 | | 1100 | 58 | 2.5 | | 1200 | 63 | 2.5 |

Maruyama MS755 - WARNING - 6

line | Power sprayer rotating speed (min⁻¹) | Water intake volume (L/min) | Specified power (kW) | | ----------------------------------- | --------------------------- | -------------------- | | 750 | 52 | 4.0 | | 850 | 59.5 | 6.0 | | 950 | 67 | 7.0 | | 1050 | 73 | 7.0 |

* The unit in the graph is MPa

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natural_image Illustration of two individuals performing CPR on a man lying on the ground, with a first aid kit nearby (no text or symbols)
natural_image Illustration of a person standing near a rural field with hoses and houses (no text or symbols)
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1.021

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1-019

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PRECAUCIÓN

Este bomba de piston no contiene aceite. Antes de usarlo, suminístrele aceite.

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natural_image Diagram showing a bucket being inserted into a container with a hose inserted (no text or symbols present)

Maruyama MS755 - Este bomba de piston no contiene aceite. Antes de usarlo, suminístrele aceite. - 1

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Maruyama MS755 - Este bomba de piston no contiene aceite. Antes de usarlo, suminístrele aceite. - 2

PRECAUCIÓN

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Parada

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natural_image Mechanical assembly diagram showing a tool interacting with a motor and a circular component (no text or symbols)

Maruyama MS755 - Parada - 1

PRECAUCIÓN

natural_image Two workers in uniform exchanging a baby on a surface, with small crown fragments nearby (no text or symbols)
natural_image Illustration of two individuals performing CPR on a patient lying on the ground, with a first aid kit nearby (no text or symbols)
natural_image Illustration of a person standing near equipment and a fence in an open field (no text or symbols visible)

1-020

natural_image Illustration of a person standing in a field with equipment and pipes, no visible text or symbols

1-021

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1-015

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Maruyama MS755 - PRECAUCIÓN - 1

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1-024

natural_image Illustration of a person washing hands with a showerhead, and another person drinking from a basin (no text or symbols)

Accessoires standards

Maruyama MS755 - Accessoires standards - 1

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Mode d'emploi

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natural_image Mechanical assembly diagram showing a tool interacting with a motor and a circular component (no text or symbols)

Maruyama MS755 - Accessoires standards - 2

natural_image Technical line drawing of a mechanical assembly with pulleys and a wheel (no text or symbols)

Maruyama MS755 - Accessoires standards - 3

natural_image Illustration of a bucket being inserted into a container with a hose, showing fluid flow direction (no text or symbols)

Maruyama MS755 - Accessoires standards - 4

natural_image Mechanical assembly diagram showing two vertical components with rotational arrows indicating motion (no text or symbols)
natural_image Technical line drawing of a mechanical component with internal fan structure (no text or symbols)

Maruyama MS755 - Accessoires standards - 5

text_image Pressuriser Pressure LEVIER Levier

Maruyama MS755 - Accessoires standards - 6

natural_image Technical line drawing of mechanical components with no visible text or symbols

Maruyama MS755 - Accessoires standards - 7

natural_image Technical line drawing of a mechanical assembly with no visible text or symbols
natural_image Diagram of a pipe being inserted into a bucket with a hose inserted, showing fluid flow direction (no text or labels)
natural_image Diagram showing a pipe being inserted into a bucket with arrows indicating flow direction (no text or labels)

ATTENTION

natural_image Technical line drawing of a mechanical valve assembly (no text or symbols)

Maruyama MS755 - ATTENTION - 1

text_image Bouchon du robinet de vidange

Maruyama MS755 - ATTENTION - 2

natural_image Mechanical assembly diagram showing a lever and wheel mechanism with a magnified circular detail (no text or symbols)
Table of contents Click a title to access it
Manual assistant
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Product information

Brand : Maruyama

Model : MS755

Category : Pump