65136 kubota d722 injector pump repair€¦ · the injector pump avant p/n 65136, kubota p/n...

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Kubota D 722 injector pump repair

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The Injector pumpThe Injector pump Avant p/n 65136, Kubota p/n 16006-51010 Avant p/n 65136, Kubota p/n 16006-51010 isis

bolted to the engine with 4 pcsbolted to the engine with 4 pcs 5 5 mm allen screwsmm allen screws. .

When opening the srews the injector pump will pop upwards a little.When opening the srews the injector pump will pop upwards a little.

There is a shim plate between the engine body and the pump body. This must be There is a shim plate between the engine body and the pump body. This must be

placed back in its position when mounting.placed back in its position when mounting. If the shim is forgotten the engine If the shim is forgotten the engine

will not run properly.will not run properly.

Cover the opening in the engine body during injector pump repair Cover the opening in the engine body during injector pump repair

so that nothing falls into the engine.so that nothing falls into the engine.

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If there is cold slime in the engine,If there is cold slime in the engine, the slime must be removed mechanically.the slime must be removed mechanically.

The engine oil and oil filter needs to be changed when this repair is done.The engine oil and oil filter needs to be changed when this repair is done.

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In thius picture the ”cold slime” is visibleIn thius picture the ”cold slime” is visible

It is mixture of engine oil an humidity.It is mixture of engine oil an humidity.This can occur when the This can occur when the

ambient temperature is ambient temperature is

near 0 degrees celcius and near 0 degrees celcius and

the humidity is high and usage the humidity is high and usage

of the motor is very short of the motor is very short

period at a time.period at a time.

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Remove the retaining clip,Remove the retaining clip,

with small screw driverwith small screw driver

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Remove the retaining clip,Remove the retaining clip,

with small screw driverwith small screw driver

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Press in on the roller to remove the locking pinPress in on the roller to remove the locking pin

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Press in on the roller to remove the locking pinPress in on the roller to remove the locking pin

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Pull out the roller unitPull out the roller unit

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Remove the lock plate for the piston.Remove the lock plate for the piston.

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1. 1. Retainer clipRetainer clip

2. 2. Locking pinLocking pin

3. 3. Roller unitRoller unit

4. 4. Lock plate Lock plate

5. 5. PistonPiston

6. 6. SpringSpring

77. Upper spring cup. Upper spring cup

8. Adjustment piece8. Adjustment piece

9. 9. Control leverControl lever

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These parts are often corroded by the cold slime:These parts are often corroded by the cold slime:

Both parts must be cleaned from rust with Both parts must be cleaned from rust with

fine sandpaper or steel wool.fine sandpaper or steel wool.

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This is how the parts are inside the pump unit. If the parts are not rustfree the pump is not working properly

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In the piston there is a diagonal groove.In the piston there is a diagonal groove.

This groove is set to the opposite side This groove is set to the opposite side

from the control lever from the control lever

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Kubota D 722 injector pump repair: ruiskutuspumpun korjaus

Spring : Kubota p/n 15841-51280In this picture there is rust that will cause the spring to break soon.

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Kubota D 722 injector pump repair: ruiskutuspumpun korjaus

Spring : Kubota p/n 15841-51280If there is rust the springs need to be changed. It is a good idea to changeall 3 springs when doing this repair.

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First the adjustment piece is placedFirst the adjustment piece is placed

in the pump body so that the ball is in in the pump body so that the ball is in

the hole of the control lever. the hole of the control lever.

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With the control lever the movement of the With the control lever the movement of the

adjustment piece is tested.adjustment piece is tested.

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With the control lever the movement With the control lever the movement

of the adjustment piece is tested.of the adjustment piece is tested.

The adjustment piece will turn from The adjustment piece will turn from

side to side when moving the lever.side to side when moving the lever.

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The upper spring cup is next to The upper spring cup is next to

be placed in the pump. be placed in the pump.

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The spring is mounted.The spring is mounted.

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Pay attention when assembling the piston to the pump.Pay attention when assembling the piston to the pump.

The diagonal groove is on the opposite side of theThe diagonal groove is on the opposite side of the

control lever. Do not push all the way down.control lever. Do not push all the way down.

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Attention:Attention: The diagonal groove The diagonal groove

must be on the opposite side must be on the opposite side

from the control lever.from the control lever.

If the piston is placed wrong If the piston is placed wrong

way the, the engine will smoke way the, the engine will smoke

heavily and does not stop.heavily and does not stop.

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Attention: The diagonal groove Attention: The diagonal groove

must be on the opposite side must be on the opposite side

from the control lever.from the control lever.

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The lock plate is placed next.The lock plate is placed next.

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On the roller unit there is a spacer On the roller unit there is a spacer

that goes next.that goes next.

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The roller unit is placed so that the opening The roller unit is placed so that the opening

on the side is towards the locking pin hole.on the side is towards the locking pin hole.

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The roller unit is pushed agaisnt the spring.The roller unit is pushed agaisnt the spring.

Utill the locking pin fits. This should take very little force,Utill the locking pin fits. This should take very little force,

if the roller feels stuck, moving the control if the roller feels stuck, moving the control

lever a little will help.lever a little will help.

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The retainer clip is placed back toThe retainer clip is placed back to

its position.its position.

When the repair is complete the When the repair is complete the

control lever should move form control lever should move form

side to side when tilting the pump.side to side when tilting the pump.

The pump should be lubricated with The pump should be lubricated with

weapon oil or engine oil before weapon oil or engine oil before

being mounted back to the engine being mounted back to the engine

65136 kubota d722 injector pump repair€¦ · the injector pump avant p/n 65136, kubota p/n...

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