Test hydraulic fan drive

AR20.40-W-0500A

Test hydraulic fan drive

4.8.10

21.7.10

Reference address added.

Step 5

AR20.40-W-0500-02B

Special tools added.

Step 5

*124589096300

*220589009900



Remove

 Danger!

Risk of injury to skin or eyes caused by hydraulic fluid spraying out under high pressure. Risk of poisoning caused by swallowing hydraulic fluid

Depressurize the hydraulic system completely before starting any work on the system. Wear protective clothing and safety glasses.

AS00.00-Z-0013-01A

 Danger!

Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running

Secure vehicle to prevent it from moving by itself.
Wear closed and snug-fitting work clothes.
Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

 Danger!

Risk of injury caused by moving parts that can pinch, crush or, in extreme cases, even sever extremities

No parts of the body or limbs should be within the operating range of the mechanism when moving components.

AS00.00-Z-0009-01A

 Danger!

Risk of injury caused by body parts being pinched or crushed as cab is tilted

Ensure that no one is within the tilting range of the cab as it is being tilted. Always tilt the cab all the way to the end position and secure with the safety strut.

AS60.80-Z-0001-01A



Notes on tilting the cab

AH60.80-N-0003-01A

1

Open maintenance flap

2

Tilt cab

3

Install testing unit and lines for pressure test at hydraulic fan drive

 Catch escaping hydraulic fluid.

AR20.40-W-0500-01A

 Measuring hose

*442589009000

 Testing unit

*625589012100

 Adapter

*957589026300

4

Check hydraulic fluid level for hydrostatic fan drive; correct if necessary

AP20.40-W-2001A



Checking

5

Test hydraulic pressure and fan speed

 Use digital tachometer.

Up to vehicle ident. end no. V 207574

AR20.40-W-0500-02A

As of vehicle ident. end no. V 207575

AR20.40-W-0500-02B

 Measuring hose

*442589009000

 Testing unit

*625589012100

 Adapter

*957589026300

 Ohm decade

*124589096300

 Electrical connection set

*220589009900

If a defect is detected replace the relevant component:



 Replace hydraulic pump fan

AR20.40-W-0400A

 Replace hydraulic motor (1) with hydrostatic fan proportional valve (Y66).

Up to vehicle ident. end no. V 207574

AR20.40-W-0001A

As of vehicle ident. end no. V 207575

AR20.40-W-0001JB



Install

6

Remove high-pressure hose (3), measuring hose (5), test equipment (6) and adapter (4) from fitting (2)

 Catch escaping hydraulic fluid.

7

Install high-pressure hose (3) on fitting (2) on hydraulic motor (1)

8

Check hydraulic fluid level for hydrostatic fan drive; correct if necessary

AP20.40-W-2001A

9

Start engine and afterwards allow the engine to run at alternating rpm.

10

Inspect hydraulic system for leaks

 Visual inspection.

11

Turn off engine

12

Lower cab

13

Close maintenance flap