HYDRAULIC SYSTEM OPERATION UNUSUALLY NOISY.

TM 9-2320-364-34-1

2-13. HYDRAULIC SYSTEM TROUBLESHOOTING (CONT).

7. HYDRAULIC SYSTEM OPERATION UNUSUALLY NOISY.

INITIAL SETUP

Tools and Special Tools

References

Tool Kit, General Mechanic's

TM 9-2320-364-10

(Item 240, Appendix F)

Pan, Drain 4 Gal (Item 144, Appendix F)

Equipment Condition

Engine OFF, (TM 9-2320-364-10)

Materials/Parts

Parking brake applied, (TM 9-2320-364-10)

Oil, Hydraulic (Item 34, Appendix B)

Wheels chocked, (TM 9-2320-364-10)

Lockwashers (4) (Item 266, Appendix E)

Coolant temperature at 190F, (88C)

Lockwashers (8) (Item 282, Appendix E)

Parts Kit, Seal (Item 411, Appendix E)

START

KNOWN INFO

TEST OPTIONS

WARNING

Read WARNING

Visual inspection.

Unit Troubleshooting tasks

on Page 2-241

completed.

Fan operates at high speed.

REASON FOR QUESTION

Is low speed differential

POSSIBLE PROBLEMS

If low speed differential

pressure sensing valve free

pressure sensing valve is

of dirt, clogging and

Low speed differential

blocked or faulty, an unusually

damage?

pressure sensing valve faulty.

noisy operation will occur.

Low speed differential

pressure sensing valve not

adjusted correctly.

Replace valve

(Para 17-18).

Verify repair, go to

Step 3 of this Fault.

YES

2-240