BACKHOE CONTROL VALVE, DIPPER AND BUCKET SECTION VALVES REPAIR

TM 5-2420-224-34

BACKHOE CONTROL VALVE, DIPPER AND BUCKET SECTION VALVES

REPAIR

This task covers:

a. Disassembly b. Inspection c. Assembly d. Testing e. Adjustment

Equipment Condition:

Applicable Configuration:

SEE

Reference

Condition Description

Dipper Section Valve or

Page 20-41

Tools and Special Equipment:

Bucket Section Valve

Shop Equipment, SC 4910-95-CL-A31

Removed from Backhoe

Tool Kit, SC 5180-90-CL-N26

Control Valve

Tool Outfit (HSTRU), NSN 4940-01-036-5784

Fabricated Tool, Appendix C, Item 5

General Safety Instructions:

Materials/Parts:

WARNING

Packing (2)

Wear safety goggles when

Packing (2)

p e r f o r m i n g leakage tests on

Kit, Repair (4)

v a l v e s . Failure to do so may

r e s u l t in serious eye injury

Appendix B, Item 8

Caps and Plugs

due to high pressure oil.

Oil, Lubricating

Appendix B, Item 30

Fuel and oil are slippery and

Rags

Appendix B, Item 40

can cause falls. To avoid

injury, wipe up spilled fuel or

oil with rags.

DISASSEMBLY

NOTE

Procedure is the same for both

dipper section valve and bucket

section valve.

Tag safety relief valves prior to

removal to aid in installation.

REMOVE safety relief VALVE (1) and three

packings (2, 3, and 4). DISCARD PACKINGS.

REPEAT STEP 1 for opposite safety relief

valve (5).

20-69