TM 9-2320-260-34-1
11-4. UNLOADER VALVE REPLACEMENT
THIS TASK COVERS:
b. Installation
a. Removal
INITIAL SETUP
REFERENCES (TM)
APPLICABLE MODELS
TM 9-2320-260-10
All
TM 9-2320-260-20
TOOLS
TM 9-2320-260-34 P-1
General mechanic's tool kit
EQUIPMENT CONDITION
(Appendix B, Item 1)
Air reservoirs drained (TM 9-2320-260-10).
MATERIALS/PARTS
Radiator drained (TM 9-2320-260-20).
Packing (Appendix D, Item 311)
GENERAL SAFETY INSTRUCTIONS
Packing (Appendix D, Item 313)
Drain air reservoirs before disconnecting air lines.
Antiseize tape (Appendix C, Item 50)
Hold down unloader valve assembly during
removal.
a. Removal
WARNING
Drain air reservoirs before disconnecting air lines. Small parts
under pressure may shoot out with high velocity, causing injury to
personnel.
1.
Loosen nut (3) and disconnect air governor tube (4) from elbow (2).
WARNING
Unloader valve assembly must be held down during removal.
Small parts under pressure may shoot out, causing injury to
personnel.
2. Remove two screws (7) and washers (6) from air compressor head cover (5) and unloader valve
body (1).
3. Remove unloader valve body (1) from air compressor head cover (5).
4. Remove packings (10) and (11), unloader cap (9), and unloader spring (8) from unloader valve
body (1). Discard packings (10) and (11).
5. Remove elbow (2) from unloader valve body (1).
b. Installation
1. Apply antiseize tape to threads of elbow (2) and install on unloader valve body (1).
2. Install unloader valve spring (8), unloader cap (9), and new packings (10) and (11) in unloader valve
body (1).
3. Position unloader valve body (1) in air compressor head cover (5) and hold down.
4. Install unloader valve body (1) on air compressor head cover (5) with two washers (6) and screws (7).
5. Install air governor tube (4) on elbow (2) and tighten nut (3).
