TM 9-2320-272-24-1
THIS TASK COVERS:
b. Installation
a. Removal
APPLICABLE MODELS
REFERENCES (TM)
TM 9-2320-272-10
M931/A1/A2, M932/A1/A2
TM 9-2320-272-24P
TOOLS
General mechanic's tool kit (Appendix E, Item 1) EQUIPMENT CONDITION
Parking brake set (TM 9-2320-272-10).
MATERIALS/PARTS
Air reservoirs drained (TM 9-2320-272-10).
Locknut (Appendix D, Item 299)
GENERAL SAFETY INSTRUCTIONS
Antiseize tape (Appendix C, Item 72)
Do not disconnect air lines before draining air
reservoirs.
Do not disconnect air lines before draining air reservoirs, Small
parts under pressure may shoot out with high velocity, causing
injury to personnel.
NOTE
Doublecheck valve No. 5 is used with airbrake kits on
M931/A1/A2 and M932/A1/A2 model vehicles. It is located inside
the left frame rail in back of the stoplight switch.
Tag air lines for installation.
1.
Disconnect two wires (6) from stoplight switch (5).
2.
Disconnect doublecheck valve No. 5 control line (8) from adapter tee (9).
3.
Disconnect protection valve control line (10) and trailer handbrake control line (7) from doublecheck
valve No. 2 (3).
4.
Remove locknut (2), screw (1), and doublecheck valve No. 2 (3) from left frame rail (4). Discard
locknut (2).
NOTE
If new doublecheck valve is being installed, use fittings from old
check valve.
Wrap all male pipe threads with antiseize tape before
installation.
1.
Position doublecheck valve No. 2 (3) against left frame rail (4) and install with screw (1) and new
locknut (2).
2.
Connect protection valve control line (10) and trailer handbrake control line (7) to doublecheck valve
No. 2 (3).
3.
Connect doublecheck valve No. 5 control line (8) to adapter tee (9).
4.
Connect two wires (6) to stoplight switch (5).
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