TM 5-3805-262-34
3-12. AIR BRAKE SYSTEM MAINTENANCE (CONT)
c. Pressure Protection Valve.
This task covers disassembly, cleaning, inspec-
tion, reassembly, and adjustment of pressure protection valve.
TOOLS: No. 1 Common Organizational Maintenance Tool Kit
Safety glasses
Fixed open end wrench set
Vise
Drive pin punch, 1/8 inch point
Air pressure regulator
Air hose with 1/4 NPTF fitting on one end
MATERIALS/PARTS: Clean cloths (Appendix C, item 1)
Cleaning solvent P-D-680 (Appendix C, item 2)
Silicone lubricant (Appendix C, item 18)
Paint (Appendix C, item 22)
O-ring (FSCM 06853 PN 242391)
O-ring (FSCM 06853 PN 236640)
REFERENCE: TM 5-3805-262-20
NOTE
PRELIMINARY PROCEDURE: Pressure protection valve removed from loader
(refer to TM 5-3805-262-20).
DISASSEMBLY (SHEET 1 OF 2)
(1)
(2)
(3)
To
of
Put pressure protection valve body (12) in vise as shown.
Using paint or other suitable marker, make
match marks on cap (1) and body (12) to aid
reassembly.
Hold cap (1) to prevent it
from turning and loosen nut
(2).
NOTE
aid reassembly, note and record number
turns required to remove cap (1) when
performing following step.
(4) Remove cap (1) and record number
of turns.
(5) Remove nut (2).
(6) Remove spring (3) from piston (11).
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