TM 5-4310-451-14
5-46. ENGINE OIL SAFETY RELIEF VALVE MAINTENANCE (Con’t).
b. DISASSEMBLY
WARNING
Spring Is under tension and can cause Injury If released suddenly. Keep spring under tension when
removing pin.
NOTE
Note location of pin during disassembly to assist In assembly.
1.
Compress spring (2) and remove pin (8) from relief valve body (4).
2.
Slowly release pressure on spring (2) and remove spring seat (1), spring, and valve (3) from relief valve body (4).
c. CLEANING AND INSPECTION
WARNING
• Dry cleaning solvent, P-D-680, Is toxic and flammable. Always wear protective goggles and gloves, and
use only In a well-ventilated area. Avoid contact with skin, eyes, and clothes, and DO NOT breathe
vapors. DO NOT use near open flame or excessive heat. The solvent's flash point is 100°F-138°F (38°C-
590C). If you become dizzy while using cleaning solvent, Immediately get fresh air and medical help. If
solvent contacts eyes, immediately wash your eyes and get medical aid.
• Compressed air used for cleaning or drying purposes, or for clearing restrictions, should never exceed
30 psi (207 kPa). Wear protective clothing (goggles/shield, gloves, etc.) and use caution to avoid Injury to
personnel.
1. Clean metal parts with dry cleaning solvent and dry with compressed air.
2. Inspect all parts for damage.
d. ASSEMBLY
1. Apply lubricating oil to valve (3). Insert valve, closed end first, into relief valve body (4).
2. Install spring (2) in relief valve body (4). Install spring seat (1) with open end over spring.
3. Compress spring seat (1) and install pin (8) in noted location.
e.
INSTALLATION
1. Aline new gasket (7) and relief valve body (4) on engine block.
2. Install two bolts (5) and new lockwashers (6) in relief valve body (4).
FOLLOW-ON TASKS:
• Install oil pan (see paragraph 4-32).
• Start engine (see paragraph 2-10) and check oil pressure.
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