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 TM 10-3930-660-24-2
CYLINDER HEAD ASSEMBLY REPAIR - CONTINUED
0270 00
DISASSEMBLY - CONTINUED
NOTE
The following valve removal procedure is applicable to all 12 valves.
4
3.
Compress valve spring (3) using a valve spring com-
pressor.
5
4.
Remove and discard collets (4).
5.
Release spring pressure and remove compressor.
3
6.
Remove spring retainer (5) and spring (3).
6
7.
Remove intake and exhaust valves (1 and 2).
8.
Remove and discard valve stem seals (6).
1
409-4105
2
CLEANING
WARNING
Cleaning compound, solvent MIL-PRF-680 Type III is an environmentally compliant and low toxic
material. However, it may be irritating to the eyes and skin. Use protective gloves and goggles. Use in
well-ventilated areas. Keep away from open flames and other sources of ignition.
NOTE: P-D-680 Type II is no longer in use and has been replaced by MIL-PRF-680 Type III.
Particles blown by compressed air are hazardous. DO NOT exceed 15 psi (103 kPa) nozzle pressure
when drying parts with compressed air. Use a maximum of 30 psi (207 kPa) when cleaning compo-
nents. DO NOT direct compressed air against human skin. Failure to follow this warning may cause
injury or death. Make sure air stream is directed away from user and other personnel in the area. To pre-
vent injury, user must wear protective goggles or face shield.
NOTE
If cylinder head and valve components are not to be assembled right away, lightly oil and wrap the parts
after inspection and before storing.
See Cleaning instructions (WP 0316 00).
1.
2.
Polish cylinder head gasket surfaces with Scotch-brite pads.
3.
Clean carbon from valves and remark according to location in head.
4.
Clean valve heads with a soft wire wheel.
5.
Clean valve stems with crocus cloth.
6.
Wash valves with fuel oil and wipe dry with clean wiping rag.
0270 00-2
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