CLEANING AND INSPECTION - TM-5-2410-237-231315

TM 5-2410-237-23

CYLINDER HEAD INLET AND EXHAUST VALVES REPLACEMENT - CONTINUED

0245 01

CLEANING AND INSPECTION

WARNING

Solvent cleaning compound 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. Failure to follow this

warning may cause injury or death.

Particles blown by compressed air are hazardous. DO NOT exceed 15 psi (103 kPa) nozzle pressure

when drying parts with compressed air. DO NOT direct compressed air against human skin. Failure to

follow this warning may result in injury. Make sure air stream is directed away from user and other

personnel in the area. To prevent injury, user must wear protective goggles or face shield.

CAUTION

Use caution when cleaning rotocoil assembly. Do not disassemble rotocoil assembly as it can be easily dam-

aged. Ensure solvent is clean as foreign material entering rotocoil assembly will cause internal damage.

Thoroughly clean all removed components with solvent cleaning compound or other approved method of carbon

removal and dry thoroughly. Ensure all carbon buildup is removed from stems of valves.

Inspect valve seat insert for any signs of excessive wear, burned condition or other damage. Replace a damaged valve

seat insert.

Refer to Table 1 and measure the following: angle of face of valve seat insert (I); maximum permissible width of valve

seat (J); and outside diameter of face of valve seat insert. If measurements are not within limits specified, replace valve

seat insert.

Inspect valve stems for scratches or scuff marks. Inspect valve faces for ridges, cracks or pitting. If any of these defects

occur, replace valve.

If valves can be reused, grind valves and reinspect. Replace valve if distortion is more than dimensions provided in

Table 1.

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