TM 5-3805-248-23-2
EJECTOR CYLINDER REPAIR - CONTINUED
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CLEANING
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.
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.
1.
Remove all preformed packing material from mounting surfaces.
2.
Use emery cloth to scuff surfaces of the counterbore in the cylinder head and the outside diameter of the new seals'
metal shell.
3.
Clean all parts with solvent cleaning compound.
4.
Clean the counterbore and the metal shell of the new seals until none of the components discolor a clean white towel.
NOTE
The metal shell of the seal is coated with a corrosion inhibitor. This may prevent proper bonding of the seal
to the cylinder head if the inhibitor is not removed. After cleaning, do not touch the counterbore of the metal
shell because the oil from your fingers may prevent a good bond. Handle the seal by the lip only.
5.
Dry all parts with compressed air.
INSPECTION
1.
Inspect cylinder (5) for dents, rust or other damage. Replace if necessary. Bore of a new cylinder (5), if replaced, must
be 6.500+0.005 or -0.002 in. (165.1+0.127 or -0.0508 mm).
2.
Inspect rod (7) for nicks, scratches or other damage. Replace if necessary. Diameter of new rod (7), if replaced, must be
3.9980.001 in. (101.5490.0254 mm).
3.
Inspect head (19) for dents, cracks, rust or other damage. Replace if necessary. Bore in new rod (19), if replaced, must
be 4.0030.001 in. (101.6760.0254 mm).
4.
Inspect all other parts.
ASSEMBLY
1.
Use clean engine oil to coat new ring (16) and new preformed packing (15).
2.
Install new ring (16) and new preformed packing (15) in head (9).
3.
Use clean engine oil to coat new seals (19, 18 and 17).
4.
Install new seal (17) in innermost groove of head (9).
5.
Install new seal (18) on side with groove toward seal (17).
6.
Install new seal (19) with lip facing outward.
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