ARMY TM 9-2815-256-24
AIR FORCE TO 38G1-96-2
MARINE CORPS TM 2815-24/5
Care must be taken to avoid localized heating which often produces grinding cracks. Use coolant generously to
cool crankshaft while grinding. Do not crowd grinding wheel into work.
Polish or lap (counterclockwise) ground surfaces to specified finish. Reground journals will be subject to
excessive wear unless polished smooth.
When thrust surfaces are reground and an oversize washer is used, crankshaft end play specification
must be maintained.
If thrust surfaces of crankshaft are worn or grooved excessively, they must be reground and polished. Care must
be taken to maintain specified radius between each thrust surface and bearing journal. An oversize thrust
washer set is available.
Stone edge of all oil holes in journal surfaces smooth to provide a radius of approximately 0.060 inch (1.50 mm).
After grinding has been completed, inspect crankshaft by fluorescent magnetic particle method, or other similar
method to determine if cracks have originated due to grinding operation.
Cleaning solvent is flammable and toxic to eyes, skin, and respiratory tract. Skin/eye protection
required. Avoid repeated/prolonged contact. Good general ventilation is normally adequate.
Compressed air used for cleaning can create airborne particles that may enter the eyes. Pressure
will not exceed 30 psig (207 kPa). Eye protection required.
Thoroughly clean crankshaft and oil passages with solvent. Dry with compressed air.
Install gear (11, FIGURE 3-137) on crankshaft as follows:
Oil fumes or oil can ignite above 380° F (193°C). Use a thermometer and do not exceed 360°F
(182°C). Do not allow a flame or heating element to be in direct contact with oil. Heat oil in a well
ventilated area. Plan a safe handling procedure to avoid burns. Wear protective clothing, gloves,
Heat gear (11), in oil, to 360°F (182°C).
A properly heated gear may not require a driver for installation.