ARMY TM 9-2815-256-24 AIR FORCE TO 38G1-96-2 MARINE CORPS TM 2815-24/5 d. 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. e. Polish or lap (counterclockwise) ground   surfaces   to   specified   finish.      Reground   journals   will   be   subject   to excessive wear unless polished smooth. NOTE When thrust surfaces are reground and an oversize washer is used, crankshaft end play specification must be maintained. f. 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. g. Stone edge of all oil holes in journal surfaces smooth to provide a radius of approximately 0.060 inch (1.50 mm). h. 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. i. Demagnetize crankshaft. WARNING 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. WARNING 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. j. Thoroughly clean crankshaft and oil passages with solvent.  Dry with compressed air. 3-43.4.  Installation. a. Install gear (11, FIGURE 3-137) on crankshaft as follows: WARNING 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, apron, etc. (1) Heat gear (11), in oil, to 360°F (182°C). NOTE A properly heated gear may not require a driver for installation. 3-187