ARMY TM 9-2815-255-24 AIR FORCE TO 38G1-95-2 MARINE CORPS TM 2815-24/4 3-44.4.  Installation. a.    Install gear (11, FIGURE 3-118) 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. (2) Install key (12) in crankshaft (7) slot, and using driver (JDH-7), drive heated gear (11) onto crankshaft. b.    Install main bearing (6) inserts.  Make sure that tang on inserts is engaged with slot in engine block and main bearing caps.  Also make sure that oil holes line up with oil passages in block. CAUTION If new thrust bearing Inserts or thrust bearing washers are installed, they must be Installed as a set. c.    Install main thrust bearing (5) in rear web of engine block d.    Apply a liberal coating of clean engine lubricating oil (MIL-L-2104) to bearing surfaces and crankshaft journals. e.    Using proper lifting equipment, lower crankshaft (7) onto main bearings. f.    Dip  entire  bearing  capscrews  (1)  in  clean  engine  lubricating  oil  (MIL-L-2104)  and  position  them  in  the  main bearing caps.  Apply a liberal amount of oil to bearing inserts in caps. NOTE Make sure bearing caps are installed on the bearing bosses from which they were removed.  The numbers stamped on the caps should be on the same side as the numbers on the block.  If there is an arrow on cap, arrow must point toward camshaft side of block. g.    Install each bearing cap (3 and 4), bearings (5 and 6), and capscrews (1) with washers (2) with the recesses and tabs aligned in matching order.  Make sure bearing tabs also match up before tightening capscrews. CAUTION Do  not  use  pneumatic  wrench  to  install  main  bearing  capscrews,  as  damage  may  occur  to  the threads. h.    Before  tightening  capscrews  on  main  bearing  caps,  align  upper  and  lower  thrust  washers  or  flanges  on  main thrust bearings (5).  Using a soft-face hammer, tap crankshaft to the rear and then to the front to line up thrust bearing surfaces. x