TM 5-3810-300-24 & P2
NOTE
IN THE CASE OF COMPRESSORS WITH A REAR BALL BEARING, PLACE TWO SMALL SEAL
RINGS IN THE COUNTER-SUNK AT THE REAR OF THE CRANKCASE. IN ONE CASE A GASKET IS
USED AND IN ANOTHER A LARGE O-RING IS PLACED IN THE COUNTERBORE AT THE REAR OF
THE CRANKCASE. THESE ARE IN ADDITION TO THE SEAL RINGS.
F. Install the rear end cover in the proper position as marked before disassembly.
CAUTION
IN THE CASE OF COMPRESSORS WITH A SLEEVE BEARING EITHER FRONT OR REAR, PLACE
THE TWO SMALL SEAL RINGS IN THE COUNTER-SUNK HOLES IN THE CRANKCASE. AN END
COVER GASKET MUST NOT BE USED.
G. Place the O-ring seal in the groove around the flange adapter or the end cover, and affix the thrust washer.
H. Install the flange adapter or end cover in the proper position as marked before disassembly, taking care not to
damage the sleeve bearing.
NOTE
FOR CAST IRON FLANGE ADAPTERS, TORQUE THE FOUR 7/16" CAP SCREWS TO 38-45 FOOT
POUNDS. FOR DIE CAST ALUMINUM END COVERS, TORQUE THE FOUR 7/16" CAP SCREWS TO
25-30 FOOT POUNDS. ALL END COVERS USING 5/16" CAP SCREWS OR STUD AND NUTS ARE
TORQUED TO 15-18 FOOT POUNDS. FOR THROUGH DRIVE COMPRESSORS WITH A CAST IRON
END COVER, TORQUE THE FOUR 7/16" CAP SCREWS TO 25-30 FOOT POUNDS.
I.
Secure the flange adapter, front or rear end cover to the crankcase by tightening the four cap screws.
2. Pistons and Connecting Rods.
NOTE
IF NEW WRIST PIN BUSHINGS ARE TO BE USED, THEY SHOULD BE PRESSED INTO THE
CONNECTING RODS SO THAT THE OIL HOLE IN THE BUSHING LINES UP WITH THE ONE IN THE
ROD. THE NEW BUSHINGS SHOULD THEN BE REAMED OR HONED TO PROVIDE BETWEEN
0.0001" AND 0.0006" CLEARANCE ON THE WRIST PIN.
A. Position the connecting rod in the piston and press in the wrist pin so the lockwire hole in the pin aligns with that
of the piston.
B. Install the new lockwire through piston and wrist pin and lock same by snapping the short end into the lockwire
hole at the bottom of the piston.
C. Install the piston rings in the correct location with the ring pipmarks up.
D. Stagger the position of the ring gaps. Prelubricate the piston, piston rings, wrist pin and connecting rod bearings
with clean engine oil before installing them in the compressor.
E. Remove the connecting bolts and bearing cap from one connecting rod.
F. Turn the crankshaft so that one of its connecting rod journals is in the downward, center position.
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