Remove and replace the compression assembly.
(a) Remove the motor and compressor assembly from the transit case
per the steps described in paragraph 4-2a(1)--(3).
(b) Remove the intake flex hoses from cylinder to cylinder (hose
clamps secure flex hoses to each end).
Remove the intake silencer from the top cylinder.
(d) Disconnect the cable from the motor box to the capacitor at the
connector on the capacitor.
(e) Disconnect the cable from the circuit breaker to the fan at the
(f) Remove four nuts, lock washer, and washers from the bolts that
secure the motor and the compressor to the base plate.
(g) Lift the motor and compressor assembly from the base plate. (Note
the four spacers under the motor and compressor assembly.)
(h) Remove the cylinder assemblies by removing the four bolts and
lock washers from each cylinder head.
Remove the front half of the crankcase by removing three bolts.
(j) Inspect the compression and expander rings for signs of wear or
damage. If you must replace them, carefully remove them from the pistons.
Remove the counterbalance by removing one bolt and lock washer.
(l) Insert two jacking bolts into the two threaded holes in the
crankshaft assembly. Slowly turn them in equal increments to pull the piston assembly
off the motor shaft.
(m) If you are replacing the motor or crankcase, remove four bolts and
lock washers to remove the rear half of the crankcase.
(n) Replace the rear half of the crankcase by securing in place with
four bolts and lock washers. Torque these bolts to 250 inch-pounds and apply Locktite
The front and rear assemblies are a matched assembly. You must replace
them as a set.