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AIR CONDITIONING
24-35
bearing, test indexing of tangs again by pressing down
with thumbs to see if it has the proper spring action
(Fig. 48).
(5)
Lubricate and install the crankshaft bearing
housing seal face plate with the smooth (micro-finish)
side up. Use a sleeve with the minimum inside diame-
ter
of
l3/8
inches to avoid damaging the micro-finish
sealing surface of the face plate. Tap the sleeve lightly
until the seal face plate is fully seated in the housing.
(6) Install the bearing housing oil seal, using plenty
of refrigerant oil.
(7) Install the housing, making sure that it is in
proper alignment with the screw holes. The gas seal
assembly may be damaged if the bearing housing is
rotated after the housing seal contacts the carbon
seal.
(8) Install the bolts and tighten 10 to 13 foot-pounds
torque.
Crankshaft and Ball Bearing-Removal
(1)
Remove the cylinder heads and valve plates.
(2)
Remove the pistons and connecting rods.
(3) Remove the crankshaft bearing housing and
NOTE: The pistons and rods must be completely
removed before the crankshaft removal.
(4) Remove the crankshaft and thrust washer from
the crankcase.
(5) To remove the crankshaft ball bearing, use a
small arbor press. Make sure the bearing is properly
supported before pressing the bearing from the shaft.
gas seal.
Inspection
Clean and inspect all parts. Replace questionable
parts as required. If the crankshaft ball bearing is in
good condition and clean, protect
it
against entry of
dirt and re-use it. If bearing is serviceable but dirty,
or there is evidence of dirt, clean it carefully with
mineral spirits and shake dry. Saturate bearing with
clean refrigerant oil and assemble immediately. If
a new bearing is to be installed, leave it wrapped in
its protective package until ready for installation.
NOTE: Do not wash a new bearing assembly be-
fore installation.
Installation
(1)
Press the crankshaft ball bearing on the crank-
shaft using a sleeve which bears on the inner race
only.
(2)
Install the crankshaft, making sure that the
thrust washer is on the rear bearing journal before
placing the crankshaft in the crankcase.
(3) Rotate the crankshaft to engage the oil pump
shaft in the crankshaft slot.
(4) Install the gas seal and crankshaft bearing hous-
ing. Use a suitable tool, as shown in Figure
49,
to as-
sure free axial movement.
R
Fig. 49-Checking
Crankshaft Axial Movement
(5) Install the pistons and connecting rods.
(6) After the pistons and connecting rods are in-
stalled, turn the crankshaft to test for freeness. The
shaft should turn without binding.
(7) Install oil sump, valve plates and cylinder heads.
Oil
Pump-Removal
the crankcase to remove the oil pump.
It is not necessary to drain the refrigerant oil from
(1) Remove the oil pump cover plate and oil seal.
(2)
Remove the drive shaft and rotors.
Installation
(1)
Install the oil pump drive shaft by rotating the
shaft until the tang end engages in the crankshaft
slot.
THERMAL BULB
N Y 897
Fig. 50-Thermal
Bulb Installed Uypicall
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