Chrysler PT Cruiser Service & Repair Manual page 1675

PT
OIL PUMP
DESCRIPTION
The oil pump is located in the pump housing inside
the bell housing of the transaxle case (Fig. 268). The
oil pump consists of an inner and outer gear, a hous-
ing, and a cover that also serves as the reaction shaft
support.
Fig. 268 Oil Pump Assembly
1 - PUMP HOUSING
2 - OUTER PUMP GEAR
3 - INNER PUMP GEAR
4 - REACTION SHAFT SUPPORT
5 - SEAL RINGS (4)
6 - REACTION SHAFT
7 - CRESCENT
OPERATION
As the torque converter rotates, the converter hub
rotates the inner and outer gears. As the gears
rotate, the clearance
increases in the crescent area, and creates a suction
at the inlet side of the pump. This suction draws
fluid through the pump inlet from the oil pan. As the
clearance between the gear teeth in the crescent area
decreases, it forces pressurized fluid into the pump
outlet and to the valve body.
DISASSEMBLY
When disassembling the transaxle it is necessary
to inspect the oil pump for wear and damage.
(1) Remove the reaction shaft support bolts.
(2) Remove reaction shaft support from pump
housing (Fig. 269).
(3) Remove the pump gears (Fig. 270) and check
for wear and damage on pump housing and gears.
(4) Re-install the gears and check clearances.
between the gear
41TE AUTOMATIC TRANSAXLE
Fig. 269 Reaction Shaft Support
1 - PUMP HOUSING
2 - REACTION SHAFT SUPPORT
3 - PUMP GEARS
teeth
Fig. 270 Oil Pump Assembly
1 - PUMP HOUSING
2 - OUTER PUMP GEAR
3 - INNER PUMP GEAR
4 - REACTION SHAFT SUPPORT
5 - SEAL RINGS (4)
6 - REACTION SHAFT
7 - CRESCENT
(5) Measure the clearance between the outer gear
and the pump pocket (Fig. 271). Clearance should be
0.089–0.202 mm (0.0035-0.0079 in.).
(6) Measure clearance between outer gear and
crescent. Clearance should be 0.060-0.298 mm
(0.0023-0.0117 in.).
(7) Measure clearance between inner gear and
crescent. Clearance should be 0.093-0.385 mm
(0.0036-0.0151 in.).
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