Chrysler PT Cruiser. Manual — part 870

OIL PUMP

DESCRIPTION

The oil pump is located in the pump housing inside

the bell housing of the transaxle case (Fig. 287). The
oil pump consists of an inner and outer gear, a hous-
ing, and a cover that also serves as the reaction shaft
support.

OPERATION

As the torque converter rotates, the converter hub

rotates the inner and outer gears. As the gears
rotate,

the

clearance

between

the

gear

teeth

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-to-pump

body bolts (Fig. 288).

(2) Remove reaction shaft support from pump

housing (Fig. 289).

Fig. 287 Oil Pump Assembly

1 - PUMP BODY
2 - OUTER GEAR
3 - INNER GEAR
4 - REACTION SHAFT SUPPORT
5 - SEAL RINGS (4)
6 - REACTION SHAFT
7 - CRESCENT

Fig. 288 Reaction Support-to-Pump Body Bolts

1 - BOLT (6)
2 - PUMP BODY
3 - REACTION SHAFT SUPPORT

Fig. 289 Reaction Shaft Support

1 - PUMP BODY
2 - PUMP GEARS
3 - REACTION SHAFT SUPPORT

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41TE AUTOMATIC TRANSAXLE

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(3) Remove the pump gears (Fig. 290) and check

for wear and damage on pump housing and gears.

(4) Re-install the gears and check clearances.
(5) Measure the clearance between the outer gear

and the pump pocket (Fig. 291). Clearance should be
0.089–0.202 mm (0.0035-0.0079 in.).

(6) Measure clearance between outer gear and

crescent (Fig. 292). Clearance should be 0.060-0.298
mm (0.0023-0.0117 in.).

(7) Measure clearance between inner gear and

crescent (Fig. 293). Clearance should be 0.093-0.385
mm (0.0036-0.0151 in.).

Fig. 290 Oil Pump Assembly

1 - PUMP BODY
2 - OUTER GEAR
3 - INNER GEAR
4 - REACTION SHAFT SUPPORT
5 - SEAL RINGS (4)
6 - REACTION SHAFT
7 - CRESCENT

Fig. 291 Measuring Outer Gear-to-Pocket

1 - FEELER GAUGE
2 - OUTER GEAR
3 - PUMP BODY

Fig. 292 Measuring Outer Gear-to-Crescent

1 - FEELER GAUGE
2 - OUTER GEAR
3 - CRESCENT
4 - INNER GEAR

Fig. 293 Measuring Inner Gear-to-Crescent

1 - FEELER GAUGE
2 - OUTER GEAR
3 - CRESCENT
4 - INNER GEAR

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OIL PUMP (Continued)

(8) Position an appropriate piece of Plastigage

across both pump gears.

(9) Align the Plastigage to a flat area on the reac-

tion shaft support housing.

(10) Install the reaction shaft to the pump housing

(Fig. 288). Tighten the bolts to 27 N·m (20 ft. lbs.).

(11) Remove bolts and carefully separate the hous-

ings. Measure the Plastigage following the instruc-
tions supplied.

(12) Clearance between both gear end faces and

the reaction shaft support should be 0.020-0.046 mm
(0.0008-0.0018 in.).

ASSEMBLY

(1) Assemble oil pump as shown in (Fig. 294).

(2) Install and torque reaction shaft support-to-oil

pump housing bolts to 28 N·m (20 ft. lbs.) torque
(Fig. 295).

PLANETARY GEARTRAIN

DESCRIPTION

The planetary geartrain is located between the

input clutch assembly and the rear of the transaxle
case. The planetary geartrain consists of two sun
gears, two planetary carriers, two annulus (ring)
gears, and one output shaft (Fig. 296).

OPERATION

The planetary geartrain utilizes two planetary gear

sets that connect the transmission input shaft to the
output shaft. Input and holding clutches drive or lock
different planetary members to change output ratio
or direction.

Fig. 294 Oil Pump Assembly

1 - PUMP BODY
2 - OUTER GEAR
3 - INNER GEAR
4 - REACTION SHAFT SUPPORT
5 - SEAL RINGS (4)
6 - REACTION SHAFT
7 - CRESCENT

Fig. 295 Reaction Support-to-Pump Body Bolts

1 - BOLT (6)
2 - PUMP BODY
3 - REACTION SHAFT SUPPORT

Fig. 296 Planetary Geartrain

1 - FRONT SUN GEAR ASSEMBLY
2 - #6 THRUST BEARING
3 - #7 THRUST BEARING
4 - REAR CARRIER/FRONT ANNULUS ASSEMBLY
5 - REAR SUN GEAR
6 - FRONT CARRIER/REAR ANNULUS ASSEMBLY

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OIL PUMP (Continued)

SEAL - OIL PUMP

REMOVAL

(1) Remove transaxle from vehicle (Refer to 21 -

TRANSMISSION/TRANSAXLE/AUTOMATIC - 41TE
- REMOVAL).

(2) Using Tool C-3981-B, remove oil pump seal

(Fig. 297).

INSTALLATION

(1) Using Tool C-4193, install oil pump seal (Fig.

298).

(2) Install transaxle to vehicle (Refer to 21 -

TRANSMISSION/TRANSAXLE/AUTOMATIC - 41TE
- INSTALLATION).

SHIFT INTERLOCK CABLE

REMOVAL

(1) Disconnect the battery negative cable.
(2) Loosen set screw and remove knob from shifter

handle (Fig. 299).

(3) Remove the center console assembly as shown

in (Fig. 300).

(4) Remove shifter bezel (Fig. 301).
(5) Disconnect the shifter/ignition interlock cable

from the shifter lever and bracket as shown in (Fig.

Fig. 297 Remove Oil Pump Seal

1 - TOOL C-3981–B
2 - OIL PUMP SEAL

Fig. 298 Install Oil Pump Seal

1 - TOOL C-4193
2 - HANDLE TOOL C-4171

Fig. 299 Gearshift Knob Removal/Installation

1 - SHIFTER KNOB
2 - SET SCREW

Fig. 300 Center Console Removal/Installation

1 - CENTER CONSOLE

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