Oil Pump Description; Standard Procedure - Oil Pump Volume Check - Dodge Intrepid Service Manual

21 - 124 TRANSAXLE
OIL PUMP
DESCRIPTION
The oil pump is located in the pump housing inside
the bell housing of the transaxle case. The oil pump
assembly (Fig. 326) consists of an inner and outer
gear, a housing, and a cover that also serves as the
reaction shaft support.
Fig. 326 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.
between the gear
STANDARD PROCEDURE - OIL PUMP VOLUME
CHECK
Measuring oil pump output volume will determine
if sufficient flow to the transmission oil cooler exists,
and whether or not an internal transmission failure
is present.
Verify that transmission fluid is at the proper
level. Refer to Fluid Level and Condition in this
Group. If adding fluid is necessary, fill to the proper
level with Mopar
Fluid–Type 9602). The following procedure is to
check oil pump output volume:
(1) Disconnect the To cooler line at the oil cooler
inlet and place a collecting container under the dis-
connected line (Fig. 327).
Fig. 327 Cooler Line Location
1 - FROM TRANSAXLE COOLER
2 - TO TRANSAXLE COOLER
CAUTION: With the fluid set at the proper level,
fluid collection should not exceed (1) quart or inter-
nal damage to the transmission may occur.
(2) Start engine and run at curb idle speed, with
teeth
the shift selector in neutral.
(3) If one quart of ATF is collected in 20 seconds or
less, flow is within acceptable limits. If fluid flow is
intermittent or it takes more than 20 seconds to col-
lect one quart of ATF, refer to Hydraulic Pressure
Tests in this Group.
(4) Inspect the cooler hose for damage. Replace if
necessary.
(5) Connect the To cooler hose to the oil cooler
inlet and torque clamp to 2 N·m (20 in. lbs.) torque.
(6) Refill the transaxle to proper level with
Mopar ATF+4 (Automatic Transmission Fluid–Type
9602).
ATF+4 (Automatic Transmission
LH