Isuzu Trooper (1998-2002 year). Service manual — part 728
AUTOMATIC TRANSMISSION (AW30-40LE)
7A–109
241RY00006
241RY00007
241RY00008
3. Stator shaft
Remove 13 bolts, and then remove the stator shaft from oil
pump body.
Then remove drive and driven gear.
INSPECTION AND REPAIR
Make necessary correction or parts replacement if wear,
damage or any abnormal conditions are found through
inspection.
Check oil pump body bushing
Using a dial indicator, measure the inside diameter of the
oil pump body bushing.
If the inside diameter is greater than the maximum, replace
the oil pump body.
Check stator shaft bushing
Using a dial indicator, measure the inside diameter of the stator
shaft bushing.
If the inside diameter is greater than maximum, replace the
stator shaft.
mm (in.)
Maximum inside diameter
38.19 (1.5035)
mm (in.)
Maximum inside
diameter
Front side
21.58 (0.8496)
Rear side
27.08 (1.0661)
7A–110
AUTOMATIC TRANSMISSION (AW30-40LE)
241RY00009
241RY00010
241RY00011
241RY00012
Check tip clearance of both gears
Measure between the gear teeth and the cresent-shaped
part of the pump body.
If the tip clearance is greater than the maximum, replace
the drive gear, driven gear or pump body.
Check body clearance of driven gear
Push the driven gear to one side of the body.
Use a feeler gauge, measure the clearance.
If the body clearance is greater than the maximum, replace
the drive gear, driven gear or pump body.
Check side clearance of both gears
Using a steel straightedge and a feeler gauge, measure the
side clearance of both gears.
If the side clearance is greater than the maximum, replace
the drive gear, driven gear or pump body.
Check oil seal
Check for wear, damage or cracks.
If necessary, replace oil seal.
Pry off the oil seal with a screwdriver.
mm (in.)
Standard tip clearance
0.11–0.14
(0.0043–0.0055)
Maximum tip clearance
0.3 (0.012)
mm (in.)
Standard body clearance
0.07–0.15
(0.0028–0.0059)
Maximum body clearance
0.3 (0.012)
mm (in.)
Standard side clearance
0.02–0.05
(0.0008–0.0020)
Maximum side clearance
0.1 (0.004)
AUTOMATIC TRANSMISSION (AW30-40LE)
7A–111
241RY00013
Using special tool, install a new oil seal.
The oil seal end should be flush with the outer edge of the
pump body.
Oil seal installer: 5-8840-2256-0 (J-9617)
Coat the oil seal lip with multi purpose grease.
7A–112
AUTOMATIC TRANSMISSION (AW30-40LE)
REASSEMBLY
241RY00019
241RY00014
Important operations
1. Oil pump driven gear
Place the oil pump body on the torque converter.
Coat the driven gear and drive gear with ATF.
Install the driven gear and drive gear.
Reassembly steps
▲
1. Oil pump driven gear
2. Oil pump drive gear
▲
3. Stator shaft
▲
4. Oil seal ring
▲
5. O-ring
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