Transmission Oil Pump - Disassembly

DISASSEMBLY










When disassembling the transaxle it is necessary to inspect the oil pump for wear and damage.

1. Remove the six reaction shaft support-to-pump body bolts (1).










2. Remove reaction shaft support (3) from pump body (1).










NOTE: There are two dimples on the side of the pump gears these must face up upon reassembly.

3. Remove the pump gears (2,3) and check for wear and damage on pump body (1) and gears.










4. Re-install the gears (2)(Figure 4) and check clearances.
5. Measure the clearance between the outer gear and the pump pocket (1). Clearance should be 0.065 - 0.110 mm (0.0026 - 0.0043 in.).










6. Measure clearance between outer gear (2)(Figure 5) and crescent (3). Clearance should be 0.080 - 0.145 mm (0.0032 - 0.0057 in.).










7. Measure clearance between inner gear (4) and crescent (3)(Figure 6). Clearance should be 0.122 - 0.186 mm (0.0048 - 0.0073 in.).
8. Position an appropriate piece of Plastigage across both pump gears.
9. Align the Plastigage to a flat area on the reaction shaft support housing.
10. Install the reaction shaft to the pump housing. Tighten the bolts to 27 Nm (20 ft. lbs.).
11. Remove bolts and carefully separate the housings. Measure the Plastigage following the instructions supplied.
12. The clearance should be 0.020-0.051 mm (0.0008-0.002 in.). If not replace the oil pump assembly.