Fluid Pump: Service and Repair

DISASSEMBLY





1. Remove pump attaching bolts.





2. Installer Puller Set C-3752 on two bolts holes.





3. Strike the weights of the pullers against the bolt heads of the tools to loosen the pump. "Push in" on input shaft while loosening pump.





4. Remove oil pump.





5. Remove oil pump gasket.





6. Remove the oil pump O-ring.





7. Remove the six bolts, and then disassemble the pump housing and reaction shaft support.





8. Remove the oil pump outer gear and oil pump inner gear from the pump housing. If the gears are to be reused, place mating mark on the gears to ensure that the mounting direction will be correct when the gears are installed.
(Use a felt pen or similar to place the mark.)





9. Remove the four seal rings from the reaction shaft support.

REASSEMBLY





1. Install the oil pump outer gear and oil pump inner gear to the pump housing.
If reusing the old gears, install so that the mating marks that were made during disassembly are aligned.





2. Measure the side clearance between the oil pump outer gear and oil pump inner gear. If the clearance is greater than the standard value, replace the oil pump assembly
Standard value: Side clearance between oil pump outer gear and oil pump inner gear 0.020 - 0.046 mm (0.00079 - 0.00181 inch)





3. Measure the clearance between the oil pump outer gear and the pump housing pocket. If the clearance is greater than the standard value, replace oil pump assembly.
Standard value: Clearance between oil pump outer gear and pocket 0.045 - 0.141 mm (0.00177 - 0.00555 inch)





4. Assemble the pump housing and reaction shaft support, and then install them with the six bolts.





5. Place the four seal rings onto the reaction shaft support.





6. Install the oil pump O-ring.





7. Install oil pump gasket.





8. Install oil pump.





9. Install pump attaching bolts.