Fluid Pump: Service and Repair

DISASSEMBLY





1. Remove the 0-ring from oil pump housing.
2. Remove the five bolts and reaction shaft support from the housing.
3. Remove the oil pump drive and driven gears from the pump housing.
4. Make reassembly alignment marks on the drive and driven gears.
5. Remove the steel ball from the housing.





6. Remove the snap ring and oil seal from the oil pump drive gear.





7. Remove the two seal rings from the reaction shaft support.

INSPECTION





1. Measure the side clearance of the oil pump gear. If the clearance exceeds the standard value or if an inspection of the surface area (of the oil pump housing) that contacts the oil pump gear reveals indications of interference, replace the entire oil pump assembly.

Standard value: 0.03-0.05 mm (0.0012-0.0020 in.)

Check the surface of the reaction shaft support that contacts the oil pump gear. If there are indications of interference, replace the entire oil pump assembly.

ASSEMBLY





1. Install the oil seal to the oil pump drive gear.





2. Install the snap ring.





3. After immersing the drive and driven gears in automatic transaxle fluid install them into pump housing When using gears, install with mating marks properly aligned.
4. Fit a new 0-ring into the groove at the inner circumference of the drive gear.
5. Install the steel ball in the hole as shown in the illustration.





6. Install the two seal rings, coated with automatic transaxle fluid, to the reaction shaft support.





7. Make sure that oil pump gear turns freely.
8. Install a new 0-ring in the groove provided in the circumference of the pump housing and apply petroleum jelly to the circumference of the 0-ring.
9. Loosely install the reaction shaft support on the pump housing. Tighten the five bolts fingertight.
10. With the reaction shaft support properly positioned on the pump housing, using special tools (09452-21401, 09452-21301) tighten the five bolts to 10-12 Nm 100-120 kg.cm, 7-9 lb.ft).

Oil SEAL REPLACEMENT





1. Pry off the pump housing oil seal using a screwdriver.





2. Using the special tool (09452-21200), install the oil seal to the pump housing. Apply a thin coat of automatic transaxle fluid to the tip of the oil seal before installation.