Fluid Pump: Service and Repair

REMOVAL
1. Remove two oil pump cover seal rings.
2. Remove oil pump cover seal (O-ring).
3. Remove 11 bolts.
4. Remove oil pump cover.

INSPECTION
1. Inspect pump body oil seal. Check for wear, damage or cracks. Replace oil seal if necessary and apply grease to its lip portion slightly when it is installed.





2. Check body clearance of driven gear. Push driven gear to one side of body. Using a feeler gauge, measure clearance between driven gear and body. If clearance exceeds its limit, replace gear.
Body clearance:
Standard: 0.07 - 0.15 mm (0.0028 - 0.0059 inch).
Limit: 0.3 mm (0.011 inch).





3. Check tip clearance of both drive and driven gears. Measure radial clearance between gear tooth and crescent. If clearance exceeds its limit, replace gear.
Tip clearance:
Standard: 0.11 - 0.14 mm (0.0044 - 0.0055 inch).
Limit : 0.3 mm (0.011 inch).





4. Check side clearance of both gears. Using a straightedge and a feeler gauge, measure side clearance between gear and pump body.
Side clearance:
Standard: 0.02 - 0.05 mm (0.0008 - 0.0019 inch).
Limit : 0.1 mm (0.0039 inch).

INSTALLATION





1. Install pump body oil seal. Use special tool (A) 09913-85210 or equivalent, and hammer to install it, and then apply grease to its lip portion.
2. Install driven gear and drive gear to pump body after applying fluid to gears.





3. Install pump cover to pump body and tighten 11 pump cover bolts to specification.
Tightening Torque (a): 8 - 12 Nm (72 - 102 inch lbs.).
4. Install two oil pump cover seal rings.
5. Apply transmission fluid to oil pump bushes and two seal rings.
6. Install cover seal (O-ring) applied with grease and make sure that it is not twisted or extruded.
7. Check drive gear for smooth rotation.