Oil Pump

Oil Pump

AT-260 Components:

DISASSEMBLY





1. Remove seal rings (1) from oil pump assembly (2).





2. Remove bolts in the order as shown in the figure, and remove oil pump cover.





3. Remove inner gear and outer gear from oil pump housing.





4. Remove oil pump housing oil seal using a flat-bladed screwdriver.

CAUTION: Be careful not to scratch oil pump housing.

INSPECTION

Oil Pump Housing, Oil Pump Cover, Inner Gear and Outer Gear
Check for wear or damage. Replace if necessary.

Side Clearances





^ Measure side clearance of inner gear and outer gear in at least four places around each outside edge. Clearances measured values should be within the specified clearance.
Standard clearance: Refer to AT-345, "Oil Pump". Oil Pump
^ If clearance is less than standard, select inner gear and outer gear as a set so that clearance is within specifications. Refer to "Parts Information" for the inner gear and outer gear selection.
^ If clearance is more than standard, replace whole oil pump assembly except oil pump cover.





^ Measure clearance between outer gear and oil pump housing.
Standard clearance and allowable limit: Refer to AT-345, "Oil Pump". Oil Pump
^ If not within allowable limit, replace whole oil pump assembly except oil pump cover.

Seal Ring Clearance





^ Measure clearance between seal ring and ring groove.
Standard clearance and allowable limit: Refer to AT-345, "Oil Pump". Oil Pump
^ If not within allowable limit, replace oil pump cover assembly.

ASSEMBLY





1. Install oil pump housing oil seal on oil pump housing.

CAUTION:
^ Do not reuse oil pump housing oil seal.
^ Apply ATF to outer surface of oil pump housing oil seal.





2. Install inner gear and outer gear on oil pump housing.

CAUTION: Be careful with the direction of inner gear.

3. Install oil pump cover on oil pump housing.





a. Wrap masking tape around splines of oil pump cover assembly to protect seal. Position oil pump cover assembly on oil pump housing assembly, then remove masking tape.
b. Tighten oil pump cover fitting bolts in the order as shown in the figure, and then tighten them to the specified torque in the same order. Refer to "COMPONENTS".





4. Install seal rings (1) to oil pump assembly (2) carefully after packing ring groove with petroleum jelly.

CAUTION: Do not spread gap of seal rings (1) excessively while installing. The seal rings (1) may be deformed.