Part 2
REPAIR FOR COMPONENT PARTSOIL PUMP
Components
Disassembly
1. Loosen bolts in numerical order and remove oil pump cover.
2. Remove rotor, vane rings and vanes.
- Inscribe a mark on back of rotor for identification of fore-aft direction when reassembling rotor. Then remove rotor.
3. While pushing on cam ring remove pivot pin.
- Be careful not to scratch oil pump housing.
4. While holding cam ring and spring lift out cam ring spring.
- Be careful not to damage oil pump housing.
- Hold cam ring spring to prevent it from jumping.
5. Remove cam ring and cam ring spring from oil pump housing.
6. Remove pivot pin from control piston and remove control piston assembly.
7. Remove oil seal from oil pump housing.
- Be careful not to scratch oil pump housing.
Inspection
Oil Pump Cover, Rotor, Vanes, Control Piston, Side Seals, Cam Ring And Friction Ring
- Check for wear or damage.
Side Clearances
- Measure side clearances between end of oil pump housing and cam ring, rotor, vanes and control piston. Measure in at least four places along their circumferences. Maximum measured values should be within specified positions.
- Before measurement, check that friction rings, 0-ring, control piston side seals and cam ring spring are removed.
Standard clearance (Cam ring, rotor, vanes and control piston): Refer to image.
- If not within standard clearance, replace oil pump assembly except oil pump cover assembly.
Seal Ring Clearance
- Measure clearance between seal ring and ring groove.
Standard clearance: 0.10 - 0.25 mm (0.0039 - 0.0098 inch)
Wear limit: 0.25 mm (0.0098 inch)
- If not within wear limit, replace oil pump cover assembly.
Assembly
1. Drive oil seal into oil pump housing.
- Apply ATF to outer periphery and lip surface.
2. Install cam ring in oil pump housing by the following
a. Install side seal on control piston.
- Pay attention to its direction - Black surface goes toward control piston.
- Apply petroleum jelly to side seal.
b. Install control piston on oil pump.
c. Install O-ring and friction ring on cam ring.
- Apply petroleum jelly to O-ring.
d. Assemble cam ring, cam ring spring and spring seat. Install spring by pushing it against pump housing.
e. While pushing on cam ring install pivot pin.
3. Install rotor, vanes and vane rings.
- Pay attention to direction of rotor.
4. Install oil pump housing and oil pump cover.
a. Wrap masking tape around splines of oil pump cover assembly to protect seal. Position oil pump cover assembly in oil pump housing assembly, then remove masking tape.
b. Tighten bolts in a crisscross pattern.
5. Install new seal rings carefully after packing ring grooves with petroleum jelly. Press rings down into jelly to a close fit.
- Seal rings come in two different diameters. Check fit carefully in each groove.
Small diameter seal ring: No mark
Large diameter seal ring: Yellow mark in area shown by arrow
- Do not spread gap of seal ring excessively while installing. It may deform ring.
CONTROL VALVE ASSEMBLY
Components
Disassembly
1. Remove solenoids.
a. Remove torque converter clutch solenoid valve and side plate from lower body.
b. Remove O-ring from solenoid.
c. Remove line pressure solenoid valve from upper body.
d. Remove O-ring from solenoid.
e. Remove 3-unit solenoid assembly from upper body.
f. Remove O-rings from solenoids.
2. Disassemble upper and lower bodies.
a. Place upper body facedown, and remove bolts, reamer bolts and support plates.
b. Remove lower body, separator plate and separate gasket as a unit from upper body.
- Be careful not to drop pilot filter, orifice check valve, spring and steel balls.
c. Place lower body facedown, and remove separate gasket and separator plate.
d. Remove pilot filter, orifice check valve and orifice check spring.
e. Check to see that steel balls are properly positioned in upper body. Then remove them from upper body.
Inspection
Lower and Upper Bodies
- Check to see that there are pins and retainer plates i in lower body.
- Check to see that there are pins and retainer plates in upper body.
- Be careful not to lose these parts.
- Check to make sure that oil circuits are clean and free from damage.
- Check tube brackets and tube connectors for damage.
Separator Plates
- Make sure that separator plate is free of damage and not deformed and oil holes are clean.
Pilot Filter
- Check to make sure that filter is not clogged or damaged.
Torque Converter Clutch Solenoid Valve
- Check that filter is not clogged or damaged.
- Measure resistance.
Line Pressure Solenoid Valve
- Check that filter is not clogged or damaged.
- Measure resistance.
3-Unit Solenoid Assembly (Overrun Clutch Solenoid Valve and Shift Solenoid Valves A and B)
- Measure resistance of each solenoid.
A/T Fluid Temperature Sensor
- Measure resistance.
Assembly
1. Install upper and lower bodies.
a. Place oil circuit of upper body face up.
Install steel balls in their proper positions.
b. Install reamer bolts from bottom of upper body and install separate gaskets.
c. Place oil circuit of lower body face up.
Install orifice check spring, orifice check valve and pilot filter.
d. Install lower separate gaskets and separator plates on lower body.
e. Install and temporarily tighten support plates, fluid temperature sensor and tube brackets.
f. Temporarily assemble lower and upper bodies, using reamer bolt as a guide.
- Be careful not to dislocate or drop steel balls, orifice check spring, orifice check valve and pilot filter.
g. Install and temporarily tighten bolts and tube brackets in their proper locations.
2. Install solenoids.
a. Attach O-ring and install torque converter clutch solenoid valve and side plates onto lower body.
b. Attach O-rings and install 3-unit solenoids assembly onto upper body.
c. Attach O-ring and install line pressure solenoid valve onto upper body.
3. Tighten all bolts.
CONTROL VALVE UPPER BODY
Components
Disassembly
1. Remove valves at parallel pins.
- Do not use a magnetic hand.
a. Use a wire paper clip to push out parallel pins.
b. Remove parallel pins while pressing their corresponding plugs and sleeves.
- Remove plug slowly to prevent internal parts from jumping out.
c. Place mating surface of valve facedown, and remove internal parts.
- If a valve is hard to remove, place valve body facedown and lightly tap it with a soft hammer.
- Be careful not to drop or damage valves and sleeves.
2. Remove valves at retainer plates.
a. Pry out retainer plate with wire paper clip.
b. Remove retainer plates while holding spring.
c. Place mating surface of valve facedown, and remove internal parts.
- If a valve is hard to remove, lightly tap valve body with a soft hammer.
- Be careful not to drop or damage valves, sleeves, etc.
- 4-2 sequence valve and relay valve are located far back in upper body. If they are hard to remove, carefully push them out using stiff wire.
- Be careful not to scratch sliding surface of valve with wire.