Cleaning Procedures
Tools Required- Appropriate Service Manual
- Awl
- Micro fine lapping compound
- Tapered #49 drill bit
- Pencil type magnet
- Small flat blade screwdriver
- Small non-abrasive parts cleaning brush
Cleaning And Disassembly
1. Remove the control valve assembly from the transmission/transaxle following the procedures contained in the appropriate Service Manual.
2. Inspect the attaching bolts and bolt holes. Remove metal chips or foreign material that may be present.
3. Place the control valve assembly in a clean tank and with clean solvent thoroughly wash the entire outer surfaces of the valve body.
4. Remove the control valve assembly from the solvent and dry it using compressed air.
VALVE ASSEMBLY:
5. Inspect the casting and fluid passages for foreign materials that may have accumulated in pockets. Remove the foreign material with a small screwdriver or an awl. (Refer to Figure 1)
6. As necessary, repeat the washing and drying procedures as described in Steps #3 and #4 until all foreign materials are removed.
-VALVE TRAIN:
7. While applying a slight pressure with your finger against spring force in the valve train, remove the coiled spring pin, sleeve or clip that retains the valve trains. (Refer to Figure 2)
-VALVE BODY:
8. Slowly release pressure on the valve train and remove it from the valve body. A small flat blade screwdriver may be sued to remove the bushing from the bore. (Refer to Figure 3)
DO NOT USE EXCESS FORCE TO REMOVE VALVES OR BUSHINGS
9. Place the valve train on a clean surface in the exact sequence as it was removed from the valve body. Follow the procedures in steps #7, #8 and #9 to remove all valves and bushings from the valve body. (Layout of the valves, springs and bushings on a clean, lint free towel will help to keep parts organized.)
10. Remove pressure switches, pipe plugs and T.C.C. solenoid, if applicable.
11. Clean one valve train at a time by washing the valves, springs and bushings in clean solvent and drying with compressed air.
12. Clean the valve body casting with clean solvent and dry with compressed air.