Accumulator Pistons/Seals-C3
SPECIAL TOOLS- Lifting frame tool No. 999 5006, or equivalent
- Support rails tool No. 999 5033, or equivalent
- Lifting hook tool No. 999 5460, or equivalent
- Separator tool No. 999 5477, or equivalent
- Protective Sleeve tool No. 999 5562, or equivalent
- Mobile Jack tool No. 998 5972, or equivalent
- Tool No. 998 8670, or equivalent
- Protractor tool No. 951 2050, or equivalent
- Refer to special tool section for additional tool information. Tools and Equipment
PROCEDURE
1. Preparation
- Refer to steps 1 through 14 of Open The Control System. Service and Repair
Information At Works With Valves And Pistons
2. Sticking valves and pistons - removal
NOTE:
- Cleanliness Strict cleanliness is important.
- The control system is extremely sensitive to dirt.
- Clean the workplace and tools before commencing work.
- Never use rags, waste or paper which leave lint or threads.
- Dry and clean components with compressed air.
- If necessary to wipe with a cloth, use a chamois.
- Under no circumstances may a valve spool or piston which is sticking or seized be pried out.
Instead, tap the valve housing with a piece of wood or plastic.
- Inaccessible components may often be removed with a magnet.
3. Inspection after disassembly
- Inspect the control system for foreign particles during disassembly.
The presence of such particles often provides an indication of a transmission fault.
4. Measurement/inspection of springs
- Spring specifications may be used only to identify the springs during assembly.
For example, if the free length of a spring does not coincide exactly with the value specified in the table below, the spring is not necessarily faulty.
The acceptability or otherwise of the spring properties can be determined only with the aid of special measuring equipment.
NOTE: Always check the transmission designation and engine type when replacing control system components.
5. Preparations
- Place control system on clean workbench.
- Remove gear selector slide so that it does not fall out and become damaged.
6. Replacing accumulator piston C3
- Remove:
Cover plate and gasket. Check that gasket is intact.
Spring and modulator valve (1)
Spring and modulator valve B1 (2)
Spring and modulator valve C3 (3)
Accumulator piston C3 and spring (C3)
7. Clean and inspect valves and pistons.
- Clean all metallic components thoroughly in a suitable cleaning fluid.
Dry with compressed air or lint-free rag.
- Check that valve spools are not abraded or worn.
- Check that there are no abrasion or wear marks on the valves and that they move easily in their bores.
If necessary the valves can be carefully dressed with extremely fine emery cloth.
- Check that hole in valve (2) is clean. Blow clean with compressed air.
8. Accumulator piston and valve spring specifications
- Refer to the table above.
NOTE: Also refer to step 4
9. Replace accumulator piston seals
- Lubricate seals with ATF oil.
- Take care to ensure that seal ends are not damaged!
10. Reinstall accumulator pistons and springs.
- Reinstall valves and springs.
- Reinstall cover plate and gasket.
Tighten 6 screws to: 6.5 Nm.
CAUTION: Excessive torque may impose stress on system, causing valves to stick.
11. Finishing
- Reinstall control system.
Refer to steps 22 through 38 of Open The Control System. Service and Repair