Cooler Bypass Valve Assembly

Cooler Bypass Valve Assembly





Special Tool(s)

Disassembly

NOTE: The cooler bypass valve (CBV) needs to be thoroughly cleaned and flushed out at this time.

NOTE: Inspect the cooler line case fittings and the sealing washers. If the cooler line case fittings or sealing washers are damaged install new cooler line case fittings and washers.

NOTE: Damaged sealing washers will cause transmission fluid to leak at the cooler bypass valve case fittings.





1. Disassemble the CBV.
1. Remove and discard the sealing washers.
2. Remove the CBV case fittings.
3. Remove and discard the sealing washers from the CBV case fittings.





2. Inspect the sealing ends of the CBV. If damage is indicated, install a new CBV.





3. Assemble the cooler bypass valve and plug the converter-out-to-cooler inlet with a 13 x 1.5 mm (0.06 inch) plug.





4. Place a 0.5-inch flatwasher over the case converter-out fitting threads over the rubber coated sealing washer.





5. Connect the cleaner pressure line to the case converter-out fitting.





6. CAUTION: Make sure the CBV is in the tank before switching on the pump. Also make sure the CBV fitting is pointing downward so the fluid does not spray up out of the tank.

Place the CBV into the tank.





7. CAUTION: The pressure must be at least 344.75 kPa (50 psi) (minimum) to overcome the valve inside the CBV and let the fluid pass through it. Do not, however, exceed 620.55 kPa (90 psi) (maximum) pressure.

Regulate the pressure as specified. Switch on the pump allowing the fluid to circulate through the CBV for 5 minutes. During this time, cycle the pump on and off to help dislodge contaminants.





8. Disconnect the cleaner pressure line from the case converter-out fitting. Remove the 0.5-inch washer.
9. Using 344.75-620.55 kPa (50-90 psi) of regulated compressed air, blow through the CBV until all the fluid is removed.





10. Remove the plug from the CBV converter-out-to-cooler inlet.

Assembly





1. CAUTION: Failure to correctly install the new rubber-coated sealing washers will result in transmission fluid leaks.

Assemble the CBV as illustrated.
1. Install new sealing washers onto the new CBV case fittings.
2. Install the new CBV case fittings with the new sealing washers onto the CBV assembly.
3. Install new sealing washers.