Transaxle Oil Cooler Flushing

NOTE: Use cooler flusher tool No. J-35944, or equivalent, and funnel tool No. J-35944-20, or equivalent. Do not substitute the recommended flushing solution. The use of other solutions can result in damage to the tool, components or other improper flushing of the cooler. Air supply must be equipped with a water/oil filter and must not exceed 120 psi. Excess air pressure may rupture the flushing tool or cooler, causing personal injury.

1. Fill flushing tool with 20-21 ounces of flushing solution part No. J-35944-20, or equivalent. Do not overfill.

2. Secure cap, then pressurize can to 80-120 psi.

3. Connect discharge hose to transaxle fitting end of oil cooler pipe that goes to top fitting at radiator, then clip discharge hose into drain container.

4. Mount flushing tool to undercarriage using hook provided

5. Connect hose from flushing tool to remaining oil cooler pipe, then with water valve (on flushing tool) in Off position, connect water hose from water supply to flushing tool.

6. Open water supply at faucet, then switch water valve (on flushing tool) to On position and allow water to flow through oil cooler for 10 seconds. If water does not flow through cooler, do not continue with flushing procedure; cooling system may be plugged. Excess pressure may cause personal injury. Replacement of cooler pipe and/or cooler may be necessary.

7. Switch water valve (on flushing tool) to Off position and clip discharge hose into a five gallon pail with a lid, or place a shop towel over end of discharge hose to prevent splash. Discharge will foam when solution and water mix.

8. Switch water valve (on flushing tool) to On position and depress trigger on handle. Use bale clip provided on handle to hold trigger.

9. Flush cooler for two minutes while applying air to air valve for 3-5 seconds. Apply air at 15 - 20 seconds intervals to create surging action.

10. Release trigger and switch water valve (on flushing tool) to Off position, then disconnect hoses from cooler pipes. Reverse positions and reconnect and reconnect to cooler pipes to back-flush system.

11. Repeat Steps 8 and 9, then release trigger and allow water to flow to rinse oil cooler for one minute.

12. Switch water valve (on flushing tool) to Off position, then turn off water supply at faucet.

13. Dry system with compressed air for two minutes (minimum) or until there is no moisture coming from discharge hose. Use an air chuck clip, if available.

14. Excess residual moisture may corrode cooler, pipes and damage transaxle. If Steps 14 through 18 cannot be completed at this time, use a squirt type oil can filled with transmission fluid to rinse cooler and
pipes. Connect cooler feed pipe to transaxle (top connector is feed, bottom connector is cooler return).

15. Attach discharge hose to cooler return pipe, then place into oil drain container.

16. Fill transaxle to appropriate level with transmission fluid (Dexron IIE). Start engine and allow to run for 30 seconds. A minimum of two quarts must flow through discharge hose.

17. If fluid flow is not sufficient, disconnect oil feed line at radiator, then restart engine and check flow rate. If flow rate is not sufficient, inspect oil cooler feed and transaxle for cause. If flow rate is sufficient, repeat oil cooler flushing and fluid flow check procedures. If flow is not sufficient, replace oil cooler.

18. Remove discharge hose, then connect cooler return pipe to transaxle and fill transaxle to proper fluid level as outlined.

19. Thoroughly clean flushing tool with water. Do not store tool with flushing solution in tank.