Backflush

15. Connect hoses to the oil cooler pipes opposite from the initial flush procedures to perform a backflush.

16. Repeat steps 11 and 12.

17. Release the trigger and allow water only to rinse the oil cooler for one minute.

18. Switch the water valve on the tool to the off position and turn the water supply off at the faucet.

19. Attach air supply to the air valve located on plumbing of tool and dry the system out with air for at least two minutes or longer. If moisture is visible exiting from the oil cooler line discharge hose. Use an air chuck clip, if available, to secure the air chuck onto the air valve for ease of operation.

IMPORTANT: Excessive residual moisture can cause corrosion in the oil cooler or cooler pipes and can damage the transmission/transaxle. If steps 20 through 23 cannot be completed at this time, rinse the oil cooler and cooler pipes with transmission fluid. Complete steps 20 through 23 after reinstallation of transmission/transaxle.

20. Connect the cooler feed pipe to the transmission/transaxle (refer to Table 1 on Page 5).

21. If not already connected, attach the discharge hose to the cooler return pipe and place into an appropriate drain container.
22. After filling the transmission/transaxle with automatic transmission fluid, start the engine and run for 30 seconds. This will remove any residual moisture from the oil cooler and cooler pipes, protect all components from corrosion and check flow rate through the cooler. A minimum of two (2) quarts must be obtained during this 30 second run. If fluid flow is insufficient, check the fluid flow out of the transmission/transaxle by disconnecting the oil cooler feed line at the radiator and restarting the engine. Do the following according to flow rate:

Insufficient feed flow: Inspect the transmission/transaxle for cause.

Sufficient feed flow: Inspect oil cooler return pipe and fittings for restrictions or leaks. Repeat the check of fluid flow out the return line and if flow is still inhibited, replace the oil cooler.

23. Remove discharge hose, reconnect cooler return pipe to transmission/transaxle and refill unit to proper fluid level according to the Service Manual.

Table 1: Direction of fluid in oil cooler pipes at transmission/transaxle.

Top connector is cooler feed Bottom connector is cooler return

200/200C 200-4R

Vertical (top) connector is cooler feed Horizontal (bottom) connector is cooler return

440-T4

Top connector is cooler return Bottom connector is cooler feed

125/125C 350/350C
250/250C 400
325/325-4L 700-R4

Rear connector is cooler return Front connector is cooler feed

180C