Century V6-173 2.8L VIN W FI (1987)
Transmission Cooler: All Technical Service Bulletins
Initial Flush and Backflush
9.
Switch the water valve on the tool to the on position and allow the water to flow through the oil cooler for 10 seconds to remove the supply of
transmission fluid in the system.
CAUTION: If water does not flow through the oil cooler (system is completely plugged) do not continue flushing procedure. Turn the water off
immediately and inspect the pipes and cooler for restriction. Replace the oil pipe(s) and/or cooler according to the service manual.
10.
Switch the water valve on the tool to the off position and clip the discharge hose onto a five gallon pail with a lid or position a shop towel over the
end of the discharge hose to prevent splash. Discharge will foam vigorously when solution is introduced into water stream.
11.
Switch the water valve on the tool to the "on" position and depress the trigger to mix flushing solution into the water flow. Use the bale clip
provided on the handle to hold the trigger down.
12.
Flush oil cooler with water and solution for two minutes. During this flush, attach the air supply to the air valve located on plumbing of tool, for 3
to 5 seconds at the end of every 15-20 second interval, to create a surging action.
CAUTION: Shop air supply must be equipped with a water/oil filter and not exceed 825 KPA (120 PSI).
13.
Release the trigger and switch the water valve on the tool to the "off" position.
14.
Disconnect both hoses from the oil cooler pipes.
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 4).
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 pipeto 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 250/250C 325/325-4L 350/350C
