WORKHORSE CUSTOM CHASSIS
Service Manual
2007 W Series
SECTION
7.2
PAGE
470
Automatic Transmission – Allison
2007 W Series Chassis
© 2006 Workhorse Custom Chassis — All Rights Reserved
WSM082106
3. Turn the J 35944-A water supply valve (1) to the ON
position and depress the trigger (8) to mix cooler
fl ushing solution into the water fl ow. Use the clip
provided on the handle to hold the trigger (8) down.
The discharge will foam vigorously when the solution
is introduced into the water stream.
IMPORTANT:
Flushing for approximately 2 minutes in each cooler line
Flushing for approximately 2 minutes in each cooler line
direction will result in a total of about 31-38 L (8-10 gal-
direction will result in a total of about 31-38 L (8-10 gal-
lons) of waste fluid. This mixture of water and flushing
lons) of waste fluid. This mixture of water and flushing
fluid is to be captured in a suitable container, preferably
fluid is to be captured in a suitable container, preferably
with a lid.
with a lid.
4. Flush the oil cooler and pipes with water and solution
for 2 minutes. During this fl ush, attach the shop air
supply 825 kPa (120 psi) to the fl ushing system feed
air valve (2) located on the J 35944-A for 3-5 seconds
at the end of every 15-20 second interval to create a
surging action.
5. Release the trigger (8) and turn the J 35944-A water
supply valve (1) to the OFF position.
BACK FLUSH
1. Disconnect both hoses from the oil cooler pipes and
then connect them to the opposite oil cooler pipe. This
will allow the oil cooler and pipes to be back fl ushed.
2. Repeat steps 3 and 4 of the INITIAL FLUSH
procedure.
3. Release the trigger (8) of the J 35944-A and allow
water only to rinse the oil cooler and pipes for 1
minute.
4. Turn the J 35944-A water supply valve (1) to the OFF
position and turn OFF the water supply at the faucet.
5. Attach the shop air supply to the fl ushing system feed
air valve (2) on the J 35944-A and blow out the water
from the oil cooler and pipes. Continue until no water
comes out of the discharge hose (5).
