PREVOST X3-45 Multiplex, Maintenance Manual

Page: 963 / 1422

Filling & Air Bleeding the TRW System (TAS Gear)
Tools Required Materials Required
5
⁄
16
"
Socket
Lbf • in. Torque wrench
Hydraulic fluid
Make sure poppets are set cor
rectly before beginning this
procedure.
1. Fill the reservoir nearly full. Do not steer. Start and
run the engine for 10 seconds, then shut it off.
Check and refill the reservoir. Repeat at least three
times, checking the reservoir each time.
Do not allow the fluid level to drop
significantly or run out of the
reservoir. This may induce air into the system.
Run engine for 10
seconds, turn off
and fill reservoir
Hydraulic fluid
Run engine for 2
minutes, turn off
and fill reservoir
Hydraulic fluid
2. Start the engine and let it idle for 2 minutes. Do not
steer. Shut off the engine and check the fluid level
in the reservoir. Refill as required.
3. Start the engine again. Steer the vehicle from full
left to full right several times. Add fluid, as neces-
sary, to the full line on the dip stick.
Automatic bleed systems should now be free from
trapped air.
Manual bleed systems continue with step 4.
Steer vehicle
Allow air to bleed
out from bleed
screw
Lbf • in. Torque
wrench
5
⁄
16
"
Socket
Auto Bleed Plug
Do Not Remove
Manual Bleed Screw
4. With engine idling, steer from full left turn to full
right turn several times. Stop steering, with the
wheels pointed straight ahead, and loosen the
manual bleed screw about one turn. Allow air and
aerated fluid to "bleed out" until only clear fluid is
seen. Close the bleed screw, refill the reservoir if
required.
Repeat step 4 three to four times until all the air is
discharged. Torque manual bleed screw to
30 lbf • in.
Do not turn steering wheel with
bleed screw loosened.
CAUTION
!
CAUTION !
CAUTION
!