Western Star 47X 2020, Руководство по обслуживанию

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3. Remove the reservoir lid (see Fig. 3 ) and install
the pressure bleed adaptor on the reservoir.
4. Bleed the hydraulic system as follows.
4.1 Open the bleed valve on the bleed tank
to pressurize the reservoir.
4.2 Remove the cap from the bleed valve of
the slave cylinder. See
Fig. 4 . On the
valve, install a transparent drain hose
connected to a catch bottle. The hose
needs to fit the bleed valve tight enough
so it does not fall off when fluid is
pumped out.
4.3 Open the bleed valve on the slave cylin-
der.
4.4 When the draining fluid is clear and free
of air bubbles, close the bleed valve.
5. Check the fluid level in the reservoir. If neces-
sary, add or drain fluid to bring the fluid level to
between the MIN and MAX lines marked on the
side of the reservoir.
6. Install the reservoir lid.
7. Disconnect the transparent hose. Tighten the
bleed screw 88 lbf·in (994 N·cm) and install the
cap on the slave cylinder bleed valve.
8. Depress the clutch pedal a few times. There
should be resistance over the full pedal stroke.
Manual Bleeding
1. Park the vehicle on a level surface, shut down
the engine, and set the parking brake. Chock the
tires and open the hood.
NOTE: The hydraulic system holds approxi-
mately 0.5 quart (0.5 liter) of fluid. It may need
to be refilled during the bleeding process to pre-
vent air from re-entering the system.
2. Remove the reservoir lid and fill the reservoir
(see
Fig. 3 ) with new DOT 4 brake fluid from a
tightly sealed container.
3. Remove the cap from the bleed valve of the
slave cylinder. See
Fig. 4 . On the valve, install a
transparent drain hose connected to a catch
bottle. The hose needs to fit the bleed valve tight
enough so it does not fall off when fluid is
pumped out.
NOTE: The following steps require two people,
one in the cab to work the clutch pedal, and one
to open and close the bleed valve and watch
the fluid.
4. Bleed the system, as follows.
4.1 Open the bleed valve.
4.2 Depress the clutch pedal until it stops.
4.3 Close the bleed valve.
4.4 Return the pedal to the upper position.
4.5 Repeat the previous steps until the fluid is
clear and free of air bubbles.
4.6 Depress the clutch pedal. There should
be resistance over the full pedal stroke.
5. Check the fluid level in the reservoir. If neces-
sary, add or drain fluid to bring the fluid level to
between the MIN and MAX lines marked on the
side of the reservoir. Install the reservoir lid.
6. Disconnect the transparent hose. Tighten the
bleed valve 88 lbf·in (994 N·cm) and install the
cap on the slave cylinder bleed valve.
11/30/2010 f250682
1
2
1. Bleed Valve 2. Slave Cylinder
Fig. 4, Slave Cylinder, Hydraulic Clutch Control
Clutch
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47X and 49X Maintenance Manual, August 2020
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