4) Bleed air from clutch release cylin鄄
der
Air or oil leak in the hydraulic
pipeline of the clutch is not allowed,
or else, it can result in the disability
of the pedal尧 deficiency of the effec鄄
tive travel and incomplete release of
the clutch etc., which make the
clutch can not work normally. There
had better be two persons to do the
work of air bleeding, one person de鄄
presses the clutch pedal in the cab,
and the other one bleeds air at the
release cylinder. Tighten the air de鄄
flation screw, as the clutch pedal has
not touched the cab floor.
At first, take off cap of the air defla鄄
tion screw and connect a plastic
duct to it; connect the other end of
the duct to a container containing
brake fluid. Depress the clutch pedal
for several times to make the brake
fluid fill the master cylinder and the
hydraulic pipe, and then release the
air deflation screw; at this time if
there were air in the oil path, there
will be bubbles out of the oil ring.
Tighten the air deflation screw, as the
clutch pedal has not touched the cab
floor, and then depress the clutch
pedal for several times, keep the
pedal being depressed, release the
air deflation screw again to deflate
air. Repeat above operation until
there are no bubbles out of the brake
fluid, tighten the air deflating valve
and put on the rubber cap of the
valve. Brake fluid should be added
to the brake fluid container to max.
1尧release fork
2尧dust cover
3尧copper washer 4尧release cylinder
5尧wrench
6尧soft plastic pipe
7尧container
8尧braking
37
36
渊玉冤Clutch
1.Brief description of the struc鄄
ture
The clutch equipped to the truck of
this series is single -plate dry type
diaphragm spring clutch, and out鄄
side diameter of the driven plate is
椎275.
Adjustment of the clutch operat鄄
ing system
1) Adjust the limit screw of the clutch
pedal (right figure) to make sure that
the free play of the pedal is 3耀5mm.
2) Adjust the master cylinder of the
clutch: Loosen the locknut on the
push rod of the master cylinder, ro鄄
tate the end of the push rod to con鄄
tact gently with piston of the master
cylinder, then rotate the push rod for
3/4 circle in the contrary direction,
tighten the locknut of the push rod,
and the clearance between the push
rod and the piston is about 0.5 耀
1mm.
3) Adjust release cylinder of the
clutch (right figure) Take off the re鄄
turn spring of the release fork, push
the release cylinder piston to the
bottom of the cylinder, loosen the
locknut on the push rod, push the re鄄
lease fork towards the backside of
the engine to the position where the
release bearing and the release fork
contact barely, turn the ball nut until
it
clutch release cylinder contacts
the release fork, then turn back the
spherical nut on the push rod for 3
circles, tighten the nut, install the re鄄
turn spring of the release fork.
Clutch pedal
clutch release cylinder
HFC1045
series trucks