Schematic diagram hydrostatic
brake system
Note When Use Brake Fluid
1. The specified brake fluid of this
series truck is synthetic brake fluid of
class JG3 (GB10830).
2. Never use mixed brake fluid.
3. Synthetic brake fluid is good at
sopping up. They should be storage
in a clean sealed dry container, keep
away from water, organic solvent,
petroleum, and dust. Otherwise the
vehicle's capability of brake would
be cut down seriously.
4. Clean system with alcohol before
replacing brake fluid with different
brand. Following these if alcohol is
unavailable.
渊1冤 After drain all old brake fluid, fill
reservoir with new fluid near to the
opening and bleed system again, in
order to sweep old fluid away.
渊2冤 Fill system with brake fluid.
5. Brake pedal's free play should be
5 ~8mm after adjusted, or it will
cause main booster work abnormally
and make brake drum over hot.
Running brake
1. General Structure
The running brake is hydraulic drum,
both front and rear are two leading
shoe brake. It is composed of bottom
plate, wheel cylinder, brake shoe set
with pad, and return spring set.
2. Adjustment of Running Brake
The clearance between pad and
drum will be bigger and bigger due
to wear. In order to ensure brake
work well, adjust it regularly follow
these steps.
Jack up the wheel which you want to
adjust and remove the seal plug. Dial
1尧 brake pedal 2尧vacuum booster
and main cylinder assembly
3尧reservoir
4尧 connection hose
5尧rear brake 6尧vacuum cylinder
7尧intake manifold 8尧front brake
9尧 vacuum check valve
10尧connect to vacuum-alarm
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要要
要hydraulic tube
vacuum tube
HFC1020
series trucks
the adjusting gear of wheel cylinder
piston accord the arrow near the ad鄄
justing hole on bottom plate that with
special adjusting screw and at the
same time rotate the brake drum until
the drum can not rotated by hands.
Then rotate the adjusting gear back
for 5 ~9 teeth, keep the pad 0.2 ~
0.45mm away from the drum, so that
the drum can rotate freely again.
3. Use & Check
Replace the pad which is worn out or
damaged. Before installed, the new
pad should be ground. Make sure
that the new pad has not oil coat, al鄄
so has not crack and chap and other
flaw.
The clearance should be adjusted in
every time of maintenance. Check
drums with hands for temperature ev鄄
ery time you park, adjust the clear鄄
ance if the temperature is too high.
Check wheel cylinders for leak, and
replace the leather gasket if leak is
detected. Protect drums from being
wrong result from over heat and oth鄄
er reasons.
Vacuum booster
1. General Structure
Booster of this series truck is dual
diaphragm vacuum booster, which is
composed of return spring, control
valve, rubber diaphragm, noise elim鄄
ination board, and so on.
2. Adjustment
Booster have been adjusted in fac鄄
tory, don't disassemble it and protect
the diaphragm from been damaged.
Wheel & Spare wheel riser
Wheel
1. General
Every truck has seven wheels, one of
which is spare and mounted under鄄
neath rear frame. One kind of tire
whose specified pressure is 460 ~
490Kpa is 6.50-15 type..
2. Use & Check
In order to use for a longer time,
please charge tire according to
specified pressure value. Never drive
when pressure is insufficient. It is
normal that pressure increases dur鄄
ing the travel, and don't try to reduce
it by deflating. Check the tire pres鄄
sure when tire is not hot. If the two
center patterns on tire tread touch a鄄
gainst ground under fully loaded, the
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