63
5. Assemble the tank in the reverse order. Keep it clean during assembly. When disassembling and assembling, do
not change the number of adjusting shims 11 in order to avoid dis-adjustment of the safety valve.
6. If the vehicle is equipped with a power steering pump marked "ZF...", do not disassemble the flow and safety
valves. In the event of malfunctions visit the service station of UAZ LLC or replace the pump.
Fig. 9.27 Flow control valve and safety valve of the pump:
1 -flow valve spool; 2 - safety valve spring;
3 - safety valve spring guide; 4 - safety valve ball; 5 - spool spring; 6 - safety valve seat; 7 - filter; 8 - ring; 9 - blind plug; 10 - seal
gasket;
11 - adjustable shims
Brake systems
CAUTION! Remember that when the engine is not running or a vacuum booster is failed significantly increases the
force that must be applied to the brake pedal to brake the vehicle.
CAUTION! In the event of failure of one of the brake system circuits, the brake pedal travel increases and braking
performance decreases. In this case, do not make short-term repeated presses on the pedal, but press the pedal until you
get the maximum possible effect.
In case of brake system or steering malfunction, further driving or towing the vehicle with the use of a flexible towing
coupler is prohibited. In this case, tow the vehicle with the use of partial loading or breakdown truck.
CAUTION! Brake fluid is poisonous. Store liquid in tightly closed containers Observe the following rules when
handling with liquids:
-
avoid any operations that may result in this fluid entering the oral cavity;
-
do not let dry the liquid getting onto the skin , and immediately wash it off with warm water and soap;
-
rinse spilled liquid with water, ventilate the room;
-
take off liquid contaminated clothing, dry it outside and wash it;
Operating brake system
with disc brakes on the front wheels and drum brakes on the rear wheels, with two
separate hydraulic drive circuits to them from a dual-chamber master cylinder: one to the front wheel brakes, the other to
the rear wheel brakes.
Each circuit of hydraulic drive serves as a spare brake system
.
The parking brake system
with a drum brake mechanism located behind the transfer case and acting on the rear
cardan shaft has a manual mechanical drive.
The level of brake fluid in the reservoir 14 (Fig. 9.32) is checked visually by the marks put on the body of the
reservoir, made of translucent plastic.
With the cover removed and new brake linings, the fluid level shall be
on the “MAX” mark. If the hydraulic brake is
serviceable, lowering the level of fluid in the tank is associated with wear of friction pads of brakes. Lowering the fluid
level to the “MIN” mark indirectly indicates their marginal wear. In this case, it is n
ecessary to conduct direct control over
the condition of the pads, and it is not necessary to add liquid to the reservoir, since when installing new pads, the fluid
level in the reservoir rises to normal.
The alarm lamp of the emergency level of the fluid in the reservoir lights up when the fluid level drops below the
“MIN” mark, which, with partially worn or new brake shoe linings, indicates a loss of tightness of the system and fluid
leakage. Replenish the fluid in this case only after the restoration of the tightness of the system.
CAUTION!
On vehicles equipped with ABS, ESP, when the level of brake fluid drops below “MIN” or air enters
the system, it is necessary to stop operating the vehicle and visit a service station, as brake system pumping requires
additional diagnostic equipment.
On vehicles without ABS it is necessary to pump the brake system.
Check the condition of the brake hoses. If cracks appear on the outer surface, the hoses must be replaced.
Vehicles equipped with ABS are furnished with steel pipes. If there are any signs of corrosion, the pipes must be
replaced.
