Belarus 80.1/80.2/82.1/82.2/82
Р — Operation and Service Manual
Section 7. Maintenance Procedures
113
6. Adjustment of the Brake Valve
With the service brake controls adjust-
ment, as well as that of the brake valve
proper, completed, the adjustment of the
brake valve drive may be necessary (tie-
rod 1 and the preliminary compression
force of the spring 3, see Fig. 74).
The length of the tie-rod 1 should be ad-
justed in such a way, so that with the
brake controls released the clearance be-
tween the upper edges of slots "
а" in lev-
ers 6 and 7 and pin 5 be 1...2 mm.
A preliminary compression of the spring 3
down to a size 37 mm can be adjusted by
turning nuts 2 so that on stepping on the
clutch, first, the brake valve rod moves to
a stop, and only then the spring 3 is com-
pressed.
Pressure in the pneumatic main-line of
trailer brake control Is adjusted by rota-
tion of a nut kept under rubber boot 8.
To adjust, remove the boot 8, disconnect
the tie-rod 1 from eye-lug 9, screw the lug
out through 2...3 turns and adjust the air
pressure to at least 7,7 kgf/cm
2
. Then
screw the lug in as far as it goes and cot-
ter-pin it. Put on the boot and reconnect
the tie-rod 1.
Fig. 74