Section 7. Maintenance Procedures
Belarus 80.1/80.2/82.1/82.2/82
Р — Operation and Service Manual
89
5. Checking, Adjusting the Pressure
Regulator in the Pneumatic System
Every 1000 hours of tractor operation
(MS-3), or improper operation of the
pressure regulator, as well as following its
dismantling and washing, or replacing
worn-out parts, proceed with adjustment
in the following sequence (see Fig. 73):
• connect a pressure gauge to the reser-
voir for the period of checking and reg-
ulating, with the least graduation of 0.1
...0.2 kgf/cm
2
and a scale-plate of at least
16 kgf/cm
2
;
• remove the cap (1);
• screw the cover (2) into the body right to
a stop;
• start up the diesel-engine. Turn on the
compressor and full the reservoir with
compressed air until the relief valve (6)
operates at a pressure of 8.5...10
kgf/cm
2
. Should the valve operate at a
pressure beyond these limits, adjust it
by screw (8), first loosening and, then,
tightening the locknut (7);
• gradually screwing the lid (2) out, ad-
just the compressive force of springs
(3, 4), so that the air pressure in the res-
ervoir required to open the relief valve (5)
is 7.7...8.0 kgf/cm
2
; secure the cover (2)
in this position with paint applied onto the
threaded part of the body, and put on the
cap (1);
• slightly open the valve for condensate
drain in the reservoir and bleed pres-
sure down to 6.5...7.0 kgf/cm
2
. At
these pressure values the valve (5)
should close and switch the compres-
sor over to filling the reservoir with
compressed air;
• disconnect the test pressure gauge
from the reservoir.
Fig. 73