Section G. Maintenance
Belarus – 90/92 Operating manual
86
Operation 17. Checking clearance
between valves and rockers
NOTE: Check clearances on cold
engine, having checked in advance the
tightness of cylinders’ head bolts
Observe the following sequence of
adjustment:
• Take off caps of cylinders’ head
covers and check fastening of rockers’
axle posts. Torque of nuts is 60.. 90
N•m (6... 9 kgf•m).
• Turn crankshaft through until timing
overlap in the first cylinder (inlet
valve starts opening, and the outlet
valve starts closing), and adjust
clearances in valves 4, 6, 7 and 8
(counting from the fan).
• To adjust clearance loosen check nut
(1) of screw (2), put probe (5) between
end face of valve rod (3) and rocker
pin(4), then screwing in or out screw (2)
set required clearance by probe.
Value of clearance between rocker pin
and end face of valve rod on cold diesel
for inlet and outlet valves is shown in the
table:
• Turn through crankshaft by 360°,
having set timing overlap in the fourth
cylinder, and adjust clearances in
valves 1, 2, 3 and 5, as shown above.
• After adjusting clearances, tighten
check nuts (1) and put removed parts
in place.
Belarus 90/92
Inlet valves
Outlet valves
0,20.. .0,35
0,20.. .0,35
https://tractormanualz.com/
