Scope And Sequence Of Basic Maintenance Service And Adjustment Operations - Belarus 80.1 Series Operation And Service Manual

Belarus 80.1/80.2/82.1/82.2/82Р — Operation and Service Manual
7.6. SCOPE AND SEQUENCE OF
BASIC MAINTENANCE SERVICE AND
ADJUSTMENT OPERATIONS
7.6.1. Diesel-Engine
CHANGE OF OIL IN THE DIESEL-
ENGINE CRANKCASE
When changing oil in the diesel-engine
crankcase, follow the directions as fol-
lows:
а) use in the oil sump only oil recom-
mended in this Manual, correspond-
ing to the season of operation;
b) fill in oil up to the top mark on the oil
dipstick. DO NOT run the diesel-engine
when oil level is below the lower mark
or above the upper mark on the dip-
stick; check the level not earlier than in
3-5 min. after the diesel-engine has
been stopped;
c) change oil in the diesel-engine
crankcase every 500 hours (during
scheduled MS-2).
To drain oil from the lower part of the
diesel-engine crankcase, there is a hole
stopped with a plug.
CHECKS AND ADJUSTMENT OF
CLEARANCES IN DIESEL-ENGINE
VALVES
After running-in a new tractor and every
500 hours, as well as when removing the
cylinder heads, tightening up attaching
bolts of the cylinder head and in case of
valve knocks, check and adjust valve-
and-rocker arm
scheduled MS-2).
The clearance between the rocker-arm
face and the valve stem butt-end on a
cold diesel-engine is to be adjusted with-
in 0.25...0.30 mm for exhaust and intake
valves.
To adjust, proceed as follows (see Fig.
35):
clearances (during
Section 7. Maintenance Procedures
а) remove the hood of the cylinder head
cover;
b) check the rocker arm shaft support
attachment for tightening;
c) set the first cylinder piston to the
TDC (both valve should be closed);
г) loosen lock-nut (2) of the screw on
the rocker arm of the valve to be ad-
justed and, driving screw (1) in or
out, set the required clearance be-
tween the rocker arm face and the
valve stem against feeler gauge (3).
When the clearance is set, tighten
the lock-nut and again check the
clearance with the feeler gauge, ro-
tating the shaft. The valves should
be adjusted in a sequence which
agrees with the cylinder firing order
of the diesel-engine (1-3-4-2), rotate
the crankshaft 1/2 turn more, in the
clockwise direction.
Fig. 35. Adjustment of diesel-engine valve
clearances.
87