Zetor Major 80 - Valve Clearance Adjustment

136
ADJUSTMENT
FH12N085 E752 E753
COGGED BELT TENSION
With proper cogged belt tension the
bending of belt must be 5.5 mm with
force effect of 25 N on a single belt.
Perform cogged belt tension to pre-
scribed value after releasing tightening
screws (1, 2).
COGGED BELT TENSION OF AIR-
CONDITION COMPRESSOR
With proper cogged belt tension, bending
of belt must be 7.5 mm with force effect
of 25 N on a belt.
Perform cogged belt tension to pre-
scribed value after releasing tightening
screws of air-condition compressor.
TIGHTENING HEADS OF ROLLERS
Tightening heads of engine rollers is
done with a cold engine in prescribed or-
der.
Tightening torque 160 - 180 Nm
Valve clearance 0,25 ± 0,05 mm
ADJUSTING VALVE CLEARANCE
Adjusting valve clearance is done with a
cold engine. Proper valve clearance with
suction and exhaust valves is
0.25±0.05 mm.
Alternating the movement of balance
arms:
Alternating roller
balance arms
Roller valve is
adjusted
1. 4.
3. 2.
4. 1.
2. 3.