BELARUS-1021/1021.3
Operating manual
167
Check the oil level in the FDA central gear, proceeding as follows:
- unscrew the check-filler plug (1) (Fig. 8.4.32) in one of the axle beam tubes;
- the oil level must reach the threaded hole in the plug (1);
- if necessary, add oil to the lower edge of the check-filler hole closed by the plug (1);
- install the check-filler plug (1) in place;
1 – FDA housing check-filler plug.
Fig. 8.4.32 – Check oil level in FDA central gear
Operation 38. Check/adjust clearances between valves and engine rockers
Note — Check the clearances between the valves and rockers and, as necessary, adjust
every 500 service hours, as well as after removing the cylinder head, tightening the bolts fastening
the cylinder head, and when valve hammering appears.
The clearances between the rocker striker and the valve stem end when checking on a cold
diesel engine (water and oil temperature not exceeding 60°C) must be:
1) inlet valves—
05
,
0
10
,
0
25
,
0
mm;
2) exhaust valves—
05
,
0
10
,
0
45
,
0
mm.
When adjusting the clearance between the valve stem and the rocker striker on a cold diesel
engine, set:
1) inlet valves
05
,
0
25
,
0
— mm;
2) exhaust valves—
05
,
0
45
,
0
mm.
Adjust as follows:
- remove the cap of the cylinder head cover and check fastening of the rocker shaft support;
- crank the crankshaft until the valves overlap in the first cylinder (inlet valve of the first
cylinder starts opening, and the exhaust valve ends closing), and adjust the clearances in the fourth,
sixth, seventh and eighth valves (counting from the fan), then turn the crankshaft by one revolution
causing an overlap in the fourth cylinder, and adjust the clearances in the first, second, third and
fifth valves.
To adjust the clearance, release the locknut 2 of the screw on the rocker of the adjusted
valve as per Fig. 8.4.33, and, screwing in or unscrewing the screw, set the required clearance by
the dipstick between the rocker striker and the valve stem end. After adjusting the clearance,
tighten up the locknut. After completion of valve clearance adjustment, put to place the cap of the
cylinder head cover.
