Rear Wheel Twinning - Belarus 80.1 Operation Manual

The rear wheel track with the wheels of basic configuration 15.5R38 or 18.4R34(F-
11) is changed by moving the hub together with the wheel over the axle shaft and by re-
placing the wheels from one sideboard to the other one:
To change the rear wheel track, perform the following operations:
- put the tractor on a level ground, put the stops under the front and rear wheels,
clean the dirt off the axle shafts;
- jack up the necessary axle tube;
- loosen the wheel retaining nuts and remove the wheel;
- release by three full revolutions two tie bolts 1 (figure 4.2.7) of the inserts 3 and 4
(one on each insert). The other tie bolts are to be screwed out. Remove blind plugs from
the holes for disassembly. Screw in the bolts that have been removed from the inserts into
the threaded holes for disassembly;
- if it is impossible to squeeze the inserts out by means of disassembly bolts 1, fill
kerosene or other liquid penetrant in places where inserts are detached from the hub body,
wait for some time and then screw the disassembly bolts in, while simultaneously knocking
on the hub body until the inserts fully squeeze out;
- move the hub to a required track (use table 4.2.5 to set the track "K" (figure 4.2.4)
by way of measuring the dimension "L" from the axle shaft end to the insert end face);
- screw the tie bolts out of the disassembly holes and screw them into the inserts.
Tighten the bolts with a torque of 360 to 450 Nꞏm in several stages until all bolts are tight-
ened with the required torque;
- mount the wheel on the hub, tighten the wheel-retaining nuts with a torque from
300 to 350 Nm, place back the blind plugs;
- set the track for the other wheel by analogy;
- check and tighten the tie bolts and wheel retaining nuts after the first operation
hour, then after the first eight – ten operation hours and after every consecutive 125 hours
of operation.
ATTENTION: AFTER TIGHTENING THE BOLTS MAKE SURE THE END SUR-
FACES OF THE UPPER AND LOWER INSERTS DO NOT JUT OUT WITH RESPECT TO
EACH OTHER BY A VALUE OF MORE THAN 1...2 MM!
Table 4.2.5 – Rear wheel track installation variants (bevel hubs)
Standard size of
tyres
15.5R38
18.4R34(F-11)
ATTENTION: EX-WORKS DELIVERED REAR WHEELS ARE SET TO A TRACK
UNDER THE VARIANT A (FIGURE 4.2.4)!

4.2.10 Rear wheel twinning

With an aim to improve gripping properties of the tractor when coupled with heavy
agricultural implements on soil with low bearing capacity, rear wheel twinning with use of
spacers is available.
Contact your dealer for information on the rules of rear wheel twinning and operat-
ing restrictions for the tractors with rear wheels twinned.
Variant Dimension of track
(Figure 4.2.4)
А К(А) 1400...1600
B К(B) 1800...2100
А К(А) 1500...1600
B К(B) 1800...2100
231
Mounting dimension
from the hub end face to
"K", mm the axle shaft end face
80-0000010B OM
"H", mm
119...19
183...33
69...19
183...33