Section 7. Maintenance Procedures
Belarus 80.1/80.2/82.1/82.2/82
Р — Operation and Service Manual
89
6. Remove lock plate (26) (see Fig.
56), screw down screws (21) as far
as they will go, to a 10 kgf force at
the spanner or pliers 100-mm long
(a 1
кгс
•
м torque), and then back off
each screw 2-2.5 turn;
7. Remove the bolt (rod) (10) (see Fig.
55), which holds the lever (11) in
the initial position ready for adjust-
ment;
8. Screw in the bolt (9), with its nose
directed into a recess in the cup
cover (7) to attain dimension «
А» =
26...29 mm;
9. Shift the lever (11) back to the
«Eng
ed
» position;
10. Install tie-rod (4); then, set the zone
of lever 1 movement within the
middle part of the slot in the control
panel, by adjusting tie-rods (4) and
(15). When the adjustment is com-
pleted, refit the lock plate (26), rear
axle hatch lid back in place; cotter-
pin the tie-rods (4) and (15) (see
Fig. 55), as well as the bolt 9. When
in field, if:
а) the P.T.O. slips;
b) the control lever 1 when shifted
abuts the front or rear edges of
the control panel slot;
c) the effort at the lever 1 exceeds
12-15 kgf (120-150 N); or
d) the lever 1 does not fix properly
in the extreme positions or une-
qual stroke of the engaged or
disengaged lever results, adjust
the band brake by means of the
external adjustment mechanism.
To do this:
1. Set the lever (11) (see Fig. 55) into
its neutral position, fix it in this posi-
tion by inserting a 8-mm dia.
М10Х60 bolt (rod) (10) into the hole
in the lever (11) and a correspond-
ing opening in the rear axle hous-
ing;
2. Screw bolt (16) out (see Fig. 56),
remove plate (17) from the splined
tail-end of axle (15);
3. Using a S = 13 mm spanner, turn
the eccentric axle (15) clockwise to
take up the clearance between the
brake band and the P.T.O. drum (to
be determined by the fact that it is
impossible to turn the P.T.O. tail-
end by hand);
4. Refit the plate (17)
на место и за-
верните болт 16;
5. Pull a stop bolt or rod from the lever
(11) (see Fig. 55).
As a result of several external adjust-
ments, the eccentric axle (15) (see Fig.
56) can take the extreme left-hand posi-
tion (the flat «
В» will be vertical, at the
left), thus, indicating that the potentiali-
ties of external adjustment have been
exhausted. In this case, set the eccentric
axle to its initial position by turning it
counterclockwise (the flat is vertical, at
the right), then proceed with the above-
said adjustment operations (for P.T.O.
assembly at the Manufacturing Works or
after repair).
When properly adjusted, the lever (1)
(see Fig. 55)
– in the «Engaged» or
«Disengaged» position
– should be at
least 30 mm away from the edge of the
slot in the control panel and smoothly
pass over the neutral position when
shifted.
Tractors in several batches may have no
mechanism of P.T.O. external adjustment
(items 15, 16, 17, see Fig. 56). In this
case, adjustment should be carried out as
specified above for adjusting the P.T.O.
controls after repair or when assembling it
at the Manufacturing Works. On tractors
equipped with a small-size cab dimension
«
Б» is 50-60 mm. The efficiency of P.T.O.
brakes and freedom from spin-out depend
only on the spring-loaded mechanism,
primarily, on the availability of free zones
for operation of the mechanism and lev-
ers related thereto. P.T.O. slippage
means that the spring-loaded mechanism