BELARUS-1523/1523
В
/1523.3
/1523В.3
Construction and Operation
89
The Higher-Lower Stage Selection
Mechanism of the Reduction Gear
of
the gearbox (see Figure below) is
mounted on the shifting mechanism
cover and consists of a cylinder (11)
secured on axle (12), pusher (7), and
lever (5) fixed on the spindle (4). The
pusher (7) is jointed with the lever (5)
by means of pin (6). The lever on spin-
dle (4) comes into engagement with the
dog of fork (18) (see Figure “Gearbox
(24F+12R)”) and, when the spindle
turns, shifts the synchronizing sleeve
(26). The position of the lever (5) (see
Figure below) is adjusted by changing
the pusher (7) length, with further lock-
ing it with lock-nut (8). The cylinder (11)
is connected to the hydraulic system
through an electrohydraulic valve (14).
The sensor (15) connects the valve
(14) to the electrical circuit only when
the gearshift lever is in its neutral posi-
tion. The drawn-in position of the cylin-
der (11) rod corresponds to the lower
"L" stage of the gearbox reduction gear.
Sensors (10) serve to indicate that the
reduction gear stage is engaged. For
adjusting the cylinder (11), move the
piston into the cylinder as far as it will
go. Turn the lever (5) counter-clockwise
having engaged the reducing range of
the gearbox reduction gear. Screw in
the pin (7) by 8-9 revolutions and lock
the same by means of the nut (8). Align
the holes in the lever (5) and fork (16)
nu screwing the fork (16) in or out and
lock the same with a nut. Turn the lever
(5) clockwise having engaged the
speeding-up range of the gearbox re-
duction gear. Draw out the rod of the
cylinder (11) and align the holes in the
lever (5) and those in the fork (16).
Connect the lever (5) and the fork (16)
by means of the pin; then refit the
washer and the cotter pin. Turn the (18)
in or out until the spherical part of the
bolt rests against the lever (5) and lock
the same with a nut.
1 – gearshift fork, 2 – range-shift fork, 3 – bolt, 4 – spindle, 5 – lever, 6 – pin, 7 – pusher, 8 – lock-nut, 9,
13 – oil pipelines, 10 – pressure sensor, 11 – hydraulic cylinder, 12 – axle, 14 – electrohydraulic valve, 15
– sensor; 16 – fork; 17 – bracket; 18 – adjusting screw.
Summary of Contents for 1523
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