BELARUS-1523/1523
В
/1523.3
/1523В.3
Construction and Operation
87
are splined to the shaft and stopped with
a check ring. The driven gear of the
synchronous PTO (31) sits on the shaft
in roller bearings (28) and (30).
The
Secondary Shaft (24)
(see Figure
“Gearbox (24F+12R)”) is installed in the
housing (1), supported in conical roller
bearings (23) and (25), the latter are ad-
justed by adjusting shims (16), while the
position of the shaft bevel gear relative
to the housing end-face (dimension 15
-
0.15
) is adjusted by the selection of ad-
justing shims (21). A driving pinion (20)
of the synchronous PTO and the FDA as
well as the synchronizer hub (26) is im-
movably fitted on the shaft. The driven
gears (17) and (19) are installed though
needle bearings; they are pressure-
lubricated through drillings in the shaft.
The gear shifting is achieved by means
of a synchronizer (26) and fork (18) fixed
on a dog. The dog is installed in the re-
cesses of the housing (1) and locked
with a ball-point lock.
The sets of parts installed on the pri-
mary, intermediate and secondary
shafts and the shaft of reduced gears
and reverse are tightened up with nuts
(12, 15, 47 and 50).
GEARBOX CONTROL MECHANISM
The gearbox control mechanism con-
sists of a gearshift mechanism and a
range-selector mechanism with an elec-
trohydraulic system for shifting into high
(H) and low (L) stages of the gearbox
reduction gear.
The
Gearshift Mechanism
is mounted
in the transmission gear assembly, the
fork box (7) (see Figure “Gearbox
(24F+12R)”) and in the control mecha-
nism cover (14).
The dogs with the first, second and fifth,
sixth gear-shift forks fitted thereon are
installed in the cover (54). The dogs are
fixed in the cover by means of ball-point
locks. The position of the forks is ad-
justed by means of tapered adjusting
screws.
Gearshift mechanism:
1 – fork; 2 – boot; 3 – sphere; 4 – spring; 5, 7 – pins; 6 – housing; 8 – cover; 9 – shaft; 11 – bolt; 12 –
bushing; 13 – cover; 14 – sunk key; 14, 20 – lever; 16 – sensor; 17 – screw; 18 – washer; 19 – check
ring.
Summary of Contents for 1523
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