Disassembly-assembly manual for tractor BELARUS-1221.2/1221
В
.2/1221.3/1221.4
43
f) bring under gear box (GB) body screwed support
Р
7010-00 (or identical to it) (Figure 4.6) until it
fully touches GB body;
g) to disconnect butt “GB body – RA body” remove GB cover 19 (Figure 4.1) and cover of FDA 9
to get access to bolts to be unscrewed, then unscrew ten bolts (
М
18) 17 and two nuts 11, and take
the units apart.
4.2.4 Transmission assembly
Make assembly in sequence reverse to disassembly:
а
) before assembly all parts must be clean, and worn out and damaged parts must be replaced for
serviceable ones;
b) grease friction surfaces with mineral oil used for transmission lubrication;
c) during assembly bearings must be force fitted to the end by hammerless method, with effort
transferred through the balls not allowed;
d) clean planes of bodies’ butts from spacers’ remains;
e) butting surfaces with thin layer of sealant according to specification TUU 6.10-00204234-004-
95 or mastic ABRIS according to specification RuTu 5775-004-52471462-2003. Put one cardboard
1 mm thick spacer between CC and GB bodies. Put two cardboard 0.5 mm thick spacers between
GB and RA bodies;
f) dock bodies by providing connection of slotted bushings and shafts, and seating in slots. Rotate
shafts to make connection easier.
Attention:
When docking transmission and engine, transmission shaft slots must fit slots of hubs
of clutch driven disks. Do it by rotating engine crankshaft by flywheel rim. Do not tighten
transmission with engine (for example, using elongated bolts) without making sure shaft slots fit hub
slots to avoid damaging clutch driven disks.
g) main pair gears must have identical serial number. When connecting gear box with rear axle,
move PTO clutch, torque of butt bolts tightening is from 250…300 N;
h) check and, if necessary, adjust side clearance of main pair: it must be 0.25…0.55 mm, with
side clearance oscillations no more than 0.25 for one pair. Teeth overlap must be at least 50% of
surface, with print location in the middle section of tooth or closer to cone summit. Make adjustment
by interchanging number of spacers between flanges of right-side or left-side cups without changing
total number of spacers;
i) torque when docking clutch coupling body is 400…500 N·m.
Содержание Belarus 1221.2
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Страница 203: ...Disassembly assembly manual for tractor BELARUS 1221 2 1221В 2 1221 3 1221 4 202 Figure 7 5 а ...