Minsk Tractor Works Belarus 1221.2, Disassembly-Assembly Manual

Page: 241 / 302

Disassembly-assembly manual for tractor BELARUS-1221.2/1221 В .2/1221.3/1221.4
240
Disassembly-assembly of hydraulic hoist (without dismounting it from tractor)
1) lower the hinge to extreme bottom position;
2) drain oil from body 1 of hydraulic hoist (Figure 9.1), gavong unscrewed drain conical plug 23 on
the left side of hydraulic hoist;
3) unpin pin and disconnect ropes 7 from power 43 and position 42 levers;
4) unscrew two bolts for fastening arm
а 13 to body 1 and cover 10;
5) take arm with ropes aside;
6) unscrew two bolt
а for fastening distributor to body of hydraulic hoist 1 and using mounting tool
push distributor out of body;
7) dismount cylinders by unscrewing lower nuts of hoses 3, bolts for fastening cylinders to lower
section of body 1 of hydraulic hoist;
8) unpin and remove pins 5 for fastening cylinders to left- 17 and right-side 18 swivel levers.
ATTENTION! To avoid damage of parts after dismounting both cylinders, when distributor is
installed inside body, lifting of swivel levers in zone less than 20° of vertical is not allowed.
9) unpin and remove power tie-rod 20;
10) remove shackle 25, having first removed pins 19 and 22;
11) unscrew four bolts for fastening cover 28 of power sensor;
12) remove adjusting shims 29;
13) pull power sensor assembly out of body;
14) unpin and unscrew nut 33 of power sensor;
15) remove from rod washer 32, spring 31, bushing 30 and cover 28;
16) unscrew other ten bolts for fastening cover 10 to body 1;
17) taking care not to damage spacer remove cover;
18) unscrew bolt for fastening position 42 and power 43 levers and remove levers;
19) remove cotter pin, fastening position link 38 to upper roller 41 (extreme left lever);
20) pull roller 41 out of body;
21) unscrew four bolts for fastening swivel levers 17 and 18 to swivel shaft (two for each) and
remove retainer washers 6;
22) check alignment of marks on end faces of shaft and (during factory adjustment levers could be
reinstalled and marks may not coinside; in this case use chisel put your own marks on levers) and
remove levers;
23) using screwdriver extract from openings of body 1 shells 15 with collars 16, and to avoid
damage lips of sealing collars when turning them around axis, remove them from shaft;
24) unscrew plug 26;
25) using wire hook or narrow pliers pull out figure cotter pin 34;
26) push off body lower roller 35 together with lever 21;
27) pull out power link 36, pushing it along bushing 40 inside body 1;
28) having turned shaft 44 to convenient position, unscrew two bolts for fastening position link 38
to shaft, extract it from body;
29) remove limiter 39, having unscrewed two bolts for its fastening to swivel shaft 44;
30) holding summing link 24, take swivel shaft from body and extract summing link;
31) unscrew top 40 and bottom 37 bushings.