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11.2 REPLACEMENT OF BRAKE INSERTS AND BRAKE ADJUSTING
11.2.1 Brake disassembly (fig. 6)
Demount the (crank or crank-lever) from the jack. Unbolt safety screws (6) and
consequently the nut (5). Take out the spring (4) and crank arm (7). Take out from
the hub (1) the ratchet (3) with brake insert (2A), take off the brake insert (2B), and
replace both brake inserts (2A) (2B).
Fig. 6
11.2.2 Brake assembly and adjusting (figures 6 and 7)
Proceed in the opposite way when assembling. Slip over the hub (1) the friction insert
(2B); ratchet (3) and second friction insert (2A). Set it in the crank arm (7), slide on
the spring (4) and screw on the nut (5). Tighten the nut so that the clearance in the
dent is from 4 to 6 mm (see fig. 5) and screw down the screws (6).
11.3 BEARINGS
Cast iron plain bearings are used in the product. The theoretical service life of
bearings is several times higher than the theoretical service life of the product.
Therefore, they do not need any special maintenance except for cleaning and
lubrication during the regular inspection interval, see 8.1. In the event that the
bearing is damaged during disassembly, assembly or due to dirt (sand, rock, dust ...)
entering the working space of the bearing, the bearing must be replaced immediately.
11.4 GENERAL INSTRUCTIONS
Following instructions give general important information on disassembly, check up,
repair and assembly. If the jack was dismounted from any reason act upon the
instructions as follows.
1. Perform maintenance in clean environment.
2. NEVER disassemble the jack more than it is necessary to carrying out the needful
repair.
3. NEVER use excessive power when dismantling parts.
4. NEVER use heat (fire) as the mean when dismantling parts, if the parts are
destined for next use.
5. Keep the workplace clean and without foreign materials that could get into
bearings and other movable parts.
6. If you squeeze the part in vice, use always the appropriate pads for protection of
parts surfaces.
6
5
4
7
2A
3
2B
1
16
Fig. 7
4 till 6 m m
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