Kesla XS 190, Operation & Maintenance Manual

Page: 56 / 83

Kesla
®
XS
190
SELF PROPELLED TELESCOPIC PLATFORM
55
BRAKE CYLINDER
BOOM CHAINS – ADJUSTMENT AND MAINTENANCE
INSTRUCTION FOR INSPECTION
1.
Retract the boom completely with the telescope cylinder.
2. Position of the outermost boom section: Check clearance A. See illustration on
page 56.
If clearance A is wider than 10mm +5mm (0.39in +0.196in), loosen the nuts (2) and (4) of
the extensions chain (1) and similarly tighten the nuts (2) and (4) of the retraction chain,
whereat the boom extension is moved inwards.
If clearance A is smaller than 10mm –3mm (0.39in –0.118 in), loosen the nuts (2) and (4)
of the retraction chain (2) and tighten the nuts (2) and (4) of the extraction chain (1)
After completing the adjustment, tighten locking nuts (2) holding nut (4) in place. Check
that the cotter pin (5) is intact and securely installed.
3.
The maximum permissible elongation of the chain is 2%.
3.1 Drive the boom out so that at least 2m of the chain is visible.
3.2 Count for instance 100 chain links.
3.3 Measure the length of this chain length (accuracy ± 1mm) (the chain must be
straight, not hanging, use for instance a board under the chain.)
3.4 The theoretical length of a 5/8" chain: 100 links x pitch 15.875 = 1587.5 mm
3.5
If the measured length is longer than 1620mm, the chain must be replaced.
(wear surface)
Min 1,5
0,06 in
0.06 in
Brake cylinder