nifty HYBRID DC HR15N Series, Service Manual

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English 07/16
Service Manual
HR15/17N HYBRID DC
3.5 Telescopic Boom
3.5.1 Wear Pad Check (Monthly)
1) With the links and luffing boom down and the
telescope boom fully retracted, check that there
are no loose, missing, or defective components in
the superstructure end of the telescope boom.
This includes wear pads, shims, spacers and
fasteners.
2) Fully extend the telescope boom.
3) It may be necessary to raise luffing boom slightly
to avoid the platform hitting the floor.
4) Check that there are no loose, missing, or
defective components in the platform end of the
telescope boom. This includes wear pads, shims,
spacers, fasteners, wear screws and locking
nuts.
5) Check the clearance between each wear screw and the inner telescope boom section.
6) If adjustment is required, release the locking nut (1) and tighten each wear screw (2) until it makes
contact at the tightest point with the inner telescope boom section.
7) Back-off each wear screw until it no longer touches the inner telescope boom, then tighten the
locking nuts.
8) Check that the underside of the inner telescope boom section is adequately lubricated and free from
scoring or rubbing marks.
9) Lubricate if necessary use Hycote White Grease or equivalent.
3.5.2 Hose Trunking and Energy Chain Check (Weekly)
1) Examine the hose trunking and check that there are no loose, missing, or defective components.
2) Check that the hose trunking does not make contact with or “snag” on the boom structure at any
point over its range of travel.
3) With the telescope section fully extended, check that the trunking system adequately supports the
weight of the hose bundle. The upper section of aluminium trunking should be approximately parallel
with the top surface of the boom.
4) Check the condition of the energy chain, paying particular attention to the condition of the links at
both ends, as this is where the highest loads and wear rates occur. See section 4.3.1 if any links
require replacement.
5) Check that the energy chain is free from debris or any abrasive material that could cause damage to
the hydraulic hoses. Remove & dispose of any debris in accordance with local environmental
policies.
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