GROVE 11-3
CD3340B/YB4411 STRUCTURAL
11
Published 04/07/2015 Control # 569-00
Maintenance
Boom Slide Pads
See Maintenance, page 5-1 for lubrication intervals and
instructions.
Boom Chains
See Maintenance, page 5-1 for lubrication and inspection
intervals and instructions.
Adjustments
Boom Side-to-Side Adjustment
The boom side slide pads on the 1st and 2nd boom sections
are adjustable to allow for wear on the pads. Shim pads must
be placed behind the slide pads to take up excessive slack in
the side movement of the booms. When adding shims
behind the wear pads, be sure to add them only behind the
slides on the boom section to keep the sections centered.
Replace the wear pads when wear nears the bottom of the
chamfer. If the wear extends down to the bolts, damage to
the boom sections could occur.
Shims are available from your distributor.
P/N 1005522 = 1.02 mm (0.04 in)
P/N 1005475 = 1.78 mm (0.07 in)
To install the shims:
1. Extend the boom sections until the side slide pads are
visible (Figure 11-2)
NOTE: Add shims behind one slide block at a time.
2. At one slide pad, remove the two screws attaching the
slide pad to the boom section. Slide the slide pad and
existing shims, if used, out from between the boom
sections. Place additional shims behind the wear pad
and existing shims, if used. Install the wear pad and
shims between the boom sections. Install the two
screws to secure the slide pad and shim(s) to the boom
section. Longer screws may be needed.
3. Repeat step 2 for the remaining slide pads.
Boom Chain Adjustment
Lower Retract Chain
1. Completely retract the boom sections.
2. It is most likely that the chain will be loose due to chain
stretching during use. Scribe a line on the 2nd boom
section next to the 1st boom section (Figure 11-3).
3. See Figure 11-3 and loosen the jam nut on the lower
chain adjusting rod. Tighten the adjusting nut to remove
the chain slack. Tighten the chain until the 2nd boom
section just starts to move away from the 1st boom
section, then stop. This will be indicated in movement of
the scribed line on the 2nd boom section. Tighten the
jam nut against the adjusting nut. Do not overtighten the
chain.
WARNING
When lifting at high boom angles with an extended boom,
it is crucial to maintain proper side slide pad adjustment.
Visually check the lateral straightness of the boom before
raising the load. Lifting with a boom which is not visually
straight may cause boom failure and could result in injury
or death.
Reference Only
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