SERVICE 1400H OPERATOR AND SERVICE MANUAL
5-36 Published 10-30-2014 Control # 040-09
Properly aligned and adjusted wear pad. The holes in
the cam plate are concentric with the threaded holes in the
smaller boom section and the wear pad is tight against the
side plate of the larger boom section.
When wear pads are properly aligned and adjusted,
install capscrew and torque to 75 lb-ft (100 Nm).
Four and Five Section Top/bottom Pad
Replacement Assembled Boom
Inspect top and bottom wear pads periodically for signs
of abrasion or excessive wear. Excessive is defined as 3/16
of an inch (4,8 mm) from the original pad thickness, top rear
pad thickness 0.75 in (19 mm), bottom front 1st section 1 in
(25 mm), bottom front 2nd and 3rd section 0.44 in (13 mm).
Uneven pad wear of 3/32 in (2 mm) from side to side on the
wear pad would be considered excessive as well. If any of
these conditions exist, the top and bottom pads can be
replaced without complete disassembly of the boom.
Top Rear Pad Replacement
Pad maintenance on the four or five section can be
made easier by removal of the hoist and or removal of the
hoist mounting bar spanning the end of the 1st section.
Additional clearance can be achieved on the four section by
loosening the large extend cables and removing the extend
cable anchor located in the 2nd section.
1. Retract boom completely.
2. Remove capscrews through access holes on top rear of
sections.
3. Remove wear pads, shims, and cam plates from the rear
of the boom through open hoist mount end.
4. Note all pad locations and tag accordingly.
5. Inspect pads for wear using previously mentioned
inspection criteria.
6. Install new pads through hoist mount end of boom. See
top pad adjustment procedure for proper pad and
section position.
7. Torque retainer capscrews to 75 lb-ft (100 Nm) Failure to
properly torque capscrews will cause loss of preload,
allowing pad cam to rotate and cause excessive side
clearance between sections.
Front Bottom Pad Replacement
1. Extend boom approximately 4 ft (120 cm) out.
2. Remove cable guides and upper spacer bars from front
of boom sections
3. Loosen and remove hex nuts on retract cables on the
front of the 1st and 2nd sections
4. Using an appropriate lifting device, sling around the 4th
or 5th depending on configuration section boom and lift it
up until weight is removed from the bottom pads in the
front of the interior sections.
5. Loosen and remove the capscrews holding the pad
doubler plates in the front of the sections. Remove
plates. Remove pads from these plates. Note all pad
locations and tag accordingly.
6. Inspect pads for wear using previously mentioned
inspection criteria.
Install new pads with Teflon inserts on plates or boom
sections. Reassemble plates in boom in proper locations.
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