Elliott E190, Operation And Maintenance Manual

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Five Section Boom Operation-aerial EEC-0080 V1.3
Five Section Boom Operation
Properly aligned wear pad: The retainer plate holes align with the threaded holes in
the smaller boom section; the wear pad is tight against the side plate of the larger boom
section; with properly aligned/adjusted wear pads, install the capscrews and torque to
75 lb. feet (100N.m)
Improperly aligned wear pad: A gap exists between wear pad and side plate on larger
boom section; capscrews cannot be installed.
Inspect top and bottom wear pads periodically for signs of abrasion or excessive
wear. Excessive is defined as 3/16 of an inch (4.8mm) from the original pad thickness,
top rear pad thickness .75 inch (19mm), bottom front 1
st
section 1 inch (25mm), bottom
front 2
nd
and 3
rd
section .44 inch (13mm). Uneven pad wear of 3/32 inch (2mm) 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 Pad Replacement
Pad maintenance on the four or five section can be made easier by removal of the
winch. Additional clearance can be achieved on the four section by loosening the large
extend cables and removing the extend cable anchor located in the 2
nd
section.

Retract boom completely.

Remove capscrews through access holes on top rear of sections.

Remove wear pads, shims and cam plates from the rear of the boom through
open winch mount end.

Note all pad locations and tags accordingly.

Inspect pads for wear using previously mentioned inspection criteria.

Install new pads through winch mount end of boom. See top pad adjustment
procedure for proper pad and section position.

Torque retainer capscrews to 75 lb-ft (100 N.m). Failure to properly torque
capscrews will cause loss of preload, allowing pad cam to rotate and cause
excessive side clearance between sections.