The following procedure is used to
inspect channel and plate trapezoidal
Boom width, height, squareness,
ensures proper component clearance
and freedom from physical contact
convexity, and waviness are checked
at the factory prior to boom
assembly. Boom damage resulting
from overloading or other misuse of
2. INSPECT CHANNEL AND PLATE TRAPEZOIDAL
the crane would be evidenced by
binding between the boom sections.
Should this occur, the boom should
a. Check width of boom by measuring across
be disassembled and inspected to
boom plate. This check shall be made at front
determine the source of binding and
and rear end and several places along boom
the extent of damage. Contact Grove
Manufacturing Company, Service
Department, concerning possible
b. Check height of boom by placing straightedge
repair or replacement of affected
and square as shown in A. Measure between
the edge of square and straight edge, both
sides, at 4 foot intervals, maximum.
1. MANUALLY INSPECT BOOM OPERATION.
a. Elevate boom and hold in extended position.
Boom should stay in position until retracted by
b. Extend and retract boom several times at
various elevations. Check for smooth operation
of telescope cylinder.
c. Check operation of all electrical/electronic
A. CHECKING HEIGHT OF BOOM
components affected by boom removal.
1. STRAIGHT EDGE
d. Visually inspect telescoping section for adequate
lubrication of boom plates. Observe extended
section for evidence of cracks, warping, or other
damage. Periodically check security of boom
wear pads. Check boom nose sheave for
security and freedom of movement.