The 126 foot boom installed on this machine must be kept in
proper alignment and adjusted as required. Boom lubrica-
tion intervals should also be used to inspect boom align-
ment. Should adjustment be necessary use the following
procedure:
1. With the boom retracted and level, remove the top covers
on the base section. If pads “C”, “G”, and “K” are in-
stalled remove the shims. If pads “B”, “F”, and “J” are
installed, loosen the capscrews . The retaining bolts and
eccentrics at pads “A”, “E”, and “I” are to be backed off
to enable aligning the boom sections later.
2. With the boom still retracted adjust the cast iron blocks
“D”, “H”, and “L” to center the boom sections at the
front and allow approximately 1/16 to 1/8 inch clearance
on each side between the cast padr and the boom section.
3. Lubricate pads “A”, “C”, “E”, “G”, “I”, and “K” and ex-
tend the boom.
4. Visually align #2 boom section with base section by shim-
ming pad “B” on either side to bring the #2 section into
alignment. Check the alignment of the #2 section by run-
ning a string along the top of the base and #2 section as
shown below. Shim and install the other pad “B” to a 1/
32 inch clearance between the pad surface and the #2
boom section.
SERVICE & ADJUSTMENTS
6 - 8
I
K
L
J
H
F
E
G
C
A
B
D
# 4
# 3
# 2
BASE SECTION
STRING
TOP BOOM PLATE
BOOM ADJUSTMENT
CHECKING FOR PROPER ALIGNMENT
Issued: August 2003RT700 Series
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