913323/CP0112 56 PRINTED IN U.S.A.
measures 10.3” (262 mm) or more, the chain should be
replaced. DO NOT repair sections of a chain. Replace
the complete chain.
Chain anchors and sheaves also require inspection, for
worn or broken fingers and worn flanges.
After any chain has been replaced, operate under
loaded conditions and re-check the torque. Adjust the
chains per the following procedure: Extend the boom
to its maximum length, then retract the boom slowly
until the chain slack allows the chain to rest on the top
of the boom. Torque the two chains on the front of the
boom to 25 ft.-lbs. (34 Nm). Lubricate with 80W-90
oil.
CHECKING BOOM SLIDE PAD WEAR
AND CLEARANCE
The boom is equipped with special nylon low-friction
slide pads between the telescopic sections (see illustra-
tion). These are pre-greased and initially worn-in at the
factory. Normally greasing is not required, except for
maintaining a light film of grease on the pad tracking
areas of the boom sections. An exception is if a boom
section has been replaced.
Visually check for loose pad bolts. The bolts are
torqued to 30 ft.-lbs. (40 Nm). If the bolts are re-
torqued at any time, Loctite® thread lock must be re-
applied to the bolts.
If the boom starts to chatter under load, grease the slide
pads and wipe off the excess grease. Maintain a clear-
ance of 1/16” between the top or side slide pads and the
boom. Shims can be added to achieve the proper clear-
ance. Loosen the bolts and insert shims until proper
clearance is obtained.
NOTE: When inserting shims in the side slide
pads, be sure to place equal shims on both sides
of the boom for even distribution of clearance.
Re-apply Loctite® 271 (red) thread lock or equivalent
to the bolts and re-torque to 30 ft.-lbs. (40 Nm).
Bottom slide pads should not be shimmed and should
be replaced when the thickness is worn down to 3/8”
(9.5 mm).
NOTE: Perform all other service requirements
up to this point as well as the following:
CHANGING TRANSMISSION OIL AND
FILTER
Operate the machine long enough to warm the trans-
mission oil to 150°-200°F (65°-93°C). Shut off the
engine. Access to filter is from under the access cover
on the front hood section. Access to the drain plug is
from underneath the machine. Proceed as follows:
1. Remove the drain plug and drain oil. Replace the
drain plug.
IMPORTANT: DO NOT discharge oil onto ground.
Catch and dispose of per local waste disposal
regulations.
2. Remove and discard the oil filter. Wipe the sealing
surface on the transmission with a clean cloth.
Apply a thin coat of clean oil to the new oil filter
gasket. Hand tighten.
3. Refill the transmission with new oil as shown in
the Lubrication chapter of this manual.
Service Every 1000 Hours or Yearly
WARNING
Failure to maintain proper slide pad clearance
and thickness could cause damage to the
boom, resulting in sudden boom failure.
Transmission
Drain Plug
Slide Pad Detail
Rear Inner
Front Outer
Pad
Shim
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