913287/BP0808 60 PRINTED IN U.S.A.
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 chains on the front of the
boom to 30 ft.-lbs. (40 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. If a top or side slide pad
shows excessive wear, loosen the bolts and insert
shims to each side or top and bottom for even distribu-
tion of clearance. Re-apply Loctite
®
thread lock to the
bolts and re-torque to 30 ft.-lbs. (40 Nm). Bottom slide
pads should be replaced when their thickness is worn
down to 3/8” (9.5 mm).
CHECKING PERSONNEL WORK
PLATFORM (PWP) SYSTEM
Follow the procedure for checking the PWP System
outlined on pages 54-55.
NOTE: Perform all other service requirements up
to this point, as well as the following:
CHANGE TRANSMISSION OIL AND
FILTER
Operate the machine long enough to warm up the
transmission oil. Shut off the engine. Access to filter
and drain plug is from underneath the machine.
Proceed as follows:
Service Every 1000 Hours or Yearly
Two Front
Boom Chains
One Rear
Boom Chain
Outer
Section
1st Intermediate
Section
Inner
Section
2nd Intermediate
Section
Chain Hookup Detail
Four-Section Boom
One Front
Boom Chain
WARNING
Failure to maintain proper slide pad clearance
and thickness could cause damage to the
boom, resulting in sudden boom failure.
Slide Pad Detail
Rear Inner
Shim
Pad
Front
Outer
Transmission
Drain Plug
Transmission
Filter
Courtesy of Crane.Market
To Next Page
Loading...
Need help?
General
