Stellar
®
Heavy-Duty Telescopic Crane Owner’s Manual | Page 37
Refer to winch manual supplied with crane.
Winch Maintenance
While operating the crane, extend and retract the extension booms If the extension weldments are
noisy during operation, it is necessary to lubricate the booms. Stellar
®
Model Cranes feature a metal
coating which will require an aerosol lubricant. Stellar Industries recommends aerosol style lubricant
Stellar PN 44512.
Extension Boom Maintenance
Fully extend a load (65-70% of crane’s rated capacity) at a boom angle of approximately 60º.
With the load at 3-5 inches off the ground, use a tape measure to mark the load from a specic
at/level spot on the ground (Note: Use a board/pad if necessary). Also at this time, use a grease
pen to make a temporary mark on the main cylinder rod and another mark on the winch drum in
reference to the housing. Finally, measure the stabilizer legs from the ground.
After waiting ve minutes, measure the load from the same specic spot on the ground. If the load
movement is within 1/4”, the test has passed. If the load has moved more than 1/4”, wait another
ve minutes and re-measure. If the load continues to move, check the other marks (main cylinder
rod, winch drum) and re-measure the stabilizers to narrow down the potential drifting issue. Please
refer to the troubleshooting section at the end of this manual for further detailed instructions.
Load Hold Test Procedure
Courtesy of CraneMarket.com
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