SectionIV:Maintenance
4.0.MAI.SL-520X
MAST LOCK INSPECTION & ADJUSTMENT INSTRUCTIONS
All SwapLoader hook-lift hoists come with a mast lock (safety latch) assembly that is located on
the bottom side of the outer tube. When the jib is extended the mast lock then engages the
cross bar on the pivot joint, making the jib, outer tube, and pivot joint into a continuous member
for raising the container or body into a dump mode.
With the jib fully retracted the mast lock then disengages the latch bar on the pivot joint allowing
the hook-lift to enter the mount-dismount cycle by pivoting around the front pins of the pivot
joint.
INSPECTION
The mast lock assembly comes adjusted from the factory and should provide years of trouble-
free operation, however there may come a time when parts wear or become damaged and need
replaced. SwapLoader recommends that you regularly inspect all mast lock components for
damage or wear (see illustration below).
Inspect the mast lock (see illustration below); again, make sure the pivot lock prong is not bent
and there is no missing hardware. Repair or replace any missing or bent components; refer to
the mast lock (pivot lock) assembly drawing for proper part numbers and identification of the
components (see Pg. 5-5 in the Parts Section of the manual). Proper engagement of the Pivot
Lock Prong under the Front Cross Bar is 1/2” to 3/4" when the jib is extended with 1/8” to 1/4" of
clearance.
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