CABLE IDLER DRUM AND FOLLOWER
The main and auxiliary hoists are equipped with an
The cable follower is mounted on the forward side of
idler drum on the forward side of the hoist. The idler
its respective hoist. The cable follower applies a
drum on the main hoist is used to keep the hoist
downward spring pressure against the cable onto the
cable from coming in contact with the auxiliary hoist,
hoist drum, to ensure that the cable will be uniformly
while the idler drum on the auxiliary hoist is used to
wound onto the hoist drum, and also prevent cable
keep the hoist cable from coming in contact with the
jumping under abnormal line conditions.
Remove the two hex head bolts and washers
securing the angle to the cable follower shaft.
Loosen the adjusting nuts and remove the
Remove the angle and shim washer from the
end of the cable follower shaft and slide the roller
Remove the bolts, washers, and nuts securing
assembly off the shaft.
the lever welds to the arm weldments. Remove the
Remove the shaft bearings and the other shim
washer from the roller assembly.
Remove the bolts securing one of the side
plates, ensure the roller assembly is not dropped
Cleaning and Inspection.
when the side plate is removed.
Clean all grease from the shafts and bearings.
Remove the bolts and washers securing the
side plates to the hoist, and lift the idler drum
Check the inner shafts, the rollers, and the
assembly from the crane.
shaft bearings for cracks, scoring, or grooving.
Replace if necessary.
Check the spring tension. If the springs will not
provide sufficient tension when adjusted, replace
The idler drum and cable follower should
be disassembled in a clean work area.
Remove the hex head bolt, lockwasher, and
Install the inner shaft bearings into the roller
end cap securing the idler shaft to the side plate.
Remove and lay the side plate aside.
Install one shim washer on the inner shaft.
Remove the idler shaft from the drum
Install the roller assembly on the inner shaft
and install a shim washer on the end.
Remove the remaining side plate and lay
Ensure the roller assembly and bearings are
fully seated and install the angle iron on the end of
the inner shaft.
Remove the bearings from the drum assembly.