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Page 14
Before removing the old rope, refer to reeving diagrams,
(Figures 5-12, 5-14, 5-15 and 5-17). Face the rope drum on
your hoist from the side which the rope comes off drum. To
assist with rereeving your hoist, select the reeving diagram
for your hoist. Note the description (such as 2 part double
reeved, Figure 5-17) and refer to the paragraph below with
the same description which describes rereeving procedure.
b. Removing old rope — for all reevings.
(1) Lower the bottom block to a scaffold located 6 to 7
feet below hoist to relieve tension on wire rope. (Bottom block
may be lowered to floor if desired; however, to handle less
weight and for ease of rereeving adequate scaffold below the
hoist is recommended.)
(2) Remove bottom block sheave guard.
(3) Remove key plates from both sides of sheave pin
and slide sheave pin from bottom block.
(4) Lift out sheaves from the top of the bottom block and
remove wire rope.
Figure 5-11. Removing Bolt
Securing Gearcase to Frame.
c. Check parts for wear and damage. Replace drum if there
are any signs of cracks or other damage.
5-8. ROPE INSPECTION, MAINTENANCE AND
REPLACEMENT.
a. Inspection. Wire rope on your hoist is one of the most
important components requiring frequent inspection and
maintenance. All wire ropes will eventually deteriorate to a
point where they are not safe and will require replacement.
WIRE ROPE SHOULD BE THOROUGHLY INSPECTED AT
REGULAR MONTHLY INTERVALS BY AN AUTHORIZED
PERSON AND A DETERMINATION MADE WHEN FURTHER
USE OF THE ROPE WOULD CONSTITUTE A SAFETY
HAZARD. Each inspection should include a written, dated
and signed report of rope condition. Reports should be filed
and reviewed each month and any rope deterioration carefully
noted. Inspections revealing but not limited to the following
conditions should cause the inspector to question remaining
strength of rope and consider replacement:
(1) Twelve randomly distributed broken wires in one rope
lay or four broken wires in one strand.
(2) Wear of one-third of the original diameter of outside
individual wires.
(3) Kinking, crushing or bird caging.
(4) Heat damage from any cause.
(5) Reductions from nominal diameter of more than
1/64" for 3/16", 1/4", and 5/16" diameter rope.
(6) Rope corrosion, internal or external.
(7) Effects from improper lubrication.
(8) Rope idle for month or more due to shutdown.
Special attention should be exercised when inspecting rope
normally hidden during inspecting procedures.
Wire rope improperly handled or abused can create a
SAFETY HAZARD. Read and comply with inspection,
maintenance and replacement information given herein.
WARNING
Use only factory approved rope with swagged wire
rope sockets.
WARNING
b. Maintenance. Keep rope well lubricated to help reduce
internal friction and prevent corrosion. Lubricant, as described
in paragraph 4-3, should be applied as a part of the regular
maintenance program. Special attention is required to lubricate
sections of rope over equalizing sheaves and other hidden
areas.
Avoid dragging ropes in dirt or around sharp objects which
will scrape, nick, crush or induce sharp bends in the rope.
c. Replacement. When recommended by an authorized
inspector, the rope should be replaced. Replacement rope
assemblies are shipped from the factory carefully coiled to
prevent damage by kinking. Care must be taken to avoid
twisting or kinking when uncoiling and handling during reeving.
Before replacing rope, check condition of grooves in sheaves
and drums to determine if they are excessively worn.
When first using the hoist after rope replacement, break-in
rope by operating under lighter loads to full travel before
applying maximum load.
5-9. ROPE REEVING.
a. General. Before unreeling rope from a coil or reel, be
sure floor is clean. Dirt picked up by the rope can cause
excessive wear and abrasion. Uncoil the rope by rolling the
coil or reel along the floor; or, place reel on a stand with a
shaft thru the center of reel so rope can be pulled straight out
with the reel rotating.
It is imperative that the rope reel or coil rotates as rope
unwinds. If coil or reel does not rotate, the wire will be
twisted as it is uncoiled and kinking will result. A kinked
rope may be damaged and unsafe.
CAUTION