Yale Lift-Tech SHAW-BOX, Operation, Service & Parts Manual

Page 15

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 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 birdcaging.

(4) Heat damage from any cause.

(5) Reductions from nominal diameter of more than

(a) 1/64" for 3/16", 1/4", and 5/16" diameter rope.
(b) 1/32" for 3/8" and 7/16" diameter rope.
(c) 3/64" for 9/16" 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.

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.

Use only factory approved rope with swagged wire
rope sockets.

WARNING

Before removing the old rope, refer to reeving diagrams, Figure
5-8. 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 3 part double reeved, Figure 5-8, 

$

) and refer to 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.

(5) Remove key plates or snap rings from upper block

sheave(s) and slide out upper block sheave pins,
releasing upper block sheaves. Remove wire rope
from sheaves.

(6) Make certain all personnel are clear of hoist and

operate hoist “DOWN” to completely unwind all wire
rope from drum. Stop hoist so drum anchor slot(s) is
accessible. Remove live rope end socket(s) from drum.

(7) TURN OFF POWER TO HOIST.

(8) Open electrical compartment cover on single reeved

hoists to remove dead end socket.

Remove cotter pin from socket, slide rope toward socket
until rope end fitting clears socket. Lift out rope and end
fitting through groove provided. Remove old rope. Close
electrical compartment cover.

c. Installing new rope.

It is imperative that rope reel or coil rotate 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 for maximum service.

CAUTION

When first using hoist after rope replacement, break in rope by
operating under lighter loads to full travel before applying
maximum load.

Winding rope on rope drums with power can be
hazardous. Keep hands safe distance from drum, wear
gloves and use extreme care when winding rope.

WARNING

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 stand
with shaft thru center of reel so rope can be pulled straight
out with reel rotating.