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e. Installation of Load Chain.
(1) To install roller type load chain, first temporarily install
connecting link on tail end of load chain. Then, with the air off,
brake cover removed, and brake shoes locked in “open”
position (with wedge between control lever and hoist body),
turn brake wheel in “hoist” direction and feed chain in through
lever control into chain sprocket. Once chain is over sprocket,
brake cover can be replaced, hoist connected to air, and the
chain run through hoist under power until sufficient chain has
been run through to allow tail end to be attached to boss on
side of frame with chain anchor. On single reeved hoist, attach
lower block to load end of chain. On double reeved hoist, run
lower block assembly onto chain and attach load end of chain
to lug suspension bracket.
(2) When installing coil chain on the hoist, make sure the
weld on the second link faces “out” or away from the sprocket.
(See Figures 7-16 and 7-17). Now, with the air off, brake cover
removed, and brake shoes locked in “open” position (with
wedge between control lever and hoist body), turn brake wheel
in “hoist” direction and feed chain in through lever control into
chain sprocket. Continue to feed the chain through until
approximately 15" to 16" hangs through the tail chain side of
the hoist. Take the first link and swing it up (do not twist) (see
Figure 7-16) to the frame boss and fasten in place. The rest of
the chain cab be pulled through, and then the lower block
fastened in place (on single reeved hoist). On double reeved
hoist, allow approximately 17" to 18" of chain to hang on the
lifting direction side (Figure 7-17). Run the lower block assembly
onto chain and swing (do not twist) the remainder of the chain
up and attach to lug on suspension bracket. Remove wedge
from between lever and frame and replace covers.
Note: Chain must not be twisted and link welds must be
positioned as shown in Figure 7-17.
Brake Adjustment at Reassembly:
Turn screw “A” in until arms pivot on fulcrum ball to make
“C” = .010 - .015".
Checking Adjustment Without Load:
Without load, and with air turned off, open brake arms
manually, by operating limit lever, to see if brake wheel
can be turned freely by hand. If wheel refuses to turn, the
brake may not be properly adjusted. Recheck adjustment,
and then if the wheel does not turn freely, check for
possible damage, such as bent brake arms, improper lining,
brake cam slippage or other malfunctions in the unit.
Brake Adjustment With Load:
(1) With load on hook, pull “UP” control cord (or press
“UP” lever), slowly! Load must not creep down before motor
starts. Turn adjusting screw out as required.
(2) Brake must stop and hold load in both directions.
Figure 7-15. Brake Adjustments.
Figure 7-17. Installing Double Reeved Load Chain
(3/4 and 1 ton models).
11698B
Figure 7-16. Installing Single Reeved Load Chain
(1/4, 3/8 and 1/2 ton models).
11697B
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