Milwaukee Tool 9672-20 - Manual (Page 7)

page 7
WARNING!
To reduce the risk of injury, do not use any grease or
lubricant on braking surfaces. The brake is designed
to operate dry. Using any grease or lubricant on the
braking surfaces will cause brake slippage and loss
of load control which may result in injury and/or
property damage.
The brake is designed to operate dry. Do not use any grease or lubricant
on the braking surfaces. When lubricating parts adjacent to the brake,
do not use an excessive amount of lubricant which could seep onto the
brake surfaces.
When the hoist is disassembled for periodic inspections, check the
pawl for free movement and apply a light coat of spray lubricant such
as WD-40 (WD-40 Co.) or equivalent, to the pawl stud. When the hoist is
disassembled for cleaning or repairs, the following locations should be
lubricated using approximately 1 oz. (29.5ml) per hoist of Extreme Pres-
sure Grease such as Molykote BR-2-S (Dow Corning Corp.) or equivalent:
Threads of handwheel, gears, liftwheel rollers, gear bearing roll-
ers, journals of chain guide and dead end pin, sheave wheel rollers
(3 and 5 ton), hook bearing balls (3 and 5 ton), hook collar journals
(3 and 5 ton) and dead end stud (3 and 5 ton).
NOTE: To assure extra long life and top performance, be sure to lubri-
cate the various parts of the hoist using the lubricants specified.
Assembly
Particular attention must be given to the following when assembling the
hoist:
1. Assemble the brake components as shown in Fig. 6. The ratchet teeth
must face as shown and engage the pawl. Do not lubricate the brake
surfaces. The brake operates dry. Assemble handwheel to pinion shaft
and turn handwheel to seat brake components. Assemble the pinion
shaft nut to the shaft until the nut bottoms. Then back nut off at least
one but not more than two flats. Insert cotter pin and bend ends to
secure same.
2. The intermediate gears have timing marks (letter "O" stamped on one
tooth). The gears must be assembled with these marks orientated as
shown in Fig. 7.
1. Attach approximately 20" (508 mm) of soft wire to the loose end of
the chain. Pass the wire over the top of the liftwheel and down
between the liftwheel and the chain guide.
2. Position the chain so that the first, as well as the third link stands on
edge with the weld away from the liftwheel and the second link lays
flat on the liftwheel.
3. After the chain has been started, pull hand chain in the hoisting
direction until about 2 feet (0.6 M) of chain has passed over the
liftwheel. The wire should now be removed from the chain.
4. Remove the cotter pin from the loose end pin and slide the loose end
pin to the side into the gear housing, leaving approximately 1/2"
(12.7 mm) of the pin protruding from the geared side plate.
5. Loop the chain making sure there are no twists up to the loose end
pin and slide the pin through the last link of the chain. Slide the loose
end pin into the hole in the handwheel side plate until the cotter pin
hole is visible.
6. Secure the loose end pin by reinstalling the cotter pin and spreading
the legs of the cotter pin.
Ratchet
Friction
hub
Friction
washer
*Pawl Ratchet
*1/2 ton hoist has 2 pawls set 180° apart
Fig. 6
3. For proper operation, the correct number of rollers must be installed
at the rotating points of the liftwheel, intermediate gears and hook
block sheave (3 and 5 ton). The correct number of bearing balls
must be installed in the hook collar to retain the hook and insure
proper loading. Refer to Fig. 3 for the correct number of bearing
balls/rollers at these locations. Applying an Extreme Pressure grease
such as Molykote BR-2-S (Dow Corning Corp.) or equivalent to the
rollers or bearing balls will help hold them in position during assem-
bly.
4. When assembling the latch to the hook, the end of the rivet must be
peened over. When peening over the rivet, apply only enough force
to form the head and retain the rivet. Excessive force will deform the
latch and make the latch inoperable.
Reeving Load Chain
1/2, 1, 2, 3 and 5 Ton Hand Chain Hoists
Chain guide
Loose end pin
Liftwheel
Fig. 8
WARNING!
To reduce the risk of injury, feed load chain
between liftwheel and chain guide before attach-
ing it to the loose end pin. Failure to properly
install the load chain may cause the chain to lift
out of the liftwheel pockets and allow the load to
drop.
Intermediate gear
Timing marks
Fig. 7