Components must be assembled in the order
shown with the friction washers seated on the
handwheel projections. Handwheel, spring wash-
er, lockwasher and nut must face as shown.
Tighten the adjuster nut hand tight, then turn
clockwise one notch. A NOTCH is turning the nut
sufficient to bring a slot in the nut and a tang of
the lockwasher in line. The next notch brings a
different slot and tang in line.
Do not bend the lockwasher tang at this time.
The Load Limiter
must
be calibrated
after assembly.
Calibration.
Install
the Load Limiter
(see Figure 11) and
hand chain but not
the handwheel
cover. Mount the
hoist where a load
greater than that
shown in Table 3
can be applied.
Connect a straight
spring scale to the
hand chain so that
a pull can be
applied in the
hoisting direction.
FIGURE 12. Load Limiter Calibration
Table 3 Minimum Hoist Loads & Pull
Hoist
Capacity
(Tons)
1/4
1/2
1
1-1/2
2
3
4
5
6
8
10
Minimum
Load
(Pounds)
650
1,300
2,600
3,900
5,200
7,800
10,400
13,000
15,600
20,800
26,000
Average Pull
To Slip Load Limiter
(Pounds)
33
67
100
113
117
118
121
106
127
133
139
With the load chain taut, apply a steady pull to
the scale to slip the handwheel one revolution
(approx. 2 ft. of hand chain travel - see Figure
12). Record several pull values and obtain the
average. Disregard the initial “break free” pull -
use only values obtained after the handwheel has
started to slip. When properly adjusted, the
average pull should be as indicated in Table 3.
If the average pull is low, turn the adjuster nut
one notch clockwise and repeat the pull opera-
tion. Do this until the correct value is obtained,
then bend the lockwasher tang into the locknut
notch. Load Limiter is now ready for service.
If the handwheel does not slip or the pull is too
high, back off the adjuster nut and start over.
After the proper calibration is obtained, install
the handwheel cover.
Bearing Retainer Screws.
Whenever the bearing
retainer screws have been removed and replaced,
they must be locked in place by prick punching the
head (see Figure 13). Always use new spots for locking.
FIGURE 13. Bearing Retainer Screw
Hoist Hanger.
The Hoist Hanger and Hoist are not
bolted together to form a rigid unit but can move
relative to each other.
When installing a new hoist hanger screw (646-234A),
tighten the screw firmly and back off one flat (1/6
turn). Then:
3 and 4 ton hoists: Install hoist hanger set screw
(646-233B).
5 to 10 ton hoists: Using the hole in the end of the
hoist hanger as a guide, drill a 0.250 to 0.256 inch
diameter hole through the hoist hanger screw and the
other side of the hoist hanger. Complete the assembly
by driving the hoist hanger screw pin (646-234D) into
hole so that the end of the pin is flush with the end of
the hoist hanger (see Figure 14).
FIGURE 14. Hoist Hanger
9
For more information contact: Sievert Crane and Hoist, (708) 771-1600, [email protected], www.sievertcrane.com
