GENERAL USE
EDOC0216
2 of 6
Rev. 1 March 15, 2002
Procedures:
CAUTION
The hoist must be properly powered and operational in order to perform the following
procedures.
WARNING
Be certain that any new or replacement Load Chain is obtained from Harrington and is
the exact size, grade and construction as required for the hoist. The Load Chain must have an odd number
of links so that both its end links have the same orientation. Destroy any damage or worn out Load Chain
to prevent its reuse.
CAUTION
When replacing load chain, check for wear on mating parts, i.e. Load Sheave, Chain
Guides and Idle Sheaves, and replace parts if necessary.
C
ONVERTING A
NER020M
INTO
NER030C:
1)
Refer to Figure 1 for steps 2 through 9.
2)
Remove the 4 Controller Cover Socket Head Bolts and allow the Control Cover Assembly to swing
fully open.
3)
Loosen the 3 captive screws holding the electrical component mounting Plate against the main
body of the hoist and swing the Plate out to access the required components.
4)
Loosen 1 of 2 Machine Screws attaching Plate A and remove the second Machine Screw. Allow
Plate A to rotate out from the retaining slot in the bottom side of the Connection Shaft.
5)
Pull out the Connection Shaft and the Hoist Fixing Shaft then remove the 2 Ton Top Hook
Assembly or Connection Yoke.
6)
Place the 3 Ton Connection Yoke on the top of the hoist. Line up the holes for the Connection
Shaft and the Hoist Fixing Shaft and reinsert the shafts.
7)
Reinstall Plate A, the Panel and Control Cover.
8)
Install the 3 Ton Top Hook (or Suspender) into the Connection Yoke using the Yoke Bolt, Slotted
Nut and Split Pin (cotter pin).
9)
Suspend the hoists from the Top Hook or Suspender.
10)
For hoists fully assembled as a NER020M with Load Chain and Chain Components:
•
Remove all chain components including the Bottom Hook Set Assembly, Stopper, Cushion
Rubber, Chain Spring(s), and End Wire (or End Suspender) from the Load Chain – Refer to
Figure 2 or 3. Inspect and replace any damaged or worn parts that will be reinstalled on the
hoist in the 3 Ton configuration.
•
Using a C-link, attach a Leader Chain (short length of Load Chain) to the end link of the Load
Chain on the load side (hook side) – Refer to Figure 4. Operate the hoist in the up direction until
the Load Chain is out of the hoist body and the Leader Chain is threaded through the hoist.
11)
So that the end links of the Load Chain are in the correct orientation, connect or re-connect the
Load Chain to the Leader Chain on the no-load side using
2
C-links. The end link of the Load Chain
should be connected so that the welded portions of the Load Chain's standing links are oriented to
the outside as they pass over the Sheave – Refer to Figure 4. Operate the hoist in the down
direction until a sufficient amount of the Load Chain is accumulated on the load side.
12)
Feed the end link on the load side of the Load Chain through the required chain components and
the bottom hook’s Idle Sheave – Refer to Figure 2 or 3. Attach the remaining chain components
to the Load Chain in their proper location as shown in Figure 2 or 3 using the 030C End Suspender
for hoists without a chain container. Connect the end link to the top Connection Yoke with the
Chain Pin, Slotted Nut and Cotter pin. Ensure that chain remains free of twists.
