15
EC3-680-3 February 2017
Order # 5041558-0 & 5041679-0
5-5. CHAIN REPLACEMENT
(OLD CHAIN STILL IN HOIST)
Refer to Figure 5-5, Chaining Diagrams, and proceed as follows:
a. Run the load block up to its top limit.
b. DISCONNECT PO\VER from the hoist and remove the short
end cover.
c. With a screwdriver, push the spring guide plate (No 1. Figure
5-1) out of the slots in the limit switch nuts. Tum the brass
slotted nut ( 2) back to about the cen ter of the threaded
screw DO NOT DISCONNECT THE WIRES FROM THE LIMIT
SWITCHES.
d. Remove the load hook assembly from the old chain.
e. Make a “C”-shaped chain link by grinding through one side of
the end link of either the old or new chain. See Figure 5-4.
f. Hook the special “C” link to the end link of both chains thus
joining them. BE SURE the welds of the upstanding links of the
new chain are out away from the load sheave. and that proper
orientation is observed for attachment of the slack end in
paragraph j. below.
g. With the end cover off, connect the hoist to power supply. Be
sure the green ground wire is properly grounded.
h. Carefully jog the “UP’” button and run the joined pieces of
chain into the hoist until about 12 inches of the new chain
comes out the other side.
i. DISCONNECT POWER from the hoist.
All standard top suspensions will be marked with a letter. Hoist
center sections have each tapped mounting hole marked by a cast-
in number. In order to obtain proper alignment of the top suspension
with the load block, letters and numbers must be placed adjacent to
each other according to the following table. When specified, spacers
are used between the suspension and the hoist frame. See Section
5-4 for suspension change procedure.
Top
Suspension
Hoist Capacity
Suspension
Letter
Hoist
Number
Spacer
Length
Swivel or Rigid Hook
1, 2 Ton
A
3
None
3 or 4 Ton
A
8
None
3-5/8" Square Box
With Plain Trolley or
Parallel Mount
Motorized Trolley
1, 2 Ton
B
9
None
3 Ton
B
2
None
3-5/8" Square Box
With Cross Mount
Motorized Trolley
1, 2 Ton
B
9
11/16"
3 Ton
B
2
11/16"
7” Square Box With
Trolley
4 Ton
C
3
None
5 Ton
D
5
None
8 Wheel Plain Trolley
4 Ton
B
2
11/16"
5 Ton
D
5
11/16"
8 Wheel Motorized
Trolley
4 Ton
B
2
1 3/4"
5 Ton
D
5
13/4"
FIGURE 5-3. TOP SUSPENSION ORIENTATION
