Harrington Hoists and Cranes MR Trolley - (MR2) User Manual
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2 ½ Ton and 3 Ton (030L) ER2/NER 2– The standard suspension configuration uses Suspender T
which orients the hoist perpendicular to the trolley beam. Optional two-piece suspension method uses
a Connection Yoke and Suspender G, which orients the hoist parallel to the trolley beam. If the hoist is
not equipped with Suspender T or the Connection Yoke from the factory, remove the Top Hook
Assembly from the hoist and install Suspender T or the Connection Yoke as follows in step 1).
5 Ton ER2/NER2 – The standard suspension configuration uses Suspender T which orients the hoist
perpendicular to the trolley beam. Suspender G is available as an option and orients the hoist parallel
to the trolley beam. If the hoist is not equipped with Suspender T or G from the factory, remove the Top
Hook Assembly from the Connection Yoke and install the Suspender T or G as shown in Figure 3-4.
1)
Refer to Figure 3-3.
2)
Remove the four Controller Cover socket head bolts and allow the cover to swing fully open.
3)
Loosen the three or four 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 one of two 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. Pull
out the Connection Shaft and remove the Top Hook Assembly.
5)
Remove the Hoist Fixing Shaft.
6)
Place Suspender T or the 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)
Reassemble the remaining hoist components in reverse order of disassembly.
8)
If installing the Connection Yoke, place the Connection Yoke Rubber and Suspender G in the top
of the Connection Yoke. Attach Suspender G to the Connection Yoke with the Yoke Bolt, Slotted
Nut and Split Pin (cotter pin).
9)
There are two oil fill holes located in the top of the gear case on the ER2 hoist. For ER2 coupled to
MR2 trolley, there are some flange widths that make it necessary to relocate the oil cap assembly
to the other oil fill hole. This will prevent interference with trolley side plate. Refer to Figure 3-2.
8 to 20 Ton ER2/NER2 – Since the trolley suspension shaft(s) passes through the hoist top plates, no
additional hoist preparation is required to mount the ER2/NER2 hoist to the trolley. Hook mount
ER2/NER2 hoists can not be converted to lug mount without replacing the hoist's top Suspension
Plates.
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