Harrington Hoists and Cranes MR Trolley - (MR2) - Manual (Page 11)

3.0 Pre-operational Procedures
3.1 Assembly and Adjustment
3.1.1 When the MR2 trolley is combined with a hoist, follow and complete all pre-operational procedures
provided with the hoist. For Harrington ER2 and NER2 model hoists, follow the pre-operational
procedures in the ER2/NER2 Owner's Manual in conjunction with all information provided in this
section for mounting and electrical connections.
3.1.2 In addition to the information and procedures provided in this section for the MR2 trolley, there are
specific details for using ER2 and NER2 hoists with MR2 trolleys. Special mounting and wiring
considerations must be taken if the trolley is used with a hoist other than an ER2 or NER2 model.
3.1.3

Never attempt to hook mount a hoist directly to the Suspension Shaft on trolleys
up to and including 5 Ton. These trolleys are designed to be used with a suspender only and do not
have the vertical clearance required for a hook to fit between the Suspension Shaft and trolley beam.
3.1.4 Preparing ER2 and NER2 hoists for use with MR2 trolley.
1/8 to 2 Ton ER2/NER2– 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).
2 Ton (020C) and 3 Ton (030C) ER2/NER2 – The 2 Ton and 3Ton double fall ER2/NER2 hoists
always use a Connection Yoke. 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 3-1.
2)
Remove the Shaft Retainer Clip.
3) Remove the Socket Bolt and the Shaft Retainer from the other side of the Connection Shafts.
4) Remove the two Connection Shafts.
5) Remove the Top Hook and replace it with the Suspender T.
6) Re-insert the two (2) Connection Shafts into the holes in the hoist body.
7) Re-install the Shaft Retainer Clip, Shaft Retainer and the Socket Bolt on the Connection Shafts.
8)
If installing the Connection Yoke, place the 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.
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