Harrington Hoists and Cranes (N)ER Load Limiter - ((N)ER1) - Manual (Page 9)

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3.0 Installation
3.1 Load Limiter and Suspension Plate
3.1.1 1/8 to 3 Ton ER/NER and SNER except 030C– ER hoists used with MR trolleys standardly use
Suspender T to attach the hoist to the trolley. In this case, the low-head LL Assembly replaces suspender
T. For all other applications the hoist is suspended by either a Top Hook or Connection Yoke/Suspender.
In these cases the LL assembly is installed between the hoist body and suspension components. Install the
LL Assembly as follows:
1) Refer to Figure 3-1 .
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 fixing shaft if necessary and remove the Top Hook Assembly or Connection
Yoke.
5) Refer to Figure 3-1 and locate the LL Assembly as shown. Line up the holes (LL Assembly and
Connection Shaft holes) and re-install the Connecting Shaft. Reinstall the Hoist Fixing Shaft. Note, the
Fixing Shaft does not pass through the LL Assembly.
6) For hook mounted hoists install the Top Hook onto the Suspension Plates. For Connection
Yoke/Suspender mounted hoists, install the suspender onto the Suspension Plates. Note the
Connection Yoke is no longer required.
7) Pass the LL Cable over the hoist body on the control cover side of the suspension plate as shown in
Figure 3-1. Keep the electrical component mounting Plate free and control cover open for the
installation of the Socket Frame Holder L and to make the necessary electrical connections.
Fig. 3-1
3.1.2 3 and 5 Ton capacity codes 030C and 050L ER/NER and SNER – These applications retain the
standard suspension configuration. LL Suspension Plates and LL Connection Yokes are not required. The
LL is installed between the hoist’s Connection Yoke and the Load Chain as follows: