Nexen DFC-1650 964149 - Manual (Page 5)

FORM NO. L-20312-C-0110 5
NOTE
The Pilot Housing has a 1/2-13 UNC tapped hole on
its outside diameter. A lifting ring may be threaded
into this hole to aid in the mounting/dismounting of
the clutch.
Refer to Figures 1-3.
1. Apply a drop of Loctite ® 242 to the threads of the eight
0.500-13 x 1.500" customer supplied socket head cap
screws and lock washers; then, secure the sheave to
the clutch.
2. Alternately and evenly tighten the eight Socket Head
Cap Screws to 114 Ft. Lbs. [153.83 Nm] torque.
3. Insert the customer supplied key into the motor shaft.
NOTE
The motor shaft must be the proper size to allow
installation of the clutch onto the motor shaft. The
shaft bore of the clutch is machined to nominal motor
shaft sizes +0.001/-.0.000''. Refer to Figure 3 for
maximum and minimum motor shaft insertions.
4. Slide the clutch onto the motor shaft.
5. Apply a drop of Loctite ® 242 to the threads of the three
Set Screws (Items 24 and 33); then, insert and tighten
the three Set Screws.
NOTE
Properly align sheave and tension the belts (see belt
and sheave manufacturer tightening and alignment
specifications).
FIGURE 1
Lock Washer Socket Head
Cap Screw
Sheave
Clutch
FIGURE 2
Customer
supplied
key
Set Screw
(Items 24 and 33)
FIGURE 3
INSTALLATION
CAUTION
Failure to align the sheaves will adversely affect
clutch and motor bearing life, compromise belt
wear, and cause belt squeal and vibration which
leads to belts turning over and/or being thrown
from the drive.