Nexen DPC-11T 961200 - Manual (Page 5)

2 FORM NO. L-20070-F-1209
INTRODUCTION
INSTALLATION
Nexen’s DPC (Dual Friction Plate) Clutches are designed
to mount on shaft ends, or through shafts using a customer
supplied Q.D. (Quick Detachable) Bushing. The dual
friction plate design eliminates thrust loading of bearings
when the DPC Clutch is connected to a bearing supported
Flywheel, Sprocket, or Sheave.
Five components are combined to install Nexen’s DPC
Clutch, and a Pilot Mount Clutch, or as a Sheave Clutch.
The five basic components (each sold separately) are:
Pilot Clutch Assembly, Sheave, Rotary Air Union Cap, Q.
D. Bushing, and Rotary Air Union.
The inner and outer assembles of the DPC Clutch rotate
independently.
When mounted on a through shaft, the outer clutch as-
sembly rotates, and upon engagement, the inner clutch
assembly becomes the driven unit.
When mounted on a continually running shaft, the inner
clutch assembly rotates, and upon engagement, the outer
clutch assembly becomes the driven member.
Nexen recommends mounting the DPC Clutch with the
outer clutch assembly rotating continuously; taking ad-
vantage of the cooling effect of the fins to dissipate heat
generated when the clutch is engaged.
NOTE
All DPC Clutch installations require a Q.D. (Quick
Detachable) Bushing. Refer to Table 1 for Q. D.
Bushing Specifications.
SUPPORT BUSHING
NOTE
The Support Bushing provides radial load
support at the shaft, and is used when bore
sizes smaller than standard are required.
REFER TO FIGURE 1.
1. Place “DPC” Clutch, Friction Disc side down, and
support large end of Splined Hub (Item 1).
2. Insert Support Bushing into bore of Splined Hub
(Item 1).
3. Apply even pressure around the entire diameter
of the Support Bushing, and press the Support
Bushing into the Splined Hub (Item 1).
NOTE
Do not use a hammer to install Support Bushing.
Nexen recommends a small arbor press.
NOTE
On “DPC-9T” the Support Bushing fits flush
with the end of the Splined Hub.
FIGURE 1
Support
Bushing
1
TABLE 1 Q.D. Bushing Specifications
Model
Bushing
Type
Bore
Pull-up Bolt
Tightening Torque
DPC-9T SK 2.375 15 ft-lbs [20 Nm]
DPT-11T SF 2.875 10 ft-lbs [41 Nm]