(8)
Refer to Figure 9. Place a straightedge across the two adjacent bushings and measure the
distance from the bushings to the mounting face of the generator fan housing. Slide the coupling
assembly on the shaft until this dimension is 1/16-inch (1.6 mm)
LESS
than the dimension
recorded in step 7 above. The tapered hub will be pulled onto the split bushing 1/16-inch (1.6
mm) when the 3/8-16 bolts are completely tightened.
(9)
Tighten the 3/8-16 bolts (1, Figure 3) alternately and evenly as follows:
a.
Set a torque wrench to 30 foot-pounds (41 N-m) and tighten all three 3/8-16 bolts to that
value. Block the coupling against clockwise rotation with a bar, as illustrated in Figure 10.
Observe the
CAUTION
above when it is necessary to rotate the shaft.
b.
Repeat step
(a)
above until 3/8-16 bolts can no longer be tightened.
c.
Recheck the dimension in Figure 9 to be sure it is the same as the dimension in (7) above.
Remove armature block installed in para. 4.b.(3). otherwise, damage to the
armature could result.
CAUTION
Coupling Kit
Figure 4
OM-2084 / Operation and Maintenance Manual
90CU24 / Series 500392 Generator Sets
Chapter 3-2
November 27/1997
Page 6
