Coupling Installation - Hobart 60CU20 Operation And Maintenance Manual With Illustrated Parts List

OM-2226 / Operation and Maintenance Manual
60CU20 / Series 500062 / 400 Hz. Generator Set
(3) Shake the container of lubricant (supplied with kit) vigorously and poor it into a small shallow dish.
(4) Roll a bushing in the lubricant to coat it thoroughly. Press it into a socket (from the chamfered
end) to the dimension shown in Figure 4.
(5) Repeat step 4 until all new bushings are installed.
(6) Balance the complete coupling assembly to 1/2 inch-ounce (360 mg-m) minimum.

4) Coupling Installation

WARNING
To prevent personal injury, keep fingers and hands clear of generator assembly until
the armature is block into place to prevent rotation.
CAUTION
Improper installation of the coupling assembly can result in serious damage to the
equipment. Follow these installation instructions exactly.
a) Cleaning
Refer to Figure 5. It is VERY IMPORTANT that the shaft, the bore and the outside of the split
bushing, and the tapered inside of the hub be thoroughly CLEANED FREE OF DIRT AND GRIT.
CAUTION
Do not lubricate any of the surfaces listed above. Lubrication of these surfaces can
cause the coupling to fail and damage the generator set. Slight traces of rust are
permissible on the surfaces.
b) Assembly
(1) If an adapter ring must be replaced, remove the bolts that secure it to the flywheel. Discard the
old adapter ring and bolts. Install the new adapter ring using new socket head bolts.
Torque all bolts to 100 ft-lbs (135 N-m).
The new adapter ring and bolts are included in the kit, when required.
(2) Refer to Figure 6. Place a straight edge across the engine flywheel housing face and take a
measurement from the face to the adapter plate. Record this dimension for locating the coupling
assembly on the generator shaft in the next steps.
(3) Refer to Figure 3. Assemble the bushing into the hub.
CAUTION
Make certain that only the bolts are lubricated, and that no lubricant is permitted to get
inside the bushing where the armature shaft will enter the bushing.
(4) Lubricate the three 3/8-16 bolts SPARINGLY and start them into the three (unthreaded) holes
finger-tight.
May 2, 2013 Chapter 3-2
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