See Figure 24, detail A. Install all the hexagon head capscrews and lockwashers securing the generator
adapter to the engine flywheel housing. Torque the capscrews on the lower half of the adapter to 50
pound-feet (68 newton-meters). Leave the upper half of the bolt circle finger tight
Using feeler gages, check the gap between the adapter and flywheel housing at the top of the ring. If the
gap is greater than 0.015 inch (0.38 mm), alternately torque to 50 pound-feet (68 newton-meters) the bolts
on the top half of the ring, starting at the points farthest from 12 o'clock position until a maximum gap of
0.015 inch (0.38 mm) is obtained. If a gap of 0.015 inch (0.38 mm) cannot be achieved, the generator
adapter ring or drive plates may not be properly aligned and seated. Remove all hexagon head capscrews
and lockwashers securing generator adapter to engine flywheel housing, and repeat procedures described
in paragraph 2-1 5b(22) through (25).
Raise both engine and generator assembly and remove the 1/2 inch (13 mm) spacer blocks from beneath
the rear engine supports (6, Figure 2-5). Lower the engine and generator assembly to the skid base
mounting pads. Relieve all crane and sling tension.
Using feeler gages, check the gap at the 12 o'clock position of the adapter to flywheel housing mating
area. If the gap is decreased to a dimension greater than 0 but less than 0.015 inch (0.38 mm), proper
alignment has been attained and proceed directly to step (18), below. If the gap is 0, longitudinal preload
is assumed and shimming will be required between the rear engine supports (6) and the skid base.
Proceed as follows:
Raise the engine and generator assemblies and install 0.015 inch (0.38 mm) shims (19) between
both rear engine supports (6) and the skid base. Lower the engine and generator assemblies and
check the adapter to flywheel housing gap as described in step (13), above.
(b) As require, shim both rear engine supports in equal increments of 0.005 inch (0.127 mm) until a
maximum gap of 0.015 inch (0.38 mm) is attained.
(14) Using feeler gages, check the two rear engine supports and four generator mounting pads for clearance to
the slid base. If clearance is 0 to 0.010 inches (0.25 mm), proceed directly to step (15), below. If clearance
is greater than 0.010 inches (0.25 mm), shims must be installed to reduce the clearance to an acceptable
limit of less than 0.010 inches (0.25 mm). Proceed as follows:
The shimming procedure will require the raising and lowering of engine and generator
assemblies until acceptable clearance is attained.
Install shim (19, Figure 2-5) beneath rear engine supports until acceptable clearance is attained.
Shim equally at both mounts.
See Figure 2-4, detail D. Add shims beneath generator feet until acceptable clearance is attained.
Shim equally at all four mounts.
After attaining acceptable clearances, remove lifting slings for both engine and generator assemblies.
Install lockwashers (8, Figure 2-5) and hexagonal nuts (9) securing rear engine mounts to skid base.
(17) Torque hexagonal nuts (9 and 13) and capscrews (7 and 10) to 200 pound-feet (271 newton-meters) on
both rear engine mounts and front engine support
(18) See Figure 24. Install hexagon head capscrews, hexagonal nuts, and lockwashers to secure the generator
to the skid base and torque in two stages, as follows: (a) Beginning with the two rear feet then the two front
feet, torque to 600 pound-feet (813 newton-meters).
Using feeler gage, check the gap at the top of the adapter to engine mating surface. if the gap is not
within the acceptable limit of 0 to 0.015 inch (0.38 mm), the shimming procedure must be repeated
until an acceptable limit is attained. Add shims beneath rear engine supports or generator mounting
feet as required.
If the gap is within the acceptable limit of 0 to 0.015 inch (0.38 mm), apply the final torque of 850
pound-feet (1156 newton-meters) to the hexagon head capscrews securing the generator mounting