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 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
2-15b(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 (30), below. If the gap is 0, longitudinal preload
is assumed and shimming will be required between the rear engine supports (6, Figure 2-5) 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 (25), above.
As require, shim both rear engine supports in equal increments of 0.005 inches (0.127 mm) until a
maximum gap of 0.015 inches (0.38mm) is obtained.
Using feeler gages, check the two rear engine supports and four generator mounting pads for clearance to
the skid base. If clearance is O to 0.010 inches (0.025 mm), proceed directly to step (30), below. If
clearance is greater than 0.010 inches (0.025 mm) shims must be installed to reduce the clearance to an
acceptable limit of less than 0.010 inches (0.025mm). Proceed as follows: NOTE The shimming procedure
will require the raising and lowering of engine and generator assemblies until acceptable clearance is
Install shims (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.
See Figure 2-5 and install lockwashers (8) and hexagonal nuts (9) securing rear engine mounts to skid
base. Torque to 200 pound-feet (271 newton-meters) hexagonal nuts (9) and capscrews (7) on rear engine
mounts and hexagonal nuts (13) and capscrews (10) on front engine support.
See Figure 2-4. Install hexagon head capscrews, hexagonal nuts, and lockwashers to secure the
generator to the skid base and torque in two stages, as follows:
Beginning with the two rear feet then the two front feet, torque to 600 pound-feet (813 newton-
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 inches (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 inches (0.38 mm), apply the final torque of 850
pound-feet (1156 newton meters) to the hexagon head capscrews securing the generator mounting