Cummins/Onan — Align Generator Support to Skid Base
Installation · Generator support / skid base
From a Cummins/Onan owner's manual covering: 290.0WF-54R, 290.0WF-54XR, 290.0WF-57R, 290.0WF-59XR, 330.0WK-54R, 330.0WK-54XR, 330.0WK-55DR, 330.0WK-57XR, 330.0WK-59XR, 350.0WF-4R, 350.0WF-4XR, 350.0WF-5DR…. Check it applies to your exact model before use.
Applies to: Waukesha L1616-GSIU engine
Before you start
- The generator support must be aligned to the skid base to prevent premature generator bearing failure; failure to do so could void the warranty.
Procedure
- Set plant on its mounting foundation using vibration isolators; secure skid base to foundation.
- Remove the two mounting bolts and shims securing the generator support to the skid base.
- Use the mounting bolts as jackscrews in the threaded holes; remove tension and allow generator to hang free.
- Measure clearance from top of skid base to each generator support mounting surface.
- Add .035 inches to each side of the skid base; this determines the amount of shims required.
- Turn jackscrews to allow clearance for placing shims between skid base and generator support.
- Lower generator on shims and recheck total clearance (must equal base-to-support clearance plus .035 in.).
- Remove jackscrews and install as mounting bolts through generator support, shims and skid base; secure and lock.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- add .035 inches to each side of the skid base
Source: Cummins/Onan owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.