Cummins/Onan 6CTA8.3 — Vibration Isolators Installation and Adjustment Procedure
Installation
For the Cummins/Onan 6CTA8.3, from the Cummins/Onan service manual.
Applies to: Cummins/Onan 6CTA8.3, Cummins/Onan DGBB, Cummins/Onan DGBC, Cummins/Onan DGCA, Cummins/Onan DGCB, Cummins/Onan DGCC, Cummins/Onan DGDA, Cummins/Onan DGDB, Cummins/Onan DGDK, Cummins/Onan DGEA, Cummins/Onan DGFA, Cummins/Onan DGFB
Procedure
- Place the vibration isolators on the genset support structure; shim/grout so isolator bases are within 0.25 in (6 mm) elevation of each other on a flat, level surface.
- Loosen the side snubber lock nuts so the top plate of the isolator is free to move vertically and horizontally; check alignment with base and springs.
- Place the genset onto the isolators, aligning the skid's mounting with the threaded isolator hole.
- Adjust the leveling bolts (locking nut threaded up toward bolt head) so the set is level; a nominal clearance of 0.25 in (6 mm) or greater between top plate and isolator base is desired.
- Adjust leveling bolts until the set is level and sufficient clearance remains.
Specs & values
- Isolator base elevation match: within 0.25 in (6 mm)
- Top plate to base clearance: 0.25 in (6 mm) or greater
Full service-parts list: Cummins/Onan DGBB →, Cummins/Onan DGBC →, Cummins/Onan DGCA →, Cummins/Onan DGCB →, Cummins/Onan DGCC →, Cummins/Onan DGDA →, Cummins/Onan DGDB →, Cummins/Onan DGEA →, Cummins/Onan DGFA →, Cummins/Onan DGFB →
Source: Cummins/Onan service 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.