Cummins/Onan 1750DQKB — Frame 7 Angular Alignment Procedure
Adjustments · generator to engine alignment
For the Cummins/Onan 1750DQKB, from the Cummins/Onan service manual.
Applies to: Cummins/Onan 1750DQKB, Cummins/Onan DQKB, Cummins/Onan DQKC
Before you start
- Disconnect negative battery cable(s) before beginning; accidental starting presents hazard of severe personal injury or death.
Procedure
- Disconnect the negative (–) battery cable(s) before beginning.
- Fasten a dial indicator to the generator shaft or cooling fan with the sensing point on the capscrew head or flat of the drive disc at bolt circle diameter.
- Bar the engine over clockwise (viewed from engine flywheel); do not allow it to roll back on compression.
- Record T.I.R. as the sum of the maximum positive and negative readings over one revolution.
- To correct, remove or add equal shims under the four generator mounting feet.
- Approximate shim change: multiply (step 1 to step 2 distance ratio) by one half the T.I.R.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- T.I.R. should not be more than .001" for each inch of radius (center of shaft to indicator axis)
Full service-parts list: Cummins/Onan 1750DQKB →, Cummins/Onan DQKB →, Cummins/Onan DQKC →
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.