Cummins/Onan — Change Corrosion Resistor Element
Maintenance
From a Cummins/Onan service manual covering: V12 Series, V6-140, V6-200, V6-VAL, V6-VIM, V8-185, V8-265, V8-350, V8-VALE, V8-VINE, VT12, VT8-430. Check it applies to your exact model before use.
Applies to: Cummins/Onan V12 Series
Before you start
- Never use soluble oil in cooling system when a corrosion resistor is installed.
Procedure
- Close shut-off valves on inlet and drain lines; unscrew drain plug at bottom of housing.
- Remove cover capscrews and cover.
- Remove plate securing element(s); lift element(s) from housing and discard; remove plate below element.
- Lift spring from housing.
- Polish plates; if less than half of metal plates can be exposed by polishing, install new plates.
- Replace spring and lower plate.
- Remove transparent bag from new element(s); install element(s) in housing.
- Replace upper plate, gasket and cover.
- Replace drain plug and open shut-off valves in inlet and drain lines.
Specs & values
- Change element at each C check; V12 and L at each B check
- Chromate concentration between 100 and 150 grains per gallon
Full service-parts list: Cummins/Onan V12 Series →
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.