Cummins/Onan — Location, Enclosure and Mounting
Installation · genset
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan HDKA, Cummins/Onan HDKAL/HDKAS engine
Before you start
- EXHAUST GAS IS DEADLY. Construct a suitable vapor barrier of approved materials between the genset and vehicle interior to keep out exhaust gas.
- Design the genset support structure carefully to prevent the genset from falling from the vehicle.
Procedure
- Orient the genset so the control panel will be outboard and accessible; remount the control box if not possible.
- Remote-mount the line circuit breakers if the genset location does not permit ready access.
- Provide access so the service access door on the side or bottom can be fully opened.
- Provide access for battery, fuel, remote control and AC connections.
- Make sure vehicle components below the genset will not interfere with draining engine oil or coolant.
- Provide protection against direct road splash and rain.
- Orient and enclose the genset so cooling and ventilating air flow is not restricted.
- If mounted within the cab or work space envelope, provide a vapor-tight, fire-resistive barrier of 26 gauge galvanized steel or equivalent.
- Use genset compartment acoustic insulation having at least a 250°F (121°C) self-extinguishing fire hazard classification.
- Provide at least 1 inch (25.4 mm) clearance to the top of the genset compartment.
- Support the genset on a structure resisting ±3 g vertical and ±1 g horizontal; use four 3/8-16 UNC bolts.
Specs & values
- 1 inch (25.4 mm) minimum top clearance
- ±3 g vertical / ±1 g horizontal support
- four 3/8-16 UNC bolts
Full service-parts list: Cummins/Onan HDKA →
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.