Perkins 1104 — Welding on Engines with Electronic Controls
Repair & overhaul · Engine / ECM
For the Perkins 1104, from the Perkins owner's manual.
Applies to: Perkins 1104, Perkins 1104D engine
Before you start
- Do not ground the welder to electrical components such as the ECM or sensors. Improper grounding can cause damage to the drive train bearings, hydraulic components, electrical components, and other components.
Procedure
- Stop the engine. Turn the switched power to the OFF position.
- Disconnect the negative battery cable from the battery. If a battery disconnect switch is provided, open the switch.
- Disconnect the J1/P1 connectors from the ECM. Move the harness so it cannot contact ECM pins.
- Connect the welding ground cable directly to the part that will be welded, as close as possible to the weld.
- Protect the wiring harness from welding debris and spatter.
- Use standard welding practices to weld the materials.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Perkins 1104 →, Perkins 1104D engine →
Source: Perkins 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.