Caterpillar — Gas Shutoff Valve - Inspect
Maintenance
From a Caterpillar owner's manual covering: 1YG1-Up, 4CG1-Up, G3612, G3616. Check it applies to your exact model before use.
Applies to: Caterpillar G3612, Caterpillar G3616
Before you start
- NEVER use a flame to check for gas leaks. Use a gas detector.
Procedure
- Shut off engine.
- Shut off fuel supply to GSOV.
- Disconnect wiring harness from receptacle (1). Inspect connectors for damage and corrosion.
- Inspect gasket (2). Replace if damaged.
- Remove cap (3). Remove washer to inspect solenoid.
- Inspect solenoid for damage. Replace if epoxy coating cracked.
- Inspect cavity for moisture, debris, abrasion. Clean thoroughly.
- Remove bolts (4) and cover (5) to inspect internal parts.
- Clean internal parts. Inspect diaphragm, center pin, and shaft. Replace entire GSOV if damaged.
- Inspect internal passages. Remove debris.
- Reassemble diaphragm, center pin, and shaft. Install cover (5) with bolts (4).
- Install cap (3). Connect wiring harness to receptacle (1).
- Turn on fuel supply. Use gas detector to check for leaks.
Tools required
- gas detector Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Caterpillar 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.