Perkins 1103 / 1104 — Air in Fuel - Test
Testing & diagnosis · Fuel System
For the Perkins 1103 / 1104, from the Perkins service manual.
Applies to: Perkins 1103, Perkins 1104, Perkins 1104 (1103 also covered) engine
Before you start
- Work carefully around a running engine; hot or moving parts can cause personal injury.
- Always wear eye and face protection when using pressurized air.
Procedure
- Examine the fuel system for leaks. Check fuel line fittings and fuel level.
- Install a fuel flow tube with sight gauge in the fuel return line, in a straight section at least 304.8 mm (12 inches) long. Observe flow during cranking.
- If excessive air is seen, install a second sight gauge at the inlet to the fuel transfer pump and observe.
- Pressurize the fuel tank to 35 kPa (5 psi), maximum 55 kPa (8 psi). Check for leaks between tank and transfer pump.
- If the source is not found, disconnect the supply line from the tank and connect an external fuel supply to the transfer pump inlet.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Fuel tank pressurize to 35 kPa (5 psi); maximum 55 kPa (8 psi).
Full service-parts list: Perkins 1103 →, Perkins 1104 →
Source: Perkins 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.