Perkins 403F-11 — Air in Fuel - Test
Testing & diagnosis · fuel system
For the Perkins 403F-11, from the Perkins service manual.
Applies to: Perkins 403F-11
Before you start
- Work carefully around a running engine.
- Wear eye and face protection when using pressurized air.
Procedure
- Examine fuel system for leaks and check fuel level.
- Install fuel flow tube with sight gauge in return line; observe flow during cranking.
- If excessive air seen, install second sight gauge at inlet to fuel priming pump.
- Pressurize fuel tank to 35 kPa (5 psi), not exceeding 55 kPa (8 psi), and check for leaks.
- If source not found, connect external fuel supply to inlet of priming pump.
Tools required
- fuel flow tube with visual sight gauge Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 35 kPa (5 psi)
- 55 kPa (8 psi) maximum
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.