Perkins 403F-11 — Fuel Injector Pressure Test
Testing & diagnosis
For the Perkins 403F-11, from the Perkins service manual.
Applies to: Perkins 403F-11
Before you start
- Wear eye protection at all times during testing.
- Keep tip pointed away from operator and into fuel collector and extension.
Procedure
- Connect injector to suitable tooling; direct spray into extension and collector.
- Close gauge protector valve and shutoff valve, open pump isolator valve, flush injector 10 to 15 strokes at about sixty strokes per minute.
- Open gauge protector valve and slowly increase pressure until valve opens; note highest pressure indication.
Tools required
- nozzle tester Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- SAE J-967 (ISO 4113) oil
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.