Perkins — Fuel Injector - Leakage Test
Testing & diagnosis
From a Perkins service manual covering: 402D-05, 403D-07, 403D-11, 403D-15, 404D-22, 404D-22T, 404D-22TA. Check it applies to your exact model before use.
Applies to: Perkins 402D-05, Perkins 403D-07, Perkins 403D-11, Perkins 403D-15, Perkins 404D-22, Perkins 404D-22T, Perkins 404D-22TA
Before you start
- Always wear eye protection; test fluid under pressure can pierce the skin.
Procedure
- Connect the fuel injector to suitable tooling with the spray directed into the extension and fuel collector.
- Pump the pressure to about 2030 kPa (294 psi) below the opening pressure of the fuel injector.
- Release the handle and note the time for pressure to decrease to approximately 0 kPa (0 psi).
- If the time is less than 5 seconds or more than 45 seconds, the fuel injector is faulty.
- Pump pressure to about 2030 kPa (294 psi) below opening pressure; fuel should not drip from the tip for at least ten seconds.
- Replace the fuel injector if the results are not acceptable.
Tools required
- nozzle tester Amazon
- adapter Amazon
- tube assembly Amazon
- extension Amazon
- fuel collector Amazon
- filter Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 2030 kPa (294 psi) below opening pressure
- time less than 5 seconds or more than 45 seconds
Full service-parts list: Perkins 402D-05 →, Perkins 403D-07 →, Perkins 403D-11 →, Perkins 403D-15 →, Perkins 404D-22 →, Perkins 404D-22T →, Perkins 404D-22TA →
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.