Perkins 403F-11 — Compression - Test
Testing & diagnosis · engine cylinders
For the Perkins 403F-11, from the Perkins service manual.
Applies to: Perkins 403F-11
Before you start
- Measure compression on all cylinders to avoid improper diagnosis.
Procedure
- Remove fuel injector from cylinder to be measured.
- Connect suitable compression gauge to cylinder.
- Disconnect fuel shutoff solenoid.
- Operate starter motor and record pressure on gauge.
- Repeat for each cylinder.
Tools required
- compression gauge Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 2940 kPa (426 psi) standard at assembly
- 2450 kPa (355 psi) repair limit
- 350 kPa (51 psi) maximum variation between cylinders
- at 250 rpm
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.