Perkins 900 Series — To test the fuel lift pump
Testing & diagnosis · Fuel system
For the Perkins 900 Series, from the Perkins service manual.
Applies to: Perkins 900 Series CP/CR engine
Procedure
- Disconnect fuel outlet pipe; fit 0-70 kPa pressure gauge to outlet.
- Release connection at gauge and operate priming lever to eliminate air.
- Operate starter motor for 10 seconds with stop control in stop position.
- Note maximum pressure. If less than 42/70 kPa, repair or renew pump.
- Check rate pressure reduces to half maximum; if less than 30 seconds, repair or renew pump.
- Remove gauge and connect outlet pipe.
- Release vent screw on filter head and operate priming lever until fuel free of air; tighten.
- Connect engine stop solenoid.
Tools required
- 0-70 kPa (0-10 lbf/in2) pressure gauge Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Test pressure 42/70 kPa (6/10 lbf/in2) 0,4/0,7 kgf/cm2
- Pressure reduction to half maximum in at least 30 seconds
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.