Perkins 900 Series — To fill and vent the cooling system
Maintenance
For the Perkins 900 Series, from the Perkins service manual.
Applies to: Perkins 900 Series CP/CR engine
Before you start
- Do not remove filler cap while engine hot and system under pressure.
Procedure
- Remove filler cap carefully.
- Fill cooling system until coolant reaches bottom of filler tube.
- If vent screw fitted in cylinder head, loosen it.
- When coolant free from air flows from vent point, tighten vent screw.
- If brass thermostat fitted horizontally, loosen vent screw on top until just tight.
- When coolant free from air flows, tighten thermostat vent screw.
- Remove filler cap and add coolant to bottom of filler tube; fit cap.
- Start engine, operate at 1750 rev/min for two minutes, stop and allow to cool.
- Repeat venting and filling until all air is eliminated.
Specs & values
- Engine run at 1750 rev/min for two minutes
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.