Perkins — Engine Oil Pressure - Test
Testing & diagnosis · Lubrication system
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
Procedure
- Ensure the engine is filled to the correct oil level.
- Connect a suitable gauge to a pressure tap location for engine oil.
- Operate the engine and allow it to obtain normal operating temperature.
- Keep the oil temperature constant with the engine at the rated rpm; read the pressure gauge.
- Refer to the oil pressure table to determine if the oil pressure is in tolerance.
Tools required
- suitable oil pressure gauge Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Oil Pressure at high idle 196 to 441 kPa (28.4 to 64 psi)
- Oil Pressure at low idle 49 kPa (7.1 psi) or more
- Oil temperature must be 80° to 110°C (176° to 230°F)
- Inspected if a sudden change of 70 kPa (10 psi) in oil pressure occurs
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.