Series 50

Section 26.11 Defective Pickup Screen Tube and Screen Assembly

Section 26.11
Defective Pickup Screen Tube and Screen Assembly

To determine if a defective pickup screen tube or screen assembly is causing low oil pressure, perform the following:‪

  1. Remove pickup screen tube and screen assembly; refer to "3.2.1 Repair or Replacement of Oil Pump" .
  2. Visually inspect pickup screen tube and screen assembly; refer to "3.2.3.1 Inspection of Oil Pump" .
    1. If no stress cracks, twisted screen tube, or cracked flange gaskets are found, check crankshaft main bearings; refer to "26.12 Defective Crankshaft Main Bearing Shells" .
    2. If stress cracks, twisted screen tube, or cracked flange gaskets are found; refer to "26.11.1 Pickup Screen Tube and Screen Assembly Repair" .

Section 26.11.1
Pickup Screen Tube and Screen Assembly Repair

Perform the following steps to repair the pickup screen tube and screen assembly:‪

  1. Replace all damaged components identified during inspection.
  2. Verify repairs to pickup screen tube and screen assembly; refer to "26.11.1.1 Test Engine with Repaired Pickup Screen Tube and Screen Assembly" .
Section 26.11.1.1
Test Engine with Repaired Pickup Screen Tube and Screen Assembly

Perform the following to determine if repaired relief valve resolved low oil pressure:‪

  1. Install the Diagnostic Data Reader to the vehicles Display Data Line Adaptor, see Figure "Typical Display Data Line Adaptor" ; refer to OEM guidelines.
  2. Start and run engine speed at 1800 r/min.
  3. Visually examine the DDR for oil pressure reading.
    1. If the DDR indicates 241 kPa (35 lb/in.2 ), at 1800 r/min, shut down the engine and disconnect the DDR. No further troubleshooting is required.
    2. If the DDR indicates less than 241 kPa (35 lb/in.2 ), at 1800 r/min, shut down the engine and disconnect the DDR, check crankshaft main bearings; refer to "26.12 Defective Crankshaft Main Bearing Shells" .


Series 50 Service Manual - 6SE50
Generated on 10-13-2008

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