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B5.9G, B5.9LPG – Troubleshooting and Repair Manual – 007-031   Lubricating Oil Pump

Preparatory Steps

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  • Remove the drive belt. Refer to Procedure 008-002.

NOTE: Removal is easier if the vibration damper is loosened before removing the belt. Refer to Procedure 001-052.

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Remove

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15 mm

Remove the vibration damper. Refer to Procedure 001-052.

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10 mm

Remove the front cover. Refer to Procedure 001-031.

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13 mm

Remove the four mounting capscrews.

Remove the pump from the bore in the cylinder block.

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Inspect for Reuse

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If the lubricating oil pump is to be inspected for reuse, follow these steps.

Inspect the lubricating oil pump gears for chips, cracks, or excessive wear.

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Remove the back plate.

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Mark “TOP” on the gerotor planetary.

  
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Remove the gerotor planetary.

Inspect for excessive wear or damage.

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 WARNING 

When using solvents, acids, or alkaline materials for cleaning, follow the manufacturer’s recommendation for use. Wear goggles and protective clothing to avoid personal injury.
 WARNING 

Wear appropriate eye and face protection when using compressed air. Flying debris and dirt can cause bodily injury.

Clean all parts in solvent, and dry with compressed air.

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Inspect the lubricating oil pump housing and gerotor drive for damage and excessive wear.

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 CAUTION 

Be sure the gerotor planetary is installed in the original position. Failure to do so can cause engine damage.

Install the gerotor planetary.

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Measure the tip clearance.

Limit
mm in
0.1778 MAX 0.007

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Measure the clearance of the gerotor drive/gerotor planetary to port plate.

Limit
mm in
0.127 MAX 0.005

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Measure the clearance of the gerotor planetary to the body bore.

Limit
mm in
0.381 MAX 0.015

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Measure the gears backlash.

Limits (Used Pump)
mm in
0.076 MIN 0.003
0.330 MAX 0.013

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Measure

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Measure the tip clearance.

Maximum Tip Clearance
mm in
0.1778 MAX 0.007

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Measure the clearance of the gerotor drive/gerotor planetary to port plate.

Gerotor Drive/Planetary to Port Plate Clearance
mm in
0.127 MAX 0.005

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Measure the clearance of the gerotor planetary to the body bore.

Gerotor Planetary to Body Bore Clearance
mm in
0.381 MAX 0.015

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Measure the gears backlash.

Gear Backlash
mm in
0.076 MIN 0.003
0.330 MAX 0.013

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Install

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Install the back plate.

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 CAUTION 

Failure to fill the pump with oil during installation can result in a slow prime at initial engine start-up, resulting in severe engine damage.

Lubricate the lubricating oil pump with clean lubricating engine oil.

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 CAUTION 

Make sure the idler gear pin is installed in the locating bore in the cylinder block. Failure to do so can cause engine damage.

Install the lubricating oil pump.

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13 mm

Tighten in the sequence shown.

Torque Value:  24  n.m  [18 ft-lb]

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NOTE: The back plate on the pump seats against the bottom of the bore in the cylinder block. When the lubricating oil pump is correctly installed, the flange on the lubricating oil pump will not touch the cylinder block.

  
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NOTE: Be sure the gear backlash is correct if installing a new lubricating oil pump.

Measure the gear backlash.

Backlash Limits
mm in
A 0.076 MIN 0.003
  0.330 MAX 0.013
B 0.076 MIN 0.003
  0.330 MAX 0.013

NOTE: If the adjoining gear moves when you measure the backlash, the reading will be incorrect.

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Gear Cover – Installation

Lubricate the front gear train with clean lubricating engine oil.

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 CAUTION 

The seal lip and the sealing surface on the crankshaft must be free from all oil residue to prevent seal leaks.

Thoroughly clean the front seal area of the crankshaft.

NOTE: Always replace the front seal when removing and installing the gear cover.

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10 mm

Three-Bond™ Sealant, Part No. 3823494

Apply a thin bead of Three-Bond™ sealant, Part No. 3823494,or equivalent, to the front cover side of the gasket only.

NOTE: Do not remove the plastic seal pilot tool from the lubricating oil seal at this time. Use the plastic seal pilot tool to guide the seal on the crankshaft.

Install the gasket and front cover on the engine.

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Tighten the front cover mounting capscrews.

Remove the plastic pilot tool from the crankshaft.

Torque Value:  24  n.m  [18 ft-lb]

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Install the front cover access cap and seal.

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15 mm

Install the crankshaft pulley or vibration damper. Do not
tighten the capscrews to the correct torque value at this time.

Refer to Procedure 001-052.

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1/2-Inch Square Drive

Raise the belt tensioner to install the belt.

Refer to Procedure 008-087.

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15 mm

Tighten the vibration damper.

Refer to Procedure 001-052.

Torque Value:  125  n.m  [92 ft-lb]

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Last Modified:  27-Jun-2002
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Hello, I'm Jack, a diesel engine fan and a blogger. I write about how to fix and improve diesel engines, from cars to trucks to generators. I also review the newest models and innovations in the diesel market. If you are interested in learning more about diesel engines, check out my blog and leave your feedback.