B5.9G, B5.9LPG – Troubleshooting and Repair Manual – 007-029   Lubricating Oil Pressure Regulator (Main Rifle)

19 mm

Remove the threaded plug, spring, and plunger.

Service Tip: The plunger normally can be removed by inserting one finger into the plunger bore until snug and pulling up. If the plunger can not be removed in this manner, the plunger is probably stuck and will require removal of the housing for plunger removal and cleaning.

WARNING  When using solvents, acids, or alkaline materials for cleaning, follow the manufacturer’s recommendations 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.

CAUTION  Compressed air used for cleaning should not exceed 207 kPa [30 psi]. Failure to do so can cause engine component damage.

Thoroughly clean all components with clean solvent.

Dry with compressed air.

NOTE: If the plunger bore requires cleaning, remove the housing so as not to flush debris into the engine.

Inspect the plunger and plunger bore. Polished areas on the plunger and bore are acceptable.

Verify the plunger moves freely in the bore.

19 mm

Install a new sealing o-ring on the threaded plug and lubricate with clean lubricating engine oil. Install the pressure regulator assembly.