Make sure that the pump is clean, and then put a straight-edge across the face of it. Use a feeler gauge to check the clearance between the straight-edge and …
FAQ how to check a gear type oil pump with a straight edge
What is a twin gear oil pump?
The twin gear pump is also known as an external pump. It is mounted inside the oil pan on the bottom of the engine. it uses two of intermeshing gears to pump oil. A shaft drives the first gear and the second gear is driven by the first gear.
How do you lubricate gears on a gear pump?
The gears need to be lubricated by the pumped fluid and should not be run dry for prolonged periods. Some gear pump designs can be run in either direction so the same pump can be used to load and unload a vessel, for example.
Can a gear pump be used in both directions?
Some gear pump designs can be run in either direction so the same pump can be used to load and unload a vessel, for example. The close tolerances between the gears and casing mean that these types of pump are susceptible to wear particularly when used with abrasive fluids or feeds containing entrained solids.
How to fill the oil pump with clean engine oil?
If the clearances are within the specified limits, fill the pump with clean engine oil. Before you replace the end cover, make sure that the sealing ring or gasket is in good condition and positioned correctly. Turn the drive gear until the tips of an inner and an outer lobe are opposite to each other.