Briggs & Stratton 276535, 271172 manual Oil Slinger with Pressure Filtration, Pressure Lubrication

Oil Slinger with Pressure Filtration

Vertical Models 120000, 210000, 280000, 310000, 330000

Some of these models are equipped with a gerotor pump that draws oil from the sump, pumps it through the oil filter, and back to the sump (Figure 11). The gerotor pump is driven by the cam gear. The slinger splashes oil throughout the crankcase.

NOTE: This system does not supply oil under pressure to any of the bearing surfaces.

Vertical Models 280000, 310000, 330000

On some of these models the gerotor pump draws oil from the sump and pumps it through the oil filter, then directly to the PTO bearing in the sump (Figure 14).

The gerotor pump is driven by the cam gear. An optional oil pressure gauge or switch can be installed at the oil filter adapter.

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Figure 11

Pressure Lubrication

Vertical Models 97700, 99700

A gerotor pump supplies oil to the camshaft bearings and the magneto bearing. The gerotor is located in the bottom of the sump, and is driven by camgear. Oil enters the pump through a slot and is pushed up the hollow camshaft to the magneto upper camshaft bearing and through a drilled passage to the crankshaft magneto bearing (Figure 12). The oil slinger lubricates the remaining bearings and journals.

Figure 12

Figure 13

Oil Pump Service

The oil pump can be removed from the outside of the sump (A, Figure 14). The oil pump screen, however, must be removed from the inside of the sump.

Figure 14

Remove Gerotor Pump

1.Remove three screws then remove pump cover (A, Figure 15) and o-ring (B).

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