Section 1
Section 1
EngineEngine
1-11-1TX / TXH / TXB 180S - 400L (Rev. 4/23/07)TX / TXH / TXB 180S - 400L (Rev. 4/23/07)
OILOIL
FILTERFILTER
DRAINDRAIN
PLUGPLUG
FILLERFILLER
CAPCAP
OILOIL
DIPSTICKDIPSTICK
Illustration 1-1. Illustration 1-1. Cummins Cummins QSB6.7 Engine QSB6.7 Engine Service PointsService Points
Introduction.Introduction. The CummThe Cummins QSB6.7 ins QSB6.7 engine isengine is
pressure lubricated. pressure lubricated. Oil pressure Oil pressure is supplied is supplied by aby a
gear-type lubricating oil pump and controlled by agear-type lubricating oil pump and controlled by a
pressure regulator. pressure regulator. The filter The filter bypass valve bypass valve ensur-ensur-
es that a supply of oil, in the event the filteres that a supply of oil, in the event the filter
becomes plugged, becomes plugged, is present. is present. One full One full flow oilflow oil
filter is incorporated in the lubricating system tofilter is incorporated in the lubricating system to
provide maximum cleansing and filtration of theprovide maximum cleansing and filtration of the
engine lubricating oil.engine lubricating oil.
Checking The Lubricating OilChecking The Lubricating Oil (Illustration 1-1)(Illustration 1-1)..
The engine lubricating oil should be checked dailyThe engine lubricating oil should be checked daily
on the oil dipstick to ensure that the engine hason the oil dipstick to ensure that the engine has
the proper amount of oil for operation.the proper amount of oil for operation.
Changing The Oil and Filter Changing The Oil and Filter ElementElement (Illustration(Illustration
1-1)1-1).. The engine The engine lubricating oil lubricating oil and filter and filter shouldshould
be replaced periodically (refer to thebe replaced periodically (refer to the PreventivePreventive
MaintenanceMaintenancechart in thechart in the AppendicesAppendicesfor oil andfor oil and
filter replacement filter replacement interval). interval). The oil The oil filter should filter should bebe
replaced each time the engine oil is changed.replaced each time the engine oil is changed.
Refer to theRefer to the Fuel and Lubricant SpecificationsFuel and Lubricant Specifications
chart in thechart in the AppendicesAppendicesfor the proper grade offor the proper grade of
oil to oil to use. use. Perform the Perform the following procedures following procedures toto
replace the oil and filter:replace the oil and filter:
Do not use ether to start anDo not use ether to start an
engine equipped with an electric heaterengine equipped with an electric heater
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