
Appendix B
TROUBLESHOOTING
Listed below are some common conditions that may require trouble shooting and their possible solutions.
Lubrication Oil Running Hot
High ambient temperatures.
Wrong grade of gear oil.
Lubrication pump volume not sufficient.
Lubrication pump cavitating.
Heat exchangers not functioning properly or undersized. (See
Section 5.3
)
Lubrication oil returning on top of pinion and bull gear, resulting in high oil shear between gear teeth.
Running the pump at max speed for a longer duration than the design of the lubrication cooling system
can withstand.
Air, water, or other contaminates in the lubrication oil.
Insufficient lubrication oil volume in reservoir. Reservoir lubrication oil volume in gallons should be
2.5 times the lubrication pump volume in gallons per minute.
Impending mechanical failure within power end or gear reducer.
Defective temperature transducer and or temperature gauge.
Faulty temperature transducer cable.
Lubrication Oil Pressure Running Low
High ambient temperatures; excessively high oil temperature causing low viscosity.
Lubrication oil relief valve set too low or leaking.
Ruptured oil line inside of power frame.
Lubrication oil pump is worn out or not functioning properly.
Lubrication oil pump is cavitating due to low head.
Lubrication oil pump inlet line blocked, or shutoff valve for isolating pump from reservoir is blocked or
partially closed.
Air entering the lubrication oil pump suction inlet due to a loose connection, which allows air to be
sucked into the inlet, or a fluid level in the reservoir that is too low or so low that it causes a vortex,
which allows air into the inlet.
Revision K 03/12/2019
MSI - A Division of Dixie Iron Works, Ltd. All rights reserved.
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