Twin Disc Marine Transmission MGX-5135A

Warning: Do not obstruct the flywheel housing vents

Visual inspection of the coupling after the first 100 hours of operation

Visual inspection of the coupling every 2000 hours thereafter or every six months

Check for cracks or other signs of distress on the surface of the rubber

Check for accumulation of residue at the vents

Cause of accumulation of residue at the vents

If your unit is equipped with a lubrication fitting, grease the oil seals at the output end of the transmission output shaft through the lubrication fitting with water pump grease.

See the illustrations in Section 6.2 for location of the lubrication fitting.

Apply grease approximately every 100 hours when boat is docked. No other lubrication is required.

NOTE: Preferred grease is one with lithium soap, NLGI consistency #2 for component temperatures above 20° C (68° F).

Did you apply the grease as instructed?

Sign off on the lubrication procedure

Engine running at low idle and marine transmission in neutral?

Enter the transmission oil temperature

Enter the transmission oil pressure

Pressure registered within 15 seconds?

Transmission filled to LOW mark on the dipstick?

Warning: Do not obstruct the flywheel housing vents

Is the ambient temperature of the air around the coupling within the operating range (-6°C to 82°C)?

Enter the current operating hours of the machine

Is there any sign of torsional vibration, misalignment, degradation by contaminants (oil), heat, ultraviolet radiation, and excessive system torque?

Upload a photo of the coupling for visual inspection

Are there any cracks or other signs of distress on the surface of the rubber?

Is there an accumulation of residue at the vents?

Describe the cause of the accumulation of residue if found

Look for lint or other material that may collect from rags or towels used in the parts cleaning process.

Look for chips or shavings particularly if the transmission has had a problem that caused debris in the system. (For units with spin-on filters, this will require cutting the filter element apart to access the element core.); If the filter is clean, install a new filter element and then change the oil and filter element after 1000 hours of service. If the filter is dirty, change the element and operate for another eight hours. Check the filter again.

Continue this cycle until the filter is clean and then change the oil and filter after 1000 hours of service, or more often if conditions warrant.

NOTE: Situations involving debris in the hydraulic system will require that heat exchangers and all connecting lines and hoses be thoroughly cleaned. If the heat exchanger cannot be disassembled, or if it cannot be assured that all debris is removed, the heat exchanger should be replaced.

Remove and clean the suction strainer at every oil change or sooner if necessary. See illustrations in Section 6.2 for the location of the suction strainer for your transmission.

Drain the transmission by removing the oil drain plug from the rear/bottom of the transmission. See the illustrations in Section 6.2 or service literature for your transmission for location of transmission and filter drain plugs.

NOTE: Dispose of used oil and oil filters in accordance with federal, state or local laws. Exercise precautions to prevent environmental contamination during any transmission servicing procedure.