Twin Disc Marine Transmission MGX-5065SC

Warning: Do not obstruct the flywheel housing vents

Free flow of air for cooling the coupling

Operating air temperatures above -6°C (22°F) and below 82°C (180°F) must be maintained

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, whichever comes first

Check for torsional vibration, misalignment, degradation by contaminants (oil), heat, ultraviolet radiation, and excessive system torque

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

Check the flywheel housing vents frequently

With a new transmission, change the oil and filter element within first 50 hours of operation. Change the oil more frequently if conditions warrant.

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.

1. Remove the breather or the oil fill closure from the top of transmission case.

2. Pour new oil through breather or closure opening. Fill with recommended clean oil, taking necessary precautions to prevent entry of dirt or debris. (See lubrication plate on transmission and information transcribed to the front of this manual for additional oil information.);

Engine running at low idle and marine transmission in neutral

Transmission control in NEUTRAL

Pressure registered within 15 seconds

Transmission filled to LOW mark on the dipstick

Warning: This check requires trained personnel with PPE!

Heat exchangers have anodes installed at the inlet and outlet heads

Enter the percentage of the rod disintegrated

Is over one half of the rod disintegrated?

If over one half of the rod is disintegrated, replace it to assure effective protection.

Excessive corrosion of the anode indicates electrolytic action

Make a careful inspection to determine if this action is caused by a short circuit or an external grounded electric current.

Is the action caused by a short circuit or an external grounded electric current?

If either of these conditions is found, do what is required to correct it to avoid frequent replacement of the anodes.

Warning: This procedure requires trained personnel with PPE!

Suction screen and filter element checked after eight hours of operation?

Upload a photo of the suction screen and filter element

Condition of the filter element

If the filter is dirty, change the element and operate for another eight hours. Check the filter again.

Filter element changed after 1000 hours of service?

Situations involving debris in the hydraulic system will require that heat exchangers and all connecting lines and hoses be thoroughly cleaned.

Heat exchangers and all connecting lines and hoses 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.