33701 C MMG75D-100D Operating Manual 37
Section 4 - Maintenance
EMISSIONS INFORMATION
For emissions information, see the OEM engine manual.
DAILY WALK AROUND INSPECTION
Look for conditions that could hinder performance or safety, such as (but not limited to) oil/coolant/fuel leakage,
blocked vents, loose/missing hardware, and electrical connections.
Visually inspect the fan belt for cracks, fraying, stretching, and verify the belt is properly seated in the pulley grooves.
Replace the belt according to the manufacturer’s recommendations.
Note: At the 500 hour/12 month service interval, it is recommended that the belt be removed and checked for wear.
While the belt is removed, inspect pulleys and bearings. Rotate and feel for hard turning or unusual sounds. If pulleys
or bearings need replacement, contact the engine manufacturer.
Failure to perform a daily inspection could result in serious damage to the prime mover.
GENERAL MAINTENANCE
Poorly maintained equipment can become a safety hazard. In order for the equipment to operate safely and properly
over a long period of time, periodic maintenance and occasional repairs are necessary. NEVER perform routine
service (oil/filter changes, cleaning, etc.) unless all electrical components are shut off. Before servicing the unit,
always follow the instructions listed below.
• Verify the Control Power switch is turned OFF (O).
• Verify the circuit breakers are turned OFF (O).
• Activate (push in) the emergency stop switch.
• Disconnect the negative (-) terminal on the battery.
• Attach a “Do Not Start” sign to the control panel. This will notify everyone that the unit is being serviced and
will reduce the chance of someone inadvertently trying to start the unit.
• Do not wash the unit with a high pressure hose or with any kind of power washer.
• Do not wash the engine block or fuel tank with a power washer or steam cleaner. Water may enter the cabinet
and collect in the generator windings or other electrical parts, causing damage.
• If the unit is stored outside, check for water inside the cabinet and generator before each use. If wet, dry the
unit thoroughly before starting.
• Inspect condition of electrical cords. DO NOT use the unit if insulation is cut or worn through.
• Verify the condition of the air filter by viewing the level of the vacuum draw on the filter minder gauge. Replace
the air filter when the yellow center bar reaches the red section on the gauge (20 in. H
2
O).
• Check wheel lugs. see Towing the Unit.
• Check coolant level daily. See the engine operator’s manual for coolant recommendations and proper mixture.
○ Coolant is checked visually by inspecting the level in the coolant overflow jug located near the radiator.
○ Normal operating level is between the FULL and ADD markings on the overflow jug, also known as the
normal range.
○ When engine is stopped and completely cool, coolant may be added directly to the coolant overflow jug.
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