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Generac Diesel Generators MMG55FH: Daily Maintenance (John Deer Engine)

This procedure helps out in looking 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.
MaintainX
10/24/2021

Generac Diesel Generators MMG55FH: Daily Maintenance (John Deer Engine)

1 steps
This procedure helps out in looking 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.
  • Check the engine oil level daily before starting engine. DO NOT start the generator if the oil level is below the ADD mark on the dipstick. The normal operating level for the engine oil is anywhere in the crosshatch pattern between the FULL and ADD markings. Add oil to the engine only if the level is below the ADD mark on the bottom of the crosshatch pattern. DO NOT OVERFILL the crankcase. Consult the engine OPERATION AND MAINTENANCE MANUAL for the proper grade of oil, including special operating conditions

  • Check the coolant level daily. The coolant is checked by visually inspecting the level in the coolant overflow jug, located near the radiator. The normal operating level is anywhere between the FULL and ADD markings on the overflow jug, with the optimum level noted as “NORMAL RANGE”. Coolant may be added directly to the overflow jug WHEN THE ENGINE IS STOPPED AND COMPLETELY COOL. Consult the engine OPERATION AND MAINTENANCE MANUAL for coolant recommendations and proper mixture.

  • Check the condition of the air filter by viewing the level of 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. H20).

  • Use the schedule in the following table as a guide for regular maintenance intervals. For additional or replacement copies of the engine operator’s manual, contact an authorized dealer in your area.

  • John Deer Engine Maintenance Procedure:

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