Generac Power Systems MAGNUM MMG75D User Manual

Maintenance
33701 C MMG75D-100D Operating Manual 39
* Replace primary air cleaner when filter minder gauge shows a vacuum of 25 in. H
2
O.
** If not using John Deere Plus 50 II engine oil, the interval must be decreased to every 250 hours.
ENGINE BREAK-IN REQUIREMENTS
Note: During the first 20 hours of operation, avoid long periods of no load or sustained maximum load operation. If
the generator is to run for longer than five minutes without a load, shut the generator down.
John Deere engines are supplied with engine break-in oil from the factory. Extra care during the first 100 hours of
engine operation will result in better performance and longer engine life. DO NOT exceed 100 hours of operation
with the break-in oil. Operate the engine at heavy loads (60-90% of maximum) as much as possible. If the engine
has spent significant time at idle, constant speed(s), and/or light load, or if makeup oil is required, a longer break in
period may be needed. See the engine operator’s manual for a full description of necessary procedures on the
addition of break-in oil and extension of the break-in period.
RESETTING THE MAINTENANCE ALARMS
The Power Zone™ controller will display a warning message when the unit is due for maintenance or service. The
maintenance or service interval is set at 250, 500 and 3000 hours of engine running time. Once the unit has been
serviced, the appropriate maintenance alarm reminder needs to be reset. The following procedure demonstrates
how to reset the maintenance alarms:
1. With the unit shut down, move the Control Power switch to “CONTROL ON (/I)”. After initialization, the controller
will toggle automatically to the Home screen.
2. Press ▲, ►, ▼, or ◄ to enter the maintenance screens.
3. Press  and O simultaneously. The next screen will display the Configuration menu.
Check Automatic Belt Tensioner and Belt
Wear

Check Cooling System 
Lubricate Leveling Jack(s) 
Check Generator Drive Plate Torque (see
Checking Generator Drive Plate Torque)

Replace OVR filter 
Replace oil filter 
Replace air filter 
Replace primary fuel filter 
Replace fuel filter final 
Replace fan belt 
Test Thermostats 
Replace Air Cleaner Elements 
Replace Alternator and Fan Belts 
Check Fuses 
Table 4: Basic Maintenance Schedule
Item Daily
100
Hrs.
(Break-
In
Period
Only)
Every
250
Hrs.
Every
500
Hrs./12
Month
s
Every
1000
Hrs.
Every
3000
Hrs./36
Months
As
Require
d

Generac Power Systems MAGNUM MMG75D Specifications

General

Brand	Generac Power Systems
Model	MAGNUM MMG75D
Category	Portable Generator
Language	English