Maintenance
40 MMG25I-35D-45I-55DF4 Operating Manual 36949 B
BASIC MAINTENANCE SCHEDULE - JOHN DEERE ENGINE
See the original equipment manufacturer’s operating manual for a complete list of mainte-
nance requirements. Failure to comply with the procedures as described in the engine
operator manual will nullify the warranty, decrease performance and cause equipment
damage or premature equipment failure. Maintenance records may be required to complete
a warranty request.
Use the schedule in the following table as a guide for regular maintenance intervals.
Item Daily
First
100
Hours
(Break-
In
Period)
Every
250
Hrs.
Every
500
Hrs./12
Months
Every
2000
Hrs.
Every
6000
Hrs./ 72
Months
As
Require
d
Check Oil Level
♦
Check Coolant Level
♦
Check Fuel Level
♦
Check Tire Pressure
♦
Check All Electrical Connections
♦
Inspect Radiator Fins For Debris, Clean As
Required
♦
Check Fuel Filter/Water Separator Bowl
♦
Check Air Cleaner Dust Valve Restriction Indi-
cator Gauge
♦
1
Perform Visual Walkaround Inspection
♦
Check Oil Vapor Recirculation System/Non-
Return Valve
♦
Change Engine Oil and Replace Oil Filter
♦
♦
2
Replace Oil Vapor Recirculation Filter
♦
Service Battery
♦
Replace Fuel Filter Elements
♦
Check Engine Mounts
♦
Check Air Intake Hoses, Connections, and
System
♦
Check Engine Electrical Ground Connection
♦
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 Air Cleaner Elements
♦
Replace Alternator and Fan Belts
♦
Test Thermostats
♦
Check Fuses
♦
Add Coolant
♦
Check Electrical Wiring and Connections
♦
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