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John Deere 3120 Maintenance Data

John Deere 3120 Service Intervals

Every Ten Hours or Daily

Motor oil level checking. If the oil level is too low, fill in new oil.

Check the hydraulic/transmission oil level. If the hydraulic/transmission fluid is too low, fill the required volume.

Checking engine primary/secondary air filter elements. Replace if required.

Check radiator coolant level. If the coolant level is too low, fill the system.

Check engine idling, steering, service brakes and parking brake. Repair any malfunctions if necessary.

Every 50 Hours

Clean or replace the cab air recirculation filter. Part number: MIU10010.

Check tire pressure. If necessary, inflate the tires.

Check battery charge level and charge if necessary.

Check front axle oil level. Top up as necessary.

Check hydraulic oil level. Fill the hydraulic system as required.

Lubricate the front axle bearing assembly.

Inspect wheels and tighten nuts and bolts if necessary.

Every 200 hours

Change engine oil. Engine oil type - Plus-50, SAE 15W-40, 10W-40, 10W-30, 5W-30. API Service Category CH or higher. How much to fill: Engine oil capacity: 4.8 L (1.27 gal). When the procedure is complete, check the engine oil level.

Engine oil filter replacement. Oil filter part number: M806419. When change the filter, cleaning the housing is recommended. Check the oil level after installing a new filter. If necessary, add oil.

Change transmission/hydraulic fluid. Recommended fluid type: Low Viscosity Hy-Gard, J20C, J20D. How much to fill: PowrReverser Models - 23.8 L (6.3 gal), eHydro Models - 25.7 L (6.8 gal). After replacing the transmission/hydraulic oil, check the level with a dipstick.

Change transmission filter. Transmission filter element part number - LVA13065. Check the transmission/hydraulic oil level after installing a new filter element. Add fluid if necessary.

Clean radiator surface from dirt.

Inspect and adjust fan/alternator belt. If the belt is worn, replace it.

Check the tightening torque of the front and rear hub bolts.

Every 400 Hours

Change diesel fuel filter. Fuel filter element part number: MIU800645. Check diesel fuel pump settings.

Check engine primary air filter element. Change if necessary. Air filter part number - RE68048.

Inspect engine secondary air filter element. Replace as required. Part number - RE68049.

Check radiator coolant. Add coolant if necessary.

Check engine low idle speed. If necessary, adjust the engine idle speed.

Inspect all hoses and fittings. Tighten as required.

Change front axle oil. Front axle capacity: 4.5 L (4.8 qt).

Check brake adjustment.

Yearly

John Deere 3120 replacement parts

Engine Primary Air Filter. Part Number: RE68048
Engine Secondary Air Filter. Part Number: RE68049
Engine Oil Filter. Part Number: M806419
Engine Fuel Filter. Part Number: MIU800645
Transmission/Hydraulic Oil Filter. Part Number: LVA13065
Cab Air Recirculation Filter. Part Number: MIU10010

Replace filter and engine oil. Check and clean the oil system.

Install a new engine primary/secondary air cleaner elements.

Change transmission/transmission fluid.

Change hydraulic filter.

Change the fuel filter, but drain water from fuel tank first.

Clean radiator and oil cooler fins.

Flush the cooling system and add new coolant. Cooling system capacity: Models without Cab - 5.3 L (1.40 gal), Models with Cab - 7.0 L (1.85 gal).

Check all clamps hoses and hoses.

Check battery charging.

Check engine valve clearance.

Inspect and adjust fuel injectors.

JOHN DEERE TRACTORS ATTACHMENTS
1023E	2025R	2210	2520	3032E
3046R	3520	4066R	4105	4200
4320	4400	4520	4600	4720
430	420	455	X300	X350
X485	X500	X590	X700	X738

JOHN DEERE TRACTORS TROUBLESHOOTING
2640	3040	3310	3650	4100
5050D	5090R	5410	6105R	7200R
E130	L111	LA110	LT155	X300R