John Deere 8320RT / 8345RT / 8370RT service schedule

John Deere 8RT · Final Tier 4 build, serial 912001 on (Deere sheet gives no years)

Covers the John Deere 8320RT / 8345RT / 8370RT (Final Tier 4 track tractors).

Every maker's service job for the John Deere 8320RT / 8345RT / 8370RT, counted in hours, with the oils, filters and parts each one needs. Add your tractor to Farmyard Workshop and it works out what's due from your hours and dates, and keeps the service history.

Track your 8320RT / 8345RT / 8370RT for free

Versions: Serial 912001–915238; Serial 915239 on

Service intervals

Job	When
Engine oil and filter change	every 500 hours or every year
Fuel filters	every 500 hours or every year
Engine air filters (primary and secondary)	every 1,000 hours or every year
Cab fresh-air and recirculation filters	every 1,000 hours or every year
Fuel tank vent filters	every 1,000 hours
Track suspension compressor filter	every 1,500 hours or every year
Transmission and hydraulic oil filters	every 1,500 hours
DEF filters	every 4,500 hours or every 3 years
SCV oil filter	every 4,500 hours
Transmission and hydraulic oil and filter change	when needed
Coolant replacement	when needed

Service jobs and parts

Engine oil and filter change

Engine · every 500 hours or every year

Deere's sheet says change the engine oil and filter at 100 hours, then every 500 hours or annually. The 500 hours is only allowed with Plus-50 II oil, a John Deere filter and diesel with under 15 ppm sulphur. If any of these is not met, change at 250 hours.

Part	Qty	Notes	Part number
Engine oil	1	15W-40 (10W-30, 5W-40 or 0W-40 in colder weather). John Deere Plus-50 II, ≈25 L with filter. Aztec Oils match: EMPROTEC EHPD 15W-40	check your handbook
Engine oil filter	1	Deere filter sheet, 8RT Final Tier 4	RE509672

Step-by-step

Warm the engine, then park on level ground, lower the linkage, loader and any implement, stop the engine, take the key out and chock the wheels.
Let it stand a few minutes. Hot oil burns, so wear gloves.
Remove the sump plug and let the oil drain fully.
Remove the filter, check the old seal came off with it, and wipe the filter head clean.
Oil the new filter seal and fit the filter hand-tight as marked on it.
Refit the plug and fill with Plus-50 II to the full mark (≈25 L).
Run the engine for a minute, check for leaks, stop it and recheck the level. Take the old oil to a proper disposal point.

Tools: Drain tray (40 L), Filter wrench, Spanner or socket for the sump plug, Funnel, Gloves, Rags

Fuel filters

Fuel · every 500 hours or every year

Deere's sheet says replace the fuel filters every 500 hours and always change both together. Which parts you need depends on the engine option code. The fuel-water separator filter (if fitted) is cleaned every 500 hours.

Part	Qty	Notes	Part number
Primary fuel filter	1	Engine option code 3527 or 3521	RE539465
Secondary fuel filter	1	Engine option code 3527 or 3521	DZ112918
Fuel filter kit (both filters)	1	Engine option code 3523 or 3530	RE525523
Fuel water separator filter (if fitted)	1	Clean every 500 hours, then after every fifth back-flush	N378886

Step-by-step

Stop the engine, take the key out and chock the wheels. Keep naked flames away.
Clean around the filters before opening anything.
Drain any water from the separator into a container.
Remove the old filters and fit the new ones with clean seals. Where there are two, change both together.
Bleed or prime the system as your handbook describes.
Start the engine and check for leaks.

Tools: Container for fuel, Filter wrench, Rags, Gloves

Engine air filters (primary and secondary)

Engine · every 1,000 hours or every year

Deere's sheet says replace the primary air filter every 1,000 hours, annually or as indicated. The secondary is replaced with every second primary. The numbers change at serial 915239.

Part	Qty	Notes	Part number
Primary air filter	1	Serial 912001–915238 (housing RE325735)	RE587793
Primary air filter	1	Serial 915239 on (housing RE580335)	RE587791
Secondary air filter	1	Serial 912001–915238	RE587794
Secondary air filter	1	Serial 915239 on	RE587792

Step-by-step

Stop the engine and take the key out. Never run the engine with the filter out.
Open the housing and take out the primary element. Leave the secondary element in place unless it is due.
Wipe the housing out with a damp cloth. Do not blow dirt down the intake.
Fit the new element, check it seats evenly and close the housing. When the secondary is due, remove the primary first, change the secondary at once, then refit the primary.

Tools: Torch, Damp cloth

Cab fresh-air and recirculation filters

Cab · every 1,000 hours or every year

Deere's sheet says replace the cab recirculation and fresh-air filters every 1,000 hours or annually.

Part	Qty	Notes	Part number
Cab recirculation filter	1	Carbon version RE333569	RE291412
Cab fresh-air filter	1	Carbon version RE333567	RE284091

Step-by-step

Stop the engine and take the key out.
Open the filter covers and remove the elements, wearing a dust mask.
Clean reusable filters as the handbook says, or fit new ones the right way round.
Check the covers seal.

Tools: Screwdriver, Dust mask

Fuel tank vent filters

Fuel · every 1,000 hours

Deere's sheet says clean the fuel tank vent filters every 1,000 hours and replace them every 1,500 hours.

Part	Qty	Notes	Part number
Fuel tank vent filter (left)	1	Replace every 1,500 hours	RE566125
Fuel tank vent filter (right)	1	Replace every 1,500 hours	RE590260

Step-by-step

Stop the engine.
Remove each vent filter, clean it and refit, or replace it when due.

Tools: Rags

Track suspension compressor filter

Tracks · every 1,500 hours or every year

Deere's sheet says clean the suspension compressor filter every 250 hours and replace it every 1,500 hours or annually.

Part	Qty	Notes	Part number
Suspension compressor filter	1	Use with compressor RE579190	R556122
Suspension compressor filter	1	Use with compressor RE330144 or RE248068	A81682

Step-by-step

Stop the engine and take the key out.
Check the compressor number on your tractor against the sheet.
Remove the old filter and fit the right new one.
Run the suspension and check for air leaks.

Tools: Spanner, Rags

Transmission and hydraulic oil filters

Transmission · every 1,500 hours

Deere's sheet says replace the hydraulic oil filter and the hydraulic steering filter every 1,500 hours. The sheet gives no oil change interval.

Part	Qty	Notes	Part number
Hydraulic / transmission oil filter	1		RE210857
Hydraulic steering filter	1		RE577250

Step-by-step

Park on level ground, lower the linkage, loader and any implement, stop the engine, take the key out and chock the wheels.
With the engine off, work the spool and linkage controls to relieve hydraulic pressure.
Let hot oil cool before starting; it burns.
Clean around each filter, remove it and catch the oil.
Fit the new filters with oiled seals.
Run the engine briefly, stop, check for leaks and top up with Hy-Gard to the mark.

Tools: Drain tray, Filter wrench, Rags, Gloves

DEF filters

Exhaust · every 4,500 hours or every 3 years

Deere's sheet says replace the DEF dosing unit filter every 4,500 hours. The DEF tank breather is replaced after the first year of operation, then every three years or 4,500 hours, whichever comes first.

Part	Qty	Notes	Part number
DEF dosing unit filter	1	Every 4,500 hours	DZ114640
DEF tank vent (breather) filter	1	After the first year, then every three years or 4,500 hours	H216169

Step-by-step

Stop the engine and let the system cool.
Clean around the parts and remove the old filters.
Fit the new filters, keeping dirt out of the DEF.
Start the engine and check for DEF leaks.

Tools: Basic hand tools, Rags

SCV oil filter

Hydraulics · every 4,500 hours

Deere's sheet says replace the SCV oil filter every 4,500 hours.

Part	Qty	Notes	Part number
SCV oil filter	1		RE269061

Step-by-step

Park on level ground, lower implements and stop the engine.
Work the SCV levers to relieve pressure.
Remove the filter, catch the oil and fit the new one with an oiled seal.
Run the engine and check for leaks.

Tools: Drain tray, Filter wrench, Rags

Transmission and hydraulic oil and filter change

Transmission · when needed

Deere's sheet gives the quantity but no oil change interval, so check your handbook. The filters are changed with the oil.

Part	Qty	Notes	Part number
Hy-Gard oil	1	UTTO tractor transmission oil. John Deere Hy-Gard, ≈180 L. Aztec Oils match: AGRITEC UTTO	check your handbook
Hydraulic / transmission oil filter	1		RE210857
Hydraulic steering filter	1		RE577250

Step-by-step

Park on level ground, lower the linkage, loader and any implement, stop the engine, take the key out and chock the wheels.
With the engine off, work the spool and linkage controls to relieve hydraulic pressure.
Let hot oil cool for a while, then drain it from the drain plugs.
Refit the plugs and fit the new filters.
Fill with Hy-Gard, run the engine, work the hydraulics through their full travel, lower everything and recheck the level.

Tools: Large drain tray (100 L or more), Spanners, Filter wrench, Pump or funnel, Gloves

Coolant replacement

Cooling · when needed

Deere's sheet gives the quantity but no interval, so check your handbook and test the coolant every year.

Part	Qty	Notes	Part number
Cool-Gard II coolant	1	≈32.6 L	check your handbook

Step-by-step

Only work on a cold engine. Open the cap slowly to let pressure out.
Drain the radiator and block into a tray. Dispose of old coolant properly.
Refit the plugs and fill with Cool-Gard II.
Run the engine to working temperature with the heater on, let it cool and top up.

Tools: Drain tray, Hose, Coolant test strips

Oils, fluids and capacities

System	Oil or spec	Capacity
Engine	John Deere PowerTech 6-cylinder turbo diesel with DEF (engine size: check your handbook)
Engine oil	John Deere Plus-50 II. 15W-40 (10W-30, 5W-40 or 0W-40 in colder weather); viscosity for your climate: check your handbook	≈25 L, with filter
Coolant	John Deere Cool-Gard II, ≈32.6 L
Valve clearances	Check your handbook. Not in John Deere's filter sheet.
Engine oil	John Deere Plus-50 II, 15W-40	≈25 L, with filter
Transmission, hydraulics and differential	UTTO tractor transmission oil. John Deere Hy-Gard	≈180 L
Cooling system	John Deere Cool-Gard II	≈32.6 L
Diesel exhaust fluid (DEF)	John Deere Diesel Exhaust Fluid	≈28.8 L
Fuel tank	Diesel	≈803 L

Specifications


Models	8320RT, 8345RT, 8370RT
Track and tyre settings	Check your handbook

Known problems

DPF

The particulate filter part number depends on engine option code (RE563694, DZ100174 or DZ100484). Deere says to see a dealer within 250 hours of the warning light.

Separate sheet

8RT 310/340/370/410 (serial 923001 on) are a different build with different air filters and capacities.

Parts list with genuine part numbers

John Deere 8320RT / 8345RT / 8370RT (Final Tier 4 track tractors) - maker filter/service sheets and parts lists already cited on the site entry; serial splits are in the row notes

Cab

Part	Part number	Qty	Notes
Cab recirculation filter	RE291412	1	Carbon version RE333569
Cab fresh-air filter	RE284091	1	Carbon version RE333567

Engine service

Part	Part number	Qty	Notes
Engine oil filter	RE509672	1	Deere filter sheet, 8RT Final Tier 4
Primary air filter	RE587793	1	Serial 912001–915238 (housing RE325735)
Primary air filter	RE587791	1	Serial 915239 on (housing RE580335)
Secondary air filter	RE587794	1	Serial 912001–915238
Secondary air filter	RE587792	1	Serial 915239 on

Fuel

Part	Part number	Qty	Notes
Primary fuel filter	RE539465	1	Engine option code 3527 or 3521
Secondary fuel filter	DZ112918	1	Engine option code 3527 or 3521
Fuel filter kit (both filters)	RE525523	1	Engine option code 3523 or 3530
Fuel water separator filter (if fitted)	N378886	1	Clean every 500 hours, then after every fifth back-flush
Fuel tank vent filter (left)	RE566125	1	Replace every 1,500 hours
Fuel tank vent filter (right)	RE590260	1	Replace every 1,500 hours
DEF dosing unit filter	DZ114640	1	Every 4,500 hours
DEF tank vent (breather) filter	H216169	1	After the first year, then every three years or 4,500 hours

Transmission and hydraulics

Part	Part number	Qty	Notes
Hydraulic / transmission oil filter	RE210857	1
Hydraulic steering filter	RE577250	1
SCV oil filter	RE269061	1
Suspension compressor filter	R556122	1	Use with compressor RE579190
Suspension compressor filter	A81682	1	Use with compressor RE330144 or RE248068

Sources

Open Farmyard Workshop