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John Deere 8420 Parts

Looking for John Deere 8420 parts? You've come to the right place. At Wengers, we stock the parts you need to keep your 8420 running strong, so you can get back to work without the long wait times.

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Click a component to view the parts we have in stock for your 8420

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Air Intake 2
Part #
Description
Condition
Stock
Price
AIR PIPE
R164837
AIR PIPE
R164837
AIR PIPE
Used
Out of Stock
INTAKE MANIFOLD
R505132
INTAKE MANIFOLD
R505132
INTAKE MANIFOLD
Used
In Stock
$325.00
Brakes 3
Part #
Description
Condition
Stock
Price
BRAKE DISC
RE192925
BRAKE DISC
RE192925
BRAKE DISC
Used
In Stock
$100.00
R175398
FRONT COVER - L.H.
Used
In Stock
$456.00
RE568525
PTO BRAKE DISC
Used
In Stock
$59.00
Clutch 5
Part #
Description
Condition
Stock
Price
CLUTCH PACK ASSEMBLY
R304385.A
CLUTCH PACK ASSEMBLY
R304385.A
CLUTCH PACK ASSEMBLY
Used
In Stock
$750.00
MFWD CLUTCH DRUM
R190760
MFWD CLUTCH DRUM
R190760
MFWD CLUTCH DRUM
Used
In Stock
$298.00
PST CLUTCH ASSEMBLY
R163993.A
PST CLUTCH ASSEMBLY
R163993.A
PST CLUTCH ASSEMBLY
Used
In Stock
$300.00
PST CLUTCH ASSEMBLY
R304383.A
PST CLUTCH ASSEMBLY
R304383.A
PST CLUTCH ASSEMBLY
Used
In Stock
$250.00
TRANSMISSION CLUTCH ASSEMBLY
R155922.A
TRANSMISSION CLUTCH ASSEMBLY
R155922.A
TRANSMISSION CLUTCH ASSEMBLY
Used
In Stock
$550.00
Cooling & Heating System 1
Part #
Description
Condition
Stock
Price
AUX FAN DRIVE ASSEMBLY
R504799
AUX FAN DRIVE ASSEMBLY
R504799
AUX FAN DRIVE ASSEMBLY
Used
In Stock
$813.00
Drawbars / Hitches 2
Part #
Description
Condition
Stock
Price
BUMPER SPACER
R163799
BUMPER SPACER
R163799
BUMPER SPACER
Used
In Stock
$28.00
LIFT LINK PIN
R169163
LIFT LINK PIN
R169163
LIFT LINK PIN
Used
In Stock
$39.00
Electrical System 2
Part #
Description
Condition
Stock
Price
BATTERY HOLD DOWN
R192571
BATTERY HOLD DOWN
R192571
BATTERY HOLD DOWN
Used
In Stock
$15.00
DRAIN PLUG
R114108
DRAIN PLUG
R114108
DRAIN PLUG
Used
In Stock
$54.00
Engine - Diesel 10
Part #
Description
Condition
Stock
Price
AUX FAN DRIVE ASSEMBLY
R504799
AUX FAN DRIVE ASSEMBLY
R504799
AUX FAN DRIVE ASSEMBLY
Used
In Stock
$813.00
R130818
CYLINDER HEAD
Used
Out of Stock
R130818
CYLINDER HEAD
Reconditioned
Out of Stock
RE57603
DAMPER PULLEY
Used
In Stock
$213.00
DRAIN PLUG
R114108
DRAIN PLUG
R114108
DRAIN PLUG
Used
In Stock
$54.00
INTAKE MANIFOLD
R505132
INTAKE MANIFOLD
R505132
INTAKE MANIFOLD
Used
In Stock
$325.00
R171354
OIL PAN
Used
In Stock
$553.00
ROCKER SHAFT ASSEMBLY
RE505320
ROCKER SHAFT ASSEMBLY
RE505320
ROCKER SHAFT ASSEMBLY
Used
In Stock
$62.00
TIMING COVER
R502083
TIMING COVER
R502083
TIMING COVER
Used
Out of Stock
WATER PUMP HOUSING
R504800
WATER PUMP HOUSING
R504800
WATER PUMP HOUSING
Used
In Stock
$732.00
Exhaust 2
Part #
Description
Condition
Stock
Price
EXHAUST MANIFOLD
R504711
EXHAUST MANIFOLD
R504711
EXHAUST MANIFOLD
Used
Out of Stock
EXHAUST MANIFOLD
R504712
EXHAUST MANIFOLD
R504712
EXHAUST MANIFOLD
Used
In Stock
$921.00
Frame Or Chassis 1
Part #
Description
Condition
Stock
Price
R193023
CENTER FRAME
Used
Out of Stock
Front Differential 3
Part #
Description
Condition
Stock
Price
AXLE PINION GEAR
R560122
AXLE PINION GEAR
R560122
AXLE PINION GEAR
Used
Out of Stock
AXLE PINION SHAFT
R560525
AXLE PINION SHAFT
R560525
AXLE PINION SHAFT
Used
Out of Stock
RE324794
RING & PINION SET
Used
Out of Stock
Fuel System 2
Part #
Description
Condition
Stock
Price
INJECTOR CLAMP
R502602
INJECTOR CLAMP
R502602
INJECTOR CLAMP
Used
In Stock
$14.00
INJECTOR FITTING
RE509416
INJECTOR FITTING
RE509416
INJECTOR FITTING
Used
In Stock
$20.00
Hydraulic Systems 7
Part #
Description
Condition
Stock
Price
AUX FAN DRIVE ASSEMBLY
R504799
AUX FAN DRIVE ASSEMBLY
R504799
AUX FAN DRIVE ASSEMBLY
Used
In Stock
$813.00
BUMPER SPACER
R163799
BUMPER SPACER
R163799
BUMPER SPACER
Used
In Stock
$28.00
HITCH COVER
R160281
HITCH COVER
R160281
HITCH COVER
Used
In Stock
$40.00
LIFT CYLINDER
AH174938
LIFT CYLINDER
AH174938
LIFT CYLINDER
Used
In Stock
$589.00
LIFT CYLINDER
AH174979
LIFT CYLINDER
AH174979
LIFT CYLINDER
Used
Out of Stock
SCV END COVER
RE203182
SCV END COVER
RE203182
SCV END COVER
Used
Out of Stock
STEERING CYLINDER - L.H.
RE178755
STEERING CYLINDER - L.H.
RE178755
STEERING CYLINDER - L.H.
Used
In Stock
$195.00
Platform 2
Part #
Description
Condition
Stock
Price
BATTERY HOLD DOWN
R192571
BATTERY HOLD DOWN
R192571
BATTERY HOLD DOWN
Used
In Stock
$15.00
PLATFORM
R256866
PLATFORM
R256866
PLATFORM
Used
Out of Stock
PTO 6
Part #
Description
Condition
Stock
Price
DIFFERENTIAL CASE W/ GEARS
R174118.A
DIFFERENTIAL CASE W/ GEARS
R174118.A
DIFFERENTIAL CASE W/ GEARS
Used
In Stock
$2,750.00
OIL PUMP GEAR
R538465
OIL PUMP GEAR
R538465
OIL PUMP GEAR
Used
In Stock
$172.00
OIL PUMP GEAR
R538467
OIL PUMP GEAR
R538467
OIL PUMP GEAR
Used
In Stock
$80.00
PTO DRIVE SHAFT
RE163991
PTO DRIVE SHAFT
RE163991
PTO DRIVE SHAFT
Used
In Stock
$632.00
PTO HOUSING
R174698
PTO HOUSING
R174698
PTO HOUSING
Used
In Stock
$267.00
RING & PINION SET
RE220142
RING & PINION SET
RE220142
RING & PINION SET
Used
In Stock
$1,350.00
Rear Axle 4
Part #
Description
Condition
Stock
Price
AXLE PINION GEAR
R560122
AXLE PINION GEAR
R560122
AXLE PINION GEAR
Used
Out of Stock
AXLE PINION SHAFT
R560525
AXLE PINION SHAFT
R560525
AXLE PINION SHAFT
Used
Out of Stock
R168166.A
REAR AXLE ASSEMBLY
Used
Out of Stock
R168166.A
REAR AXLE ASSEMBLY
Reconditioned
In Stock
$17,500.00
Rear Differential 4
Part #
Description
Condition
Stock
Price
AXLE PINION GEAR
R560122
AXLE PINION GEAR
R560122
AXLE PINION GEAR
Used
Out of Stock
AXLE PINION SHAFT
R560525
AXLE PINION SHAFT
R560525
AXLE PINION SHAFT
Used
Out of Stock
DIFFERENTIAL CASE W/ GEARS
R174118.A
DIFFERENTIAL CASE W/ GEARS
R174118.A
DIFFERENTIAL CASE W/ GEARS
Used
In Stock
$2,750.00
RING & PINION SET
RE220142
RING & PINION SET
RE220142
RING & PINION SET
Used
In Stock
$1,350.00
Sheet Metal 1
Part #
Description
Condition
Stock
Price
REAR HUB ASSEMBLY
R192506.A
REAR HUB ASSEMBLY
R192506.A
REAR HUB ASSEMBLY
Used
Out of Stock
Steering 5
Part #
Description
Condition
Stock
Price
R537610
LOWER FRONT ARM - R.H.
Used
In Stock
$1,540.00
R135865.A.HD
MFWD CORNER ASSEMBLY - L.H.
Used
Out of Stock
PST GEAR
R163062
PST GEAR
R163062
PST GEAR
Used
In Stock
$737.00
STEERING CYLINDER - L.H.
RE178755
STEERING CYLINDER - L.H.
RE178755
STEERING CYLINDER - L.H.
Used
In Stock
$195.00
TIE ROD CAP
R549144
TIE ROD CAP
R549144
TIE ROD CAP
Used
In Stock
$28.00
Transmission 26
Part #
Description
Condition
Stock
Price
B-RANGE GEAR
R155980
B-RANGE GEAR
R155980
B-RANGE GEAR
Used
In Stock
$900.00
C DRIVER GEAR - COUNTERSHAFT
R163054
C DRIVER GEAR - COUNTERSHAFT
R163054
C DRIVER GEAR - COUNTERSHAFT
Used
Out of Stock
C-RANGE DRIVEN GEAR
R163055
C-RANGE DRIVEN GEAR
R163055
C-RANGE DRIVEN GEAR
Used
In Stock
$1,382.00
C1 CLUTCH GEAR
R162782
C1 CLUTCH GEAR
R162782
C1 CLUTCH GEAR
Used
In Stock
$476.00
C2 CLUTCH GEAR
R191848
C2 CLUTCH GEAR
R191848
C2 CLUTCH GEAR
Used
In Stock
$628.00
C2 DRIVER GEAR
R191849
C2 DRIVER GEAR
R191849
C2 DRIVER GEAR
Used
In Stock
$460.00
C4 CLUTCH GEAR
R152164
C4 CLUTCH GEAR
R152164
C4 CLUTCH GEAR
Used
In Stock
$711.00
CLUTCH PACK ASSEMBLY
R304385.A
CLUTCH PACK ASSEMBLY
R304385.A
CLUTCH PACK ASSEMBLY
Used
In Stock
$750.00
COMPLETE POWER SHIFT TRANSMISSION
R163966.A
COMPLETE POWER SHIFT TRANSMISSION
R163966.A
COMPLETE POWER SHIFT TRANSMISSION
Used
In Stock
$9,500.00
D-RANGE GEAR - OUTPUT SHAFT ASSEMBLY
R155981
D-RANGE GEAR - OUTPUT SHAFT ASSEMBLY
R155981
D-RANGE GEAR - OUTPUT SHAFT ASSEMBLY
Used
In Stock
$687.00
DRIVEN GEAR - 4TH SPEED
R152163
DRIVEN GEAR - 4TH SPEED
R152163
DRIVEN GEAR - 4TH SPEED
Used
In Stock
$444.00
OIL LINE
RE590589
OIL LINE
RE590589
OIL LINE
Used
In Stock
$46.00
OIL PUMP GEAR
R538465
OIL PUMP GEAR
R538465
OIL PUMP GEAR
Used
In Stock
$172.00
OIL PUMP GEAR
R538467
OIL PUMP GEAR
R538467
OIL PUMP GEAR
Used
In Stock
$80.00
PLANET PINION GEAR
R163057
PLANET PINION GEAR
R163057
PLANET PINION GEAR
Used
In Stock
$199.00
PLANETARY PIN
R163959
PLANETARY PIN
R163959
PLANETARY PIN
Used
In Stock
$23.00
PST GEAR
R162781
PST GEAR
R162781
PST GEAR
Used
In Stock
$654.00
PST OIL PUMP
R166900
PST OIL PUMP
R166900
PST OIL PUMP
Used
In Stock
$376.00
PST PLANET CARRIER
R163941
PST PLANET CARRIER
R163941
PST PLANET CARRIER
Used
In Stock
$658.00
PST SHAFT
RE175381
PST SHAFT
RE175381
PST SHAFT
Used
Out of Stock
PTO DRIVE SHAFT
RE163991
PTO DRIVE SHAFT
RE163991
PTO DRIVE SHAFT
Used
In Stock
$632.00
PTO HOUSING
R174698
PTO HOUSING
R174698
PTO HOUSING
Used
In Stock
$267.00
R163966
TRANSMISSION CASE
Used
In Stock
$5,005.00
TRANSMISSION CLUTCH ASSEMBLY
R155922.A
TRANSMISSION CLUTCH ASSEMBLY
R155922.A
TRANSMISSION CLUTCH ASSEMBLY
Used
In Stock
$550.00
TRANSMISSION OUTPUT SHAFT
RE163987
TRANSMISSION OUTPUT SHAFT
RE163987
TRANSMISSION OUTPUT SHAFT
Used
In Stock
$436.00
R163964
TRANSMISSION REAR COVER
Used
In Stock
$3,118.00
Wheels & Tires 4
Part #
Description
Condition
Stock
Price
R299784.A
DUAL HUB ASSEMBLY
Used
In Stock
$750.00
R299784.A
DUAL HUB ASSEMBLY
Used
In Stock
$750.00
R304356
REAR CAST WHEEL
Used
In Stock
$1,100.00
REAR HUB ASSEMBLY
R192506.A
REAR HUB ASSEMBLY
R192506.A
REAR HUB ASSEMBLY
Used
Out of Stock
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