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6.303 O-rings in Block

From Engine Serial Number 158,976
Bore: 3.86 in (98mm)

Pin Diameter: 1.1878 in (30mm)

Block marked: R53260, R55035, R55351, R72970, R79280, T32346
Connecting rod marked: T20007, R81410
Piston marked: T23481

Agricultural: 3420
Construction Model: 540, 544

Displaying products 1 - 81 of 81 results
John Deere 6.303 Engine Inframe Overhaul Rebuild Kit, Late
Our Price: From $949.80 to $1,018.69
John Deere 6.303 Engine Inframe Overhaul Rebuild Kit, Late
From Engine Serial Number 158,976
free shipping
John Deere 6.303 Engine Inframe Overhaul Rebuild Kit, Late, Absolute
Our Price: From $846.42 to $952.99
John Deere 6.303 Engine Inframe Overhaul Rebuild Kit, Late, Absolute
From Engine Serial Number 158,976
free shipping
John Deere 6-303 Overhaul Kit, FP Diesel
John Deere 6-303 Overhaul Kit, FP Diesel, Late
MSRP: $1,574.21
Our Price: $1,499.25
You Save: $74.96 (5 %)
John Deere 6-303 Overhaul Kit, FP Diesel, Late
From Engine Serial Number 158,976
free shipping
John Deere Cylinder Kit, AR71591
MSRP: $146.83
Our Price: $110.12
You Save: $36.71 (25 %)
John Deere Cylinder Kit, AR71591
Piston, T23481
John Deere Cylinder Sleeve, T32340
MSRP: $61.41
Our Price: $46.05
You Save: $15.36 (25 %)
John Deere Cylinder Sleeve, T32340
replaces: T32340
John Deere Liner Sealing Ring Kit, AR71617
MSRP: $8.07
Our Price: $6.05
You Save: $2.02 (25 %)
John Deere Liner Sealing Ring Kit, AR71617
replaces: AR71617
John Deere Piston, T23481
MSRP: $63.88
Our Price: $47.91
You Save: $15.97 (25 %)
John Deere Piston, T23481
replaces: T23481
John Deere Piston Ring Set, 1 cylinder set, AR70633
MSRP: $21.39
Our Price: $16.04
You Save: $5.35 (25 %)
John Deere Piston Ring Set, 1 cylinder set, AR70633
replaces: AR70633
John Deere Piston Pin, T23482
MSRP: $11.34
Our Price: $8.51
You Save: $2.83 (25 %)
John Deere Piston Pin, T23482
Pin Diameter: 1.1878 in
John Deere Piston Pin Retainer, R51112
MSRP: $4.37
Our Price: $1.70
You Save: $2.67 (61 %)
John Deere Piston Pin Retainer, R51112
replaces: R51112
John Deere Main Bearing, Standard, RE27352
MSRP: $12.97
Our Price: $9.72
You Save: $3.25 (25 %)
John Deere Main Bearing, Standard, RE27352
Standard
John Deere Thrust Main Bearing, Standard, AT21139
MSRP: $32.26
Our Price: $24.19
You Save: $8.07 (25 %)
John Deere Thrust Main Bearing, Standard, AT21139
Standard
John Deere Main Bearing, .010, RE27353
MSRP: $12.97
Our Price: $9.72
You Save: $3.25 (25 %)
John Deere Main Bearing, .010, RE27353
.010 (.25mm)
John Deere Thrust Main Bearing, .010, AT21132
MSRP: $32.26
Our Price: $24.19
You Save: $8.07 (25 %)
John Deere Thrust Main Bearing, .010, AT21132
.010 (.25mm)
John Deere Main Bearing, .020, RE27360
MSRP: $12.97
Our Price: $9.72
You Save: $3.25 (25 %)
John Deere Main Bearing, .020, RE27360
.020 (.50mm)
John Deere Thrust Main Bearing, .020, AT21134
MSRP: $32.26
Our Price: $24.19
You Save: $8.07 (25 %)
John Deere Thrust Main Bearing, .020, AT21134
.020 (.50mm)
John Deere Main Bearing, .030, RE27368
MSRP: $12.97
Our Price: $9.72
You Save: $3.25 (25 %)
John Deere Main Bearing, .030, RE27368
.030 (.75mm)
John Deere Thrust Main Bearing, .030, AT21136
MSRP: $32.26
Our Price: $24.19
You Save: $8.07 (25 %)
John Deere Thrust Main Bearing, .030, AT21136
.030 (.75mm)
John Deere Rod Bearing, Standard, RE27348
MSRP: $9.20
Our Price: $6.90
You Save: $2.30 (25 %)
John Deere Rod Bearing, Standard, RE27348
Standard
John Deere Rod Bearing, .010, RE27349
MSRP: $9.20
Our Price: $6.90
You Save: $2.30 (25 %)
John Deere Rod Bearing, .010, RE27349
.010 (.25mm)
John Deere Rod Bearing, .020, RE27358
MSRP: $9.20
Our Price: $6.90
You Save: $2.30 (25 %)
John Deere Rod Bearing, .020, RE27358
.020 (.50mm)
John Deere Rod Bearing, .030, RE27364
MSRP: $9.20
Our Price: $6.90
You Save: $2.30 (25 %)
John Deere Rod Bearing, .030, RE27364
.030 (.75mm)
John Deere Head Gasket, R98462
MSRP: $77.66
Our Price: $58.24
You Save: $19.42 (25 %)
John Deere Head Gasket, R98462
replaces: R98462
John Deere Head Gasket Set, RE38571
MSRP: $138.16
Our Price: $122.21
You Save: $15.95 (12 %)
John Deere Head Gasket Set, RE38571
replaces: RE38571
John Deere Oil Pan Gasket, R97344
MSRP: $17.37
Our Price: $13.03
You Save: $4.34 (25 %)
John Deere Oil Pan Gasket, R97344
replaces: R97344
John Deere Full Gasket Set, without crank seals, RE38568
MSRP: $198.15
Our Price: $148.61
You Save: $49.54 (25 %)
John Deere Full Gasket Set, without crank seals, RE38568
replaces: RE38568
John Deere Front Crank Seal, AR67942
MSRP: $8.35
Our Price: $6.27
You Save: $2.08 (25 %)
John Deere Front Crank Seal, AR67942
Do not use with Flywheel Housing marked T20300, T22991
John Deere Rear Crank Seal, RE44574
MSRP: $27.59
Our Price: $20.70
You Save: $6.89 (25 %)
John Deere Rear Crank Seal, RE44574
Do not use with flywheel housings marked T20300, T22991
John Deere Air Inlet Gasket, R81275
MSRP: $2.19
Our Price: $1.65
You Save: $0.54 (25 %)
John Deere Air Inlet Gasket, R81275
John Deere Valve Cover Gasket, R75728
MSRP: $22.51
Our Price: $16.88
You Save: $5.63 (25 %)
John Deere Valve Cover Gasket, R75728
replaces: R75728
John Deere Valve Cover Gasket, T20467
MSRP: $4.14
Our Price: $3.11
You Save: $1.03 (25 %)
John Deere Valve Cover Gasket, T20467
replaces: T20467
John Deere Exhaust Manifold Gasket, R83021
MSRP: $2.36
Our Price: $1.77
You Save: $0.59 (25 %)
John Deere Exhaust Manifold Gasket, R83021
John Deere Fuel Pump Gasket, R27285
MSRP: $3.41
Our Price: $1.32
You Save: $2.09 (61 %)
John Deere Fuel Pump Gasket, R27285
replaces: R27285
John Deere Oil Pump Outlet Sealing Ring, R74354
MSRP: $1.40
Our Price: $0.60
You Save: $0.80 (57 %)
John Deere Oil Pump Outlet Sealing Ring, R74354
replaces: R74354
John Deere Oil Supply Tube O-Ring, R75892
MSRP: $5.75
Our Price: $2.00
You Save: $3.75 (65 %)
John Deere Oil Supply Tube O-Ring, R75892
Sold per seal
John Deere Teflon Seal, AR101238
MSRP: $7.09
Our Price: $5.31
You Save: $1.78 (25 %)
John Deere Teflon Seal, AR101238
Sold per seal
John Deere Thermostat Gasket, R54641
MSRP: $5.12
Our Price: $2.00
You Save: $3.12 (61 %)
John Deere Thermostat Gasket, R54641
John Deere Thermostat Gasket, T24932
MSRP: $4.22
Our Price: $2.09
You Save: $2.13 (50 %)
John Deere Thermostat Gasket, T24932
replaces: T24932
John Deere Connecting Rod, AT18005
MSRP: $88.32
Our Price: $66.24
You Save: $22.08 (25 %)
John Deere Connecting Rod, AT18005
30mm pin diameter
John Deere Connecting Rod Bolt, R74194
MSRP: $2.84
Our Price: $2.13
You Save: $0.71 (25 %)
John Deere Connecting Rod Bolt, R74194
Use with connecting rods marked T20007
John Deere Piston Pin Bushing, T23471
MSRP: $8.68
Our Price: $6.51
You Save: $2.17 (25 %)
John Deere Piston Pin Bushing, T23471
Pin Diameter: 1.1878 in
John Deere Camshaft Kit, RE53884
MSRP: $397.98
Our Price: $298.48
You Save: $99.50 (25 %)
John Deere Camshaft Kit, RE53884
Camshaft is for threaded type tach drive shaft
John Deere Camshaft, R82821
MSRP: $272.33
Our Price: $261.98
You Save: $10.35 (4 %)
John Deere Camshaft, R82821
Threaded Type rear hole for tach drive
John Deere Valve Lifter, T20073
MSRP: $10.47
Our Price: $7.85
You Save: $2.62 (25 %)
John Deere Valve Lifter, T20073
replaces: T20073
John Deere Camshaft Gear, T20070
MSRP: $83.92
Our Price: $78.15
You Save: $5.77 (7 %)
John Deere Camshaft Gear, T20070
replaces: T20070
John Deere Idler Bushing, T20034
MSRP: $5.99
Our Price: $4.49
You Save: $1.50 (25 %)
John Deere Idler Bushing, T20034
Upper
John Deere Idler Bushing, T26321
MSRP: $8.16
Our Price: $6.12
You Save: $2.04 (25 %)
John Deere Idler Bushing, T26321
Lower
John Deere Idler Gear, AT18009
MSRP: $94.69
Our Price: $71.02
You Save: $23.67 (25 %)
John Deere Idler Gear, AT18009
Upper
John Deere Idler Gear, AT24252
MSRP: $85.22
Our Price: $63.91
You Save: $21.31 (25 %)
John Deere Idler Gear, AT24252
Lower
John Deere Crankshaft, AT22562
MSRP: $1,465.51
Our Price: $1,316.05
You Save: $149.46 (10 %)
John Deere Crankshaft, AT22562
Casting Numbers: A102, A102R, AT22562, F1910R, F2729R, F2792R, F3315R, F3560R, F3561R, R108658, R108679, R26550, R26550R, R40730, RE45541, T23264T, T23299T, T23480T, T23517T, T23266T
John Deere Crankshaft Gear, T20094
MSRP: $68.04
Our Price: $51.03
You Save: $17.01 (25 %)
John Deere Crankshaft Gear, T20094
Helical gear
John Deere Exhaust Valve, R79624
MSRP: $10.40
Our Price: $7.80
You Save: $2.60 (25 %)
John Deere Exhaust Valve, R79624
Standard stem, 45 degree
John Deere Exhaust Valve, R79625
MSRP: $10.40
Our Price: $7.80
You Save: $2.60 (25 %)
John Deere Exhaust Valve, R79625
.003 oversize stem, 45 degree
John Deere Exhaust Valve, R79626
MSRP: $10.40
Our Price: $7.80
You Save: $2.60 (25 %)
John Deere Exhaust Valve, R79626
.015 oversize stem, 45 degree
John Deere Intake Valve, R79623
MSRP: $8.90
Our Price: $6.68
You Save: $2.22 (25 %)
John Deere Intake Valve, R79623
Standard stem, 45 degree
John Deere Intake Valve, R79628
MSRP: $8.90
Our Price: $6.68
You Save: $2.22 (25 %)
John Deere Intake Valve, R79628
.003 oversize stem, 45 degree
John Deere Intake Valve, R79629
MSRP: $8.90
Our Price: $6.68
You Save: $2.22 (25 %)
John Deere Intake Valve, R79629
.015 oversize stem, 45 degree
John Deere Valve Spring, R26125
MSRP: $2.65
Our Price: $1.98
You Save: $0.67 (25 %)
John Deere Valve Spring, R26125
replaces: R26125
John Deere Valve Keeper, T20077
MSRP: $1.40
Our Price: $0.60
You Save: $0.80 (57 %)
John Deere Valve Keeper, T20077
replaces: T20077
John Deere Valve Seat, R51734
MSRP: $11.15
Our Price: $8.37
You Save: $2.78 (25 %)
John Deere Valve Seat, R51734
Exhaust
John Deere Valve Seat, R73064
Our Price: $8.21
John Deere Valve Seat, R73064
Intake, 30 degree
John Deere Valve Rotator, RE11410
MSRP: $9.03
Our Price: $6.77
You Save: $2.26 (25 %)
John Deere Valve Rotator, RE11410
Sold per rotator
John Deere Valve Seal, R87627
MSRP: $2.22
Our Price: $0.95
You Save: $1.27 (57 %)
John Deere Valve Seal, R87627
Sold per seal
John Deere Valve Stem Cap, T20129
MSRP: $4.99
Our Price: $3.49
You Save: $1.50 (30 %)
John Deere Valve Stem Cap, T20129
Sold per cap
John Deere Oil Cooler, RE31929
MSRP: $166.87
Our Price: $130.68
You Save: $36.19 (22 %)
John Deere Oil Cooler, RE31929
donut type, 90 degree connections
John Deere Oil Pump, RE55343
MSRP: $178.11
Our Price: $133.58
You Save: $44.53 (25 %)
John Deere Oil Pump, RE55343
4 bolt back plate, double bend tube required, 1.625" gears
John Deere Oil Cooler Tube Sealing Ring, R61871
MSRP: $2.48
Our Price: $0.97
You Save: $1.51 (61 %)
John Deere Oil Cooler Tube Sealing Ring, R61871
Use with pump RE55343
John Deere Oil Pump Cover, R53382
MSRP: $12.29
Our Price: $11.30
You Save: $0.99 (8 %)
John Deere Oil Pump Cover, R53382
John Deere Oil Pump Tube, R113752
MSRP: $9.53
Our Price: $7.14
You Save: $2.39 (25 %)
John Deere Oil Pump Tube, R113752
Use with pump RE55343
John Deere Water Pump Repair Kit, MX132
MSRP: $58.95
Our Price: $54.42
You Save: $4.53 (8 %)
John Deere Water Pump Repair Kit, MX132
with impeller
John Deere Water Pump Repair Kit, RE19510
MSRP: $66.32
Our Price: $49.74
You Save: $16.58 (25 %)
John Deere Water Pump Repair Kit, RE19510
without impeller
John Deere Thermostat, AR77411
MSRP: $80.38
Our Price: $76.83
You Save: $3.55 (4 %)
John Deere Thermostat, AR77411
195 degrees
John Deere Fuel Injector, AR89564
MSRP: $51.99
Our Price: $39.00
You Save: $12.99 (25 %)
John Deere Fuel Injector, AR89564
pencil
John Deere Fuel Injector Packing, R48000
MSRP: $3.72
Our Price: $1.45
You Save: $2.27 (61 %)
John Deere Fuel Injector Packing, R48000
replaces: R48000
John Deere Fuel Injector Packing, R79605
MSRP: $1.78
Our Price: $1.33
You Save: $0.45 (25 %)
John Deere Fuel Injector Packing, R79605
minimum order qty 20
John Deere Fuel System Grommet Kit, MX506
MSRP: $8.32
Our Price: $6.24
You Save: $2.08 (25 %)
John Deere Fuel System Grommet Kit, MX506
6 cylinder
John Deere Fuel Lift Transfer Pump, RE42211
MSRP: $47.04
Our Price: $39.80
You Save: $7.24 (15 %)
John Deere Fuel Lift Transfer Pump, RE42211
John Deere Fuel Line Connector Kit, AR85618
MSRP: $8.58
Our Price: $6.44
You Save: $2.14 (25 %)
John Deere Fuel Line Connector Kit, AR85618
replaces: AR85618
John Deere Fuel Line Connector Kit, AT27622
MSRP: $5.59
Our Price: $4.20
You Save: $1.39 (25 %)
John Deere Fuel Line Connector Kit, AT27622
replaces: AT27622
John Deere Fuel Line Connector Nut, R51937
MSRP: $2.65
Our Price: $2.25
You Save: $0.40 (15 %)
John Deere Fuel Line Connector Nut, R51937
replaces: R51937
John Deere Flywheel Ring Gear, R114282
MSRP: $35.46
Our Price: $26.60
You Save: $8.86 (25 %)
John Deere Flywheel Ring Gear, R114282
142 Teeth