John Deere 644D Parts
8 categories · 40 total parts
Keep your John Deere 644D running with quality replacement parts from Eastman Ag Parts. We stock 40+ parts across 8 categories — from Air Conditioning Parts, Cooling Systems, Engine Overhaul Kits, Engine Parts — all sourced to OEM specifications. Same-day shipping before 2 PM ET from Eastman, GA.
John Deere644D
ALL 6.466D 6CYL ENG
CAMSHAFTEAP-104697
Fits John Deere 4000, 4020, 4040, 4050, 4240, 4240S, 4250, 4320...
Ready to Ship
$405.99
Ships to your addressFree shipping
THERMOSTAT 180'EAP-105044
Fits John Deere 110, 120, 120C, 160LC, 200LC, 230LC, 2630, 2640...
Ready to Ship
$13.99
Ships to your addressFree shipping
VOLTAGE REGULATOREAP-105170
Fits John Deere 300D, 3020, 310D, 315D, 340D, 4000, 4020, 4030...
Ready to Ship
$11.99
Ships to your addressFree shipping
ALL ESN 302868->
INJECTOR (NEW)EAP-105402
Fits John Deere 4450, 4630, 4640, 4650, 644D, 790, 790D, 792...
Ready to Ship
$130.99
Ships to your addressFree shipping
RESISTOR; BLOWER MOTOREAP-105550
Fits John Deere 1640, 2040, 2040S, 210C, 2140, 2350, 2550, 2750...
Ready to Ship
$10.99
Ships to your addressFree shipping
1986- 1988 W/ MOTOROLA
ALTERNATOR NEWEAP-105718
Fits John Deere 210C, 210LE, 31, 3103, 3104, 3108, 3109, 310C...
Ready to Ship
$394.99
Ships to your addressFree shipping
ALL SN: 512189 >
GAUGE TEMPERATUREEAP-105723
Fits John Deere 340D, 350, 350B, 350C, 350D, 355D, 380, 410B...
Ready to Ship
$138.99
Ships to your addressFree shipping
SN: 512189 >
GAUGE VOLTMETEREAP-105724
Fits John Deere 444D, 544D, 5730, 5830, 643, 643D, 644D, 653E, 653G
Ready to Ship
$86.99
Ships to your addressFree shipping
ALL ESN <336698
COOLER OILEAP-105946
Fits John Deere 4050, 4250, 444, 4440, 4450, 4630, 4640, 4650...
Ready to Ship
$226.99
Ships to your addressFree shipping
ISOLATER (RUBBER)EAP-105983
Fits John Deere 444, 444C, 444CH, 444D, 544, 544A, 544B, 544C...
Ready to Ship
$65.99
Ships to your addressFree shipping
SWITCH PRESSUREEAP-106100
Fits John Deere 1020, 1040, 1140, 1350, 1520, 1550, 1640, 1750...
Ready to Ship
$11.99
Ships to your addressFree shipping
BEARING WATER PUMP STYLEEAP-131839
Fits John Deere 1104, 1204, 1270D, 1354, 1470D, 1710D, 4050, 4055...
Ready to Ship
$44.99
Ships to your addressFree shipping
BEARING BALLEAP-132100
Fits John Deere 444, 444C, 444CH, 444D, 544, 544A, 544B, 544C...
Ready to Ship
$18.99
Ships to your addressFree shipping
CLUTCH 1GEAP-141408
Fits John Deere 2355, 2555, 2755, 2855N, 2955, 300D, 3055, 310C...
Ready to Ship
$171.99
Ships to your addressFree shipping
MANIFOLD-SUCTIONEAP-141409
Fits John Deere 2355, 2555, 2755, 2855N, 2955, 300D, 3055, 310C...
Ready to Ship
$48.99
Ships to your addressFree shipping
MANIFOLD-DISCHARGEEAP-141410
Fits John Deere 2355, 2555, 2755, 2855, 2955, 300D, 3055, 310C...
Ready to Ship
$63.99
Ships to your addressFree shipping
COMPRESSOR DENSOEAP-141432
Fits John Deere 2250, 2355, 2450, 2555, 2650, 2755, 2850, 2855N...
Ready to Ship
$541.99
Ships to your addressFree shipping
SOLENOIDEAP-141448
Fits John Deere 3020, 340D, 344E, 4000, 4020, 4030, 4040, 4050...
Ready to Ship
$62.99
Ships to your addressFree shipping
TURBOCHARGEREAP-141591
Fits John Deere 4250, 4350, 4430, 4450, 4630, 4640, 4650, 4840...
Ready to Ship
$562.99
Ships to your addressFree shipping
PUMP FUELEAP-141613
Fits John Deere 4050, 4055, 4250, 4440, 4450, 4455, 4640, 4650...
Ready to Ship
$149.99
Ships to your addressFree shipping
FREEZE PLUG HEATER; 1 5/8EAP-141706
Fits John Deere 2250, 2350, 2355, 2450, 2550, 2555, 2630, 2650...
Ready to Ship
$218.99
Ships to your addressFree shipping
FUEL LINE; LEAK-OFFEAP-141836
Fits John Deere 4040, 4040S, 4050, 4240, 4240S, 4250, 4440, 4450...
Ready to Ship
$115.99
Ships to your addressFree shipping
PLATE BRAKEEAP-142120
Fits John Deere 4000, 4020, 4055, 4230, 4255, 4430, 4455, 544B...
Ready to Ship
$234.99
Ships to your addressFree shipping
CRANKSHAFT W/GEAREAP-142472
Fits John Deere 4000, 4010, 4020, 4040, 4050, 4055, 4230, 4240...
Ready to Ship
$2493.99
Freight requiredFreight only
ALL 6.466D 6CYL ENG
MAJOR OVERHAUL KITEAP-142907
Fits John Deere 4440, 4640, 4840, 5720, 6, 6.466A, 644D, 646A...
Ready to Ship
$1938.99
Ships to your addressFree shipping
GASKET; THERMOSTAT COVEREAP-143377
Fits John Deere 330LCR, 4050, 4055, 4240, 4250, 4255, 4320, 4430...
Ready to Ship
$6.99
Ships to your addressFree shipping
792DLC
PLUG OIL PAN DRAINEAP-143706
Fits John Deere 3020, 4000, 4010, 4020, 4040, 4050, 4230, 4240...
Ready to Ship
$21.99
Ships to your addressFree shipping
MANIFOLD EXHAUST (REAR)EAP-144078
Fits John Deere 4050, 4050E, 4240S, 4250, 4350, 4430, 4440, 4450...
Ready to Ship
$154.99
Ships to your addressFree shipping
TUBE OIL COOLER BYPASSEAP-144187
Fits John Deere 4040, 4040S, 4050, 4055, 4230, 4240, 4240S, 4250...
Ready to Ship
$34.99
Ships to your addressFree shipping
STUD; 3/8" X 1-1/2"EAP-144414
Fits John Deere 4050, 4240, 4250, 4320, 4430, 4440, 4450, 4520...
Ready to Ship
$8.99
Ships to your addressFree shipping
ALL 6466 ENGINE
MANIFOLD EXHAUST (FRONT)EAP-144466
Fits John Deere 4050, 4050E, 4240S, 4250, 4350, 4430, 4440, 4450...
Ready to Ship
$249.99
Ships to your addressFree shipping
CAPSCREW CONN ROD 3"EAP-144616
Fits John Deere 1177, 1188, 1270D, 1470D-Wheeled, 3010, 3020...
Ready to Ship
$4.99
Ships to your addressFree shipping
GASKET WATER PUMPEAP-144656
Fits John Deere 4050, 4055, 4250, 4255, 4450, 4455, 4555, 4560...
Ready to Ship
$2.99
Ships to your addressFree shipping
W/MOTOROLA 1986-88
12V65ANMO/PREAP-147961
Fits John Deere 210C, 210LE, 31, 3103, 3104, 3108, 3109, 310C...
Ready to Ship
$346.99
Ships to your addressFree shipping
STEERING WHEELEAP-148257
Fits John Deere 1020, 1520, 1530, 2020, 2030, 2040, 210C, 2240...
Ready to Ship
$61.99
Ships to your addressFree shipping
Hydraulic Cylinder Seal Kit, John Deere AH212096EAP-198902
Fits John Deere 210C, 210LE, 310C, 310D, 310E, 310G, 310SE, 310SG...
Ready to Ship
$94.99
Ships to your addressFree shipping
Water Pump, John Deere RE55985EAP-198946
Fits John Deere 4050, 4055, 4250, 4255, 4450, 4455, 4555, 4560...
Ready to Ship
$245.99
Ships to your addressFree shipping
Engine Heater, John Deere DZ102076EAP-204875
Fits John Deere 210C, 2250, 2350, 2355, 2450, 250D, 2550, 2555...
Ready to Ship
$205.99
Ships to your addressFree shipping
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No Image
FUEL/WATER SEPARATOREAP-125798
Fits John Deere 1170, 1654, 1854, 344E, 444C, 444D, 444E, 444G...
Ready to Ship
$62.99
Ships to your addressFree shipping
[ ]
No Image
FUEL/WATER SEPARATOREAP-126030
Fits John Deere 1170, 1654, 1854, 344E, 444C, 444D, 444E, 444G...
Ready to Ship
$57.99
Ships to your addressFree shipping
Frequently Asked Questions — John Deere 644D Parts
What John Deere 644D parts does Eastman Ag Parts carry?▾
Eastman Ag Parts stocks 40+ quality replacement parts for the John Deere 644D across 8 categories, including Air Conditioning Parts, Cooling Systems, Engine Overhaul Kits, Engine Parts. We carry parts for engine, drivetrain, hydraulic, electrical systems, and more.
How fast does Eastman Ag Parts ship John Deere 644D parts?▾
Orders placed before 2 PM ET ship the same business day. We ship from Eastman, GA and most continental US customers receive their John Deere 644D parts within 2–5 business days. Orders over $299 under 25 lbs qualify for free shipping.
Are John Deere 644D parts OEM quality?▾
Yes. All John Deere 644D parts sold by Eastman Ag Parts meet or exceed OEM specifications. Family-owned since 1974, we stand behind every part we sell with a 30-day hassle-free return policy.
Where can I find John Deere 644D Air Conditioning Parts parts?▾
Browse John Deere 644D Air Conditioning Parts parts at eastmanagparts.com/john-deere/644d?cat=air-conditioning-parts.
Where can I find John Deere 644D Cooling Systems parts?▾
Browse John Deere 644D Cooling Systems parts at eastmanagparts.com/john-deere/644d?cat=cooling-systems.
Where can I find John Deere 644D Engine Overhaul Kits parts?▾
Browse John Deere 644D Engine Overhaul Kits parts at eastmanagparts.com/john-deere/644d?cat=engine-overhaul-kits.
Where can I find John Deere 644D Engine Parts parts?▾
Browse John Deere 644D Engine Parts parts at eastmanagparts.com/john-deere/644d?cat=engine-parts.