Is your John Deere 4440 due for maintenance? Choose from more than 170 parts that fit, from lighting and trailer couplings to engine parts for the 40 series.
Keeping a John Deere 4440 in daily use often comes down to a stop cable that moves freely, injection nozzles with a clean spray pattern and wiring without a sticking relay. More than 170 replacement parts fit this model, made by GRANIT and by HELLA, GRAMMER, BOSCH and VICTOR REINZ.
For the fuel side there are injection nozzles, a stop cable and a lockable tank cap with a vent. That vent gets overlooked. When it blocks, the tank goes into vacuum and after a while the engine starves of diesel. If your 4440 dies after an hour of work and restarts after a short wait, loosen the tank cap first and listen for air rushing in.
Around the engine you will find thermostats, gaskets such as the turbocharger oil return line gasket, and seals for parts like the rear engine cover. VICTOR REINZ gaskets and sealing rings round off an overhaul.
Injection nozzles are best replaced as a set. An engine that smokes black, starts poorly or runs rough often has a nozzle that dribbles instead of atomising. Always fit new copper washers under the nozzles, or compression blows past and the holder is leaking again within a week.
Anyone driving a 4440 on the road needs working headlights, brake lights and indicators. For that there are HELLA headlights with dipped and main beam, a brake light switch and a flasher unit. Also relays and a solenoid switch for the starter. On the brake side there is an O-ring for the master brake cylinder.
The serial plate tells you whether it really is a 4440. Within the John Deere line-up it sits in the 40 series. Where parts changed during production, the serial number on the plate helps you pick the right one. If the old part still carries a number, on an injection nozzle or a thermostat for example, compare it with the details shown with the product.
From the same 40 series, the John Deere 1640, John Deere 2040S, John Deere 3640, John Deere 4040 and John Deere 4240 each have a page with the parts that fit them. Handy if you keep several of these green classics side by side. All models from the brand are listed under John Deere parts.
