John Deere 50D Rubber Tracks & Parts

The John Deere 50D is listed with more than one build of the same 400 mm track. Match link count to what is on the machine now. Free freight to the lower 48, 24-month warranty.

John Deere 50D track options

• 400x72.5Nx74 — 400 mm (16") wide, 72.5 mm pitch, 74 links, narrow guide lugs
• 400x72.5Wx74 — 400 mm (16") wide, 72.5 mm pitch, 74 links, wide guide lugs

Same tread width on all of them — what changes is pitch and link count, which is set by the sprocket and roller frame. Read the numbers off the inside of the old track rather than going by model year; these were built across more than one undercarriage spec.

Tread choice for the John Deere 50D

Size gets the track on the machine; tread decides how it works and how long it lasts. What we stock for this one:

• All-Terrain — everything in between. A compromise tread when the machine moves between surfaces
• MX — mixed and hard surfaces. A durable general-duty excavator tread

If the machine splits its time between surfaces, buy for the ground you are on most — a hard-surface tread on constant mud will spin, and a bar tread on concrete will wear out in half the hours.

John Deere 50D at a glance

• Operating weight — 9,270 lb
• Engine — 39 hp

Undercarriage parts for the John Deere 50D

Rollers, idlers and sprockets wear on the same clock as the track. Fitting new rubber over a hooked sprocket or a seized roller is the fastest way to lose the new track — check these while the tracks are off:

• Drive sprocket — 2054978
• Front idler — 9318048, 9237507
• Bottom roller — 9239528, 9239528S
• Carrier roller — 4718355, 9239529

Where more than one part number is listed, John Deere changed that component across serial ranges. Match the number stamped on the part you are replacing, or send us the machine serial and we will pick it.

How these wear

Excavator undercarriages load one side hard on slew and travel, so link cracking usually shows up before the tread wears out. Replace in pairs where you can: a new track running against a stretched one loads the drive unevenly and you will feel it in the steering.

Same track, other machines

Track size follows undercarriage geometry, not brand, so one of these sizes shows up on machines from several makers. If you run any of these alongside the John Deere 50D, it is the same belt:

• Airman AX58
• Airman AX58MU
• Bobcat 337
• Bobcat 337D
• Bobcat 337G
• Bobcat 341
• Bobcat 341D
• Bobcat 341G
• Bobcat 435
• Bobcat 435ZHS-FASTTRACK

Not sure which you are running? Read the size off the inside of the old track, or call (850) 816-7898 and we will pull it off the machine record. The Track Finder works by make and model too.

More John Deere undercarriage

• John Deere 15
• John Deere 17D
• John Deere 17G
• John Deere 17P
• John Deere 17ZTS
• John Deere 26D
• All John Deere tracks & parts