Description
When you spot coolant puddles under your John Deere 2155 or 5500, or notice the temperature gauge climbing during heavy work, it’s usually this water pump that’s calling it quits. A failing pump doesn’t just mean overheating—it can lead to expensive engine damage if you keep pushing through. This cast iron replacement pump with its 6.25-inch single-groove pulley gets your cooling system back to doing what it’s supposed to do: keeping that diesel engine running cool and reliable.
What You’re Getting
- Cast iron construction that handles the heat cycles and vibration of diesel engine operation
- Single groove 6.25-inch pulley that matches your original equipment specifications
- Designed specifically for diesel engines on early 2155 and 5500 models
- Direct replacement for John Deere casting numbers R70437, R78286, and R100812
Built for Real Farm Work
This pump fits John Deere 2155 tractors built before serial number 751023 and 5500 models before serial number 248699. These are solid utility tractors that typically handle loader work, hay operations, and general farm chores. Whether you’re moving round bales, running a bush hog, or doing daily feeding, proper cooling keeps your tractor working through those long summer days.
Made to Last
Cast iron pumps like this one are built for the long haul. They handle the constant heat cycles from cold morning starts to full operating temperature, plus all the vibration that comes with tractor work. The bearing and seal design is matched to original specifications, so you get the reliability John Deere engineered into these machines.
Installation Notes
This is a direct bolt-in replacement using your existing mounting hardware. Drain the cooling system completely before starting, and clean the mounting surface thoroughly to ensure a good gasket seal. When you refill, go slow to avoid air pockets, and run the engine with the cap off until the thermostat opens to make sure you’ve got all the air out.
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