Description
When your early-production John Deere 8020 Series tractor starts squealing under load or the temp gauge starts climbing, there’s a good chance your serpentine belt is calling it quits. This specific 8PK1785 belt is made just for 8120-8520 models with early serial numbers that don’t have air brakes—getting the wrong length means problems from day one.
What You’re Getting
- 8-rib design built to handle 225-335 horsepower without slipping
- 1785mm length that’s precisely sized for early serial number configurations
- EPDM rubber construction that resists cracking, stretching, and heat damage
- Direct fit for tractors up to S/N 023918 (standard) or 903262 (T-Series)
- Specifically engineered for non-air brake equipped models
Built for Real Farm Work
Your early 8020 Series represents serious farming power, whether you’re running an 8320 with deep tillage, pulling a large square baler with an 8420T, or operating grain handling equipment with an 8520. This belt keeps your cooling fan spinning during those long, hot days in the field, maintains alternator output for all the electronics, and drives the hydraulic cooling system that prevents costly overheating when you’re running implements hard.
Made to Last
The 8-rib construction gives you maximum contact with the pulleys for slip-free power transfer, even when you’re pushing these tractors to their limits. EPDM construction outlasts regular rubber by fighting off the three main killers: heat-induced cracking, stretching that kills tension, and rib wear from millions of flex cycles.
Good to Know
This is critical—verify your serial number falls below 023919 (standard) or 903263 (T-Series) and confirm you don’t have air brakes before ordering. Later tractors use different belt lengths entirely. When installing, use proper tools to release that automatic tensioner—these high-tension systems can hurt you if handled wrong. While you’ve got the belt off, check all those pulleys for wear and clean out any debris from the grooves.
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