T20334 R97758 Fan Belt Fits John Deere 820 1020 1520 2020 2040 2240 ++ Tractors

What This Is

This is a new aftermarket fan and alternator drive belt, John Deere part number R97758. It is a raw-edge cogged (notched) V-belt built on a polyester tension cord. The notched underside lets the belt flex tightly around small pulleys while holding steady tension, which keeps the engine fan and the alternator turning without slip or squeal. It replaces a worn, cracked, or glazed original belt and is a routine maintenance and service item on the John Deere machines listed below.

Fitment

R97758 is primarily a utility-tractor belt. It fits John Deere tractors including the 820 (serial number 75345 and up), 830, 1020, 1520, 1530 (with Motorola alternator), 2020, 2030 (diesel), 2040 (serial number up to 349999), 2130, 2240 (serial number up to 340999), and 2440 (serial number up to 350000). Beyond tractors, the same belt is used on John Deere 2250, 2270, 2280, 2320, and 2420 windrowers/swathers, on 300-series industrial and backhoe loader units, and on the 202 engine. Because several of these models have serial-number breaks and alternator-brand variations, the surest check is to compare this belt against the belt you are removing.

Specifications

The belt has a top width of about 0.69 inch (17.48 mm), a thickness of about 0.41 inch (10.31 mm), and an effective length of 48.5 inch (1232 mm), which works out to roughly a 49-1/4 inch outside length. That puts it in the cogged B-section range. Construction is raw-edge cogged with a polyester cord for strength and consistent tension.

What Is Included

One (1) fan/alternator drive belt. Pulleys, tensioners, and hardware are not included.

Cross-Reference

This belt is a direct replacement for John Deere R97758 and supersedes the earlier John Deere number T20334. A common aftermarket equivalent is A&I A-R97758. R97758 also carries over to a number of non-John Deere OEM belt numbers of the same section and length. Any numbers shown are for reference only to help you confirm the correct belt.

Ordering Guidance

Fan belts are sized by section and length, and several of the machines this belt covers have serial-number splits or different alternator setups. Before ordering, match this belt to your old belt by top width (about 17 mm), by length (about 48.5 inch effective), and by section (cogged B). On tractors with serial breaks, confirm your serial number falls within the ranges noted above. When the section and length match, R97758 is the correct fan and alternator drive belt for your John Deere.