Posted 6/11/2013 10:34 (#3149725 - in reply to #3149608) Subject: Re: JD 30, 40 and 50 series tractors
Same basic hydraulic system across the board. Tractors with front assist got the larger 4 cubic inch per rev pump vs the standard 3 cubic inch per rev pump. Some 2wds may have had the larger pump installed at some point. No easy way to tell unless you can find a casting number or serial plate on the pump.
50 and 55 series have ISO quick couplers where 30 and 40 series have JD couplers unless updated.
JD 30, 40 and 50 series tractors
