JD Diesel Injection Pump

My little (Early) JD 2240 is puking diesel into the crankcase. I replaced the fuel transfer pump first hoping for a cheap ($100) fix with no success. So I've pulled all fuel lines & the three taps holding the Inj pump on. The pump still won't come off. It feels as though the gear or shaft refuses to come loose. As I see it on JDPARTS.com, It should come off. Any ideas or suggestions? Thanks very much, Stephen