4020 Hydraulic Pump Question

1. Does the entire pump need to be taken apart to replace the seal in the front of it or can it be done from the front by removing the snap ring.

2. If it is the packing that failed behind the seal, can it simply be repacked (if the shaft is worn)?

3. Any pointers for taking this out? For sure does the pump need to fully come out or any other work saving tips? Thanks

2.) Replacing the outside seal (#9) is PROBABLY only a temporary fix, as there is an "O"-ring, (#19) DEEP inside the steering valve. Rebuilding that valve is NOT for the faint of heart, or the inexperienced, and the number of DEERE mechanics every-day familiar with the setup procedure is dwindling.

3.) To do the job correctly, the valve has to come out of the dash, then be disassembled.

4.) Since I am basically lazy, I WOULD try the external seal FIRST, unless the tractor is being torn down for a major restoration, or it is absolutely critical that that leak be stopped the first try! Good Luck!