I have a DK45, so it probably is not exactly the same, however the schematic does show pins 30 & 85 (as well as pins 86 and 87).
Jumping between 30 and 85 will bypass the relay, so it seems to me that you have proven the relay is bad. This is not uncommon, there are many threads discussing bad relays.
Although the tractor is starting fine with the relay bypassed, you are now drawing considerably more amperage through your ign. switch than it was designed for, so you may be setting yourself up for more expensive repairs later.
These relays are (apparently) common automotive relays available at any auto parts stores. Good luck!