190XT series 3 diesel timing

Tractor ran. But not right last Monday it drove into the shop. The tractor ran like a watch after the inframe but it sounded off and became very stubborn to start sense putting the cam in in October. When I removed the timing cover the pump drive gear slid out just to the point that the gear teeth did not mesh with the intermittent gear I looked for timing marks on the gear there were non so I slid it back in where I thought it came out but it must of been off a tooth or two. The tractor now required ether after being plugged in for 3 hours and the block was hot to the touch. Before the cam broke the tractor would start with no ether down to about 20 above with no ether not plugged in and would smoke a little white/light gray for about 5 minutes until warm then no smoke at all at 30 degrees last Monday it took heat a good amount of ether in multiple bursts and it smoked a lot of dark gray that smelled like unburnt fuel it smoked worse then my 7020 ever smokes that's what lead me to timing being off

So, your pump drive gear is missing the spring loaded button the keep it from moving forward changing gear mesh ??

The spring and nub is there the gear only slid out of mesh when the whole timing cover was removed