2640 Pressure pump missing parts

The other day I posted about leaking hydraulic fluid around the pressure pump. I have taken the pump off and found one of the o rings in bad shape. I have a concern that I am missing some parts. where the big o Ring fits in from the diagram I have there should be another backup ring and a fittingthat went in the housing there was nothing there and I took it apart very carefully. Looks like the fitting screwed in. I can get the parts the only thing I was wondering is if someone took it out because where the hydraulic line comes out the back that should go to the coupler that was changed to add a loader. there is a hydraulic line comes out goes into a tee and a line goes to the coupler and another line goes into a control box where the loader hoses couple in. Anyone have any thoughts. Should I just get the new parts and replace. Thanks again for your help.
 

Are you referring to the pressure control valve that I posted some info for you the other day? If so pressure control valve & mounting area should contain the same parts/o-rings/backup washers no matter if tractor is equipped with frt end loader or not with exception for fittings to supply pressure to FEL control valve.

What's your tractors serial number?? I'll double check part numbers I previously posted.
 
Thanks for your help. I have talked to John deere and have Part key 14 fitting ordered and part key 13 backup ring R66085 also ordered. The fitting I presume screws in since the transmission housing has
threads in it. Any instruction on how far this tightens in. Thanks

Greg
 

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