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I am in the process of rebuilding the fuel pump on my M37. I can't seem to get the actuating lever to insert into the tab on the diaphragm. Should I re-install the lever and then push down on the diaphragm to try to engage or vise versa?

Sorry for the late post-I've not had to do this job so I cannot offer any expertise. Can someone give XD any guidance?
Thanks,
Gary

I don't have photos to post showing the technique, but this might help (assuming that xd2200 has the original style double-acting fuel and vacuum pump): http://blog.gieselman.com/post/M37-Fuel-pump-rebuild