I need help to work out how to assemble the hi/low control lever cover on a JD2140 with SG cab. We had to remove the top of the gear box to adjust the transmission pressure as it was low. However in the process the balls on the detent on the pto lever have dislodged. I am having problems assembling it as there are 4 ball bearings, springs, etc that have to be installed all at once. Looks impossible to assemble it as too many things to do at the same time. JD manual no help. Can anyone give me a clue how to do it. Why do they make it so difficulty when will a little more effort they could make it impossible! Hope someone can help.