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jd 70 puller 10-25-2012 19:06:30 69.129.13.198 Report to Moderator	when installing an lp distributor in a 70 what is the proper steps? Which lobe on the distributor shaft is for #1, the small lobe or the longer lobe? Why do they have one lobe so the points stay open so long? why not they both the same? Thanks for all your help. [Reply]   [No Email]
buickanddeere 10-26-2012 09:34:28 184.151.63.137 Report to Moderator	Re: jd 70 lp distributor installation questions in reply to jd 70 puller, 10-25-2012 19:06:30   The confusion starts with the 70 turning the distributer shaft at crank speed instead of at cam speed. This makes the gasser and all fuel 70 fire on both the compression stroke and exhaust stroke. 50,60 and 70 distributors on LP engines are geared to turn at cam rpms [Reply]  [No Email]
Wilamayb 10-25-2012 20:04:00 75.253.223.127 Report to Moderator	Re: jd 70 lp distributor installation questions in reply to jd 70 puller, 10-25-2012 19:06:30   I'm not sure what the book says but you can do it in this fashion.. Put the left cylinder at TDC on compression stroke. Pull the spark plug out and feel as you are rolling the engine so as not to confuse TDC exhaust stroke with the compression stroke. There is a sight window on your flywheel cover that will allow you to see the scribe marks on your flywheel to identify TDC. After finding TDC install your distributor with the rotor pointing as close to the 2 o'clock position as possible. Now orient your distributor housing so that the top pole of the cap is touching the rotor. Wire up the distributor and run the top wire to the LH cylinder and the bottom wire to the RH cylinder. With Ignition turned on and LH cylinder still at TDC, have LH plug wire In such a fashion that you can check for spark. Rotate the distributor housing counter clockwise a quarter turn then arrange your top (LH) wire so that you can check for spark. Slowly rotate the distributor housing clockwise as you are watching for the spark. As soon as you see the spark stop rotating the distributor. This now has No. 1 spark occurring while No. Cylinder is at TDC compression stroke. You can check timing with a light after you get it fired up, but this should at least get it close enough to start. Be careful not to advance timing too far on an lp engine. It can break the crankshaft. It was enough of a problem that Deere put out a service bulletin about retarding the timing on existing lp tractors. If I had my bulletins wiyh me I would look it up but I don't. I think the advancement was changed from 35 to 25 degrees before TDC at wide open throttle but don't hold me to that.. Look it up. [Reply]  [No Email]
jd70puller 10-26-2012 06:49:24 70.40.234.47 Report to Moderator	Re: jd 70 lp distributor installation questions in reply to Wilamayb, 10-25-2012 20:04:00   Explain the top pole on the cap, are you talking the inside brass pole on the inside of cap? How come one lobe is so much longer than the other on the shaft where the points hit? Intersted in seeing service bulletin. thanks. [Reply]  [No Email]
Vern H 10-26-2012 08:18:33 75.211.20.191 Report to Moderator	Re: jd 70 lp distributor installation questions in reply to jd70puller, 10-26-2012 06:49:24   Hi jd70puller, The lobes on the dist. cam are spaced funny cause these 2 cyls fire 180 deg. apart and then loaf thru the rest of the 540 deg for one complete cycle. Thats why they sound so cool. Good luck, VH [Reply]  [No Email]