skipping D17 IV
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=37751
Printed Date: 08 Sep 2025 at 2:32pm
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Topic: skipping D17 IV
Posted By: Stan R
Subject: skipping D17 IV
Date Posted: 22 Sep 2011 at 7:17pm
Engine has a slight skip to it. New points, plugs, condenser, wires and the engine still has the skip. The distributor rotor has some level of movement to it when I move it back and forth- in fact, I would say the points open maybe another 0.020" when the distributor shaft is moved in the direction of the points open/ close position. Think the distributor needs a rebuild? How much "wiggle" is allowed? Don't recall greasing the shaft below the rotor body. Thanks for your input.
Stan
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Replies:
Posted By: DrAllis
Date Posted: 22 Sep 2011 at 8:11pm
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Ignition timing is set where??
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Posted By: Stan R
Date Posted: 22 Sep 2011 at 8:24pm
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Unsure. Need to take the loader frame off to get to the peep hole. What should it be at what rpm?
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Posted By: DrAllis
Date Posted: 22 Sep 2011 at 8:29pm
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F-25 on the flywheel in the center of the hole at wide open throttle. I'll bet you're too fast on timing.
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Posted By: DSeries4
Date Posted: 22 Sep 2011 at 8:43pm
The shaft is not supposed to be greased (should not have a zerk there).
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'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080
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Posted By: DaveKamp
Date Posted: 22 Sep 2011 at 9:19pm
I think the Dr. is right... and I'll bet the slop is part, if not most or all, of the reason.
Do you have another distributor available to swap in temporarily?
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Posted By: Brian Jasper co. Ia
Date Posted: 22 Sep 2011 at 10:48pm
A loose dist shaft causes unstable dwell and timing. A trick I was told by an old time A-C dealer is drive the bushing out of the housing. Cut it in half, reverse the two halves and put them back. The bushing is usually less worn in the center so cutting it in half and turning the pieces around will probably help. In reality this is 'cobbling', but sometimes we got to work with what's available...
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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford
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Posted By: Stan R
Date Posted: 23 Sep 2011 at 7:46am
Thanks all. I will pursue all your suggestions.
Appreciated
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Posted By: Gary in da UP
Date Posted: 23 Sep 2011 at 8:14am
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A pertronix ignition conversion will tolerate a worn shaft, as the module will trigger the spark without an air gap that the points need . I had a rather sloppy shaft on a WD45 that a pertronix electronic module worked very well with, much cheaper than I could have the distributor rebuilt. Use 3.5 ohm coil. If later you find a better distributor, You will like the pertronix anyway for its hotter spark and no points/ condenser to maintain.
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Posted By: BobHnwO
Date Posted: 23 Sep 2011 at 8:42am
Set timing by ear,turn dist.to retard,then advance till it just starts to labor.
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Why do today what you can put off til tomorrow.
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