D17 Diesel Ignition Switch
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=212316
Printed Date: 24 Sep 2026 at 4:35pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: D17 Diesel Ignition Switch
Posted By: Coke
Subject: D17 Diesel Ignition Switch
Date Posted: 22 Sep 2026 at 10:57pm
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Does anyone have a pin out for the D17 Diesel ignition key switch? I'm wondering if it has a position for the glow in the intake etc. Right now it has no stops, it just turns til the start position and then back, there's a voltage leak, so I leave the battery disconnected.   ------------- 1957 D17 Diesel w/ M&W Pistons |
Replies:
Posted By: steve(ill)
Date Posted: 23 Sep 2026 at 8:23am
Coke, my old service manual shows the D15 Series II having the heater solenoid wire built into the key switch.... the OLDER D15- 17 wire diagram shows the switch giving power to a HEATER BUTTON , which you then have to manually PUSH to energize the heater.... so the question is, do you have a BUTTON ?? .. and is your D17 a series 1 or 2.. or possibly the series 4 had the key like the D15 Series 2 ?? ------------- Like them all, but love the "B"s. |
Posted By: steve(ill)
Date Posted: 23 Sep 2026 at 8:27am
this shows the earlier models with the BUTTON.. ------------- Like them all, but love the "B"s. |
Posted By: SteveM C/IL
Date Posted: 23 Sep 2026 at 8:27pm
| Funny how they did things. My 220 has a push button for starter and you twist key to right to energize heater |
Posted By: Leadoff
Date Posted: 23 Sep 2026 at 11:48pm
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Coke I purchased a D17 III Diesel a few years ago and it had the ignition switch set up to have the push button energize the manifold heater, with the key in the on position. Ignition key to full clockwise would crank the engine I changed the wiring to be the same as my factory 185, key to on position - push button will crank the engine, key full clockwise will energize the manifold heater. Personal preference, either setup got the job done The D17 IV and 185 operating manuals suggest keeping the manifold heater energized when cranking the engine over, in colder starting conditions to improve starting the engine I have not used this procedure. I plug in the block heater on either tractor and use the manifold heater for about a minute and that is enough for starting Perhaps if one decided to keep the manifold heater energized when cranking the engine one of these configurations would be easier to execute???????? The safety switch / push button to energize a motor is a standard industrial design feature. I feel it is a very safe way to start the tractor Hope this info helps you with your D17 Diesel ------------- 1963 D17D Series III. 1965 D15 Series II. 1965 D17 Series IV. 1975 185. 1978 716H. 1979 716H. 1965 780 Harvester/1R&DC. 1957 Model 73 SC 4 Furrow Plow |