Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo Auction Link (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Farmall & IHC Tractors Discussion Forum
Order Farmall Cub Parts Online

Cub 154 ignition switch question

Welcome Guest, Log in or Register
Author 
888

07-11-2007 07:16:43




Report to Moderator

Hey all;
I redid some dash wiring on the 154 this weekend (the charging inidcator was bypassed) and when I tried to start, there was no response at all. I have good voltage at the battery, the rain started and I have not been able to go back out and check more. I suspect that the physical ignition switch (with key) is not working to provide voltage downstream to the starting switch, here's why. There was a loose ring terminal connection on one of the switch studs and when I tightened the nut down to secure the connection, the complete electrical (brown) half of the switch spun around inside the silver outer housing. I assume that this is not a good thing and I have broken whatever connections exist between the key and the electrical terminals. Anyone else ever had this happen?

thanks

[Log in to Reply]   [No Email]
Janicholson

07-11-2007 11:50:16




Report to Moderator
 Re: Cub 154 ignition switch question in reply to 888, 07-11-2007 07:16:43  
Your assessment is likely correct. (it is a potential fire strter as well) Take it apart enough to get at it and repair, JimN



[Log in to Reply]  [No Email]
888

07-11-2007 17:45:37




Report to Moderator
 Re: Cub 154 ignition (now wiring) switch question in reply to Janicholson, 07-11-2007 11:50:16  
Thanks for the input. I swapped it out tonight and while examining the old switch and the replacement switch, I noticed a difference. The old switch had BAT IGN ACC molded on the 3 lower terminals and ST with an arrow on the central "tower" terminal (like a coil terminal on a distributor). The new switch only had the BAT IGN and ACC marked, no ST. The schematic does not mention an ACC position but the key can go to the left to what would be an ACC position on an older car ignition. I was thinking this may be a "universal" ignition switch with an ACC option. When I got the tractor, the wiring was a mess but I clearly recall there was no wiring to the central tower terminal. Is that central terminal the starter terminal? I wired it that way and still no sign of life. However, when I got the tractor the charging meter was bypassed, I may need to replace that to get current flow to the starter switch, I assume the current must flow through the charging indicator to get to the starter switch? For right now, everything is wired as per the schematic and there is no sign of life. Thanks for any comments or advice.
Joe

[Log in to Reply]  [No Email]
Janicholson

07-13-2007 10:01:29




Report to Moderator
 Re: Cub 154 ignition (now wiring) switch question in reply to 888, 07-11-2007 17:45:37  
Sorry for the delayed response.
If it has no ST terminal, it probably does not have a spring loaded start position as the key turns! thus it is either the wrong switch, or the unit had a push button starter switch to make the starter solenoid operate. Battery terminal should be attached to (if it were mine) a 35 amp inline fuse holder and fuse. then to the hot side (battery side) of the soleniod. The Ignition terminal should go to the coil (or ballast resistor if so equipped). The Acc terminal is not used unless you have a radio or other device you need to operate while the ign is off. Leave it empty. Without a starter terminal a starter button (momentary contact weatherproof push button) should be connected to the bat terminal of the key, and the start (S) terminal of the solenoid.

If it has an alternator, the indicator light should be wired to the Ign terminal on the key (I think) JimN

[Log in to Reply]  [No Email]
888

07-13-2007 11:27:25




Report to Moderator
 Re: Cub 154 ignition (now wiring) switch question in reply to Janicholson, 07-13-2007 10:01:29  
Thanks for the reply, Jim. The key switch (old and new) does have a spring loaded return from start to run. I think the problem is that the later molds don't have the ST mark, they must assume that we know the unmarked one is the starter. Other that this missing ST molded on the center post, they are identical.

I have a generator with a charge indicator rather than an alternator. The charge indicator was bypassed when I got it by the PO wiring the red leads in and out of the charge indicator together along with the red lead from the 8 pin connector to the BAT terminal. I am told it ran like this for a few years and last fall until it wouldn't start this year. It was thought mice got into the wiring.

I wired it all back to the way it's shown on the schematic and I've traced most everything down and tightened/cleaned all contacts. I'm missing the inline fuse and holder between the light and dark green leads off of the 8 pin connector. I'll need to replace that, I guess. Can i use a modern standard plastic bladed fuse and holder? That's what I was planning on but I can use a glass barrel.

I saw a starter safety switch on the schematic and finally traced it down last night under the rear fender where it senses the position of the PTO lever. There are two wires that are part of the starting circuit, orange and orange/black. Both were off of the switch. One of the wires was broken off back by the PTO with half laying on the PTO and the broken end was riding on the metal body. I'll need to rewire that too. I wonder if this is what shut it down. Does it need this contact to start? No indication if it's normally open or normally closed.

If all this doesn't work, I'll need to find a new charge indicator. I did notice that the insulating laminate on the back of the charging indicator was cracked by the screw terminal and ready to fall off so i guess I'll install something to insulate that before springing for another one.

Good thing I didn't pay much for this, I'm getting a lot of time in it. thanks for the help.

[Log in to Reply]  [No Email]
Janicholson

07-14-2007 10:50:09




Report to Moderator
 Re: Cub 154 ignition (now wiring) switch question in reply to 888, 07-13-2007 11:27:25  
Make sure there is power (test light) comming from the ST terminal (with no ST marked on it) when the key is in this position.

The neutral safety switch is normally closed and in series with the starter solenoid to the start terminal mentioned above. If the interlock safety sw is ruined, the two wires going to it can be wired together (realize it will start with the PTO running, as all tractors before our litigeous society became aware of the nature of idiot operators) I do nt have this tractor, nor have I been around one or looked at a book, My diagnosis is purely experience on mobile technology from 1955 till now, (born in '49) JimN

[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums


Copyright © 1997-2023 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy