push button start 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=174605
Printed Date: 18 Jun 2025 at 4:39am
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Topic: push button start switch
Posted By: tractorboy
Subject: push button start switch
Date Posted: 22 Sep 2020 at 6:06pm
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If a momentary push button start switch goes bad , can it make the starter turn slow ? How about the soleniod, I thought both either worked or nothing. This tractor has had 2 new batt. both checked good, Both new big cables clean & tight. Starter was rebuilt by same shop I been using for 20 yr. [never returned one]. Parts changing gets expensive for us shadetree mech.!!!! This is on my sons d-10 series3 Also I didn't think they put push button start switches on any series D-10. Thanks for any help, keith so. va,
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Replies:
Posted By: Tracy Martin TN
Date Posted: 22 Sep 2020 at 6:14pm
Jump across starter and see it turns slow or fast. I bet you have poor connection or ground somewhere. Tracy
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No greater gift than healthy grandkids!
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Posted By: Gary
Date Posted: 22 Sep 2020 at 6:49pm
My D-12 Ser. III has a Push Button Starter on the Dash.
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Posted By: Eric B
Date Posted: 22 Sep 2020 at 11:13pm
For everything you have done I would be suspicious of the solenoid but a bad push button switch can give a very poor supply of current to the solenoid as well. I am not a big fan of those solenoids as some get stuck in the engaged position also in which case it's a panic before you get the battery disconnected. Another crucial issue is the number of teeth on the starter drive. I know my Dad was dealing with that on his D10 some time back.
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Currently- WD,WC,3WF's,2 D14's B. Previously- I 600,TL745,200,FL9,FR12,H3,816 LBH. Earth has no sorrow that Heaven cannot heal!
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Posted By: MACK
Date Posted: 23 Sep 2020 at 5:16am
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If push button is bad, or low voltage, it won't engage starter. Voltage to spin starter has nothing to do with push button . MACK
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Posted By: Sugarmaker
Date Posted: 23 Sep 2020 at 5:59am
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I would beg to differ with MACK on this one. Recently my Ford Jubilee had been starting hard. Seemed like the battery was going bad. I inadvertently pushed the button starter at a slight different angle and it had twice the starting rpm. I assume the contacts are worn or corroded and were not allowing good current flow. Another little project to fix at some time too. This surprised me but I must admit it is starting good when I alter the push button switch pressure point. Regards, Chris
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D17 1958 (NFE), WD45 1954 (NFE), WD 1952 (NFE), WD 1950 (WFE), Allis F-40 forklift, Allis CA, Allis D14, Ford Jubilee, Many IH Cub Cadets, 32 Ford Dump, 65 Comet.
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Posted By: jaybmiller
Date Posted: 23 Sep 2020 at 6:18am
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possible but not probable. The dash switch only needs to supply a little current to fully turn on the solenoid. Even after 1,000s of pushes, it should be fine. Now the solenoid contacts have to carry 100s of amps for several seconds(20-40+-), full power to the starter. EVERY time it 'pulls in' a spark across the contacts happens, same as 'points'. Sadly the contacts aren't very high quality, so they will 'pit'. The more use, the more pits, the less power to the starter. It's one reason why it's better to 'turn and hold' instead of 'turn, try,turn ,try' the key several times. Always wondered how big a 'condenser' would be needed to quench the arc, as they do for 'points'.
Bottom line, I'd replace the solenoid.....
Jay
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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)
Never burn your bridges, unless you can walk on water
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Posted By: Clay
Date Posted: 23 Sep 2020 at 11:11am
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Our 180 diesel has a push button starter switch. The only problem I have had with the starter was the safety switch on the clutch. The clutch peddle must be fully depressed or the starter will not engage. All I had to do to fix the problem was to adjust the position of the safety switch.
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Posted By: Steve in NJ
Date Posted: 23 Sep 2020 at 11:38am
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Push buttons can go bad also. Lower voltage or not, the contacts can get cooked after long usage. Replaced a few of em' in boats, Tractors as well as heavy equipment. I absolutely agree with Jay about the Solenoid and the high current load that it has to handle to engage the Starter motor and spin the engine over. Mother Nature plays games with them also. Especially like the weather we've been having lately, at least around here. Its 78 degrees during the day, and the temps have been dropping to 36 over night. That plays havoc with electrical components because of moisture inside the component. I would bring the Starter motor into your rebuilder and let him do some load testing on the unit. If the Starter passes his expectations, go for a HD Starter solenoid replacement. Make sure when you reconnect your cables to the Solenoid that they are clean and tight. A little dab of Dielectric grease on the posts couldn't hurt either... HTH Steve@B&B
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39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife
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Posted By: tractorboy
Date Posted: 23 Sep 2020 at 1:34pm
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Thanks for the replies. Probably be this wk/end before I get to it. Eric, I've had that panic before on a KW. Panic is a good word, I had just off loaded a tanker of gas & I'm sure there were fumes everywhere!!!!
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