D-15 Series I industrial Intake manifold heater
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Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=113258
Printed Date: 25 Jul 2025 at 3:57pm
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Topic: D-15 Series I industrial Intake manifold heater
Posted By: JamesG
Subject: D-15 Series I industrial Intake manifold heater
Date Posted: 13 Oct 2015 at 6:25pm
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Well it is getting cold and I realize that I do not know anything about starting my D15 in cold weather. Below is a picture of the intake manifold. Do these typically have intake manifold air heaters (and am I missing some critical wiring in the photo? I know nothing about these so if someone can tell me the basics I would appreciate it. I assume there should be wiring that goes back to a switch on the console. I was taught in general that either is bad for diesels and should be avoided if possible, so I assume a manifold heater is an important component. Thanks for the help.   
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Replies:
Posted By: DMiller
Date Posted: 13 Oct 2015 at 9:15pm
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My 180 diesel tractor has a intake air heater, pretty well a useless device. Engine has to be very close to new internal condition, the fuel system has to be perfect in delivery and the machine plugged in with a block heater for it to function enough to make a difference. My engine e is weak, blowby is notable out the draft tube, I did just have the injector pump rebuilt but the nozzles have many hours on them but the block heater is fairly new and functions so a dash of starter fluid and off we go to work in the cold. At less than 40 degrees F it almost always takes a shot of ether to get it running. You do not want the air preheater operational if using ether. |
Posted By: Eric B
Date Posted: 13 Oct 2015 at 11:17pm
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Moderate use of ether will not hurt your engine. The first ether can I bought 35 years ago said "spray 3 - 5 seconds" and for a small diesel that's crazy in my opinion. By the time you say "one thousand and one" one second has past...even that is a lot of ether out of a fresh can. If you have a big and tired diesel in cold weather you'll soon find out what it takes to wake it up (their instruction might apply). It won't take much to start your D15 diesel (try very small squirts), I used to have a backhoe just like yours. Just like DMiller said when everything was new that glow plug was useful help in colder weather but I wouldn't bother reinstating it if it was my machine. ------------- 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! |
Posted By: DiyDave
Date Posted: 14 Oct 2015 at 4:59am
| James, the air horn pre-heater looks like a big spark plug. It takes a small battery cable run to a solenoid, and a switch wire run to the dash. On my old D-19, the solenoid was there, along with the switch wire, just had them disconnected, cause it had auto ether system. I just used the auto ether switch, which was on the dash, push and hold button, center of dash. I think the way the switch was supposed to be wired, was to the left side of the key, twist left and hold to glow. I think your pre heater is there, left of center of your picture, the thing with a nut on it left of the ether port. Don't glow if using ether, BOOOOM... |
Posted By: SteveM C/IL
Date Posted: 14 Oct 2015 at 12:51pm
| Crack throttle,turn on fuel(very important)and start cranking while simultaneously giving 1/2 second bursts of ether at the air pipe.Little sniffs will get it going and you will soon know how much sniffing it needs.Just don't get crazy with the ether. |
Posted By: JamesG
Date Posted: 14 Oct 2015 at 3:44pm
| Thanks! It sounds like I should forget about repairing the manifold air heater and go with small amounts of ether. |
Posted By: Coke-in-MN
Date Posted: 14 Oct 2015 at 4:28pm
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have engine turning over - then short puff of either to intake while cranking over and short puff after it turns over on it's own. ------------- Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something. "Challenges are what make life interesting; overcoming them is what makes life meaningful." |