My little guy does not start readily even doing 20 'Mississippis'. I need to test the glowplugs. Anyopne got the ohms I should be reading at the plug? I assume full battery voltage is also expected.
Thanks!
Thanks!
BX25D Glow Plugs
- Thread starter William1
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85Hokie
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BX-25D ,PTB. Under Armor, '90&'92-B7100HST's, '06 BX1850 FEL
unhook the leads at the top.
set VOM to ohms.
Take one lead to the top and the other to ground
you should read around 1 ohm if good!
1 Ohm, so nearly 100% resistance. Huh.... I would of guessed it would be 10 to 100 times that. At one Ohm, that is a near short.
JimDeL
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GreensvilleJay
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BX23-S,57 A-C D-14,58 A-C D-14, 57 A-C D-14,tiller,cults,Millcreek 25G spreader,
1 ohm is not 'nearly 100% resistance'. It's just a low value....
I've got resistors from .01 ohms to 100 Megohms in the 'shack'.....
Those glowplugs are designed for 10 volts, so about 10 watts of power. Connect to 1 volt, only get kinda,maybe warmish...
I've got resistors from .01 ohms to 100 Megohms in the 'shack'.....
Those glowplugs are designed for 10 volts, so about 10 watts of power. Connect to 1 volt, only get kinda,maybe warmish...
85Hokie
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BX-25D ,PTB. Under Armor, '90&'92-B7100HST's, '06 BX1850 FEL
That's not quite right. 10 volts across 1 ohm will net 10 amps, and power is volts times current. The glow plugs would be around 100 watts.
But that doesn't tell the whole story. 100 watts focused into a small point will be hotter than 100 watts over more material. Think of a 100 watt light bulb filament vs 100 watt space heater coil. Glow plugs focus the energy to the tip, and are not designed to be "warmish". Every diesel glow plug I've bench tested gets bright red to almost white hot. I actually just bench tested mine for the coming winter and verified they get extremely hot after 10 seconds. A bad glow plug would either take a long time to heat up, or won't reach an effective max temp to efficiently ignite fuel.
GreensvilleJay
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BX23-S,57 A-C D-14,58 A-C D-14, 57 A-C D-14,tiller,cults,Millcreek 25G spreader,
it'd be nice if I had 100% of the nerves in my finger( unskilsaw event) .miss a few keypresses here and there. Also need trifocals to read screen, type and look down th eroad...getting old sucks !
editted my post.....
editted my post.....
If... after testing Ohms, I find one out of spec, I'll get a replacement and then for fun, do the bench test of the questionable one.
I assume (I've never seen one IRL) that it is not an exposed coil but contained in a shell so carbon build up is a non-issue.
The only 'glow plugs' I have screwed around with were ones from model airplanes 50 years ago. Diesel ones are no doubt 100X more robust. I do seem to recall a video with the glow plug out and the tip, white hot.
The plugs are basically a metal stick. They sometimes swell from the heat so they might not pull out cleanly/easily and need to be slowly twisted out. Careful not to bend them because the end can break and fall into the cylinder.
Example plug, majority look similar to this.
Example plug, majority look similar to this.
Yes.
They also do not need to be torqued down very hard. If they do not break loose relatively easy, don't force it. It's not unheard of to snap the hex head off the body of a glow plug, leaving the rest stuck in the engine. There are specific hammer socket type tools that make removing stuck glow plugs easier.
whitetiger
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Kubota tech..BX2370, RCK60, B7100HST, RTV900 w plow, Ford 1100 FWA
The spec for the glowplugs in a BX25D is approx .9 ohms.
The voltage supplied to the glowplugs is battery voltage straight from the key switch, it is NOT reduced to 10 volts.
The voltage supplied to the glowplugs is battery voltage straight from the key switch, it is NOT reduced to 10 volts.
Well! I got off of my enormous posterior and went out to the shed. First one I went at was the one that the power wire was at (back of the engine towards the operators station). Loose!!!!! Like not even close to finger tight. My first thought was that it was broken as it was so loose. No... can't be..... I checked the rest, nice and tight. Hmmmm Tighten up the loose one. Key in on preheat. G'damn! Fired up faster than ever, leads me to think it has ALWAYS been loose.
Simplest things.
Thanks for tolerating me fellas!
Simplest things.
Thanks for tolerating me fellas!