k0ua
Epic Contributor
He said he did NOT get 12 volts at the glow plug rail. He said he got .12 volts at the glow plug rail. Big difference in between 12 volts and .12 volts.
ck 25 glow plug relay ???
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LS Tractor Owner
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Also.... DO NOT USE STARTING FLUID ON A MODERN DIESEL! It will cause damage.
ETHER & STARTING FLUIDS IN DIESEL ENGINES
ARE STARTING FLUIDS SAFE TO USE IN DIESEL ENGINES?
With one exception starting fluids, including ether, should never be used in a diesel engine as there is an extremely high risk of detonation and the ensuing damage. If a diesel engine is hard to start in cold weather or requires ether to start, there is an obvious problem. In lieu of starting the engine with a blast of ether, appropriate diagnostics should be performed. A diesel engine requires proper fuel pressure, compression, and in many instances a functioning glow plug/intake heater system to start smoothly. Additionally, engine block heaters should be used appropriately in extremely cold conditions; they're there for a reason. If these systems are operating properly the engine should start without the need of a starting fluid.
STARTING FLUID/ETHER IN DIESEL ENGINES WITH GLOW PLUGS
Ether/starting fluid is also not compatible with any diesel engine that features glow plugs or any form of intake heater (grid heaters, intake air heaters, etc). The glowing red hot tip of a glow plug provides more than enough heat to ignite starting fluid mixtures. As in the aforementioned case, there is no way to control the combustion of this fuel as it enters the cylinder and detonation is likely to occur.
Modern diesel engines are designed for all weather operation, and thus it should NEVER be necessary to use starting fluid in the first place. If an engine will not start, there is an obvious malfunction or fault in one or more systems. In engines that are so equipped, a properly functioning glow plug system is necessary for easy starting in cold conditions. Fuel system maintenance is also important for starting ease in cold weather; low fuel pressure may hinder combustion in cold conditions due to poor atomization. Most, if not all diesel engines are equipped with block heater provisions, which allow the engine oil and/or engine coolant to be warmed prior to starting. These should be used to your advantage as they not only promote easier cold starts, but also protect your engine by reducing wet stacking and fuel dilution during the engine’s warm-up cycle.
....... the above article excerpts were taken From an article from "Diesel Hub". Here is a link to the full article:
Are Starting Fluids (Ether) Safe to Use in Diesel Engines
Sorry to sidetrack from the initial discussion.....
ETHER & STARTING FLUIDS IN DIESEL ENGINES
ARE STARTING FLUIDS SAFE TO USE IN DIESEL ENGINES?
With one exception starting fluids, including ether, should never be used in a diesel engine as there is an extremely high risk of detonation and the ensuing damage. If a diesel engine is hard to start in cold weather or requires ether to start, there is an obvious problem. In lieu of starting the engine with a blast of ether, appropriate diagnostics should be performed. A diesel engine requires proper fuel pressure, compression, and in many instances a functioning glow plug/intake heater system to start smoothly. Additionally, engine block heaters should be used appropriately in extremely cold conditions; they're there for a reason. If these systems are operating properly the engine should start without the need of a starting fluid.
STARTING FLUID/ETHER IN DIESEL ENGINES WITH GLOW PLUGS
Ether/starting fluid is also not compatible with any diesel engine that features glow plugs or any form of intake heater (grid heaters, intake air heaters, etc). The glowing red hot tip of a glow plug provides more than enough heat to ignite starting fluid mixtures. As in the aforementioned case, there is no way to control the combustion of this fuel as it enters the cylinder and detonation is likely to occur.
Modern diesel engines are designed for all weather operation, and thus it should NEVER be necessary to use starting fluid in the first place. If an engine will not start, there is an obvious malfunction or fault in one or more systems. In engines that are so equipped, a properly functioning glow plug system is necessary for easy starting in cold conditions. Fuel system maintenance is also important for starting ease in cold weather; low fuel pressure may hinder combustion in cold conditions due to poor atomization. Most, if not all diesel engines are equipped with block heater provisions, which allow the engine oil and/or engine coolant to be warmed prior to starting. These should be used to your advantage as they not only promote easier cold starts, but also protect your engine by reducing wet stacking and fuel dilution during the engine’s warm-up cycle.
....... the above article excerpts were taken From an article from "Diesel Hub". Here is a link to the full article:
Are Starting Fluids (Ether) Safe to Use in Diesel Engines
Sorry to sidetrack from the initial discussion.....
AchingBack
Veteran Member
That is an amazingly low price. I paid $98.00 for my Mahindra glow plug relay.
Kioti Paul
Silver Member
In his 3rd sentence he said "When I unplug the connector going from the relay to the gp's and turn the key I get batt voltage...." Battery voltage IS (for all practical purposes) 12 volts.
It is not until he plugs in the gp's that the voltage drops to .12 volts.
thanks again for all your reply's . the parts depot did find a relay , was over priced I'm sure but after replacing she fired right up . I'm thinking the GP has been burnt out for awhile as she fired up better than for a couple years.
when i was checking voltage . first I unplugged the wire from the harness going direct to the plugs , then reconnected and tested from the Gp with everything hooked up . tonight with the new relay I got 10.5 volts at the GP when I turned the key to run . hopes this will clear things up .
Thanks again for all the input it helps .
Kioti Paul
Silver Member
From trying to participate in some of the postings, I have found it to be VERY difficult to 'put on paper' exactly what I am thinking in my head! There will always be different interpretations of what any poster (is) was saying.
I think the best we all can do is to read the posts carefully; then give your opinion according to your understanding of what the problem is, while interpreting the poster's diagnostic steps as best you can.
If enough people participate, someone will interpret the clues correctly.
I think the best we all can do is to read the posts carefully; then give your opinion according to your understanding of what the problem is, while interpreting the poster's diagnostic steps as best you can.
If enough people participate, someone will interpret the clues correctly.
k0ua
Epic Contributor
That sounds exactly right. the glow plugs draw about 20 amperes each. so x3 equals about 60 amps. You can expect some voltage drop in the wiring to the GP relay, the GP relay contacts themselves and the wire coming from the GP relay to the GP buss. So about 60 amps at about 10.5 volts is about 630 watts of power being turned into heat by the GP's themselves. Nothing to sneeze at.
k0ua
Epic Contributor
Whoops, forgot one small piece of the puzzle. The internal resistance of the battery itself also contributes to the voltage drop from the resting voltage to the 10.5 volts measured on the glow plug buss during glow plug activation. Add it all up, and you are sucking "juice" out of the battery like it is going out of style. Good thing they just need to be activated for about 15 seconds.
CK25
New member
Hello,
sorry for pulling up this old thread but I have a 2005 CK 25 w/ 900+hrs with the same/similar issue; trouble starting in colder weather, where I am certain the glow plugs are not working or possibly the relay. I picked up a relay to swap but there are several on the firewall side of the engine bay that is the same 70amp relay type. I have swapped them around and it hasn't made a difference in the tractor starting in colder weather. If someone can point me to where the relay location is, it would be appreciated (and whether it is the Driver side or Engine Side)? thanks!
sorry for pulling up this old thread but I have a 2005 CK 25 w/ 900+hrs with the same/similar issue; trouble starting in colder weather, where I am certain the glow plugs are not working or possibly the relay. I picked up a relay to swap but there are several on the firewall side of the engine bay that is the same 70amp relay type. I have swapped them around and it hasn't made a difference in the tractor starting in colder weather. If someone can point me to where the relay location is, it would be appreciated (and whether it is the Driver side or Engine Side)? thanks!