How to repair a MB/GPW fuel gauge. Lots of pics
- YLG80
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Re: How to repair a MB/GPW fuel gauge. Lots of pics
For a complete information on fuel gauge repair, here is a picture of an Early Fuel gauge in restoration.
The general principle is the same, but the 2 coils positions are different.
The picture shows the gauge in a mid position (1/2 full)
Yves
The general principle is the same, but the 2 coils positions are different.
The picture shows the gauge in a mid position (1/2 full)
Yves
Ford GPW 1943 - Louisville - DoD 12-7-43
serial 164794
serial 164794
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Re: How to repair a MB/GPW fuel gauge. Lots of pics
Hello,
the value between the two connectors is 38 so i think it's ok but the value between the left connector and the brass li is 51...isn't it too much?
Pleas let me know i it's ok or not
the value between the two connectors is 38 so i think it's ok but the value between the left connector and the brass li is 51...isn't it too much?
Pleas let me know i it's ok or not
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Re: How to repair a MB/GPW fuel gauge. Lots of pics
Great post thanx
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Re: How to repair a MB/GPW fuel gauge. Lots of pics
ok, so I tried this, and broke my glass while doing so. anyone know of a vendor who could sell me the glass and the rubber(ish) gasket? Id love to keep this thing vintage and original as can be.
Chuck
Chuck
83 CJ7 full-bore rock crawler
53 CJ3A farm/hunting rig
45 GPW being restored
53 CJ3A farm/hunting rig
45 GPW being restored
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Re: How to repair a MB/GPW fuel gauge. Lots of pics
Good morning all,
This is a subject about which several of us (non-electricians) are scratching our heads at this very moment, so your help would be greatly appreciated.
Here in France, we have 6v, 12v and 24v jeeps.
The spare parts Dealers have 6v and 12v dashboard gauges (not 24v), and only one sort of gas-tank transmitter which is supposed to work with all 3 voltages.
The Dealers tell us that gauge and transmitter must be matched.
What is your verdict on the following questions please :-
1- can a gauge marked 6v work properly with a 12v or 24v circuit ?
2- can a gauge marked 12v work properly with a 6 or 24v circuit ?
3- can the tank transmitter work properly with any of 6,12 or 24v circuits ?
4- must the gauge and transmitter be matched ? If so, how is this done ?
Many thanks for your help in solving these "froggy questions" !
John
This is a subject about which several of us (non-electricians) are scratching our heads at this very moment, so your help would be greatly appreciated.
Here in France, we have 6v, 12v and 24v jeeps.
The spare parts Dealers have 6v and 12v dashboard gauges (not 24v), and only one sort of gas-tank transmitter which is supposed to work with all 3 voltages.
The Dealers tell us that gauge and transmitter must be matched.
What is your verdict on the following questions please :-
1- can a gauge marked 6v work properly with a 12v or 24v circuit ?
2- can a gauge marked 12v work properly with a 6 or 24v circuit ?
3- can the tank transmitter work properly with any of 6,12 or 24v circuits ?
4- must the gauge and transmitter be matched ? If so, how is this done ?
Many thanks for your help in solving these "froggy questions" !
John
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Re: How to repair a MB/GPW fuel gauge. Lots of pics
Gidday,JLR wrote:Good morning all,
This is a subject about which several of us (non-electricians) are scratching our heads at this very moment, so your help would be greatly appreciated.
Here in France, we have 6v, 12v and 24v jeeps.
The spare parts Dealers have 6v and 12v dashboard gauges (not 24v), and only one sort of gas-tank transmitter which is supposed to work with all 3 voltages.
The Dealers tell us that gauge and transmitter must be matched.
What is your verdict on the following questions please :-
1- can a gauge marked 6v work properly with a 12v or 24v circuit ?
2- can a gauge marked 12v work properly with a 6 or 24v circuit ?
3- can the tank transmitter work properly with any of 6,12 or 24v circuits ?
4- must the gauge and transmitter be matched ? If so, how is this done ?
Many thanks for your help in solving these "froggy questions" !
John
anybody here who could give answers to JLR's interesting questions? I'm most interested in question no. 4.
Would be glad to get some information. Thanks.
Eckhard
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Re: How to repair a MB/GPW fuel gauge. Lots of pics
EXCELLENT Post.
Bringing it back to life...
Bringing it back to life...
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Re: How to repair a MB/GPW fuel gauge. Lots of pics
The tank sender unit is a variable resistance. This resistance, if it goes from 0 to x Ohm, should work equally well on 12 V and 6 V. They don't, though. There's always some resistance in them, and they can never cut/"resist" 100% of the voltage.
The gauge should be voltage-specific.
The gauge should be voltage-specific.
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Re: How to repair a MB/GPW fuel gauge. Lots of pics
Thanks for all that!
My insulator washers came apart on disassemble
Any way to get more.
Also they go on the inside of the gauge correct?
My insulator washers came apart on disassemble
Any way to get more.
Also they go on the inside of the gauge correct?
RICH
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Re: How to repair a MB/GPW fuel gauge. Lots of pics
Hi,I have repaired this FG and after multy-meter testing theese ere the results
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Re: How to repair a MB/GPW fuel gauge. Lots of pics
Does anyone know if you need the insulated clamp in the back? The rings that go around the posts on the clamp have disintegrated. Additionally, anyone know how to recreate the insulators?
1942 GPW
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Re: How to repair a MB/GPW fuel gauge. Lots of pics
Yes, they are necessary to prevent the wires from grounding out or shorting instead of going to the "meter" part of the gauge (the coil).
-Jeff
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Re: How to repair a MB/GPW fuel gauge. Lots of pics
I got very similar resistance readings on a NOS gauge.
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Re: How to repair a MB/GPW fuel gauge. Lots of pics
My test readings after repairing the gauge are very similar to Trifido,s but the needle still jumps to FULL when installed in the Jeep. Is this likely to be an earthing issue in the dash or is that 85.8 ohms reading on one post to body an issue? Any thoughts?
Cheers
Sean.
Cheers
Sean.
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Re: How to repair a MB/GPW fuel gauge. Lots of pics
Hi Sean,
I would opt for a grounding problem.
• If your gauge is permanently stuck on the full mark it most likely is not making electrical contact with the dash panel .
->A clean metal to metal contact between the gauge body and dash panel is needed to provide a current path for coil B to ground at X on the circuit . • If the pointer is jumping upwards towards the full mark there may be some paint or rust causing a intermittent path to ground at X .
• Conversely if you have a dirty or intermittent ground connection at the sender unit your gauge will jump around or be permanently stuck on empty.
You first need to be sure that the gauge is grounded correctly internally. When I repair a gauge, I usually add a ground wire soldered between the gauge and the housing.
Then you need to be sure that your gauge is correctly grounded to the dash panel.
Check also if your sender is correctly grounded.
Yves
I would opt for a grounding problem.
• If your gauge is permanently stuck on the full mark it most likely is not making electrical contact with the dash panel .
->A clean metal to metal contact between the gauge body and dash panel is needed to provide a current path for coil B to ground at X on the circuit . • If the pointer is jumping upwards towards the full mark there may be some paint or rust causing a intermittent path to ground at X .
• Conversely if you have a dirty or intermittent ground connection at the sender unit your gauge will jump around or be permanently stuck on empty.
You first need to be sure that the gauge is grounded correctly internally. When I repair a gauge, I usually add a ground wire soldered between the gauge and the housing.
Then you need to be sure that your gauge is correctly grounded to the dash panel.
Check also if your sender is correctly grounded.
Yves
Ford GPW 1943 - Louisville - DoD 12-7-43
serial 164794
serial 164794
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