Need help finding oil temp gauge for the D-200

[bo dawg 536]

Anyone know or have a replacement oil temp gauge for the D-200? PN is 103716 according to the parts manual I have.

[gwest_ca-(File Mod) 11,664]

Got any temperature gauge you can try? Back then I think most electric gauges were a standard design. Even the sending units could be mixed and matched. As long as the thread matched it worked.

We were adding temp gauges with a T to the cooler line as it left the auto transmission. There was a Ford sending unit with 1/8" NPT that worked great and took up less room than the sender supplied with the gauges.

[squonk 44,386]

Stewart Warner and VDO gauges work butt-backward. You can't mix the sending units. If I was a gamblin man, I would guess a SW gauge would work with the sending unit.

[pfrederi 18,866]

When I replaced the temp gauge in my D200 I found that the mechanical gauges sending unit would not fit in the pump head.  Had to use electrical.  I used a Sunpro at that time.

 

 

 

[bo dawg 536]

1 hour ago, squonk said:

Stewart Warner and VDO gauges work butt-backward. You can't mix the sending units. If I was a gamblin man, I would guess a SW gauge would work with the sending unit.

 

How is it backwards? I seen an SW on ebay.

 

[pfrederi 18,866]

Is it just your gauge or is it the sending unit that is bad???   Or the wiring??

 

The electric gauges work by varying the resistance based on heat.  Some may see high resistance as being hot some companies gauges may see low resistance as hot..

[bo dawg 536]

2 hours ago, squonk said:

Stewart Warner and VDO gauges work butt-backward. You can't mix the sending units. If I was a gamblin man, I would guess a SW gauge would work with the sending unit.

 

I found 2 different SW gauges, would either one work? I assume the one with 3 prongs has 1 for ground.

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[bo dawg 536]

36 minutes ago, pfrederi said:

Is it just your gauge or is it the sending unit that is bad???   Or the wiring??

 

The electric gauges work by varying the resistance based on heat.  Some may see high resistance as being hot some companies gauges may see low resistance as hot..

 

I assume the gauge is bad and the needle is broke off too.

[squonk 44,386]

52 minutes ago, bo dawg said:

 

How is it backwards? I seen an SW on ebay.

 

A sending unit sends resistance back to the gauge depending on the temp. A SW gauge would read hot at a certain resistance but if you install a VDO gauge that same sending unit the  resistance reading would make it read cool

[squonk 44,386]

18 minutes ago, bo dawg said:

 

I found 2 different SW gauges, would either one work? I assume the one with 3 prongs has 1 for ground.

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Gauges usually ground through the sending unit. The 3rd prong may be for a light. 

[bo dawg 536]

5 minutes ago, squonk said:

A sending unit sends resistance back to the gauge depending on the temp. A SW gauge would read hot at a certain resistance but if you install a VDO gauge that same sending unit the  resistance reading would make it read cool

 

So which one do I want? SW correct

Edited Friday at 03:50 PM by bo dawg

[squonk 44,386]

I think they used SW gauges from the factory. A lot of equipment manufacturers did. How many prongs does your old one have? I would get the gauge that most closely matches yours. You can probably just buy a new gauge kit complete with the sending unit. you might need to buy a brass adapter to get the correct threads. 

[gwest_ca-(File Mod) 11,664]

The 3-terminal gauge has the I and S insulated but see no insulation under the 3rd so likely a ground. Would work on a panel not grounded.

A 2-terminal gauge would likely work if mounted to a grounded panel.

[bo dawg 536]

19 minutes ago, squonk said:

I think they used SW gauges from the factory. A lot of equipment manufacturers did. How many prongs does your old one have? I would get the gauge that most closely matches yours. You can probably just buy a new gauge kit complete with the sending unit. you might need to buy a brass adapter to get the correct threads. 

 

[bo dawg 536]

19 minutes ago, gwest_ca said:

The 3-terminal gauge has the I and S insulated but see no insulation under the 3rd so likely a ground. Would work on a panel not grounded.

A 2-terminal gauge would likely work if mounted to a grounded panel.

Thanks G!

[bo dawg 536]

8 hours ago, squonk said:

I think they used SW gauges from the factory. A lot of equipment manufacturers did. How many prongs does your old one have? I would get the gauge that most closely matches yours. You can probably just buy a new gauge kit complete with the sending unit. you might need to buy a brass adapter to get the correct threads. 

 

Would you know anything about Hastings gauge? Its cheaper and comes with sender too

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[squonk 44,386]

Never heard of them..

[953 nut 61,625]

20 hours ago, squonk said:

You can probably just buy a new gauge kit complete with the sending unit.

Rather than hoping the new gauge is compatible with a sending unit that is likely to be over forty years old you will be better off having both be new.

[pfrederi 18,866]

They are 10 - $40 on Amazon.  This Bosch one comes with multiple adapters.  Some cheap ones don't.  Like Richard said why waste time on trying maybe to match your maybe working sending unit.

 

[bo dawg 536]

Thank you guys for the help. Makes sense to replace sender too.