| Oil Pressure Sending Unit [message #264624] |
Tue, 21 October 2014 17:35  |
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Mike B
Messages: 35
Registered: November 2011
Location: Port Ludlow, WA / Mount D...
Karma: 0
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I have a 1975 Palm Beach GMC Motorhome (455 Olds Toronado) and need a replacement oil pressure sending unit. The electrical connection tab broke off on mine and I obtained what was supposed to be a correct replacement from a local supply house. However, the replacement consistently now shows my oil pressure at 10 psi, regardless of load or rpm.
My coach has a "Mac" retrofitted dash and gauges - I don't know if that makes a difference or not. My previous (accurate) sending unit is die stamped with "80" and "1349". I have tried to upload a photo of my previous (accurate) sending unit, or look at:
http://www.gmcmhphotos.com/photos/general-jimmy/p56336-oil-pressure-sending-unit.html
Thanks!
http://www.gmcmhphotos.com/photos/showfull.php?photo=56336[/img]
Mike Brasfield
1975 Palm Beach
Port Ludlow, WA and/or Mount Dora, FL
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| Re: [GMCnet] Oil Pressure Sending Unit [message #264625 is a reply to message #264624] |
Tue, 21 October 2014 17:52  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Mike,
Your best bet is to go to bdub.net, check the vendors list for "Custom
Instrument Panels", and contact "Mac" McNeil. That way you'll be sure to
get the right part the first time. :-)
JWID
Ken H.
Oct 21, 2014 at 6:35 PM, Mike Brasfield wrote:
> I have a 1975 Palm Beach GMC Motorhome (455 Olds Toronado) and need a
> replacement oil pressure sending unit. The electrical connection tab broke
> off
> on mine and I obtained what was supposed to be a correct replacement from
> a local supply house. However, the replacement consistently now shows my
> oil pressure at 10 psi, regardless of load or rpm.
>
> My coach has a "Mac" retrofitted dash and gauges - I don't know if that
> makes a difference or not. My previous (accurate) sending unit is die
> stamped
> with "80" and "1349". I have tried to upload a photo of my previous
> (accurate) sending unit, or look at:
>
>
> http://www.gmcmhphotos.com/photos/general-jimmy/p56336-oil-pressure-sending-unit.html
>
> Thanks!
>
> http://www.gmcmhphotos.com/photos/showfull.php?photo=56336[img
> --
> Mike Brasfield
> 1975 Palm Beach
> Port Ludlow, WA
> Mount Dora, FL
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: Oil Pressure Sending Unit [message #264628 is a reply to message #264626] |
Tue, 21 October 2014 18:22 |
Manong
Messages: 88
Registered: July 2007
Location: Madison, WI
Karma: 0
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I have one that came off of my 74 GMC 455. It doesn't have any numbers on it except U.S. Pat 4.079.351. If you want it you may have it for the postage. It is in Madison, WI.
Tom
Manong
Madison, WI
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| Re: Oil Pressure Sending Unit [message #264636 is a reply to message #264624] |
Tue, 21 October 2014 21:11 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Make sure the one they sold you is for an Oil Pressure Gage and not an oil pressure switch for an oil light.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Oil Pressure Sending Unit [message #264637 is a reply to message #264624] |
Tue, 21 October 2014 21:37 |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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Senior Member |
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I have the Mac dash and it uses the same oil pressure sender. The one that I use is a NAPA number OP6636SB, and that is the 0 to 80 PSIG sender. NAPA calls it a switch but it is a pressure sender. Your Mac dash should have a 0-80 gauge. My guess is that the guy sold you a pressure switch and that is not what you want.
JR Wright
78 Buskirk Stretch
75 Avion
Michigan
> On Oct 21, 2014, at 6:35 PM, Mike Brasfield wrote:
>
> I have a 1975 Palm Beach GMC Motorhome (455 Olds Toronado) and need a replacement oil pressure sending unit. The electrical connection tab broke off
> on mine and I obtained what was supposed to be a correct replacement from a local supply house. However, the replacement consistently now shows my
> oil pressure at 10 psi, regardless of load or rpm.
>
> My coach has a "Mac" retrofitted dash and gauges - I don't know if that makes a difference or not. My previous (accurate) sending unit is die stamped
> with "80" and "1349". I have tried to upload a photo of my previous (accurate) sending unit, or look at:
>
> http://www.gmcmhphotos.com/photos/general-jimmy/p56336-oil-pressure-sending-unit.html
>
> Thanks!
>
> http://www.gmcmhphotos.com/photos/showfull.php?photo=56336[img
> --
> Mike Brasfield
> 1975 Palm Beach
> Port Ludlow, WA
> Mount Dora, FL
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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| Re: [GMCnet] Oil Pressure Sending Unit [message #264669 is a reply to message #264625] |
Wed, 22 October 2014 13:21 |
Jim at the Co-op
Messages: 291
Registered: May 2014
Location: Orlando Florida
Karma: 2
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Senior Member |
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Mac keeps records on every dash he produces, give him a call.. chances are he will have the right one for you
Sent from my T-Mobile 4G LTE Device
-------- Original message --------
From: John Wright
Date: 10/21/2014 10:37 PM (GMT-05:00)
To: GMC Net
Subject: Re: [GMCnet] Oil Pressure Sending Unit
I have the Mac dash and it uses the same oil pressure sender. The one that I use is a NAPA number OP6636SB, and that is the 0 to 80 PSIG sender. NAPA calls it a switch but it is a pressure sender. Your Mac dash should have a 0-80 gauge. My guess is that the guy sold you a pressure switch and that is not what you want.
JR Wright
78 Buskirk Stretch
75 Avion
Michigan
> On Oct 21, 2014, at 6:35 PM, Mike Brasfield wrote:
>
> I have a 1975 Palm Beach GMC Motorhome (455 Olds Toronado) and need a replacement oil pressure sending unit. The electrical connection tab broke off
> on mine and I obtained what was supposed to be a correct replacement from a local supply house. However, the replacement consistently now shows my
> oil pressure at 10 psi, regardless of load or rpm.
>
> My coach has a "Mac" retrofitted dash and gauges - I don't know if that makes a difference or not. My previous (accurate) sending unit is die stamped
> with "80" and "1349". I have tried to upload a photo of my previous (accurate) sending unit, or look at:
>
> http://www.gmcmhphotos.com/photos/general-jimmy/p56336-oil-pressure-sending-unit.html
>
> Thanks!
>
> http://www.gmcmhphotos.com/photos/showfull.php?photo=56336[img
> --
> Mike Brasfield
> 1975 Palm Beach
> Port Ludlow, WA
> Mount Dora, FL
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
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