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nick(at)container.com
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 Posted: Tue Aug 07, 2007 8:44 am Post subject: Gas Gauge intermittent |
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Dear Commander Owners:
I am having continual problems with intermittent readings of the fuel gauge on my 1974 690 A ( serial 11226 ) ….I know there is a $26,000 fix but hoping there is a better way….anyone know of a fix to the problem ?
Nick Martin N690DB
From: owner-commander-list-server(at)matronics.com [mailto:owner-commander-list-server(at)matronics.com] On Behalf Of Moe - Ross Racing Pistons
Sent: Tuesday, August 07, 2007 7:27 AM
To: commander-list(at)matronics.com
Subject: RE: Commander-List: Outflow Valve
Jerry,
Thanks for the tip, I will contact Gary.
Regarding the oil pressure problem. It is generally accepted that the oil pumps on the IGSO 540 series are too small. I can’t remember the GPM (gallons per minute), however, this has been, as I understand it, a long standing problem. Once the pump has in-adequate volume, no amount of spring shimming will raise the oil pressure. Some suggestions: - Have you checked the accuracy of your oil pressure gage? (Laugh, but I have heard some real horror stories)
- Screw an oil pressure gage into the oil galley at the front of the engine and compare the oil pressure on the two gages. Lycoming has a maximum differential that is acceptable, again, I can’t remember what it is, but will look it up for you if necessary.
- Will the oil pressure stay in the green while in flight?
- Will the engine maintain a minimum of 35 PSI at hot idle and about 1,500 RPM (minimum for the fuel pump computer to work)?
Regards,
Moe
N680RR
680F(p)
From: owner-commander-list-server(at)matronics.com [mailto:owner-commander-list-server(at)matronics.com] On Behalf Of Jerry Sprayberry
Sent: Tuesday, August 07, 2007 3:54 AM
To: commander-list(at)matronics.com
Subject: Re: Commander-List: Outflow Valve
Moe,
Mine were replaced at Commander Aero, you might check with Gary.
Another Subject;
Has anyone had any trouble with IGSO 540 Oil Pressure, I bought a New Rebuilt Engine by Performance Engines and it came with (7) Seven Washers under the Pressure Regulator but still cant get but 53 psi after warm-up. any suggestions will be appreciated.
Jerry
[quote]
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bobf(at)feldtman.com
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| Posted: Tue Aug 07, 2007 12:12 pm Post subject: Gas Gauge intermittent |
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A wooden dipstick and a watch?
bobf
On 8/7/07, Nick Martin <nick(at)container.com (nick(at)container.com)> wrote: [quote]
Dear Commander Owners:
I am having continual problems with intermittent readings of the fuel gauge on my 1974 690 A ( serial 11226 ) ….I know there is a $26,000 fix but hoping there is a better way….anyone know of a fix to the problem ?
Nick Martin N690DB
From: owner-commander-list-server(at)matronics.com (owner-commander-list-server(at)matronics.com) [mailto:owner-commander-list-server(at)matronics.com (owner-commander-list-server(at)matronics.com)] On Behalf Of Moe - Ross Racing Pistons
Sent: Tuesday, August 07, 2007 7:27 AM
To: commander-list(at)matronics.com (commander-list(at)matronics.com)
Subject: RE: Outflow Valve
Jerry,
Thanks for the tip, I will contact Gary.
Regarding the oil pressure problem. It is generally accepted that the oil pumps on the IGSO 540 series are too small. I can't remember the GPM (gallons per minute), however, this has been, as I understand it, a long standing problem. Once the pump has in-adequate volume, no amount of spring shimming will raise the oil pressure. Some suggestions: - Have you checked the accuracy of your oil pressure gage? (Laugh, but I have heard some real horror stories)
- Screw an oil pressure gage into the oil galley at the front of the engine and compare the oil pressure on the two gages. Lycoming has a maximum differential that is acceptable, again, I can't remember what it is, but will look it up for you if necessary.
- Will the oil pressure stay in the green while in flight?
- Will the engine maintain a minimum of 35 PSI at hot idle and about 1,500 RPM (minimum for the fuel pump computer to work)?
Regards,
Moe
N680RR
680F(p)
From: owner-commander-list-server(at)matronics.com (owner-commander-list-server(at)matronics.com) [mailto:owner-commander-list-server(at)matronics.com (owner-commander-list-server(at)matronics.com)] On Behalf Of Jerry Sprayberry
Sent: Tuesday, August 07, 2007 3:54 AM
To: commander-list(at)matronics.com (commander-list(at)matronics.com)
Subject: Re: Outflow Valve
Moe,
Mine were replaced at Commander Aero, you might check with Gary.
Another Subject;
Has anyone had any trouble with IGSO 540 Oil Pressure, I bought a New Rebuilt Engine by Performance Engines and it came with (7) Seven Washers under the Pressure Regulator but still cant get but 53 psi after warm-up. any suggestions will be appreciated.
Jerry
[quote]
---
| | - The Matronics Commander-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Commander-List |
|
| Description: |
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| Filesize: |
7.29 KB |
| Viewed: |
1030 Time(s) |
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