Today's Message Index:
----------------------
1. 06:50 PM - Low Oil Pressure....Re: High Oil Pressure (Roger Lee)
2. 06:55 PM - Re: High Oil Pressure (Roger Lee)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Low Oil Pressure....Re: High Oil Pressure |
Hi Tommy,
Couple of things here. The VDO gages come in two models. One has an anti vibration
cadmium ring around it and it cost $200+. The other exact VDO gage is the
same gage it just doesn't have the anti vibration ring and it sells for about
$40. Since Rotax has had some issues over the years with the vibration on the
oil pressure sender I would remote mount it and use the $40 model. This is an
approved modification from Rotax. If you have a Dynon system and a fuel pressure
sensor for that I would highly recommend that gets remote mounted.
Now for the problem of the low oil pressure. To check to see if the sender is correct
you can buy at the hardware store a few simple items and make a mechanical
gage and see if the sender and the gage in the cockpit are correct. Checking
the sender and cockpit gage with a mechanical one is the number one item to
try and see where you need to look first. Use 1/8" copper tubing, a mechanical
gage that goes up to 100psi. The oil pressure sender is a 1/8" NPT fitting.
Bring the tubing out about 12" then add a tee fitting. This way you can put the
sender back in line and check it against the mechanical one. Put the mechanical
gage at the end of the 5' of copper tubing. 5' of tubing lets you bring the
gage into the cockpit to compare.
A few months ago I had the same problem with an Flight Design CT and found a partial
ground. The meter said it was grounded, but I found it was only a partial
ground and when I added a test wire right to the ground it started to read in
the cockpit as it should.
Does the pressure change with the the rpm. Does it go up and down? Partial ground
problem. It may change some (normal), but if it is a partial ground it gets
lower in pressure as you give it more throttle. Your 912ULS oil pressure should
be between 40-55psi during normal cruise rpm's. It will be a little higher
on start up, but then come down as it gets warmer. Some of the older 912ULS's
ran higher oil pressure than the new 912's run. Rotax lowered the pressure. They
said they were more concerned with volume over pressure.
Hope this helps.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Service Center
520-574-1080
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=190481#190481
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: High Oil Pressure |
Hi Guys,
I would not think the oil pressure is really at 99psi. You need to check this against
a mechanical gage which I think will show you your pressure is normal.
My first thought is the oil pressure sensor wire is too close to an energy producing
wire. Move your oil pressure sender wire away from all energy producing
wires.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Service Center
520-574-1080
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=190483#190483
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|