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1. 12:46 PM - Re: Oil temps?? (FLYaDIVE@aol.com)
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In a message dated 7/18/2006 5:07:20 PM Eastern Standard Time,
beech19pilot@yahoo.com writes:
How would you recomend checking the sender.
Mark
"D.Bristol" <dbris200@sbcglobal.net> wrote:
The same warning applies to low temps as well as high temps. The sender may
be bad. So if you cover the oil cooler without first checking the sender, you
may have high oil temps and not know it.
It's not that much trouble to check and I'd recommend that everyone check it
at least once.
Dave B. -6 So Cal
EAA Technical Counselor
==========================================================
How to check the sender is dependent on which temperature sending unit and
gage you have.
If you are using the Stewart Warner type unit then here is the procedure:
1 - Heat 1 quart of OIL up to 250 Deg F - Use a lab thermometer to check temps
2 - At 250 Deg F the RESISTANCE reading of the sending unit should be 28.5
Ohms
Since you are heating up the oil and have things apart insert the Vernatherm
into the oil also.
You should see an INCREASE in height of 3/8"
Also inspect the sealing face of the Vernatherm for "Ballentineing - RINGS -
GROVES" and especially for offset rings on the sealing face. Failure to have
a good seal face is one of the major problems in cooling.
Also, check the crimped end nut on the Vernatherm. There is an AD requiring
inspection at every oil change unless you have the type with the roll-pin
through the crimp nut.
To check the gage reverse the procedure ...
Hook up 13.8 V DC through a variable resistor adjust the variable resistor to
28.5 ohms and you should obtain a full scale deflection of the gage to 250
Deg F (Red Line).
Other gages should come with instructions or call the manufacture.
Barry
"Chop'd Liver"
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