Constant speed prop oil leak

"DP" wrote in message
...
[...] Sure enough, it sprayed a small amount of red hydraulic oil
on the prop and on the top cowl.

Odd. I would've assumed a 210 would have a similar prop governor design to
other piston singles, using engine oil to control the prop.

Granted, I'm not familiar with the 210 systems. But are you sure that the
hydraulic fluid is coming from the prop governor? Alternatively, are you
sure it's hydraulic fluid? Or can you (or anyone else) confirm that the 210
prop governing system uses hydraulic fluid rather than engine oil?

Pete

"Peter Duniho" wrote in message
...
"DP" wrote in message
...
[...] Sure enough, it sprayed a small amount of red hydraulic oil
on the prop and on the top cowl.

Odd. I would've assumed a 210 would have a similar prop governor design
to
other piston singles, using engine oil to control the prop.

They do. The guts of the prop use a red colored oil so you know when they
start to leak. All constant speed props do this.

No, not all.

Newps wrote:

"Peter Duniho" wrote in message
...

"DP" wrote in message
. ..

[...] Sure enough, it sprayed a small amount of red hydraulic oil
on the prop and on the top cowl.

Odd. I would've assumed a 210 would have a similar prop governor design

to

other piston singles, using engine oil to control the prop.


They do. The guts of the prop use a red colored oil so you know when they
start to leak. All constant speed props do this.

"Newps" wrote:


"Peter Duniho" wrote in message
...
"DP" wrote in message
...
[...] Sure enough, it sprayed a small amount of red hydraulic oil
on the prop and on the top cowl.

Odd. I would've assumed a 210 would have a similar prop governor
design
to
other piston singles, using engine oil to control the prop.

They do. The guts of the prop use a red colored oil so you know when
they start to leak. All constant speed props do this.

I checked into this awhile back and learned the same thing. The McCauley
props didn't have it originally, but there's now a mandatory service
bulletin to fill the hub with the red oil/grease. This provides an
indicator of leaks, but also causes the prop to need service more often. I
was told the grease would stay in place for about 5 years, and then the
prop would need to be overhauled, or resealed again.

Mike

On Mon, 19 Apr 2004 01:11:32 GMT, Mike Adams
wrote:

"Newps" wrote:


"Peter Duniho" wrote in message
...
"DP" wrote in message
...
[...] Sure enough, it sprayed a small amount of red hydraulic oil
on the prop and on the top cowl.

Odd. I would've assumed a 210 would have a similar prop governor
design
to
other piston singles, using engine oil to control the prop.

They do. The guts of the prop use a red colored oil so you know when
they start to leak. All constant speed props do this.

I checked into this awhile back and learned the same thing. The McCauley
props didn't have it originally, but there's now a mandatory service
bulletin to fill the hub with the red oil/grease. This provides an
indicator of leaks, but also causes the prop to need service more often. I
was told the grease would stay in place for about 5 years, and then the
prop would need to be overhauled, or resealed again.



Well, this is starting to make sense then.....it's been 10 years since
the last prop overhaul......


Mike

Don Paquette
PP-ASEL
N9723X

Don,

Ten years since the prop was overhauled??? Yikes.

I think you are getting an overhaul reminder. Could be a seal, could
be a crack...I suspect it's time. While the McCauley's don't have the
AD for overhaul every five years, ten years is a little long to go.
Those whirling chunks of metal are under terrific stress.

BTW, do some pricing on the overhaul. If you hit the situation where
you have to replace blades, also do some comparitive shopping as there
may be deals to be had on the new three-blade props for your airplane.

All the best,
Rick

DP wrote in message . ..
On Mon, 19 Apr 2004 01:11:32 GMT, Mike Adams
wrote:

"Newps" wrote:


"Peter Duniho" wrote in message
...
"DP" wrote in message
...
[...] Sure enough, it sprayed a small amount of red hydraulic oil
on the prop and on the top cowl.

Odd. I would've assumed a 210 would have a similar prop governor
design
to
other piston singles, using engine oil to control the prop.

They do. The guts of the prop use a red colored oil so you know when
they start to leak. All constant speed props do this.

I checked into this awhile back and learned the same thing. The McCauley
props didn't have it originally, but there's now a mandatory service
bulletin to fill the hub with the red oil/grease. This provides an
indicator of leaks, but also causes the prop to need service more often. I
was told the grease would stay in place for about 5 years, and then the
prop would need to be overhauled, or resealed again.



Well, this is starting to make sense then.....it's been 10 years since
the last prop overhaul......


Mike

Don Paquette
PP-ASEL
N9723X

Assuming normal wear and tear an overhaul on a 2 blade McCauley for your
typical 182 will run $2K.



"Rick Durden" wrote in message
m...
Don,

Ten years since the prop was overhauled??? Yikes.

I think you are getting an overhaul reminder. Could be a seal, could
be a crack...I suspect it's time. While the McCauley's don't have the
AD for overhaul every five years, ten years is a little long to go.
Those whirling chunks of metal are under terrific stress.

BTW, do some pricing on the overhaul. If you hit the situation where
you have to replace blades, also do some comparitive shopping as there
may be deals to be had on the new three-blade props for your airplane.

On Mon, 19 Apr 2004 13:56:24 -0600, "Newps"
wrote:

Assuming normal wear and tear an overhaul on a 2 blade McCauley for your
typical 182 will run $2K.

This was a new prop back in 1994/5 (don't have my logs right here).
The last owner belied it in so the engine was overhauled and a new
prop put on. I didn't see any overhaul tags anywhere for this prop,
but I KNOW nothings been done to it the last three years I've owned
it.

My A&P said today the prop "appears" fine, and it should only need new
seals, but we won't know until Friday when the prop shop takes it
apart. The A&P tells me between 3-5K for an overhaul, and that the
blades are in great shape. We'll see I guess. I'll post more when I
find out more.

"Rick Durden" wrote in message
om...
Don,

Ten years since the prop was overhauled??? Yikes.

I think you are getting an overhaul reminder. Could be a seal, could
be a crack...I suspect it's time. While the McCauley's don't have the
AD for overhaul every five years, ten years is a little long to go.
Those whirling chunks of metal are under terrific stress.

BTW, do some pricing on the overhaul. If you hit the situation where
you have to replace blades, also do some comparitive shopping as there
may be deals to be had on the new three-blade props for your airplane.


Don Paquette
PP-ASEL
N9723X

On Sun, 18 Apr 2004 17:26:58 -0600, "Newps"
wrote:


"Peter Duniho" wrote in message
...
"DP" wrote in message
...
[...] Sure enough, it sprayed a small amount of red hydraulic oil
on the prop and on the top cowl.

Odd. I would've assumed a 210 would have a similar prop governor design
to
other piston singles, using engine oil to control the prop.

They do. The guts of the prop use a red colored oil so you know when they
start to leak. All constant speed props do this.


AFAIK, all the McCauley's (oil-filled hubs) use the red oil.
Hartzell's have a "dry" hub, and throw grease. A compact hub Hartzell
throwing engine oil (not red) is rare, but it can happen.

Don't know if anybody else mentioned it, but if you see red oil, you
really oughta get it looked at ASAP.

TC