Ok, boats... I'm retrofitting my 1976 Chrysler 75hp outboard with a
used tilt/trim unit. Hooked it all up, figured out the hydraulic
lines, followed the procedure... Filled it with 30 w non-detergent
motor oil. I run the unit up and down several times, all seems to be
working OK once the cylinders filled with oil and purged the air.

Opened the reservoir to check the level, a bunch of foam spilled out.
Drained the oil. Refilled. Ran it. Same result.

Am I doing something wrong? Is a certain amount of foaming normal?

Any suggestions? Experiences?

Thanks

Terry

On Wed, 5 Nov 2008 17:59:52 -0800 (PST), wrote:

Ok, boats... I'm retrofitting my 1976 Chrysler 75hp outboard with a
used tilt/trim unit. Hooked it all up, figured out the hydraulic
lines, followed the procedure... Filled it with 30 w non-detergent
motor oil. I run the unit up and down several times, all seems to be
working OK once the cylinders filled with oil and purged the air.

Opened the reservoir to check the level, a bunch of foam spilled out.
Drained the oil. Refilled. Ran it. Same result.

Am I doing something wrong? Is a certain amount of foaming normal?

Any suggestions? Experiences?

Thanks

30 weight motor oil? Um...no?

Get a couple of quarts of hydraulic oil.

Motor oil?

30 weight motor oil? *Um...no?

Get a couple of quarts of hydraulic oil.

Motor oil?

The service manual specified 30 w non-detergent motor oil. The
reservoir only holds about 6 ozs...

Yeah, I know there is tilt/trim fluid and various hydraulic fluids...
all of which are oils... asked my hydraulic guy at work, he said motor
oil is fine. Haven't asked him about the foaming issue yet. I read
last night that some of the tilt/trim fluids have an anti-foaming
agent added. I'm not opposed to trying one of those.

Terry.

wrote:

Am I doing something wrong? Is a certain amount of foaming normal?

You will often get foaming when bleeding the air from a hydraulic system
(you're mixing air and oil under pressure after all). Simply let it
settle out for a day or two and recheck and re-top it off until you're
running clean.



--
Regards,
Dave Brown
Brown's Marina Ltd
http://brownsmarina.com/

On Nov 6, 5:57*am, Short Wave Sportfishing
wrote:
On Wed, 5 Nov 2008 17:59:52 -0800 (PST), wrote:
Ok, boats... I'm retrofitting my 1976 Chrysler 75hp outboard with a
used tilt/trim unit. Hooked it all up, figured out the hydraulic
lines, followed the procedure... Filled it with 30 w non-detergent
motor oil. I run the unit up and down several times, all seems to be
working OK once the cylinders filled with oil and purged the air.

Opened the reservoir to check the level, a bunch of foam spilled out.
Drained the oil. Refilled. Ran it. Same result.

Am I doing something wrong? Is a certain amount of foaming normal?

Any suggestions? Experiences?

Thanks

30 weight motor oil? *Um...no?

Get a couple of quarts of hydraulic oil.

Motor oil?

A lot of older tilt/trim units did in fact use 30W.

Most any light to medium weight oil can be used in hydralic systems. The
non-detergent is because of the proximity to water, detergent oils attract
water. Foaming means air is still mixed in it. Let it settle overnight and
top it off. It might take a little while to get all the air out of the
system but once it is out the foaming will stop.

"Terry S" wrote in message
...


30 weight motor oil? Um...no?

Get a couple of quarts of hydraulic oil.

Motor oil?

The service manual specified 30 w non-detergent motor oil. The
reservoir only holds about 6 ozs...

Yeah, I know there is tilt/trim fluid and various hydraulic fluids...
all of which are oils... asked my hydraulic guy at work, he said motor
oil is fine. Haven't asked him about the foaming issue yet. I read
last night that some of the tilt/trim fluids have an anti-foaming
agent added. I'm not opposed to trying one of those.

Terry.

On Thu, 06 Nov 2008 10:57:47 GMT, Short Wave Sportfishing
wrote:

30 weight motor oil? Um...no?

Get a couple of quarts of hydraulic oil.

Motor oil?

The hydraulic unit for my stabilizer system specifies 30wt oil.

wrote in message
...
On Nov 6, 5:57 am, Short Wave Sportfishing
wrote:
On Wed, 5 Nov 2008 17:59:52 -0800 (PST), wrote:
Ok, boats... I'm retrofitting my 1976 Chrysler 75hp outboard with a
used tilt/trim unit. Hooked it all up, figured out the hydraulic
lines, followed the procedure... Filled it with 30 w non-detergent
motor oil. I run the unit up and down several times, all seems to be
working OK once the cylinders filled with oil and purged the air.

Opened the reservoir to check the level, a bunch of foam spilled out.
Drained the oil. Refilled. Ran it. Same result.

Am I doing something wrong? Is a certain amount of foaming normal?

Any suggestions? Experiences?

Thanks

30 weight motor oil? Um...no?

Get a couple of quarts of hydraulic oil.

Motor oil?

A lot of older tilt/trim units did in fact use 30W.


Yup. And try to find the non-detergent variety. It's often used in
pressure washers as well.
I remember going to AutoZone looking for 30W ND and the guy at the counter
had never heard of it.

Eisboch

On Thu, 06 Nov 2008 02:02:42 -0500, wrote:

Why motor oil? Usually they use ATF or real tilt/trim fluid. Motor oil
is a lubricant, you need hydraulic oil. Usually different stuff

My Mercedes Unimog industrial tractor uses SAE 30 engine oil in the
tractor hydraulics. The backhoe has a separate pump and reservoir and
uses Case hydraulic oil.

Casady

I've gotten it from walmart before but not consistently. Lowes has it in
the power washer section.

"Eisboch" wrote in message
...

wrote in message
...
On Nov 6, 5:57 am, Short Wave Sportfishing
wrote:
On Wed, 5 Nov 2008 17:59:52 -0800 (PST), wrote:
Ok, boats... I'm retrofitting my 1976 Chrysler 75hp outboard with a
used tilt/trim unit. Hooked it all up, figured out the hydraulic
lines, followed the procedure... Filled it with 30 w non-detergent
motor oil. I run the unit up and down several times, all seems to be
working OK once the cylinders filled with oil and purged the air.

Opened the reservoir to check the level, a bunch of foam spilled out.
Drained the oil. Refilled. Ran it. Same result.

Am I doing something wrong? Is a certain amount of foaming normal?

Any suggestions? Experiences?

Thanks

30 weight motor oil? Um...no?

Get a couple of quarts of hydraulic oil.

Motor oil?

A lot of older tilt/trim units did in fact use 30W.


Yup. And try to find the non-detergent variety. It's often used in
pressure washers as well.
I remember going to AutoZone looking for 30W ND and the guy at the counter
had never heard of it.

Eisboch