browns40
Gold Member
Hi All,
Actually had an opportunity to do some snow removal last week, which reminded me of something that seemed a bit odd to me about the 3320 I have...
When the motor is at operating temperature, and the hydraulic fluid is still cold/thick (just starting to work) , there seems to be distinctly more power...
I find I need to nudge the tach up 300-400 RPMs higher once the transmission/hydro has had a chance to heat up, to maintain the same speed/power it had when cold.
Is this normal with the loss of viscocity heat brings? I used tractor hyd fluid that met the specification listed, but wasn't brand name...
Are there additives anyone is aware of that can raise hydraulic viscosity? I hate the thought of it, but it seems weird...
Any advice from experienced HST folks would sure be appreciated... I'm tempted to dump it & start fresh, although there's only 90 hours on the current fluid.
Oh:
---No there is no water in the system... fluid still looks/feels basically same as when put in
---Yes, there is a bit of "hydraulic whine" I hear, but always have, even when tractor was new with JD fluisd
Look forward to hearing what the "braintrust" has regarding this one... What a great site! /forums/images/graemlins/grin.gif
Happy tractoring!
/forums/images/graemlins/cool.gif
Actually had an opportunity to do some snow removal last week, which reminded me of something that seemed a bit odd to me about the 3320 I have...
When the motor is at operating temperature, and the hydraulic fluid is still cold/thick (just starting to work) , there seems to be distinctly more power...
I find I need to nudge the tach up 300-400 RPMs higher once the transmission/hydro has had a chance to heat up, to maintain the same speed/power it had when cold.
Is this normal with the loss of viscocity heat brings? I used tractor hyd fluid that met the specification listed, but wasn't brand name...
Are there additives anyone is aware of that can raise hydraulic viscosity? I hate the thought of it, but it seems weird...
Any advice from experienced HST folks would sure be appreciated... I'm tempted to dump it & start fresh, although there's only 90 hours on the current fluid.
Oh:
---No there is no water in the system... fluid still looks/feels basically same as when put in
---Yes, there is a bit of "hydraulic whine" I hear, but always have, even when tractor was new with JD fluisd
Look forward to hearing what the "braintrust" has regarding this one... What a great site! /forums/images/graemlins/grin.gif
Happy tractoring!
/forums/images/graemlins/cool.gif