149 No Longer "Parks" After Hydro Fluid Change

[HudsonvilleHornet]

Odd issue I encountered on my new to me/first 149 Cub. Decided to change the hydro fluid as I have no clue what it's history was. Fluid level was a little low, but upon finally getting the rear cover off, everything looked great inside. I picked up a Wix hydraulic filter and some IH-compatible fluid from Farm and Fleet. I know Hytran is preferred, but it seems a lot of people do OK with generic and since I assumed the fluid was going to be pretty funky I wanted to use less expensive stuff as a "flush" before spending $100 on the good stuff.

Everything was fine on the test drive...until I went to park it. It's 'home' has a bit of an incline, and ever since the fluid change, it no longer stays in place when the engine is off and I now have to use a chock to keep it in place due to this very slow creep. There was no other change here, other than the fluid and filter. Is this simply a cheap fluid problem, or is there something else going on here?

Thanks!!

[ironman]

Without knowing the severity of the incline....
A. Are you setting the brake pedal in the lock-down position when you park it?
B. Do you have manual or automatic hydro-release valves?

[HudsonvilleHornet]

The incline isn't severe, but it's not super shallow. Probably a 6-8" rise over a 3-4 feet.

A) brake pedal is set, but it could be adjusted. That said, it does stop the tractor..or I think at least, the discs look like at least something is working on both sides.

B) If it's what you're referring to, there are a couple relief valves with the buttons on them. I've not actuated them and they don't look to have been moved in quite a while.

[finsruskw]

Did it have this issue before the filter/fluid change??
The brakes are mechanical and if not properly adjusted.......well......
I think you have answered your own question.

Pop the tunnel cover off and see if the pin in the control rod ass'y (part #14) bottoms out in the cam pivot bracket (part #7) when the brakes are locked,

If it does, and the tractor can still be rolled, you have a brake adjustment issue.
If it does not, you have a hydro adjustment issue and could still have a brake adjustment issue as well

Download the FSM for your Cub from the manuals section,
It has a detailed procedure for proper brake adjustment.

Good Luck!!

[HudsonvilleHornet]

No, it would stay put for days on end without the brake on before the fluid change. Maybe it was moving so slow I didn't notice it, but now you can see it moving. Without a doubt I need to make some adjustments, but I guess I wasn't sure if it was normal for it to creep like that with the engine off or not.

[finsruskw]

So, you park it, on an incline, w/o the brake being set and wonder why it rolls??

If it has automatic valves, yes it will roll if the incline is steep enough

Just adjust the brakes, set the brakes when parked and don't worry about it.

Why would you not set the brakes when parked!!

[Cubcadet_107]

Originally Posted by HudsonvilleHornet

there are a couple relief valves with the buttons on them.

If they have buttons on them, they are manual release valves, not automatic. They shouldn't relieve hydro pressure unless the buttons are pressed down. You mention that they look stuck, perhaps they are pressed down slightly allowing for pressure to escape quicker than normal?

The best way to free them up is with some penetrating oil, then take some pliers and slowly rotate them around. The penetrating oil should slowly seep down in there and free up the buttons.

[HudsonvilleHornet]

They're caked in dirt right now, I want to get it cleaned up a bit before pushing them to avoid potentially working grit in the bores. Been a little cold out for a car wash until just recently.

[dale c.]

clean it up , use a small wire brush on the pins that stick up use air pressure to blow dirt away then spray with penetrant leave sit a while , before pushing them down , once you're sure they're free a little grease on the pins will help with rust