Cub 127 Hydro Issues. Just joined!

Bapple33 · #1 04-03-2016, 07:09 PM

Hi all! I just joined here today. I picked up a Cub 127 Hydro I think a 67-70 model. Got it running and had to free up the plungers in the check valves last week. All was going fine after some WD -40 and cleaning them off. That was last Sunday. It's been in the garage all week. It started today easily and after I let the engine warm up I tried to back out of the garage, no movement, nothing forward either. This thing sat for a few years in a barn before I got it. I figured I'd change the hydro fluid and filter since I was having issues. I noticed the old hydro fluid had tons of tiny air bubbles in it when I drained it. I put in new fluid and filter and same result. When it is running both check valves are up but there no pressure behind them. Not sure if there should be. Some one told me to purge the line for air or it may be the valves. Any thoughts, opinions, advice would be greatly appreciated. Thanks in advance!

R Bedell · #2 04-03-2016, 07:56 PM

First, welcome to OCC..........

Check the Hydro Unit "input shaft" to see if it is rotating at the same speed (RPM's) as the drive shaft. If not, there is a broken Spirol Pin to the coupler on that input shaft.

Bapple33 · #3 04-03-2016, 08:08 PM

Thanks for the welcome and the reply. So here's the latest. After I posted this I decided to take a break and eat. When I went out an hour ago to push the mower in I decided one last try. It fired right up and moved forward and backward with ease at idle. I made a small pass through the yard, sitting on the rear axle, and backed it in the garage. Ran just fine like last week. What's the deal? I also noticed that when I drained the fluid and had the back cover off the case was lined with what seemed like a thin coat of clearing jelly? Is that from old hydro fluid? Thanks!

Alvy · #4 04-03-2016, 09:20 PM

Sounds like you might want to change fluid and filter again and make sure you clean out the rear really well and get all that stuff out. You may have had air in it each time and it bled out on it's own. Probably good to do one more change.

Bapple33 · #5 04-03-2016, 09:30 PM

Thanks! I'll give that a try as well. Should I worry about wiping all that jelly like junk out? Or as much as I can?

ol'George · #6 04-03-2016, 09:40 PM

Quote:

Originally Posted by Bapple33

Thanks! I'll give that a try as well. Should I worry about wiping all that jelly like junk out? Or as much as I can?

Yes it will cause problems, it is an emulsion of water/oil,wipe it out and flush it out with kerosine or your favorite cleaner using an old paint brush helps.