Hydrostatic Transmission Control Repair, Part 1 - Cub Cadet 1772
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- Опубліковано 5 вер 2024
- We’re repairing the hydrostatic transmission control system on this Cub Cadet 1772, the beloved baby of our friend Jeff, who caught the Cub Bug when he bought that dead Cub Cadet 2130 we found on the marketplace and coaxed back to life. He’s having problems with the forward and reverse controls, particularly a very slow reverse. We’ll examine the old, worn-out hydrostatic transmission system to demonstrate the internal issues causing the sloppy transmission, discuss the symptoms generated by these problems, and talk about replacing the control plate and bracket in Part 2 next week. We’ll also whip out the calipers for some quick comparison measurements that will show us just how badly worn the plate and bracket are before we install their replacements - along with new buttons, springs, shims, and snap rings - then test the system and adjust for neutral.
LINKS:
Damper Plate (Req:1)
www.partstree....
Cam Assembly (Req:1)
www.partstree....
Shims:
www.mcmaster.c...
www.mcmaster.c...
www.mcmaster.c...
www.mcmaster.c...
www.mcmaster.c...
www.mcmaster.c...
Snap Rings:
www.mcmaster.c...
www.mcmaster.c...
www.mcmaster.c...
Buttons (Req:2)
www.partstree....
Large Spring (Req:1)
www.partstree....
Small Spring (Req:1)
www.partstree....
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It's pretty amazing that the trunion isn't notched out with all the slop in the rest of it. Good detailed stuff, thanks again. Ken
I definitely expected it to be shot as well 🤷
That is an awesome tractor. My 1641 needs minor adjustment in the hydro control. Thanks for putting these videos together - most helpful.
It is an awesome machine. Wish I had one!
I believe your 1641 has a different hydrostatic pump than this. Yours most likely has the HydroGear BDU-21 that they continued to use in the 3000 Series tractors. The control linkage is much less complicated.
I don’t recall ever seeing a detailed video on the hydro linkage repair. Appreciate you sharing this, looking forward to part 2. I might dive into replacing the trunnion too. The control for my 1811 always tends to drift faster. I know how to control it, but once my wife tried to drive it and crashed into the side of her Audi. Needless to say, it’s manageable, as long as I’m driving!
I bet that was a fun moment 😆
Glad I found your channel. I have a 1969 125 with an IH rototiller on the back of it. Runs great but a few problems with linkages.
Thanks for taking the time to comment - and good to hear of another old Cub still in service!
Is there an adjustment for hydraulic steering when turning a sharp corner and forward movement slows to stop or CRAWL? I running an 1854 that does that?
There is no adjustment, but what is happening is related to internal pressure dynamics of the shared hydraulic system. The steering valve and hydrostatic transmission drive motor share the same pressure circuit. When you request full flow/pressure to the steering valve, there will be a pressure drop on the motor. If you make sure that your linkages and trunion controls are rebuilt, and you have changed the fluid and filter, that pressure drop should not cause a huge difference in forward or reverse motion. There will most likely always be some change, but it shouldn't stop movement or decrease it in the way you describe.
Quick question ( and somewhat unrelated)..what motor oil do you use in the Kubota?? SAE 30 is not good here in far upstate NY cuz even in June and August it gets down to 40F at night and might be 90F the next day..I'm thinking 15W-40 year around..
15w-40 year round for most of the small diesel engines. I would not use straight 30 weight in the winter.
To me the lesson here is keep all those linkages lubricated...nobody ever does..
Yup. Some graphite lube goes a long way here.
@@SolunaGarage STP in the oil can..us old guys are not afraid of a little grease..