Damage to my Zen noh

[JimPal]

I own a ZEN NOH ZB7001 which has worked great for about 4 years.. Because of a leak of hydraulic oil, I stupidly forgot to check it before using it this morning , and the oil was so low that after running a short distance it would not move.. I filled it with oil and it will not move when in 4wd..When I take it out of 4wd it will move but after moving a short distance the right front wheel feels like it is binding..It then makes a hesitating kind of feeling, but then continues to move freely for a short distance, then does the same thing..Anybody have an idea of what I have done to my great little tractor?
Thanks!

 

[hodge]

When did you last service it, with a new hydraulic filter, and clean the screen? You may have picked up debris with the fluid level so low, and have blockages now. Either way, it sounds like it is due a service.

 

[JimPal]

Thanks for the reply Hodge. No, I have never done what you suggested..Dont know where the hydraulic filter is located..Did not know it had one.. It is my first tractor and I just use it around the place for so many things, But didnt do anything but use it, watch the engine oil and filters..thats about it...Since I posted I tried it again, and it seems to be operating alright as long as I keep it out of 4wd..Also I found the leak and it is coming out from around the PTO..I guess a seal...I hope I got the hydraulic to it in time and it keeps working..I will look and see if I can do what you suggested..Again, Thanks!

 

[300zx]

JimPal, is it a manual drive, ie, 3 speed with high and low(not a hydrostat)? If so, it is probably similar to my B7100. The hydraulic screen on my B7100 is behind the right foot rest in the suction line to the hydraulic pump. There are two lines from the front pump that go above the foot rest on the right side. Follow the bottom one back to where it goes into the gear box of the chassis. If you clean the screen, you will be draining all of the hydraulic oil. This is a picture of my son's B6100 with a pointer to the screen.

If you are having trouble with the 4WD, especially on one front wheel, I wouldn't have expected it to be a problem in the hydraulic gear box. You have 3 oil reservoirs on the front axle. The differential in the middle and the two outer gear boxes for the steering u-joints. I would recommend you check the level in those three. If they have never been serviced, drain them and refill with hydraulic fluid. While you are at it, check the steering box at the bottom of the steering wheel shaft. Fill it also.

As far as your PTO shaft seal, I have never changed one, but I would expect you could pick it out with a scratch awl and then replace it. When replacing a seal, make sure there are no burrs on the PTO shaft that will cut the seal lip. I usually put an old micro-fish film around the shaft, oil it and slide the seal over it.

Good luck and let us know how it goes.

 

[JimPal]

Thanks for the info! Would I use the same hydraulic oil in the three reservoirs in the front axle as I used in the gear box? I am using Traveller Universal
Trans/Hydraulic Fluid. It says "renew for old tractors". I never had a problem with the 4 wd or the front wheels until I let the gear box get low of fluid..It was in 4wd when I let the fluid get low and it quit moving The front wheels were locked, but the rear wheels would move.....Could that affect the front wheels..I took it out of 4 wd and now it seems to be OK..

 

[300zx]

Yes, use the same oil.

I am still assuming this is not a hydro-stat, right?

I am not an expert in the gear drive, but it just doesn't seem logical to me that the 4WD would bind up on a manual drive system with low gear oil in the main gear box. The gears driving the 4WD are low in the gear box and were probably never uncovered. I think it is just a coincidence that the gear/hydraulic oil was low at the same time you are having problems with the front drive binding up and that your problem is probably something in the front drive axle. These are only opinions, maybe other will chime in with better info.

Check those front reservoirs. If they are dry, it is not good. Maybe jack up the front and see if you have any bad noises/binding in the front axles if you turn tires (by hand) and turning the steering while turning the tires. I don't think we have found the real cause of your binding up in 4WD yet.

Let us know what you find out. I am anxious to learn from what you find.

Good luck,

John

 

[JimPal]

Correct, it is not a hydro-stat...After letting it sit awhile after filling the gear box I did not have any trouble when the 4 wheel drive is off..I am tempted to try it again in 4wd and see if it will work now but it bwing locked up before, I dont know if that will be wise...I think the first thing I need to do is replace the seal on the PTO, it has leaked very much of the fluid..Looking in the gear box with a flashlight, it looks almost empty. Sure do appreciate your input..and will report what I find..may take a while because of everything else I have to do....Thanks everyone..

 

[B7100]

What grade of oil is this Traveller Universal stuff?
the front axle and gearbox takes 80/90weight oil in my b7100 which is the same as your B7001.
That pto seal is the least of your worries and if you decide to fix first I would not advise driving around doing more damage until you've looked into the binding in the front end.
Dave

 

[asbug]

What grade of oil is this Traveller Universal stuff?
the front axle and gearbox takes 80/90weight oil in my b7100 which is the same as your B7001.
That pto seal is the least of your worries and if you decide to fix first I would not advise driving around doing more damage until you've looked into the binding in the front end.
Dave

Yeah, the front end of the b7001 uses gear oil, NOT hydrolic fluid.
I also just replaced the rear PTO seal on mine as well, no biggie.
Just get a set of seal pullers, (look like a long flat hook and another has a bent pick on it.) I tapped mine in with a piece of pipe (gotta get over the PTO shaft.)
It has 6 hours of PTO time on it and no leakies, seal for PTO was like $10 US.
The front binding is a problem, get it looked at.
Good luck,
KC

 

[JimPal]

The Traveller Universal Trans/Hydraulic Fluid was purchased at Tractor Supply and has been used in my ZB7001 for as long as I have had it..It is the same kind of Universal Fluid that one of the Kubota mechanics from Orangetractor talks about on a UTube video. I never had a problem with it until I let my gear box drop to near empty due to my negligence..I did not put it in the front axle..Have never put anything as yet in the front axle. There is no leaks there..The reason I am talking about fixing the leak in the PTO first is because it is leaking so badly I cannot keep the gear box full enough to run the tractor..

 

[JimPal]

I forgot to mention that on the label of the Traveller Hydraulic Fluid container it says "Renew For Older Tractors"

 

[JimPal]

Also, the binding in the front end is no longer there as long as I stay out of 4wd..

 

[JimPal]

Thanks Vic, What do you suggest I do? I know nothing about repairing it..or really what is wrong with it or the cause of it, other than letting it get low on oil in the gear box..There is no place I know of where I live that will work on it..There is a Kubota dealer here but they have already told me they will not work on it

 

[Theekillerbee]

I wouldn't be surprised if you could get a local auto mechanic to have a look. Heck, offer one a side job on the weekend and they'd probably take you up on it.

 

[JimPal]

thanks Killerbee, good idea. I may try that after I get the PTO seal fixed..

 

[Orange Tractors]

Small independant garages will work on just about anything. Do some checking around, you want one that has decent mechanics, not one that only works on new fuel injected cars.

Also find out their labor rate and get an estimate of how long the job will take.

Robert

 

[JimPal]

I got the plate holding the PTO seal off & the bearings all look good. the seal has no number that I can find..Somebody told me that if I go to a Kubota dealer & ask for a seal for a Kubota B7100, they would have it & it would fit....Does this sound correct? Is the Kubota B7100 so old a model that they might be suspicious about me having a grey tractor & not sell to me? If so, where would I get a seal? Also, when I get the seal, do I just tap it in or is their something I put on it..Also, the plate does not look like it has a gasket, but some kind of sealent...Sorry for these kinds of questions but that is all I know to do..

 

[JimPal]

Thanks for the suggestion, Orange Tractor! Sounds good.

 

[asbug]

No sealant.
Just clean out the rust on the lip and keep it out of the gear box!
I just used a large pipe that fit the metal ring on the OD of the seal.
Good luck.
Make sure you take the old seal with you, there are apparantly 2 and they tried to give me the wrong one.
Thanks,
KC

 

[JimPal]

Well, I got the PTO cover off, all the gears and bearings were Ok..put the new seal in and the cover back on and so far no leaks.. I was fortunate to find a site where I could download for free the parts manual for my ZB7001..Also found out that a kubota B7100 parts fit my tractor..The manual was for the B7100..I found a Kubota dealer with the correct seal..and now it is fixed..I've got my fingers crossed..As for the tractor, It works good when out of 4WD. Put it in 4WD and the front wheels lock up...I guess when I let the transmission case run low of oil, it did something to the 4WD gears in the transmission case...I am going to look for a mechanic and get a price for looking into it, but for a while I might do what an old time tractor man told me, and just use it without the 4WD...Does anyone think that would cause a problem? Please let me know..Also, since I could see a manual, I found out the tractor has a Differential Lock Pedal. I never knew what that pedal did, so I never used it..Maybe I accidently hit..What would it do?What is it for? Thanks for all the info and suggestions..