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Buying Advise for 7711

r77

Member
Level 2
Joined
Apr 19, 2016
Messages
33
First name
r77
Hi everyone
I am looking to buy a Zetor and have found a 7711, don't know the age but they were made between 86-92 as far as am aware.
Dealer says 2086 hours, but am sceptical as this tractor has well worn goodyear 16.9 x 30 radials on back.
I would prefer the smallest 4 cylinder Zetor as I have light work to do and on softish ground, but can not find a reasonable one, seems people like them because of their efficiency, I had a Zetor Crystal that was fantastic over the same ground so the weight alone is not my main consideration.
My questions are,
1./Does the 7711 have separate heads for each cylinder.
2./Does the 7711 have frost plugs inside the head that if they leak causing water to enter the oil.
3./Does the dual clutch drive the hydraulic pump and as such would cause the pump to turn rather slowly if the clutch plates were to slip under hydraulic load, such as tipping a trailer.
4./Can the hydraulic pump be disengaged like on the Zetor Crystal.
5./Does the 7711 have disc brakes like a Crystal or shoe type brakes, and can one tell this from just looking, for example is the brake cylinder outside the housing like on the Crystal for disc brakes and perhaps inside the brake housing for the shoe type.
6./Is the pto mechanically driven or is there a pump that drives it.

And in general are these tractors easy to start, my experience has been that in most all cases an easy to start engine usually goes on to be a good performer, less something goes pair shaped when it heats up of course.
Is there an over load for starting, or are heaters installed as default.
This tractor has 16.9 x 30 back tires, is this the norm or has someone changed from the originals, I ask because looking at the picture on the dealers site it does not have much room to put
for instance a new set of 16.9's on, this is a concern as 14.9 are becoming scarce, the tyre people tell me they are charging the same price and in some cases more depending on brand as they are not a good seller any more, and on top of that I don't want to buy wheels for the narrower tyre.

Any help would be much appreciated.

Thank you kindly.

 
7711 has the disk brakes of the 8011 with outward cylinders. Individual heads, no frost plug's between head and block (6911 onwards)
They start well as long as the feed pump doesnt pick up air. Some mount an Electric feed pump.

Pto clutch is mechanically operated
 
Thanks Renze

Thanks for replying

I have included a links at the bottom to the images, they are quite big and reveal a lot of detail. Maybe someone with a critical eye will see something that may be helpful to know.

Good to know the brakes are same as crystal, I had a crystal and the only regret I have is selling it, it was an amazing (4cyl 2Wd), I towed a ten ton digger not counting buckets and the loader weighed another four ton, 2 foot deep chassis from a 40 foot low loader. I drove in a bog, spread fertiliser on the bog for planting trees, had a shear grab on the back for silage, never ever had a problem with it other than someone managed to crack the weld that holds the clutch pedal to the clutch shaft, they were pulling a concrete lorry that got stuck in muck, still should not have cracked the weld though, needless to say I did not see or partake in the fiasco.

Please feel free to comment on what to look for on these tractors regarding problems excessive wear etc, the pictures on the link shows quite a lot of details.

To Images, copy and past in browser if they don't work.
http://www.alexander-mills.co.uk/stock/tractors/11006571a.jpg
http://www.alexander-mills.co.uk/stock/tractors/11006571b.jpg
http://www.alexander-mills.co.uk/stock/tractors/11006571c.jpg
http://www.alexander-mills.co.uk/stock/tractors/11006571d.jpg
http://www.alexander-mills.co.uk/stock/tractors/11006571e.jpg
http://www.alexander-mills.co.uk/stock/tractors/11006571g.jpg
http://www.alexander-mills.co.uk/stock/tractors/11006571h.jpg

Kind regards & thanks to all.
 
Thanks Renze

Thanks for replying

I have included a links at the bottom to the images, they are quite big and reveal a lot of detail. Maybe someone with a critical eye will see something that may be helpful to know.

Good to know the brakes are same as crystal, I had a crystal and the only regret I have is selling it, it was an amazing (4cyl 2Wd), I towed a ten ton digger not counting buckets and the loader weighed another four ton, 2 foot deep chassis from a 40 foot low loader. I drove in a bog, spread fertiliser on the bog for planting trees, had a shear grab on the back for silage, never ever had a problem with it other than someone managed to crack the weld that holds the clutch pedal to the clutch shaft, they were pulling a concrete lorry that got stuck in muck, still should not have cracked the weld though, needless to say I did not see or partake in the fiasco.

Please feel free to comment on what to look for on these tractors regarding problems excessive wear etc, the pictures on the link shows quite a lot of details.

To Images, copy and past in browser if they don't work.
http://www.alexander-mills.co.uk/stock/tractors/11006571a.jpg
http://www.alexander-mills.co.uk/stock/tractors/11006571b.jpg
http://www.alexander-mills.co.uk/stock/tractors/11006571c.jpg
http://www.alexander-mills.co.uk/stock/tractors/11006571d.jpg
http://www.alexander-mills.co.uk/stock/tractors/11006571e.jpg
http://www.alexander-mills.co.uk/stock/tractors/11006571g.jpg
http://www.alexander-mills.co.uk/stock/tractors/11006571h.jpg

Kind regards & thanks to all.

as for your concern for tires. 16/9,30 is original and its also possible to put 34 inch tires on them. on this tractor i believe the previous owner has loosened the portals and twisted them to make it lower, maybe to get in a low barn etc. this is easy to undo again. the engines in these the 7701 is a wery good powerful engine with longstroke to make it wery torque full. my only concern is that it seems a bit rough an misused by former owners.
 
Hi frontera1141

Thanks for the comments, yes it looks rough, rotted from dung and probably the weather, it always seems to be raining here, the cabs on that model are not as good as the crystals were, I had one like new when I sold it.

I thought about turning the axles round to lift this tractor, as I never saw one sitting low at the back with that size of back tyre and front wheel, my father did this with a david brown 990 which had dowels to hold it in the correct position, he said they went back in again, that he swapped sides over to make this happen, but I never seen him do this, just the finished job.

Tractors in the 5,000 range are very scarce over here, they exported and broke them all for scrap, day after day I watched the lorries take away all the good old stuff, listers, petters, david browns, fords, and lots more, now there is nothing left other than expensive stuff, with too much electronics, I hate electronics even though I work on generator heads, and arduino boards and coding. I've seen men ready for the grave with dyna shift, and others, no need for any of it, just engineer it well and learn to be a man instead of a computerised tractor driver.

Rough yes, but oddly the paint seems original, not scalded off the engine, or any where else, I've seen very clean ones further up in years with the paint all burned chipped from work etc, looks do not bother me, it will end up looking new when I get around to it anyway.

All I want to do is cut some rushes, plough a few acres once in a blue moon, disc or rotovate it, and spread fertiliser, a weeks work every six months, other than a small vegetable patch.

Either way, I will see it tomorrow, if it suits it will be coming home if not it can continue on to the scrap yard, I have a few other brands to look at in any event.

Just curious in relation to turning the axles down, won't this effect the brakes, for example they will no longer pull in a straight line through the casing as it is not directly lined up with the rod, if so then this tractor should have been altered to correct this issue if it was turned by someone who knew what they were doing, other than this it will be hard for me to know whether or not it was turned as I have not seen another to compare with.

Regards to all.
 
i think i can see its been turned in the pictures because of a flange in a different place than normal. the brakes i think is no issue in this case as theinside dont move quite so much as the outside when turning, zetor delivered tractors turned down from factory to have a low center of gravity called zetor HORAL wich where made for steep hillsides and had an in built inclinometer.

 
Thanks fronterra11441, good to know one can rotate these without too much difficulty.

I looked at the tractor today, everything works, but everything also needs to be replaced, brakes must have never been adjusted as the adjusters are so corroded they are almost unrecognisable, cab too rotten to fix up, the time involved in making this proper again is not worth it, if the tractor was 2000 euro it might be worth investing time and parts on, but the price the dealer has on it does not reflect its value, he just put the export value on this tractor and chanced his hand, he will have it a long long time before anyone even makes an offer on it.
Its really worth parts value, and if someone wanted to restore it, mechanically it would make a good base.

I shall keep looking.
 

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