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Hi did Yuchai ever go into hystat as there was some rumor the were experimenting with this a few years ago? if so was it dual path or single.
It crossed my mind that a single path hystat (as found on the Terramite machines) coupled with either the planetary brake release steering as used on the IH t340 / t500 tractors, or the Clarke transaxle diff steering as used on the Case 310 & Oliver OC3, might make a good tractor. If highdrive was acceptable then there would be no need of final drive bullgears. A single lever could give forward & reverse speeds of 0 to 4 mph, the georotor motor could be mounted sideways on the transaxle (no bevel gear needed as the hoses turn the 90 deg)
If the little Yuchai loader is still available, with the demise of Italian maker Macmoter, this is now the only trackloader under 13 tons made in the world (not counting the rubber track skid steers)
Just an idea I have had for sometime, pete
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Curious where you heard the rumor. To my knowledge Yuchai has no plans to make their “loaders” hydrostatic drive. They are building them just as they inherited them from Guilin, the original manufacturer, but are making subtle improvements as they go.
What are you referring to as “the little Yuchai loader”? The YCT crawler? Yuchai does make construction machinery with hydrostatic drives, ie: all of their excavators have hydrostatic drives.
There is another crawler dozer/loader in the import market. Not sure if it's available in the US yet, or if it's priced competitively with Yuchai, but it knocks Yuchai out of the game as far as I'm concerned.
There is a patented hydrostatic drive system already available on the market that has been used in all kinds of machinery including loaders and dozers.
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Actually, at one point I was considering taking the motors, pump, and controls out of my skid steer and installing them in the Yuchai dozer, but common sense prevailed as there would be no market value to it and the Yuchai dozer audience is very limited.
You can check out my page here:
https://www.facebook.com/yuchaidozer
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I heard the rumor mentioned on an earlier version of this site about 5 years ago, at the time I was asking about the little YCT 282 with 2 cyl engine (it proved impossible to import into my country). By the little loader I meant the YCT 306 with loader equipment. I know of many crawlers with a variable pump driving a fixed displacement motor for each track, my idea was to save money by keeping the conventional or diff steer & just use one variable pump & one motor for cheapness, (a Sweedish guy did just this when he converted an old Allis HD6 crawler). That said I read the Eaton transmission pump on the Terramite costs $3000 to replace (probably more than the cost of the YCT clutch & gearbox), so a non starter. It was just that you would have all speed & FNR direction, along with braking in just one lever.
The Hamney crawler I very much admire, I can see just one disadvantage, that is it's weight. At 5 tons it could not be transported on a trailer in the way the 306 could. I would though be interested to know what transmission was in use. The Japanese makers believed that a torque converter had no place on a crawler sub 100 Hp, as it sapped power particularly at part throttle. Mitsubishi made the Cat 941 & later 931 under license, the versions for their area market had a 'direct drive powershift' with a foot clutch 'inching pedal'. Komatsu did a similar thing, very pleasant to drive as the revs were there to crowd & lift the bucket, with a soft transition to reverse. (not sure if this was a wet 'oil clutch' but think so). The red Hamney also seemed to have a european style offset backhoe as an option. Have you guys had any trouble with low sulfur diesel? It plays havoc with rotary distributor mechanical fuel pumps, many people over here add a lubricity enhancer additive usually Millers or Opti Lube. Standadyne is of no help for this.
As far as I know the Liebherr & Deere trackloaders have much in common. The only other major make is Cat, & they dropped the front engined 933 & 935 hystats recently. I am a bit surprised the Chinese still keep the faith in small crawler loaders as there is supposed to be no market demand for them! That said an old guy over here runs an old 943 for new freeway batter finish grading & several big contractors fight for his services. he makes a good living.
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I can only read parts of your post due to space constraints,
maybe someone else can read it.
So I'm not really sure if you have a problem with your
machinery, are making an inquiry, or just want to chat.
Is there something specific someone can help you with?
Where are you located?
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