Slow 3pnt. Movement?

[yanman]

The 3 pnt. lift on my 1510 moves very slow, I have tried to adjust the valve under the seat but it is stuck. Is this the correct valve for adjustment? Where can I get a replacement? What can I expect to pay?

 

[normde2001]

That should be the right valve, assuming it is causing the problem, however you don't want to replace it, you want to free it up, which you would have to do to replace it anyhow. If it recently slowed down, it's probably a clogged hydraulic filter, but you still need to free that valve (WD40, Liquid Wrench, etc.).

 

[EFC]

which direction is it going slow in? the valve under the seat controls down speed only. The hydraulic screen would effect up speed only.

 

[wallysue]

Yanman, on my 1500D the round knob under the front of the seat is the lock valve for the 3ph. If it is closed or nearly so the lift will be slow or stopped. The down speed adjustment is the much smaller valve on the side under the seat with a lever looking handle. My round handle valve turns easy and is just over three turns from open to close. Wally

 

[yanman]

The movement is very slow going down. On the lifting side it is pretty quick. The problem started when I had to replace the transmission cover in which the valve is located. I got a used cover with the valve and all included. The old valve was easily adjustable, but this one seems to be stuck in position. When I replaced the cover, the old one went back to the dealer. I had broke the 3pnt. Lift lever right where it goes thru the cover.

 

[EFC]

just need to free up the knob under the seat and you will be able to adjust downspeed.

 

[yanman]

Any suggestion on how to free the valve? Can I remove the valve frome the housing to work on it?

Thanks for the help.

 

[wallysue]

Yanman, Here is a scan of the 1500D parts. The 1510 could be maybe kinda the same. It looks like number 12 and 11 hold the valve 9 in. Wally

 

[EFC]

Sure! No much room for error. Retainer nut is probubly to tight or the oil around the needle has hardened up. Plenty of WD-40 to help loosen it up and some clean oil to put it back together with. Remember have fun!/w3tcompact/icons/grin.gif

 

[wallysue]

Attached is a scan of the knob and housing. Once again it is from a 1500D and might be maybe kinda the same. 69 looks like the part the valve stem is threaded in to.

 

[wallysue]

Yanman, Do the 1500 parts look anything like the 1510? Just wondering how much was changed.

 

[yanman]

Wallysue, I don't believe the 1500 and the 1510 have the same setup. I have removed the adjustment assembly, and it looks like it is simply a threaded adjuster screw that goes thru a bushing that is both internally and externally threaded. I have sprayed it with WD40 and penetrating oil, didnt help. I have also tried heating the bushing with hopes the thermal expansion would help, Still no luck. Any other ideas would be appreciated.

 

[gbirky]

yanman,
I have attached a scan of the hydraulic valve and housing from my YM1510 parts manual. I doesn't even show the bushing you are talking about, but it doesn't appear that there is any retaining nut, etc. Keep at it - you should be able to free it up, just be careful not to break anything.

Greg

 

[wallysue]

Oh well they are completely different 1500 and 1510