3ph problem

   / 3ph problem #31  
Looks just like my 2020 Tom. You don't have one:confused: :confused: :confused:
 
   / 3ph problem #32  
Dick

What has me not owning a Yanmar got to do with anything? You said it yourself "they no longer have them".

Tom

PM me your email address and I'll send you a scan of the page in the manual that states such.

Eugene
 
   / 3ph problem #33  
I don't understand the problem exactly. On my 1602D, there's no such drop control valve, but the lever I use to raise and lower the 3ph controls the drop speed, the further I push it down, the further it goes, if I move it downward smoothly, the 3ph drops smoothly with the lever position...........
 
   / 3ph problem #34  
Thanks, Eddie. Looks like it's back to either using the service lock in spite the advice against it or being smooth and slow with the 3pt position lever ala Jagmandave's example. (Thanks Jagmandave).

In fact, thanks to all the kind folks who've participated in this attempt to improve my education. I appreciate it. Now, I believe my questions/concerns have been satisfied so I think I'll go try to put my tractor back together. Thanks again to all!
 
   / 3ph problem #35  
The drop control level is an orifice valve.. if you tighten it up, you can slap your 3pt control all the way down, and the oil will only be able to escape the 3pt cyl slowly.. thus making the implement very slowly settle to the ground.. It is usefull with heavy implements that you don't want to accidentall 'slam' to the ground.

I looked at his posted pic.. boy.. sure looks 100% different than what is on the 1700

Soundguy
 
   / 3ph problem #36  
Tom

I sent you a scan. Let me know if you get it or not.

Eugene
 
   / 3ph problem #37  
Interesting comments in the manual page Eugene mailed to me (Yep, I got it. Thanks!). Seems in that particular design, the service lock valve acts almost like a diode/choke in an electrical circuit - has a slider in the valve body that is moved by oil flow such that the valve offers free flow to the fluid in "raise" mode and slides to choke or restrict cylinder outflow in the "lower" mode.

Also, comments in this thread makes it look like at least one Yanmar model in the XX02 series and two in the XX20 series operate without a separate drop rate control. Can't help but wonder if the "guts" in those units aren't designed similar to Eugene's. Hmmm... Design change in later models??? Wonder what the FXXX models do for drop rate control.

I'm not going to tear into mine to find out, but I have observed that "throttling" the service lock to limit drop rate doesn't seem to affect lift speed nor do I see any indications of excessive load on the hyd. pump (noise, whining, etc). YMMV!
 
   / 3ph problem #38  
I use the big round knob under the front of the seat to let my finish mower drop at a speed that it won't slam down. Been working that way for a year.
 
   / 3ph problem #39  
Tom_Veatch said:
Also, comments in this thread makes it look like at least one Yanmar model in the XX02 series and two in the XX20 series operate without a separate drop rate control. Can't help but wonder if the "guts" in those units aren't designed similar to Eugene's. Hmmm... Design change in later models??? Wonder what the FXXX models do for drop rate control.
My Fx24 dosn't have the valve being discussed, only the big knob below and in front of the seat. On these models you can't see any portion of the trans from the seat.

I'm trying my damnest to figure out how the draft control on my tractor works and have recently started a thread with questions about 3pt hyd operation. Hope others will look and comment if they have any knowldege.
 
   / 3ph problem #40  
Let's think for a moment about these tractors. Remember the commercial "Parts is parts!"? The concept celebrated in that ad probably describes the spectrum of Yanmar tractors that we have better than most of us think!

Some Yanmars were imported (US models) direct, others came over in shipping containers and were more or less intact. Why should we be surprised if tractor "A" (model YM-yadada) is not the exact and precise duplicate of tractor "B" (also model YM-yadada)? Seems more likely to me (IMHO) that we should be amazed that the two are even close!


cvt
 

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