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I have an operating question about my new 739. I have the 54HC deck and the control to lower and raise the deck seems very finicky. I’m not sure if I’m doing something wrong or what and maybe I need to be corrected. Its seems like a straight forward process and really cant screw up so maybe something is wrong with the controls. I’ve got plenty of RPM but I have to move the control stick back and forth several times before I get any kind of response. Normal?
 

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I have an operating question about my new 739. I have the 54HC deck and the control to lower and raise the deck seems very finicky. I’m not sure if I’m doing something wrong or what and maybe I need to be corrected. Its seems like a straight forward process and really cant screw up so maybe something is wrong with the controls. I’ve got plenty of RPM but I have to move the control stick back and forth several times before I get any kind of response. Normal?
No, it should respond almost instantly unless you have the hydraulic lock out valve partially closed, assuming you have one.
 

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Do you have a snowblower or plow? If so you have a diverter valve up near the SCV hose hookups. It has to be turned all the way one direction for snowblower use and all the way the other direction for mower use. It diverts hydraulic flow between the mower lift arms and the SCV for one circuit. I forget which way it has to be for mower use, but I *think* it is all the way out. Find it and turn it all the way opposite of where it is currently and see if that changes things.

If you don't have a snowblower/plow and no diverter valve then I'm not sure what is going on. The deck should raise and lower smoothly and quickly even at idle.

Rob
 

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I would agree that the diverter valve is the first thing to check. By closing the valve it prevents sending hydraulic pressure to the cylinder that controls deck lift and 3pt hitch lift (if you have that option). This is desireable because in the winter when plowing it is the circuit used to angle the blade or when blowing to turn the chute direction. If the valve sends pressure to the rear cylinder for mower deck and 3pt lift there is a delay before you build up enough pressure to angle the blade or turn the chute. Also, not an issue with the blower chute, but the blade can't hold its angle as well with the valve open. This is because if the blade is straight there is always a little pressure to angle one way or another and that pushes on the angle cylinder which bleeds pressure back to the rear cylinder.

This diverter valve was standard on all X machines like on my X585 with earlier model years. They then made it optional but I think it came standard on SE as the X585 transitioned into the X7xx line. It is one of those things that was there sometimes and not other times. If not included, many times they were added.

It is also one of those things many people forget about come spring.
 

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Discussion Starter #5
No other attachments. I'll have to see if my unit included the diverter. Zero response from my dealer yet which seems to be about the norm.
 

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Is this new behavior or a new tractor to you? One guess is if you lower the deck it only goes down to the depth stop. If you continue to hold the hyd lever down the cylinder keeps moving but the deck doesn't. If you then raise, there is a "lag" in response as the cylinder is moving but you don't see it (and the deck doesn't raise until the cylinder travels enough to pull it off the depth stop mechanism). Hope this makes sense.
 

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Discussion Starter #7
dkarst

its a new tractor took delivery last week. When this happens I hear nothing at all no hydro sounds or anything. I think I'd hear something going on even if the deck was at stop and the cylinder continues to travel.

The dealer/tech is coming out Friday. Just hope its not the guy that delivered it because he couldn't even tell me where the oil drain was (no kidding either). I also asked him if the deck was leveled... his answer... well it should be. NOT

and upon delivery my trans fluid was dry to the bone.

Is this new behavior or a new tractor to you? One guess is if you lower the deck it only goes down to the depth stop. If you continue to hold the hyd lever down the cylinder keeps moving but the deck doesn't. If you then raise, there is a "lag" in response as the cylinder is moving but you don't see it (and the deck doesn't raise until the cylinder travels enough to pull it off the depth stop mechanism). Hope this makes sense.
 

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dkarst

its a new tractor took delivery last week. When this happens I hear nothing at all no hydro sounds or anything. I think I'd hear something going on even if the deck was at stop and the cylinder continues to travel.

The dealer/tech is coming out Friday. Just hope its not the guy that delivered it because he couldn't even tell me where the oil drain was (no kidding either). I also asked him if the deck was leveled... his answer... well it should be. NOT

and upon delivery my trans fluid was dry to the bone.
If your transaxle fluid level was so low that it wouldn't read on the dipstick, then this could have something to do with it. Have you checked the level recently? If it is very low, then this could cause goofy reactions like you're experiencing. Obviously, if it was completely empty, then your tractor wouldn't move at all.

Additionally, if your level was that low, then I would really let the dealer have it. That's absolutely pathetic. I wouldn't always expect a delivery driver to know the answers to questions about every tractor they deliver though. They aren't typically a certified mechanic.
 

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Yeah that might be related to the problem. Sounds like your dealer is just like the one that I have a couple miles from my house.
 

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and upon delivery my trans fluid was dry to the bone.
I have a 2017 X738 and my transaxle fluid was quite low when I checked mine at around 20 hrs. I never checked it before that because I did not think I should have had to. My mistake! My implements were lagging and sluggish. I told the dealer, he gave me all the transaxle fluid I needed. It took a couple trips back and forth to the dealer but I got it and now it works great. Hope this helps and that you are able to get this little "kink" worked out!
 

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dkarst

and upon delivery my trans fluid was dry to the bone.
Unfortunately, this is fairly common as the air etc works it way out of system after factory fill. Remember the manual states to measure the level with dipstick PLACED on top of hole, NOT SCREWED IN.

Please let us know the resolution.
 

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I have a 2017 X738 and my transaxle fluid was quite low when I checked mine at around 20 hrs. I never checked it before that because I did not think I should have had to.
This is the daily checklist from my X739 manual.
 

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Discussion Starter #13
OK, so here is the update after the tech visit last Friday. He arrived tried the deck and of course it went up and down perfectly. Go figure right! Well, a few days before I topped off the transaxle fluid (J20) which was 3/4 of a quart low and proceeded to cut the grass that day. The deck still wasn't very responsive to controls. A few days later the tech arrives fires it up and the controls are very responsive. He speculated that after the fill and run the air was finally purged with the fluid at the proper level.

Good news I'm happy.

I asked if we could go over a few maintenance areas which he was super helpful with. First the 54HC leveling. Way out of wack from delivery. I had attempted to review the levelness but I couldn't determine where to level the front from so I left it alone. The tech said forget the stupid tool and use the blade leveler. Which makes perfect sense (level the blades not the deck).

Oil change, he too looked for the petcock at the drain. Couldn't find it. Then he said, oh look they now ship with a ball valve. I had seen that before and I pointed out that its in the open position. He immediately checked the oil and it was at the proper level (which I check before each mow). He stated the ball valve handle is reversed so I does get knocked open. Good deal.

Overall I'm happy with the onsite service from my dealer. Just wished this stuff was addressed prior to delivery.
 
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