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post #1 of 21 Old 10-13-2019, 10:35 PM Thread Starter
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Thumbs up New X738 . . . some questions

OK so we succumbed to the 60-month 0% financing. I really thought I'd find a good deal on a used one like we do our cars (don't mind doing some wrenching), but the used market is sparse for the x700's here in TN and the rest is history. The local TriGreen dealer in Manchester did pretty well on price too. I wanted 4WD (been stuck plenty of times) and thinking I'd like some kind of FEL some time in the future. We have 8 acres in middle TN and have been mowing about 3 or 3-1/2 of it with craftsman GT's for 13 years. It's a bit rough and hilly. After the 3rd frame weld repair I started looking for what else is out there that's more durable. Been lurking here a while through the shopping process. Thank you to everyone for sharing your knowledge and experience.

So a few questions. Just got to 2.5 hours today.

Any special procedure for raising and lowering the deck? Do you have to turn the deck off, set the parking brake? Sort of seems like it. What's happening when the deck doesn't move and the knob won't turn? Several times I had to cycle the lever a few times before the deck moves. I can hear the hydraulics trying to but it seems stuck. Once it moves it seems to raise and lower normally. Mows fine too. Leveled the deck and it's giving a pretty good cut. Also, with it all the way up and the blades running I'm getting some noise so I didn't run it that way for more than 5 seconds. Are you not supposed to run the deck with it all the way up? Too much angle on the u-joints?

Also, how do you generally interpret the fuel gauge? Going up hill the light starts flashing and coming back down I have 3 solid bars. All that really tells me is I'm probably below half a tank.

Thanks!
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post #2 of 21 Old 10-14-2019, 07:10 AM
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Re: New X738 . . . some questions

It sounds like you are low on hydraulic fluid. I had the same problem with mine during the 1st few hours of operation. Check the fluid level with the dipstick under the seat. Be sure you are level and check with the dipstick NOT screwed in. After only a few hrs., mine was almost 2 qts. low. Hope this helps.
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post #3 of 21 Old 10-14-2019, 08:53 AM
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Re: New X738 . . . some questions

Do check your hydro fluid as already recommended. I have the older x728 (now 10 years old), but on it you do not need to turn off the PTO for the blade, nor stop, nor set parking brake. Sounds like your hydro system is already overworked just driving the transmission and multiple motors, and not able to raise the deck. Remember, your hydro system takes around 12 quarts to be full, including the front servos. Good luck, if your experience is like mine, you'll wonder how you ever survived without 4WD

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post #4 of 21 Old 10-14-2019, 11:48 AM
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Re: New X738 . . . some questions

Quote:
Originally Posted by Pete_Craftmn_TN View Post

Any special procedure for raising and lowering the deck? Do you have to turn the deck off, set the parking brake? Sort of seems like it. What's happening when the deck doesn't move and the knob won't turn? Several times I had to cycle the lever a few times before the deck moves. I can hear the hydraulics trying to but it seems stuck. Once it moves it seems to raise and lower normally. Mows fine too. Leveled the deck and it's giving a pretty good cut. Also, with it all the way up and the blades running I'm getting some noise so I didn't run it that way for more than 5 seconds. Are you not supposed to run the deck with it all the way up? Too much angle on the u-joints?

Thanks!
Do you have the lockout valve installed? It's located by the hydraulic hookup's and is a round knob. Make sure it's open, as in counter-clockwise.

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post #5 of 21 Old 10-14-2019, 12:23 PM
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Re: New X738 . . . some questions

Another option for a Deere with 2 hours on it is to get someone out to your place from Trigreen Deere to make sure everything is as it should be and answer every one of your questions.


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post #6 of 21 Old 10-14-2019, 12:27 PM
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Re: New X738 . . . some questions

The cylinder that raises and lowers your deck has some significant over travel available to it as you lower your deck. You don't notice the over travel as you lower your deck because the deck will hit the mechanical stop set by your "deck height knob". If you continue to hold your lever in the lowering direction once the deck has hit that mechanical stop set by your knob, the cylinder will continue to over travel until it hits full extension when it will stop. The next time that you raise your deck, the cylinder will begin to travel once you activate it but it first has to take up the over travel before it will start to raise your deck. That is the delay that you are seeing. If you can develop the habit of releasing the lowering lever as soon as the deck hits the mechanical stop set by your deck height knob when you are lowering it, you will be happier. The next time that you go to raise the deck it will respond immediately. Practicing the technique will help -------. If you want to see it in action, lay down on the ground next to your deck so that you can watch the cylinder in action and have someone raise and lower it as you watch ---- you'll see what I mean.
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post #7 of 21 Old 10-14-2019, 08:13 PM
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Re: New X738 . . . some questions

I have a new x758 and I have noticed the lag in lifting the deck you have. I attributed the lag to what Bruce indicated above. Also the higher the engine speed the quicker the response time. I actually find my lever to be really stiff.

I also second checking the hydraulic fluid. Mine was delivered with the level so low you couldn’t see it on the dip stick. Others have had the same issue with the x7 series.
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post #8 of 21 Old 10-14-2019, 10:29 PM Thread Starter
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Re: New X738 . . . some questions

Thanks folks for the responses. At about 1 hr I checked the trans fluid. I was able to add about 1 qt to get it up to the hatch on the stick, just laying it on there. Yeah I couldn't see anything on the dipstick the first time I checked it. I'll check it again.

Jere, I survived without 4WD by getting stuck then getting the atv or 2nd mower to help move it, sometimes getting the wife out to help as the sun goes down. Fun!

Celltech, I didn't ask them to install a lockout valve. I'll look.

Steve, yes I'm gonna call the dealer. Was curious to get thoughts from you folks that have experience with these machines.

Thanks Bruce for the explanation of the deck cylinder. I'll watch for the lag.

Yeah I find the lever to be stiff also. I pretty much had it at full throttle while mowing over the week-end, so engine speed is up.

So it sounds like in normal operation the deck raises and lowers while running and there shouldn't be any extra noise when running fully raised. I'll get TriGreen to look at it unless the issues are just low fluid.

Thanks again guys for your help. Pict attached.
Pete
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post #9 of 21 Old 10-15-2019, 12:35 AM
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Re: New X738 . . . some questions

Quote:
Originally Posted by Pete_Craftmn_TN View Post
Thanks folks for the responses. At about 1 hr I checked the trans fluid. I was able to add about 1 qt to get it up to the hatch on the stick, just laying it on there. Yeah I couldn't see anything on the dipstick the first time I checked it. I'll check it again.

Jere, I survived without 4WD by getting stuck then getting the atv or 2nd mower to help move it, sometimes getting the wife out to help as the sun goes down. Fun!

Celltech, I didn't ask them to install a lockout valve. I'll look.

Steve, yes I'm gonna call the dealer. Was curious to get thoughts from you folks that have experience with these machines.

Thanks Bruce for the explanation of the deck cylinder. I'll watch for the lag.

Yeah I find the lever to be stiff also. I pretty much had it at full throttle while mowing over the week-end, so engine speed is up.

So it sounds like in normal operation the deck raises and lowers while running and there shouldn't be any extra noise when running fully raised. I'll get TriGreen to look at it unless the issues are just low fluid.

Thanks again guys for your help. Pict attached.
Pete

All of the responses to your questions have been spot on. I also own a new X738 which has made climbing hills a breeze. The hydraulic front drive also does an incredible job of NOT tearing up my lawn when making sharp turns.

The question concerning a lockout valve is really only relevant if you also have front hydraulics for a blade, blower, etc.. When using the front attachments all of the mid and rear (3pt) attachments should be brought to their highest lift point, eliminating movement of those attachments while using the front blower, blade, etc.. The lockout valve is then closed which eliminates hydraulic flow through the cylinder(s) for those attachments. This results in much faster response time from the front attachments.

A lockout valve is not a part of the purchase unless you purchase a front attachment that requires it.

Be sure you raise your deck all the way before adjusting the cut height using the floor knob. It should turn easily. Have fun, the 738 is a beast.

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post #10 of 21 Old 10-15-2019, 06:34 PM
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Re: New X738 . . . some questions

If you don't have a snowblower or certain other front-mounted attachments that require hydraulics you won't have a lockout valve. That is not a stock feature. The valve comes in the install kit of the snowblower, et al.

Good tip, Bruce, about the cylinder extension. I've noticed that lag before and didn't put 2+2 together to figure out that's what it was from.

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post #11 of 21 Old 10-15-2019, 06:37 PM
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Re: New X738 . . . some questions

Oh, as for the fuel gauge, yeah that's just how it is. I rapidly got used to paying attention to the hours since I last filled to determine when it is actually getting near empty instead of the gauge. It just so happens that I mow 7 acres, which takes around 4.5 hours, and that is pretty close to a full tank of diesel (on my x758). I've never run out. But quite often the low-fuel light is blinking the warning at me for that last 45 min to an hour of mowing. And, of course, the hill situation at many other times.

I guess the short answer to the question is: "Don't trust the fuel gauge unless you're on flat ground and not jolting around too much.

Rob

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2010 2520 w/61" H130 loader, TA 42" forks, KK 60" Pro tiller, iMatch quick hitch, KK middle buster
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post #12 of 21 Old 10-15-2019, 10:14 PM Thread Starter
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Re: New X738 . . . some questions

Thanks guys. Yeah I don't have a lock-out valve. Thanks for the explanation. Checked the trans fluid this morning and it's at the right level. Yes it seems my perception of the deck being stuck was the delay Bruce explained and apparently turning the knob requires the deck be raised up. So I think I understand the deck operation now. It does still have the problem of the noise when raising the deck with the blades turning. Loud mechanical grinding noise. I took it for a spin tonight and still doing that. I take it that's not normal. It seems fine with the deck down. Well I'll have the dealer look at it. BTW it's the 60" deck.

B-Blue thanks for feedback on the fuel gauge. Kind of flaky but at least it has one. With all that fancy display it would be nice to have just a plain clock.

Last edited by Pete_Craftmn_TN; 10-15-2019 at 10:15 PM. Reason: Adding deck size
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post #13 of 21 Old 10-16-2019, 08:01 AM
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Re: New X738 . . . some questions

When you check the transmission fluid make sure that you do NOT screw the dip stick in. The correct method according to Deere and the manual is to push the dipstick back in, but not screwed in.

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54" front blade and 3 point hitch
48" mower deck
48" roller, 48" York rake, de-thatcher, aerator, 48" box blade
15HP 5" PowerKing chipper, JD 125# electric spreader
Assortment of sleeve hitch adapters, 3500# hitch mounted winch

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post #14 of 21 Old 10-16-2019, 09:45 AM Thread Starter
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Re: New X738 . . . some questions

Thanks oldgibsonguy. Yeah I'm checking it that way and the fluid level looks right. I think the noise is a separate issue. Am I correct in assuming in normal operation I should be able to operate the deck at any height? I plan on having the dealer check it.
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post #15 of 21 Old 10-16-2019, 12:14 PM
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Re: New X738 . . . some questions

Yes, you should be able to operate the deck at any height. Obviously you have some thing rubbing that should not be -------
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