Update on all 7520s

[SPYDERLK]

Brandi and Dougster. Yes there are a lot of discrepancies in the literature. Iv seen all those #s and I wish I knew which are right. i hadnt seen the 6.2 sec boom raise associated with the 6520 tho, but that wouldfit what the tech rep said about them putting 17GPM pump on both.
The Hi Idle rpm is limited at 2500 on mine. Even tho a 2750 redline you cant get there without changing a factory set adjustment. No reason to cuz it makes the power at low-mid 20s. Wed, Ill be going to the dealer where they are working on my engine. A Mahindra tech rep will be there. I will ask a lot of questions over and above the engine problem. The correct and specified performance of the tractor is very important to me - thats why I chose it. At 17GPM the loader should go from bottom to top stop in 5.2 sec. That would often be faster than you want, but you dont need to rev above 1800 or so to have surplus power for loader work - so theres plenty of the usable rpm range to slow it down. My loader has lots of omphh but no speed unless the engine is really buzzing. Ill be working on getting an explanation and remedy. Ill keep yous posted.
larry

 

[CuzPat62]

Dougster,

To answer your question, my loader has been slow from the day the tractor was delivered. My dealer had to order the tractor because they did not have a 7520 in stock. It is not a problem that has developed over time. It was like this when it was pulled off of the trailer.

The tractor handles well and is stong but I can't help but wonder if I would have been better off going with my second choice in tractors instead of the Mahindra. I have had numerous small problems with the tractor and now the newest problem, the smoking.

No-one seems to even want to address the slow loader problem. As far as Mahindras literature on the 7520, it is filled with indiscrepencies.

Not sure at all I'd buy the Mahindra if I had it to do all over again. In my opinion the Mahindra folks ought to be doing all they can to change customers attitudes who are like mine.

I hope somebody figures out the slow loader problem. I really think it is going to be a design issue or a part failure issue somewhere. Too many 7520 owners complaining of the same problem.

 

[Dougster]

Dougster, To answer your question, my loader has been slow from the day the tractor was delivered. My dealer had to order the tractor because they did not have a 7520 in stock. It is not a problem that has developed over time. It was like this when it was pulled off of the trailer.

The tractor handles well and is stong but I can't help but wonder if I would have been better off going with my second choice in tractors instead of the Mahindra. I have had numerous small problems with the tractor and now the newest problem, the smoking.
No-one seems to even want to address the slow loader problem. As far as Mahindras literature on the 7520, it is filled with indiscrepencies.

Not sure at all I'd buy the Mahindra if I had it to do all over again. In my opinion the Mahindra folks ought to be doing all they can to change customers attitudes who are like mine.

I hope somebody figures out the slow loader problem. I really think it is going to be a design issue or a part failure issue somewhere. Too many 7520 owners complaining of the same problem.

Hi Billy - I certainly appreciate your pain and discouragment. I don't have a dog in this 7520 fight... other than *it* being the "flagship" of the Mahindra fleet and still my "after big lottery win" dream machine. My interest is solely as a semi-retired mechanical engineer with an extensive contractual performance testing background. In my old industry, we would settle this 11.4 vs. 17 GPM question in 1 day with an accurate, well-crafted pump flow test. Yes, there would be some cost and effort to do it right, but nothing compared to the cost of your 7520s and your time spent wondering.

A key point here is that you folks MUST separate the ML275 performance spec from the 7520's hydraulic pump's performance spec. Mahindra's implied contract with you folks is that: a) The hydraulic pump will deliver 17 GPM at 2,500 RPM, and b) The ML275 loader will lift in 6.2 seconds at 2,500 RPM. While obviously related, in a strict contractual sense, they are not linked. I don't care if 17 GPM equates to a lift time of 2.2 seconds... the ML275's specification (installed on a 7520) is 6.2 seconds. That is your implied guarantee and that is your complaint/class action lawsuit on the ML275 if not met. Likewise with 17 GPM on the hydraulic pump... although if a legit pump test confirmed that was the source problem, the ML275 complaint/lawsuit might become moot.

I share your frustration and would LOVE to help. This is my thing... settling contractual guarantees and disputes with accurate performance testing. I wish I lived closer to one of you rich 7520 owning folks. With warmer weather approaching, I would volunteer my services and would spend the cash myself to do a legitimate hydraulic pump flow test and end this mystery once and for all. I am funny that way!

Down off my soap box now and fading back into the wallpaper...

Dougster

 

[CuzPat62]

I wish I lived closer to one of you rich 7520 owning folks.

I wish you did too, then you could test my tractor AND meet me and see that I am not rich! I'm making monthly payments on my 7520. Rich folks pay cash for their new tractors!

 

[RedRiver]

Hi all,

Here's what is going on. I never noticed it until the weather turned cold. My tractor has started smoking and when it does it it is pretty bad. The smoke is a bluish gray color. It does not do it on a continuous basis. It will smoke a while and then clear up and run without smoking. Then it will start back up to smoking again. If you let it sit and idle it will smoke really bad. It seems to do it worse when it is cold. Yesterday, the weather warmed up quite a bit here and it was not cold at all. I put out hay with it and it did not smoke at all. At times, this $30,000.00 new tractor smokes worse that my 1966 John Deere that I sold that was still running the original engine!

I have already contacted the dealer about this problem. He stated to me that they had recieved several complaints on this issue from other Mahindra owners. He said it had something to do with the Intake manifold heater for starting in cold weather. I believe he said that they had to order some type of device to install in the circuit which has a switch or relay in it. I think he told me it was a timer that had to be installed.

I'll respond since I didn't see a response to this.

It sounds like you are having a problem with the KSB sensor/timer. It's a very quick fix, takes 1 minute to replace. The KSB timer adjusts the amount of fuel the engine gets when the engine is below a certain temperature, therefore the tractor will smoke and sputter because it is getting too much fuel while the engine is still cold. You should received a jumper plug and a new KSB Timer relay, this will more than likely fix your problem.

These are the part #'s you need..

KSB Timer #007700570D91
KSB Jumper #007700572B91

These should be covered under warranty regardless of the length of time you've had the tractor. This is a very well known issue with Mahindra.

 

[RedRiver]

Ok;
Just came from my dealer after attempting to complete the 50 hr service on my 7520. Manage all the filters except the Power Steering filter. Did i read something wrong or what. Dealer says there is no filter in the PS. He has looked in the parts book and there in not one available????

Power steering filter number is #51460D01

 

[Dougster]

I wish you did too, then you could test my tractor AND meet me and see that I am not rich! I'm making monthly payments on my 7520. Rich folks pay cash for their new tractors!

Billy - I am so poor that the three nearest Mahindra dealers won't even let me sit on a new 7520... so there!
Dougster

 

[DavesTractor]

Alright guys. I have a 6520 with a ML275 and a 7520 with a ML275. Both are new. If I get the time later today, I'll run a test and see what they do. CuzPat, have you cleaned the paint off the return line where the hose connects? Crazy as it seems, this has been reported to cause a major slow down on the loaders on these rigs. I believe the real weight of the 6520/7520 is approx. 7200 without loader, depending on tire choice/size.

 

[RedRiver]

SPYDERLK, maybe it's a problem with control valve since you've tried everything else??

 

[DavesTractor]

Billy - I am so poor that the three nearest Mahindra dealers won't even let me sit on a new 7520... so there!
Dougster

Dougster, weren't you the guy that showed a picture of your tractor next to your wife's Vette? Poor, poor, man! If the wrong guy, my apologies! You can even test drive a 7520 here if you want, even if you don't own a new Corvette.

By the way, we've sold a lot of these. Problems have been very minimal at worst. We repair all makes of tractors, and they all have issues at times. We have a M7500 Kubota in the shop now. The local Kubota dealer rebuilt the ring and pinion at about 500 hours. We now see chunks of a brass washer and some teeth coming out when we drained the trans. It has 800 hours and has failed twice. We have a Kubota L3010 here that the range shifter is busted on, and it's the second one in 30 days we have seen. And even a Mahindra dealer like myself will acknowledge that Kubota is top notch, and even they break occasionally. We have a Kioti in the shop, an older model that lost a bearing in the transmission and chewed up some gears. And yes, we occasionally have to fix the Mahindra's as well. Sometimes it is operator induced, sometimes neglect in servicing, and sometimes things just break.

On the hydraulic pump issue, speaking directly to the Mahindra service rep and giving him specific questions is the best way to go.

 

[MtnViewRanch]

I have been wondering, out of the almost 800 Mahindra 7520's that are out there, how many have problems? There are a few that show up here on TBN, but how many would you speculate that actually have problems of concern?

My uncle had a large manufacturing company, and he was happy as long as less than 3% of the product had problems. From what we see here on TBN, it is less than 1% of the 7520's. I know that most 7520 owners don't even know about TBN, so what would you guys think, 2-3%? Do the dealers have a way of checking this? Just how good are these things?

Of course all this is of little concern to me, since mine has been great and trouble free, so far. (knock on wood)

 

[RedRiver]

from my experience we've had very little trouble from the 20 series tractors. there is one unit that has been in our shop several times but 9 out of the 10 times it has been something the user tore up on it, this unit is used commercially along with 2 other 7520's to mow up and down the side of an interstate using 15 ft. Woods Batwings.

 

[MtnViewRanch]

Dave, since you are posting now, does this mean that we aren't getting loader lift times today? Come on, it should take less than 15 seconds to do the actual testing.

 

[CuzPat62]

I'll respond since I didn't see a response to this.

It sounds like you are having a problem with the KSB sensor/timer. It's a very quick fix, takes 1 minute to replace. The KSB timer adjusts the amount of fuel the engine gets when the engine is below a certain temperature, therefore the tractor will smoke and sputter because it is getting too much fuel while the engine is still cold. You should received a jumper plug and a new KSB Timer relay, this will more than likely fix your problem.

These are the part #'s you need..

KSB Timer #007700570D91
KSB Jumper #007700572B91

These should be covered under warranty regardless of the length of time you've had the tractor. This is a very well known issue with Mahindra.

RedRiver,
After reading your reply, I called my dealer and verified the issue with him. He said yes, that is the same issue he suspected, the parts are in, they are the 2 parts you specified and he is coming by Monday to install them. He said it should take only 2/3 minutes to install. Hope this fixes the problem.

It's a hard pill to swallow when you have an almost new and almost $30,000.00 tractor that smokes like a tar kettle!

Thanks for your reply.

Dave,

Give me the specific details and the location of the hose that needs the paint scraped off. No, I have not tried to do that. Don't know where to start until I know more specifically what hose/connection you are referring to.

Thanks,
Billy

 

[DavesTractor]

Dave, since you are posting now, does this mean that we aren't getting loader lift times today? Come on, it should take less than 15 seconds to do the actual testing.

Takes me longer than that to get out of this warm office. The tractors are outside on the lot, and it is cold and rainy. Even so...for the sake of the cause...I'll try to get it done.

 

[RedRiver]

are you guys just wanting the time for lowering/raising? it's clear, sunny and warm here today...

Pat, apparently Mahindra's supplier had a VERY large batch of bad KSB sensors go out. We continuously dealt with this issue for several months in a row thats why I'm quite surprised your dealer didn't immediately know what part/issue your tractor was having.

It's a VERY quick fix, as simple as plugging/unplugging a lamp into the wall socket.

 

[DavesTractor]

RedRiver,
After reading your reply, I called my dealer and verified the issue with him. He said yes, that is the same issue he suspected, the parts are in, they are the 2 parts you specified and he is coming by Monday to install them. He said it should take only 2/3 minutes to install. Hope this fixes the problem.

It's a hard pill to swallow when you have an almost new and almost $30,000.00 tractor that smokes like a tar kettle!

Thanks for your reply.

Dave,

Give me the specific details and the location of the hose that needs the paint scraped off. No, I have not tried to do that. Don't know where to start until I know more specifically what hose/connection you are referring to.

thanks,
Billy

The KSB timers have been a nuisance. We thought we had all of ours switched out, then ran across a couple that were acting up. We are now trying to figure out if these units accidentally still had the old timers, or if the new timers weren't right. Fortunately it is a quick and easy fix.

On the hose, have your dealer point it out to you, but it is a short rubber hose that couples the return (suction) line that is going back to the pump.

 

[RedRiver]

I just went out and tested a 7520 4WD on our lot. I let it run for about 10 min. ran the rpm's at 2100 and it lifted to full height in 6 seconds flat.

 

[Dougster]

Dougster, weren't you the guy that showed a picture of your tractor next to your wife's Vette? Poor, poor, man! If the wrong guy, my apologies! You can even test drive a 7520 here if you want, even if you don't own a new Corvette.

That Vette is as old as the hills with more miles on her than Joan Rivers... and was paid for long ago when I was still working and earning mucho "OT"! Haven't had it that good since I can't remember! Can't even afford to put gas in her now. But once a month I buy a lottery ticket just so my dream of someday owning a 7520 4WD w/ML275 and 511 can be kept alive!

On the hydraulic pump issue, speaking directly to the Mahindra service rep and giving him specific questions is the best way to go.

Dave - These guys here seem quite intelligent and I believe I've read more than a few times that they have attempted to get some attention from Mahindra on this issue. Having called and written to Mahindra on other issues myself, I know how hard that can be. If you can do those ML275 lift speed tests you talked about with your new 7520 and 6520 machines, you would be doing a great service to those guys and would once and for all resolve the issue on whether or not those two hydraulic pumps/pump capacities (i.e., 6520 vs. 7520) are the same or, in fact, different. That alone would be a giant step toward solving the mystery. You and the other dealers here on TBN do all of us Mahindra owners a tremendous service. We cannot thank you enough. Where the factory falls down, you guys fill the gap. I'm not sure Mahindra would be such an attractive brand if you gentlemen were not around.

Dougster

 

[Dougster]

I just went out and tested a 7520 4WD on our lot. I let it run for about 10 min. ran the rpm's at 2100 and it lifted to full height in 6 seconds flat.

Can you save that one for me until I manage to win the lottery?

Dougster