Having a blast with our new M62

[JWR]

The "recommended speed for the PTO" is the engine rpm that produces the standard rpm at the PTO through gearing, normally 540 rpm. So far as I know ALL tractor PTOs are gear driven. The only hydraulically driven PTOs I've ever heard of are external attachments driven by an hydraulic motor -- for example mounted on the front of a tractor so one could use the attachment PTO for things like a front mounted 3 point hitch set of implements like maybe a rotary cutter, etc. You can buy gadgets of that sort.

I am reasonably sure that what your dealer meant, saying that, was that running the motor at the recommended speed for the PTO (e.g. the engine rpm that produces a nominal 540 rpm at the PTO) also runs your main hydraulic pump at its' normal speed (for things like your remotes, running the loader, etc.) That indirectly means your hydraulic pump would be running at it's normal rpm and thus putting out its' normal rated gallons per minute. The output of the tractor hydraulic pump is dependent on engine rpm.

The engine rpm relates to, and sets, BOTH the PTO rpm and the gallons per minute output of your hydraulic pump but that does NOT mean the PTO has anything otherwise to do with your hydraulics.

 

[MutzFarm]

The "recommended speed for the PTO" is the engine rpm that produces the standard rpm at the PTO through gearing, normally 540 rpm. So far as I know ALL tractor PTOs are gear driven. The only hydraulically driven PTOs I've ever heard of are external attachments driven by an hydraulic motor -- for example mounted on the front of a tractor so one could use the attachment PTO for things like a front mounted 3 point hitch set of implements like maybe a rotary cutter, etc. You can buy gadgets of that sort.

I am reasonably sure that what your dealer meant, saying that, was that running the motor at the recommended speed for the PTO (e.g. the engine rpm that produces a nominal 540 rpm at the PTO) also runs your main hydraulic pump at its' normal speed (for things like your remotes, running the loader, etc.) That indirectly means your hydraulic pump would be running at it's normal rpm and thus putting out its' normal rated gallons per minute. The output of the tractor hydraulic pump is dependent on engine rpm.

The engine rpm relates to, and sets, BOTH the PTO rpm and the gallons per minute output of your hydraulic pump but that does NOT mean the PTO has anything otherwise to do with your hydraulics.

Agreed.

 

[seemynewname]

The "recommended speed for the PTO" is the engine rpm that produces the standard rpm at the PTO through gearing, normally 540 rpm. So far as I know ALL tractor PTOs are gear driven. The only hydraulically driven PTOs I've ever heard of are external attachments driven by an hydraulic motor -- for example mounted on the front of a tractor so one could use the attachment PTO for things like a front mounted 3 point hitch set of implements like maybe a rotary cutter, etc. You can buy gadgets of that sort.

I am reasonably sure that what your dealer meant, saying that, was that running the motor at the recommended speed for the PTO (e.g. the engine rpm that produces a nominal 540 rpm at the PTO) also runs your main hydraulic pump at its' normal speed (for things like your remotes, running the loader, etc.) That indirectly means your hydraulic pump would be running at it's normal rpm and thus putting out its' normal rated gallons per minute. The output of the tractor hydraulic pump is dependent on engine rpm.

The engine rpm relates to, and sets, BOTH the PTO rpm and the gallons per minute output of your hydraulic pump but that does NOT mean the PTO has anything otherwise to do with your hydraulics.

The old Case backhoes (from the 1980's back) could be had with a hydraulic PTO and 3 point (mod hitch) in some configurations. They were very power limited compared to a mechanical PTO. The Kubota TLB series is like a modern version of those backhoes and just as useful.

 

[rScotty]

The "recommended speed for the PTO" is the engine rpm that produces the standard rpm at the PTO through gearing, normally 540 rpm. So far as I know ALL tractor PTOs are gear driven. The only hydraulically driven PTOs I've ever heard of are external attachments driven by an hydraulic motor -- for example mounted on the front of a tractor so one could use the attachment PTO for things like a front mounted 3 point hitch set of implements like maybe a rotary cutter, etc. You can buy gadgets of that sort.

I am reasonably sure that what your dealer meant, saying that, was that running the motor at the recommended speed for the PTO (e.g. the engine rpm that produces a nominal 540 rpm at the PTO) also runs your main hydraulic pump at its' normal speed (for things like your remotes, running the loader, etc.) That indirectly means your hydraulic pump would be running at it's normal rpm and thus putting out its' normal rated gallons per minute. The output of the tractor hydraulic pump is dependent on engine rpm.

The engine rpm relates to, and sets, BOTH the PTO rpm and the gallons per minute output of your hydraulic pump but that does NOT mean the PTO has anything otherwise to do with your hydraulics.

Before getting into the PTO, I gotta say that AFAIK, the hydraulics & mechanical systems of the M59 and M62 are mostly identical. The main difference being the new emissions equipment on the M62. A secondary difference is that the manual foot clutch on the M59 isn't there on the M62. Given the HST+ transmission, the manual foot clutch was sort of redundant anyway - but nice to have.

Sooo.... just to clear up a point. The M59 (and probably the M62) PTO is a standard gear driven type for continuous duty at full engine power. The references in the workshop manual to the PTO hydraulics are for the PTO clutch. The PTO itself is the independent type which means it has its own own dedicated multiplate clutch - and it is that PTO clutch which uses hydraulic pressure to engage/disengage. How it works is that when the PTO engagement lever is thrown, the PTO control circuit momentarily takes a portion of the power steering flow and uses it to engage the PTO clutch. But the PTO powershaft itself is the traditional mechanical type.
rScotty

 

[MutzFarm]

M62. Well waiting on verdict. Was going 3 miles down the road to do a little backhoe work. Decided I will just drive the M62. Not that far. Done it several times before. About half way there and all 4 tires locked up while in 2wd. Moved it from High range to Mid range. Was not easy. Moved from 2wd to 4wd. Put it back in High range and 2wd. Drove about 60ft and all 4 tires locked up again. Shut it off for about 3-4 minutes. Turned back toward the house. About half way back all 4 tires locked again. Called wife to come get me so I could get my dually and trailer and hauled it to the dealer........Now we wait.......

 

[Hersheyfarm]

Now that sounds like a blast!

Hope its simple and will be watching. Before I had this m62 I had an m59 and lost both hydraulic pumps at about 75hr. Not fun to deal with. Are you in warranty?

Is there a chance you were bouncing enough to make the 4 wheel lever try to engage?

 

[MutzFarm]

Yes under warranty. They claim the bearings in the ring and pinion in the front axle went out. Only like 830 hours and less than 2 years old. Well we will see if this fixes it. Probably be a week. 3-4 days for parts and then they need to put it back together.

 

[rScotty]

Yes under warranty. They claim the bearings in the ring and pinion in the front axle went out. Only like 830 hours and less than 2 years old. Well we will see if this fixes it. Probably be a week. 3-4 days for parts and then they need to put it back together.

I've been a mechanic for so long that I'm out of date on lots of things - but probably not out of date on that front drive axle as it has been around pretty much unchanged since the 1970s and is a simple mechanical system common to lots of tractors.

1. First of all, thankfully that is a sort of lucky failure because that front axle is a separate self contained system from almost the whole rest of the tractor.

2. The problem with it is that bearings don't just fail for no reason. And especially not more than one. Those ring gear ball bearings are oversize, and the pinion bearings are tapered rollers. Having any of them fail is very rare - although I do agree with replacing as many as you can get to if one should fail. Just how far to extend that to replacing other front axle parts is always the question that the mechanic wrestles with. There's no real answer; just policy and philosophy. At the least, I'd ask that the warranty begin again for the front axle. That seems to me to be a reasonable compromise between owner and manufacturer.

3. Fixing anything is the easy part. Figuring out why it failed in the first place is the hard part....but it still has to be done on any job. Especially so when the failure is so unusual.
If the tires are stock, and the axle has oil, then the first place I would look would be the 4WD engagement mechanism. If it is not disengaging properly then the tractor could be in 4wd when it shouldn't - like at road speed - and then the front-to-rear differential ratio might just possibly build up enough stress and heat that it could knock out the front ring and pinion assembly. So maybe ask them to check that foot lever and disengagement mechanism.

Hope you can get it back quickly - great machines.
rScotty

 

[mike69440]

I was kind of questioning a front axle failure on a M62, as the M62 has a lot more front axle than my humble +2200 hour L39 that I incidentally never ever overload?

 

[JWR]

The real surprise is that the tires on the front of that L39 didn't go flat ...Besides that you were able to pick up those rocks...