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I have a husqvarna R316Ts AWD with a tuff torq KTM10lb front transaxle that has started to make a gear or spline grinding slippage noise if you accelerate quickly from stationary position in forward or reverse.if you take off slowly it seems ok. I have just replaced a deck belt pulley that had a faulty bearing and had disengaged the forward and aft drive units so I could push the mower around in the shed. The noise seems to have appeared since I re engaged the drive units and took the mower on a test run. I have confirmed noise is coming from front drive unit, is there any way the manual disengage mechanism may cause this issue. The arm on the disengage rod is moving all the way back to engage position, and I have jacked up the front to confirm the wheels are being driven, noting no noise is present accelerating when wheels are free to turn with no load, on jacks. Maybe just coincidence, any help on this one would be great before I have to pull the drive unit apart……thanks.

Let’s look at the simple things first. Remove both front wheels and inspect both the wheel gears and drive gears. Very common for the plastic wheel gears to wear. Also grab the drive gear and see if the axle moves up and down or side to side. This would indicate worn bearings. Wear on these parts would result in the grinding yo are hearing. Let us know what you find.

Thanks Rivets for the info, the wheel gears you mention I gather are inside the drive unit .

No, they are molded into the wheels.

Ok, great, will check that out first.

Hi, not sure about plastic gears, just standard axle with key way on these wheels.

I was wrong and gave you very bad info. Disregard my post as it won’t help you a bit Sorry about that. If you hear grinding you may have to open the hydro, but I could be wrong as I’ve not worked on any of those hydros. Again, sorry for the bad info.

No worries i gathered you were thinking of AWD push mower with plastic drive in wheels.

[ATTACHREUSE]

Workshop Manual - Rider 316T Rider 316T/s AWD - McCulloch​

https://www.mcculloch.com › doc000104979

page 32/33. Perhaps drain the hydraulic oil and see if chucks of metal come out. If so, (big suspense music).

Check to see if the driven pulley on top of the transmission is not loose or slipping first.

Yes I might have to see if any nasties in the oil, could an out of sync adjustment cause this from front to rear wheels.
don’t think it’s the drive pulley as isolating front drive stops the noise, but will check just in case.

Well I drained the oil from front and rear drive units, oil was very black, removed rear filter and found grass seeds in it and some metal particles, like small teeth….not good…..the filter looked awful, never been changed, has had a hard life before I got it…..see pics.
will remove front unit and open it up tomorrow.

FWIW
Hydros are manufactured in a dust free environment and need to be repaired in the the same
I get mine done by a chappy in Smeaton Grange Sydney who does an excellent job for a reasonable price
On the rare occasions I do one myself, I run the unit for a long enough to get it quite hot then change the oil just to be on the safe side
an extra $ 50 for oil is nothing compared to the cost of a warranty service.
You have quite a rare mower in OZ and one of the very few Husqvarna products that I would recommend to my customers .
The Stigas are actually better but the Stiga distributor down here changes more often that I change my undies thus parts are a nightmare so I generally order them from the UK $$$$$$$ or rather ( ££££££££ )
And use synthetic oil, it is the only place on a mower where it makes a real difference .

Thanks for the info, once I get rear trans apart will see what the damage is inside and hopefully its an easy fix.
Hopefully parts are ok to get here.
Cheers

Broken parts are easy, worn pumps &/or motors aren't
I get my parts from Mulligans in the USA
Tuff Torque have a local distributor but Hydro Gear is handled by Briggs & Stratton Aust who are about as much use as double sided toilet paper.
AFAIK they do not keep any parts , just complete transmissions & refuse to order them in even if you offer to pay up front .
Apparently B & S Aust is the only division of B & S that runs at a profit and that is because they only handle what is profitable for them and do not give a wrinkled rats rectum about what customers need .

bertsmobile1 said:

Broken parts are easy, worn pumps &/or motors aren't
I get my parts from Mulligans in the USA
Tuff Torque have a local distributor but Hydro Gear is handled by Briggs & Stratton Aust who are about as much use as double sided toilet paper.
AFAIK they do not keep any parts , just complete transmissions & refuse to order them in even if you offer to pay up front .
Apparently B & S Aust is the only division of B & S that runs at a profit and that is because they only handle what is profitable for them and do not give a wrinkled rats rectum about what customers need .

Click to expand...

Mmmm...might be a challenge if I needs bits for hydro...I noticed you can't get individual seals for the unit, they make you by a kit....
As you said all about profit..

It is a bugger when you have a mower that is worth the effort of repairing yet you have to shift heaven & earth to get the parts
As previously mentioned I have found Mulligans to be head & shoulder above any one else for transmission pats.
Better still they have been totally honest with me which is a rare thing now days

bertsmobile1 said:

It is a bugger when you have a mower that is worth the effort of repairing yet you have to shift heaven & earth to get the parts
As previously mentioned I have found Mulligans to be head & shoulder above any one else for transmission pats.
Better still they have been totally honest with me which is a rare thing now days

Click to expand...

Good to know...thanks for the info

Rear trans disassembled, found the thrust bearing on the output drive hydraulic motor near the brake disc end, bearing cage had failed ( see pic) .
the metal fragments in the filter were from the cage, so far no other damage found , looks like the fragment got to the filter before they caused havoc.
As for why the noise was coming from front unit is a mystery, when rear unit had failed.

Local mower shop can get new bearing, but none in country till end of month….seems parts availability is crap here at present. Few other suppliers same issue….China is not producing The goods anymore probably.