Question about Husqvarna LGT2654 54 inch 26 HP Kohler Garden Tractor 2013

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Been sitting in shed for winter. Cranked it yesterday ran fine but wouldn't go forward or reverse. It drove great when I parked it. Please help.

Has tuff torq k46bn transmission

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  • Richard Roberson
    Richard Roberson Jun 24, 2015

    I believe I know what happened. I drove in the shed in the fall. When I cranked it this spring it wouldn't move. You have to depress clutch-brake to crank and let'stension off pulleys. TThat's when the drive belt came off. Since it was that loose I put on a new belt and new blades since the deck was off too. Mows wonderful now. Thanks everybody.



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First make sure the transmission neutral lever released and pushed in.

If still doesn't move check the drive belt.

Posted on Apr 04, 2015

  • Richard Roberson
    Richard Roberson Apr 06, 2015

    I found the problem after I removed the very heavy mowing deck. The drive belt came off pulley about midway under the tractor. Thanks for the suggestions. So glad it was not the tranny.



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1 Answer

What weight hydrostatic oil is recommend for tuff torq k46, and quanity

Try this site. Lots of info and pix. Site says 5w-50 synthetic oil.
1.85 liters

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Diagram for hydrostatic drive

Need Make/Model/Year/Engine Model/Transmission Model/Deck Size, and hours on meter if you have one.A short description of the events preceding the beginning of the problem is also helpful.


The Huskvarna YTH150 uses Hydrogear transmission 319-0650, drive model 150071. One place to find parts and diagrams for most Huskvarnas is here:

MTDs use Hydrogear trannys also. Go to the site and enter 618-0319 in the search box. It will bring up a selection of MTD transmissions.

Sears Craftsmen mowers also have trannys from Hydro-Gear.

The best lawn tractor Hydrostatic Transmission Fluid isactually 10W-50 synthetic motor oil (like Mobil 1). Do not use hydraulic fluid or transmission fluid.

Hydro static transmissions on most lawn tractors are very similar. Most of them are made by one or two manufacturers. Tuff Torq makes a lot of them, but not the Huskvarnas. They do make all the John Deere lawn tractor hydro drives. The lawn tractor manufacturers (like JD) often say they are sealed and not serviceable. That is flat out, an untruth. All of the JD hydros, and most all others, are serviceable. A complete line of rebuild/replacement parts can be found at Tuff Torq. Info and instructions can be found there. They have a lot of good general info for anyone rebuilding their tranny.

Additionally, I have found that the mower manufacturers fill them (or spec them) with motor oil, 10W-30W. In the service manual, and at the hydro manufacturer, you are told if your tractor is used in extreme or heavy duty situations it's best to drain the oil and replace it with 10W-50 synthetic motor oil (like Mobil 1™). Truth is the tranny should have this oil from the get go. It will give you more power and extend the life of the tranny. The mower manufacturers are all just being cheap. They figure why not, you're the one who has to pay for the early failure. Oh yeah, one other minor detail, the tranny manufacturer also recommends regular oil changes, like every 100 hours.

Virtually all of these trannys have a black drain plug on the top, if they do not have the add on reservoir. You have to remove the tranny from the mower (not a difficult things to do, it takes about 30 min). Pull that black plug (I used a 1" putty knife to pry mine out) and turn the tranny upside down for about 30 min to completely drain. Most hold about 2 quarts. Flip it back, right side up, and refill. Install plug and reinstall tranny. Note: under the plug there is often a magnet which collects metal shavings. Lift this magnet out while you have the plug out; clean it and replace it. It may fall out while the tranny is upside down.If anything else falls out, you have a broken tranny and will have to take it apart.

When you refill the fluid just keep filling till it comes up within a quarter inch of the plug. You may have to go through a bleed process after reinstalling the tranny. The tuff torq site explains the bleed process.
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Depends if your has an external expansion or not. Normally you do don't need to check these transaxles as they are considered sealed units but if you wish to do so the following is the two documents from Tuff Torq on how do it.

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Info on repairing transmission, install belts

This transmission will be a Tuff Torq K46 series. You will need to look along the transmission's drive axle housing to get the model number. From there you can look-up the parts at Tuff Torq website under their catalog page. There is no service manuals that I know of but I did find a discussion on about repairing the K46 that has pics. See links below:

Tuff Torq Parts Look-ups
Tuff Torq K46 Repair Guide with Pictures

As belt installation will have the IPL for the mower.

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How does a hydro static transmission work

The Hydro-Static transmission is a hydraulic pump. I have added a link for Tuff Torq. They have videos showing how this type of transaxle works. Very cool video.

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Tuff torq k51 Hey, check out the manufacturers trouble shooting chart. This is a hydrostatic not a geared transmission right?

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Go to e-bay. Had one for $199

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Husqvarna transmission uses what type of oil

There are two different units used on there garden tractors, Hydro gear which uses a sae 20-50 motor oil, or a Tuff Torq unit that uses a sae 10-40 motor oil, they do not use hydraulic oil.

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