Troy bilt hydrostatic transmission problems

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Troy bilt hydrostatic transmission problems

Even though your Troy-Bilt riding lawnmower is a quality machine, you may still have occasional problems with it. It can be extremely frustrating to find that your mower won't start, or that it cuts off once you start mowing. Before you call a professional, or take it in for repair, there are a few steps you can take to troubleshoot your mower. Be sure to refer to your user manual for specific instructions and a diagram of your particular mower model. Check to make sure the cutting deck is disengaged, that your parking brake is set, and that the safety switch is not on.

Look at the battery to make sure it is installed properly and use a voltmeter to ensure that the battery is fully charged. Check the fuse box and all connections, and check to see if fuses are burnt out and need to be replaced. Also make sure the ground wire is intact; this is a black wire that goes from your engine to the frame of your mower. Make sure you have gasoline in your tank; also check to make sure the fuel line and fuel filter aren't clogged with dirt or debris. If you're unsure, replace your fuel filter.

Look to make sure the spark plug wire hasn't disconnected; replace the spark plug with another one. Inspect the blade to make sure it isn't bent. If so, this will cause the lawnmower to vibrate. JIm Cooper is an attorney and business consultant. He serves on the board of many corporations. He is also a published writer with more than 30 years of experience. Hunker may earn compensation through affiliate links in this story.

Troy Bilt transmission problems

Step 1 Check to make sure the cutting deck is disengaged, that your parking brake is set, and that the safety switch is not on. Step 2 Look at the battery to make sure it is installed properly and use a voltmeter to ensure that the battery is fully charged. Step 3 Check the fuse box and all connections, and check to see if fuses are burnt out and need to be replaced.

Step 1 Inspect the engine throttle choke and control to make sure it is positioned correctly. Step 2 Make sure you have gasoline in your tank; also check to make sure the fuel line and fuel filter aren't clogged with dirt or debris. Step 3 Look to make sure the spark plug wire hasn't disconnected; replace the spark plug with another one.

Step 1 Inspect the blade to make sure it isn't bent. Step 2 Check the belt that turns the blade to make sure it isn't damaged. Step 3 Tighten or replace the mounting bolt to the blade. Share this article. James Cooper. Show Comments.If we can't tunnel through the Earth, how do we know what's at its center?

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What causes a troy built lawn mower transmission to slip or not hold gear when going downhill? What evidence does Coutu use to support her claim that improvisation requires resilience. A lady introduce her husband's name with saying by which can stop or move train what is that name.

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troy bilt hydrostatic transmission problems

Wiki User I had the same problem with my yard man machine. It just started slipping one day going down hill and had been doing it ever since. Checked all Pulleys including variator, All good Opened rear end, all gears good Finally I adjusted the linkage from peddle to variator to tighten the front drive belt.

That changed things slippage went away and the machine pulls like new. But had to adjust it all the way out to handle the slippage.

I am planning to buy a belt from Tractor Supply by length and get it about an inch shorter to regain my adjustments. I believe the Front OEM belts are a bit too long for the mower as such the belt on the mower works great till it gets stretched and the machine begins to slip and continues after belt replacement. Hope this helps. No the can go faster downhill or uphill. Your brake might grab when going downhill because the pads are wearing out.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

It only takes a minute to sign up. I have a Troy Bilt horse that has 2 belts, one for the 2 blades on the deck and a drive belt that runs the hydrostatic transmission.

The transmission belt broke, and I can't figure out how to get to the rear portion of it that changes. I have linked to 2 pictures:.

The one with the fain in it is an overhead view below the battery and on top of the transmission on the back of the mower. I need to take the nut on top of the fan off to get the belt around the pully you can see the bracket that the pully sits "in" in the breakout. I have 2 problems:. How do I keep that from turning? I can turn the fan by hand if the brake is on or not, and if the transmission is engaged or not. There is a pull-out lever that disengages the transmission, but that pully always freely turns so when I get a wrench around it I cannot stop the shaft and everything from turning.

It's fairly typical for lawnmowers to have guards like part 57 which make it difficult but not impossible to get the belt on.

MTD Hydrostatic transmission issues

They're more concerned with making it difficult for the belt to come off. Though, this also helps keep it in place while you fiddle with the other end. You may need to strongarm it a bit, but try to bend them back to the original positions. If you really want to get the fan off, you need a crow-foot wrench and will probably need to hold the pulley with a strap wrench and work against that. Don't be surprised if it's a reverse thread.

The pulley will be splined to the shaft.

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I've recently seen a suggestion to hold the pulley by twisting the belt with a flat nail bar. Then put a short 2x4 between the nail bar and frame.

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OK, here's how I did it: I put the back on using Harper's method, a slotted screwdriver without taking any of that apart. For the front, there are 2 pulleys on a shaft coming out of the engine.

This needs to be removed by holding the shaft with a pipe wrench and taking the bolt off the bottom of the bottom pulley. The belt is a tight fit, and it's worth noting that if you put the brake on one of the small pulleys 75 in the diagram pivots and give you enough slack to fit the whole thing properly.

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So, my steps were:. On a Horse XP there is only one drive pulley. If you cant get the fan to clear the shaft; it does.According to the experts at Today's Mower, there are fives types of drive gear in common use on lawn care machinery: gear, friction disk, automatic, CVT, and hydrostatic. Hydrostatic drives are extremely easy to use when compared to geared versions; with the latter, the operator usually has to come to a complete stop and depress a clutch to change ratios, which becomes tiresome for people using such machines professionally.

Hydrostatic drives have no clutch and offer infinite speed variations. They even shift from forward to reverse with a simple change in pressure on one foot peddle. That said, there are a number of ways in which they can fail.

All five drive types have certain components in common, and the failure of any of these can result in the lawnmower not moving. Most manufacturers install a pressure-sensitive switch under the seat to interrupt the mower's self-propulsion when the seat is unoccupied; a defective switch can result in the drive not being engaged. A seized-on parking brake can either render the mower immobile or reduce its performance significantly. All drive types must be connected at some point to the motor, so there must be a cogged or splined power take-off; stripped cogs or splines will not transmit power to the drive.

How to Troubleshoot a Troy-Bilt Riding Lawnmower

Hydrostatic transmissions -- often referred to simply as hydros, hydro-drives or HSTs -- are constantly variable drives similar in operation to car automatic transmissions. They have a pump that effects hydraulic fluid inside a closed system, and reduction gearing that responds to changes in that hydraulic pressure.

Mechanical components also include a differential and a drive axle.

troy bilt hydrostatic transmission problems

Failure of any one of these components will prevent the lawnmower from moving. Hydraulic fluid is passed through either high-pressure rubber or metal hoses; a leak from the hoses or any of the other components will also stop the hydrostatic transmission from working.

By far, the most common reason for hydrostatic transmission failure is old hydraulic fluid. John Deere states that "Operating outside of the recommended oil air temperature range may cause premature hydrostatic transmission failure. This decay results in air and atmospheric moisture becoming blended into the oil, properly called entraining. Oil that is entrained has inferior hydraulic properties in comparison to fresh oil, resulting in less than optimal system function.

Entrained oil must be drained completely.

troy bilt hydrostatic transmission problems

After positioning the lawnmower to drain properly -- typically this means on a perfectly flat, level surface -- remove the drain plug and allow the machine to stand for several days until every last vestige of the old oil has dripped out.The hydrostatic transmission in your lawn tractor requires servicing that includes draining the old hydrostatic oil, changing the filter and adding new hydrostatic oil. Hydrostatic transmissions consist of a hydraulic pump and motor that is generally belt-driven from the lawn tractor engine to propel the lawn tractor forward and backward by a foot controlled pedal or hand lever.

The hydrostatic transmission oil fill reservoir is generally located under the lawn tractor seat, but some model lawn tractors have two transmission oil fill reservoirs. Park the lawn tractor on a flat, level working surface and allow the engine an transmission to fully cool before filling the transmission. Set the lawn tractor park brake to prevent the lawn tractor from shifting or rolling while working. Slide an oil-catch drain pan directly under the hydrostatic transmission oil drain plug to catch the old transmission oil.

The transmission oil drain plug is generally located on the side of the transmission towards the bottom. Some lawn tractor make and model hydrostatic transmissions may have one or more transmission oil drain plugs, one for the hydrostatic transmission side the other for the differential gear side.

Clean dirt and debris from around the hydrostatic transmission oil reservoir cap with a clean shop towel to prevent the hydrostatic transmission and the transmission oiling system from contamination. Some hydrostatic transmissions have more than one transmission oil reservoir located under the lawn tractor seat: one that fills the hydrostatic transmission side and the other fills the differential gear side.

Both the differential and hydrostatic transmission are connected by an internal cavity. Loosen the hydrostatic transmission oil reservoir cap by hand to allow the transmission oil to drain. A loose cap allows air to enter the oiling system, eliminating air vacuum and providing better oil flow drainage.

Unscrew the hydrostatic transmission oil drain plugs with a socket wrench, and allow the transmission oil to fully drain. Screw the transmission oil drain plugs into the transmission.

Torque the transmission oil drain plugs with a socket and torque wrench. Refer to your lawn tractor manufacturer's owner operator's manual for specific transmission oil drain plug torque specifications. Slide the transmission oil drain pan directly under the hydrostatic transmission oil filter. Some make and model hydrostatic transmissions are equipped with an transmission oil filter to clean the transmission oil, lengthening the transmission oil life.

Unscrew the hydrostatic transmission oil filter from the transmission oil filter housing with an oil filter wrench.

Slide the oil filter wrench onto the oil filter.Send questions for Cecil Adams to: cecil straightdope. Your direct line to thousands of the smartest, hippest people on the planet, plus a few total dipsticks.

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How to Troubleshoot a Troy-Bilt Riding Lawnmower

Default vbulletin 3 style made responsive also available in the pack. Purchase Our Style Pack Now. Remember Me? Straight Dope Message Board. FAQ Calendar. Troy Bilt Lawn Tractor hydrostatic transmission problems. Hello Everyone, Once again I am turning to the SD boards to see if anyone here can give me some insight to a problem. A little less than a year ago my wife and I purchased a Troy Bilt 46" Horse lawn tractor for our 5 acres.

This was the top of the line Troy Bilt and one of it's features was a hydrostatic transmission. Unfortunately, at least in our case, it has turned out to be it's weakness. After owning it for three months the transmission failed and had to be sent in to be repaired. We got it back and it has ran fine until today, when once again the tranny has failed in the same way.

The transmission is always engaged and to put it in neutral so you can push the tractor you have to pull a lever at the back of the transmission that dis-engages it. When you are done and want to re-engage the transmission, you take the lever and push it to activate it.

Well, here is were the problem happens. The event described is the same one that happened the first time. I put it in neutral, pushed the mower into the garage and performed maintainance that needed doing. Push the mower back out, push the lever to re-engage the transmission, start the mower and nothing.

The tractor will not move forward or reverse, instead the only thing that happens is that a whine sounds when trying to move the tranny lever into either forward or reverse.

Then, just to make it as annoying as possible, I try to put the mower into neutral again so I can put it back into the garage and it will not go into neutral. I can take my hand and follow the lever back to the transmission housing and confirm that it is moving a lever when it is being pulled or pushed the lever that moves the tranny in and out of neutral. The last time this happend I was told a valve inside the tranny broke and that caused the problem, so I have to assume that the same thing as happend.

The tractor comes with a 2 year factory warranty, so it will be covered under warranty, however it is MY responsiblity to transport the mower to the factory service center.

Well, easier said than done. How in the hell could I possible get it onto a truck or trailer? Last time I returned to Lowes and pitched a fit at the manager until he agreed to send a Lowes delivery truck out with a lift to retrieve the tractor and send it to the repair center.

That was after only owning it for a few months, I am not so sure that I can count on Lowes doing that again. But, that isn't my main question.

What I am trying to find out is if anyone here has a Troy Bilt tractor with a hydrostatic transmission and is familiar with this issue.

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What is causing it, how do I prevent it and is it possible to fix on my own? This has been a truly frustrating experience.

troy bilt hydrostatic transmission problems

I really wanted to purchase either a John Deer or Craftsman mower instead, but we decided to go with the Troy Bilt because it seemed a good value, price wise and feature wise.Explore other articles on this topic. Hydrostatic Transmission Fluid. What type of fluid should I use? Our company does not manufacture hydrostatic transmissions and they are not designed to be a consumer serviceable assembly.

They are filled with the specified pump fluid to match each pump design and then sealed by each manufacturer at their factories. Replacing hydrostatic fluid is normally not necessary, unless the drive system is in need of some other internal service or repair. Persons unfamiliar with servicing these hydrostatic systems are encouraged to use our Service Dealer and make arrangements to have these systems professionally serviced.

If you are unsure as to the manufacturer of the specific pump being serviced, it will be necessary for you to contact our Customer Support Department and our Technical Support Staff will be happy to research and identify what model and manufacturer hydrostatic drive system was originally used in a particular model and series of machine.

Call: Skip to Main Content TroyBilt. Search Close Search Toggle SideBar Home Home troybilt. Lawn Care. Clean Up. Toggle SideBar. Articles Hydrostatic Transmission Fluid Explore other articles on this topic.

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