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Pat Parry Posted on May 14, 2014

My Craftsman lawn tractor with 19 horse B & S Twin with hydrostatic transmission loses speed and power in forward and reverse as it warms up. Within 20 minutes reverse will be gone and forward mo

Motor runs fine. Transmission noticeably gets worse as it heats up.

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russ francis

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  • Contributor 32 Answers
  • Posted on May 17, 2014
russ francis
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More than likely your low on transmission fluid. I heard alot of this pertaining to hydrostatic transmissions on yards with inclines. I would check your fluid level .

4 Related Answers

Anonymous

  • 109 Answers
  • Posted on May 03, 2009

SOURCE: Hydrostatic Transmission Failure

There is a transmission bypass lever on the back of the mower, if the bypass is moved out of the drive position, it will not drive in either direction, and will be really easy to push.

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Anonymous

  • 95 Answers
  • Posted on Jul 30, 2009

SOURCE: We have a 1 yr old Craftsman 24 HP lawn tractor

It sounds like the brake plate is sticking on the transaxle,if you look on the right side of the transaxle a rod and spring run back from the front to a plate,under this plate are two 1/4 pins that actuate the brake pads on the disc,lubricate these pins with wd-40 and move the plate back and forth to see i this frees the problem up.

Anonymous

  • 1 Answer
  • Posted on Nov 30, 2009

SOURCE: Loss of drive in a Craftsman Lawn tractor

I also have a Craftsman tractor with the same problem. Sears repairman said it needed a new transmission and it would cost $1,400 to install. A new one is about $1,000. Anyway, if you remove the battery and the battery tray under the seat it will expose the transmission fill hole (hex). I opened the top and it looked empty. I had a bottle of 90 weight gear oil in my shop and filled the transmission to the top. I have not had any problems with it since. $4.00 bottle of oil verses a new tractor is worth a try.

philwalker78

Phil Walker

  • 610 Answers
  • Posted on Sep 08, 2011

SOURCE: I have a John Deere L120 tractor with a

Hi, your problem is caused by the transmission over heating. Remove the battery and battery carrier and clean all grass and debris from the hydro cooling fins and fan. Hope this is helpful, regards Phil.

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Model 917.203900 22 HP lawn tractor. Shifts consistently into forward but frequently won't shift into reverse. What's wrong?

  1. Craftsman Hydrostatic Transmission Fluid Change - YouTube

    ? 40:15
    www.youtube.com/watch?v=vd1EqFtTYgk

    May 10, 2012 - Uploaded by Smokeasammie
    I change the gear oil and hydrostatic transmission fluid on my Craftsman Lawn Tractor. Fluid per Peerless ...


tip

Riding Lawn Tractors with Hydrostatic Transmission Tip of the Year

Hello everyone! IF you have a riding mower or tractor with hydrostatic transmission you are going to love this insider's tip. Slightly overfill the transmission. Always keep the fluid level about 1/4 inch above the full line on the dipstick. Once you have done this you will instantly notice that the tractor has more speed in forward and reverse. You will also notice that it has more power when mowing up hill. Doing this solved several problems I was having with low power and also slow reverse. I had adjusted the linkage but it did not solve my problem, adding the additional transmission fluid did. Enjoy your more responsive tractor! Joe
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Hydrostatic transmission

They are not fast going back but they are strong. The belt is looseing tent ion bad belt.
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Linkage inside gear box does not engauge. Mechanics work to the bolt on top of the bottom gear (differential) box. Neither forward nor reverse work.

Most likely a hydrostatic transmission and most likely it is dead. Buy a new one or look around on google and craigslist for a used one. Maker and model number will be printed on top and possibly stamped on the bottom. New hydrostatic transmissions cost more than a new mower.
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Mower won't move in forward or reverse, it just makes a loud wining noise. I've had this happen before but I usually can get it moving.

If this is a hydrostatic drive. Check oil level in transmission. If you have been running it low on oil, it may be too late for the hydrostatic drive unit. If it has a drain plug, drain it and change the oil.
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How do I adjust the speed control handle

Well on my AYP manufactured tractor, which is much like yours but has the name Husqvarna on it, the hydrostatic transmission is shot and it exhibits much the same characteristic. That is no forward nor reverse movement until it gets nearly to the end of its range. The F/R lever on the right side is connected to a much smaller lever on the end of a shaft which goes into the transmission. What I would do is check the linkage to make sure that the range of travel on the speed control moves the smaller lever input into the transmission. If the range of travel is the same, you may need a new transmission, they are expensive. If there is some slop in the linkage, you may have another day in the sun. You can google "manual, craftsman, lawn tractor" and find some links to get a manual. What I did was find another lawn tractor as the cost of repair far exceeded the value of the old mower.
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Lawn tractor forward movement problem

Check the adjustment from the lever to the transaxle, if the linkage is ok the transaxle may be suffering from age and has leaking internal seals.
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Wont move forward or reverse-- transmission??

Does it have gears or a hydrostatic (automatic) transmission?

If it's a gear model, sounds like a loose drive belt.

If it's hydrostatic, it could be a belt problem or a problem inside the transmission. If it's a tranmission problem, this is not good. Many of the transmissions on riding lawn mowers are not serviceable - they are just replaced.
Oct 10, 2009 • Garden
2helpful
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Hydrostatic Transmission Failure

There is a transmission bypass lever on the back of the mower, if the bypass is moved out of the drive position, it will not drive in either direction, and will be really easy to push.
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NEW WHEELS AND BRAKE ADJUSTMENT MOWER WILL NOT MOVE IN ANY GEAR

Is it a hydrostatic drive and did you pull the pin that is located by the hitch. The pin should be pushed in in order to engage hydrostatic drive.
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