2638 HST TOO SENSITIVE ie WHIP LASH IN REVERSE

[Mickeybob]

Hi all...i have a 2638 cab with loader with the problem is the HST is too sensitive ..when going backward when you lift off the pedal it is like you jam on the brake .Wow like whip lash bad .No gentle roll back, foward is not as bad ..dealer don't know why or have any answers .Is there an adjustment or something .? please anyone ?..mike

 

[duffer]

IIRC, both peddles of the HST have springs on them. I've never looked at mine for adjustability, but you might want to investigate under the cab floor. Worse case, you get a couple of different springs with less tension. or adjust the mounting location of the springs to the pedal shafts.

I know that mine "loosened up" with time. Not sure how new yours is, but after a year or so, my HST is not quite as sensitive as it was when it was new. But I rarely have to use the brakes on mine. It still stops pretty quick.

 

[Mickeybob]

11 hours on it ....when you let up on the pedal its like you hit hit something it stops so fast .Scared you could break of teeth off gears ....the unit is 2019 ....

 

[duffer]

With only 11 hours on it, I suspect you're still figuring out quite a few things, and getting used to it.

Try "feathering" out the pressure from your foot on the peddle, rather than just lifting it off. I don't think HST's were made to "coast" or "run-out" in either forward or reverse, when foot pressure is released.

 

[Mickeybob]

I have done that... but it still grabs hard . I mean even when you let off slowly .the other HST's they have are not like that .

 

[duffer]

When you had it back in the shop, did the dealer check the pressure on the hydraulic system? Obviously, something isn't right, so I'd keep on top of the dealer until they figure it out.

 

[Engineer42]

Does the 2638 have a detent adjustment switch on it? The 2555 has a rocker switch to the left of the steering column. 3 position. If so, if it's set on #1, try 2 or 3.

 

[s219]

There should be a damper on the HST pedals to prevent exactly this problem. Take a look to make sure it's there and working.

 

[Mickeybob]

Its like it needs an old carb dash pot on it.

 

[Mickeybob]

Changed my mind on the Mahindra ...went with a tym t494 hst cab .............much better .....