HST clutch purpose

[TonyF]

Why a clutch on a hydrostatic trans? I have an older BX with HST and no clutch, and a newly acquired B21 with HST with a clutch, whats the real purpose or usefulness behind the clutch on an HST, besides the obvious?
thanks,

 

[gwdixon]

I believe the clutch is necessary to change gears. The BX only has one gear.

 

[kevinj]

Why a clutch on a hydrostatic trans? I have an older BX with HST and no clutch, and a newly acquired B21 with HST with a clutch, whats the real purpose or usefulness behind the clutch on an HST, besides the obvious?
thanks,

The B needs the clutch for the PTO also

 

[Texas Fella]

Look and feel. When people by a "real" tractor, they want a clutch pedal. There are several smaller tractor models that really do not need a clutch on them.

 

[DiezNutz]

The B needs the clutch for the PTO also

Exactly, and really for no other reason. B21 has a live PTO.

Look and feel. When people by a "real" tractor, they want a clutch pedal.

Nice try, but no.

 

[beppington]

If all else fails ... push in the clutch! (and hit the brakes)

 

[TripleR]

Why a clutch on a hydrostatic trans? I have an older BX with HST and no clutch, and a newly acquired B21 with HST with a clutch, whats the real purpose or usefulness behind the clutch on an HST, besides the obvious?
thanks,

I honestly don't know, but that is the only thing I don't like about my L5030 and the only thing I consistently use it for is to start.

 

[Larry Caldwell]

I use the clutch to pick up the load on a PTO implement. The hydro clutch is pretty abrupt, and can put a lot of strain on the drive line and gears. I also use it as an emergency disconnect when I get into a situation I didn't anticipate. My HST pedal is perfectly centered, so I don't have to use a clutch to change gears, but not all HST pedals are that well adjusted.

The clutch also disconnects the wobble pump, and makes starting easier. The hydraulic pumps stay live, though.

 

[firefighter jim]

My Kubota B7800 has a hydrostatic transmission but also has a clutch. This is needed to engage (or disengage) either the mid or rear pto.

 

[Dr. Bob]

Yep, PTO engagement and disengagement.
On my B7800 HST I find it useful to change ranges on the transmission and engage and disengage FWD.