BIG SMILE

[naildriver]

This if I understand it right is a tach for a 4 speed tractor. ???? am I understanding this right?

[john.n]

no its not for a 4 speed. i have one on mine. only the first 4 gears are marked on the dial.

[naildriver]

no its not for a 4 speed. i have one on mine. only the first 4 gears are marked on the dial.

My dexta only has 3 foward gears, Am I missing something?

[commander]

My dexta only has 3 foward gears, Am I missing something?

Low range = 1- 3 forward + low reverse
High range = 4 - 6 forward + high reverse

I 'spect the tach's were only marked for the first four because those are the most used for field work. Not enough room on the face for 6 bands may have had some to do with it also.

[naildriver]

Yes, I was missing something, I should have thought about hi and low

[dexta roadless]

you must also remember that 3rd low is the fourth gear and the 1st high is the third

[Jos Cuypers]

naildriver,

rear PTO equipment (like a mower or a bush hogger) is always designed to operate best at about 530... 570 RPM (PTO input).
The gearbox however reduces the rpm from engine towards PTO. The above hourmeter is for a Dexta Diesel with serial number after 957E63953. This meter indicates : the engine making 1800 RPM, the PTO output is 540 RPM (see specification of the Dexta). The earlier build Dexta's have a slightly different reduction : PTO RPM of 536 at Engine 1 500 RPM.

Concerning the speeds

[naildriver]

Now that's very interesting, seems strange, I would assume that in low there was 1st, 2nd and 3rd and in hi,- 4th, 5th and 6th. Interesting, Thanks

[john.n]

when was the pto output speed changed? dont want to run any implements too fast.

many thanks

[Jos Cuypers]

After serial number 957E63953.