bobcat 310 two speed

[wirach]

hi! I'm looking for any information about how the two speed controller in bobcat 310 is working, I've a problem with high rang (both electric clutches are OK - resistances is 2.9 ohm and they are engaging when DC is added) questions are: - the switch in left handling bar was broken so I fixed it - should it stay down after one press on it or go back up? ( until my tamper in switch bobcat was working on low range OK) - after fixing switch bobcat lost low rage ( no transmission and no lifting bucket) and when I'm pressing switch bobcat is going forward even when bars are in neutral position - should I make a regulation of sering bars ? thank for any help Kamil

 

[Hotrod1830]

The high and low speed clutches are controlled by a standard 5 pin 30 amp relay. Low side clutch is wired to terminal 87a, high speed is wired to 87. Supply switched/fused power to pins 30 and 86, and ground pin 85 with 2 speed switch on handle to engage high speed. It is a momentary switch. You have to hold it down.
Make sure each clutch is free to rotate independently. When I got mine, the low speed clutch was welded together.

 

[wirach]

The high and low speed clutches are controlled by a standard 5 pin 30 amp relay. Low side clutch is wired to terminal 87a, high speed is wired to 87. Supply switched/fused power to pins 30 and 86, and ground pin 85 with 2 speed switch on handle to engage high speed. It is a momentary switch. You have to hold it down.
Make sure each clutch is free to rotate independently. When I got mine, the low speed clutch was welded together.

Hotrod1830, thanks a lot - now I know that the switch is OK , I'll check tomorrow both clutches .

 

[wirach]

Hotrod1830, thanks a lot - now I know that the switch is OK , I'll check tomorrow both clutches .

https://www.youtube.com/watch?v=cpcgzeYxYAM it'is OK that two wheels are turning together?

 

[wirach]

https://www.youtube.com/watch?v=cpcgzeYxYAM it'is OK that two wheels are turning together?

https://youtu.be/v6Wj72Dxp_g

 

[Hotrod1830]

https://youtu.be/v6Wj72Dxp_g

Yes, the two pulleys will always be turning. The pulley that goes into the chaincase is a common shaft and both pulleys on it turn together. Therefore, both belts are always turning.
The two speed change occurs when one clutch is engaged, and the other is disengaged. The engaged clutch drives the belt, and the other pulley is free to spin freely since it is disengaged. Only one clutch should be engaged at once.
This is why they are wired to a 5 pin relay. pin 87a is engaged "At rest", and 87 is engaged when the relay is actuated.

 

[Hotrod1830]

Yes, the two pulleys will always be turning. The pulley that goes into the chaincase is a common shaft and both pulleys on it turn together. Therefore, both belts are always turning.
The two speed change occurs when one clutch is engaged, and the other is disengaged. The engaged clutch drives the belt, and the other pulley is free to spin freely since it is disengaged. Only one clutch should be engaged at once.
This is why they are wired to a 5 pin relay. pin 87a is engaged "At rest", and 87 is engaged when the relay is actuated.

If the machine moves even with the bars in the neutral position, check the clutch adjustments.

 

[Hotrod1830]

If the machine moves even with the bars in the neutral position, check the clutch adjustments.

That would be the main drive clutch's in the chain case.

 

[wirach]

That would be the main drive clutch's in the chain case.

Hotrod1830 how can I check that clutches are free to rotate independently?

 

[Hotrod1830]

Hotrod1830 how can I check that clutches are free to rotate independently?

Loosen the drive belts enough so that you can turn the pulleys. With the key OFF, both V-belt pulleys should be free to rotate. With the key ON, the low side should be engaged, and the crank should turn when you turn the low side(outermost pulley). The high side clutch should be free to turn at this point.
With the 2 speed switch pushed, the high speed clutch should engage(innermost pulley) and should turn the crank when you turn it. The Low side clutch should be free at this point.