OTTO Thumbwheel Switch
I am hoping someone here can help me out. I have a Case 440-3 skid with a thumbwheel switch on the right joystick that is going bad. The thumbwheel controls the hydraulic in/out and flow of hydraulic attachments. These switches are in many different model skids, not just 440-3.
If someone can measure the switch voltage at idle, then at each extreme of the wheel. Idle should measure 2.5V. Extremes will either measure 4.5v and 0.5v or they will measure 4v and 1v.
Three wires. Black is ground. Red is input. Yellow is output. So you would measure black and yellow while moving the switch.
Thumbwheel is marked OTTO Controls. HTW series switch with detent at both ends with spring return to center. Case/New Holland part number 87668736 which Case NH sells for about $330. OTTO sells these same switches for about $100. OTTO not helpful finding solution.
I have narrowed down the equivalent OTTO switch. The information needed is the second number after HTW. I know the OTTO part number starts HTW-2X, where X is either A,D,J, or M. J and M are identical to A and D except with “tighter tolerance”.
I am sure there are tons of other people that would benefit from this information. Thank you in advance!