Toro Workman 3000 Series Service Manual page 333

Over Center Preload Adjustment
Side cover
1. Turn pitman shaft adjuster screw counterclockwise
until fully extended, then reverse 1/2 turn clockwise.
Stub shaft
2. Rotate stub shaft from stop to stop and count number
of turns.
3. Starting at either stop, turn stub shaft halfway back.
When gear is centered, flat on stub shaft will face up­
ward and be parallel with side cover (Fig. 45).
Figure 46
4. Put torque wrench on stub shaft and rotate 45� each
side of center. Record highest drag torque measured on
or near center.
5. Adjust over–center drag torque by loosening adjuster
screw jam nut and turning pitman shaft adjuster screw
clockwise until correct drag torque is obtained.
6. On new steering gears, add 6 – 10 in–lb (7 – 12
2
kgcm ) torque to previously measured worm bearing
preload torque. Do not exceed a total steering gear pre ­
2
load of 18 in–lb (21 kgcm ).
2
7. On used steering gears, add 4 – 5 in–lb (5 – 6 kgcm )
torque to previously measured worm bearing preload
torque. Do not exceed a total steering gear preload of 14
2
in–lb (16 kgcm ).
8. Install and tighten adjuster screw jam nut.
Workman 3000 Series Page 7 – 31 Rev. D Steering, Brakes and Supension