Toro 20330 Service Manual - Page 91

C. Control hook

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BBC / BOS / BCS When the control bar is cocked to its lowest position as in Figure 151. The buckling spring is flexed and moved to the right end of the rocker arm slot. Another event takes place inside the rocker arm: The spring-loaded control hook slides over the cable lever and grasps it so that when the lever is raised, the BBC cable will come with it. When the control bar is raised to a point 5" (12.7cm) below the handle, the BBC cable has been tightened enough to engage the blade (Fig. 152). A A B B C A. Rocker arm B. BBC cable lever Fig 151 3428-0286 C. Control hook A. Leaf spring Fig 152 3428-0289 B. Control hook Raising the control bar straightens the buckling spring. Also important is the function of the leaf spring. As the control bar is raised, the left tip of the control hook slips by the leaf spring without causing release of the cable lever. Continuing to raise the control bar causes the traction lever to move and the traction cable engages the transmission. WPM Drive Systems Manual 6-5

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6-5
WPM Drive Systems Manual
BBC / BOS / BCS
When the control bar is cocked to its lowest position as
in Figure 151. The buckling spring is flexed and moved
to the right end of the rocker arm slot. Another event
takes place inside the rocker arm: The spring-loaded
control hook slides over the cable lever and grasps it so
that when the lever is raised, the BBC cable will come
with it.
Fig 151
3428-0286
Raising the control bar straightens the buckling spring.
Also important is the function of the leaf spring. As the
control bar is raised, the left tip of the control hook slips
by the leaf spring without causing release of the cable
lever.
Continuing to raise the control bar causes the traction
lever to move and the traction cable engages the
transmission.
Fig 152
3428-0289
When the control bar is raised to a point 5” (12.7cm)
below the handle, the BBC cable has been tightened
enough to engage the blade (Fig. 152).
A. Rocker arm
C. Control hook
B. BBC cable lever
A. Leaf spring
B. Control hook
A
B
C
A
B