Harrington Hoists and Cranes RHN - Rhino Wire Rope Hoist - Manual (Page 31)

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S4 ↓ ↓ location and the switch on the geared limit is no long activated. The hoist high speed function is
now enabled and will function if high speed if desired by the operator.
S2
↓ (Lower Geared Limit): When the S2 ↓ switch position is activated, hook travel is disabled in the
down direction. The hoist can still be operated in the up direction
Figure 3-17 Geared Limit Up Direction Figure 3-18 Geared Limit Down Direction
Figure 3-19 Block Operated Limit Switch
Figure 3-20 Guide to Anchor Block Dimension
3.8.3 Testing the upper and lower limit switch, S3 ↑ (Upper Geared Limit) and S2↓ (Lower Geared Limit).
1) Test at high and low speed without load.
2) Activate the “up” button on the control pendant carefully, observing the hoisting motion, until
the S3 ↑ upper geared limit switch disables hook motion in the up direction.