HOLLISTER-WHITNEY Rope Gripper 620 Installation, Maintenance & Troubleshooting Manual page 8

Pumping unit
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ring on female fitting. Release ring to secure the fittings together.
Wiring from the gripper to pump unit is color coded per Chart 2.
Connect terminals RG1 and RG2 to controller power, RG5 and RG7 to
safety circuit; check control diagram for proper elevator control connection.
When wiring and hydraulic connections are complete, make sure valve stem
(dump valve) in pumping unit is set to AUTOMATIC. Turn pumping unit
test switch ON (see Figure 4). The gripper latch solenoid should energize
and push the trigger onto the latch. If it fails to do so, check control wiring.
When the solenoid is energized, loosen the two security set screws a turn or
two. If rotating shaft moves, turn valve stem to MANUAL and use hand
pump to move shaft back, or jump terminal RG3 to RG4 to temporarily
operate electric pump. Make sure the trigger has properly engaged the latch.
Remove security set screws. Once removed, store set screws in bottom of
pump unit. NOTE: Security set screws must be completely removed
when "ROPE GRIPPER
damage to the unit.
Unit is now ready for required lining wear-in and testing.
" activates to prevent gripper failing to set or
®
White
RG2
Black
RG3
Red
RG4
Orange
RG5
Blue
RG6
Green
Ground
Pigtail to Pumping
Unit Wiring
CHART 2
FIGURE 4
BULLETIN 1144
Page 8 of 29
11/12/19

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