Fluid Level Low; Hand Pump Does Not Function; Rope Gripper " Lubrication; Wire Rope Lubrication - HOLLISTER-WHITNEY Rope Gripper 620 Installation, Maintenance & Troubleshooting Manual

Pumping unit
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3. Turn pumping unit OFF and place valve stem in the MANUAL position. Using hand pump,
pump cylinder down just enough to relieve pressure on security screw. Remove security
screws.
4. Return valve stem to the AUTOMATIC position. The rotating shaft will go entirely up the
cam. At this time, with the rotating shaft at the top of the cam, remove the hydraulic hose
from the cylinder.
5. Remove 3 angle bolts from both sides of mounting angle, leaving mounting angles attached
to floor (Gripper Mounting Channels).
6. Place "ROPE GRIPPER
and remove shaft from gripper.
7. Locate the block holding the cylinder stem to the rotating shaft tube. Using a long 5/32" Ball
Nose Allen Wrench, remove (4) 10-32 screws from block. Remove block from cylinder.
8. Put block on new cylinder. Re-install cylinder by installing shaft first, then block and
screws. Install hose on cylinder. Restore "ROPE GRIPPER
9. With valve stem at MANUAL, bleed air out of system per above "AIR IN LINE" section
until no air is evident.
10. Turn pumping unit ON. Hand pump cylinder down until pump motor takes over pumping.
With rotating shaft down and trigger latched, install security set screws.
11. Re-assemble moveable shoe, arms, and snap rings to "ROPE GRIPPER
remove security set screws, turn valve to AUTOMATIC and place gripper back into
operation.
➢ Situation 2: Cylinder will not pump down (or hold pressure)
1. Make sure "ROPE GRIPPER
brake is set.
2. Remove 5 angle bolts from both mounting angles and set mounting angles aside.
3. Locate the shaft holding the cylinder and remove shaft from "ROPE GRIPPER
4. With valve stem on MANUAL, follow instructions 7., 8. and 9. above.
5. Return valve stem to AUTOMATIC and turn pumping unit ON. Gripper will return to
loaded or open position.
FLUID LEVEL LOW – Gripper pumps partially down, pump continues to run
With the "ROPE GRIPPER
Level Window on the Oil Reservoir. Use SHC524 Mobil 1 Synthetic Hydraulic Oil or
Mobil 1 Fully Synthetic ATF (Automatic Transmission Fluid) to top off oil level.
HAND PUMP DOES NOT FUNCTION (AIR LOCK) GRIPPER WILL NOT PUMP
OPEN MANUALLY
Check oil level and top off as necessary.
Disconnect the Hydraulic hose from the gripper at the Quick-connect coupling.
Put Dump Valve in manual position and lower the hand pump handle.
Run pumping unit electrically. The hand pump handle should rise. This should prime the
hand pump and force fluid into the system, allowing proper use of the hand pump.
This procedure may need to be repeated a few times to effectively prime the pump system.
"ROPE GRIPPER
" LUBRICATION
®
Apply a thin layer of a general-purpose grease lubricant to the cam surface, the trigger and
latch mechanism, and the four movable shoe guides.

WIRE ROPE LUBRICATION

• Use a high friction lubricant such as: NYLUBE CABLE CARE #65 or AMERICAN OIL
VITALIFE #600. Care should be taken not to over lubricate
" on a suitable work surface. Locate the shaft holding the cylinder
®
" is gripping ropes, the pumping unit is OFF and machine
®
" in the loaded position, the level should fully cover the Oil
®
" to mounting angles.
®
". When complete,
®
".
®
BULLETIN 1144
Page 21 of 29
11/12/19

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