Position the puller with the rope incident angle less than 35 degrees from the first sheave or stringing block. Always keep the
trailer attached to the towing vehicle or tied down to an immovable object when pulls are expected to reach 1000 lbs or when
surface conditions will not allow outriggers to seat firmly into the ground. When attached to the towing vehicle set the emer-
gency brake and chock the wheels. Set the rear outriggers to their lowest level, then raise the front jack to "seat" the outriggers
firmly in the ground. Set the chocks at each rear wheel in the direction of the pull. Engage the over center trailer brake actuator
located at the right side of the trailer.
Hydraulic Power Source and Controls
The controls for all of pulling and power source controls are located at the console at the right side of the trailer. Refer
to the power source section below prior to starting for operation instructions.
Pulling Unit
Your puller is equipped with a hydraulically activated platform which can be raised or lowered to pull rope at angles
between -15 and 30 degrees. A full feathering directional control valve for this function is located at the operator controls.
The levelwind is completely automatic and features a self-regulating slip brake to control cassette winding tension. This
tension is adjustable via an adjustment nut accessible when the platform is fully elevated.
The capstan control is adjacent to platform raise-lower valve. When the capstan control valve is in neutral, any line ten-
sion present will activate the internal capstan brake mechanism. This brake is automatically de-activated by solenoid when the
directional control valve enters the "take-up" mode. If the brake has been activated, it will be necessary to move the directional
control valve slightly into the take-up position before attempting to pay out additional rope as described below. If rope will be left
unattended and under tension for a significant time, make it a practice to secure the rope with a catch-off.
To start the pull, feather the directional control valve to the take-up position. To stop the pull, return the valve handle to
the detented center position. To payout rope, feather the directional control valve into the take-up position momentarily to re-
lease the automatic brake. Then, activate (pull) the reversing protection plunger and move the valve to the payout position.
When payout operations are complete, allowing the plunger to return to its normal position activates the automatic brake.
Operation & Maintenance Manual
Model 1570-B Puller
09/2010
Page 6
ATR = (SL * SL * WT) / (8 * SG)
SB:
Number Stringing Blocks
APR = ATR / (.98**SB)
WT:
Wire Weight per Foot
AFR = TR * DD / 2
SL:
Span Length in Feet
SG: Sag in Feet
ATR: Absolute Tension Required
DD: Drum Diameter of Wire Reel in Feet
APR: Absolute Pull Required
AFR: Absolute Ft-Lbs Required
Note: Add 30% or multiply above results by 1.3 to obtain operating range
