Wood’s Powr-Grip CB1 - Manual (Page 7)

Rev 1.0/6-13 5 CB1: #35168
Adjustment Procedure
Since the Counter-Balancer/Lifter unit tends to see-saw when it is loaded or unloaded, an
adjustable counterweight arm, control lines and ballast placed in a counterweight enclosure are
used to keep it level. In order to make the unit hang at a desirable angle for the application
(usually with Counter-Balancer nearly horizontal), some adjustment is normally required. Refer
to the charts in SUGGESTED CONDITIONS TO KEEP UNIT LEVEL. These charts show what must
be done to keep the Counter-Balancer/Lifter unit level when handling loads of various weights
(column A). These adjustments should work in most circumstances; however specific
applications may require different adjustments.
Reach Adjustment : The primary lift sling can be attached at various points along the Counter-
Balancer's main section using the primary lift sling shackle (see triangles #1-6 in OPERATING
FEATURES). This allows the operator to adjust the amount of "reach", or the unit's ability to
position materials under an overhanging obstacle. Chart 1 shows suggested conditions when the
lift sling is placed as far
forward (towards lifter) as possible, thus producing the shortest reach.
Chart 2 shows suggested conditions when the lift sling is placed as far back (away from lifter) as
possible, thus producing the longest reach. The attachment point for the lift sling should be kept
as far forward as the application will allow, since this reduces the amount of weight needed on
the control lines and ballast required for the counterweight.
Using Suggested Conditions Charts : Each chart lists the factors relevant to keeping the unit
level, including the position of the adjustable counterweight arm (columns B & C), the amount of
ballast material required in the counterweight enclosure (column D), and the amount of weight
needed on the control lines (columns E & F), which changes depending on whether or not the
load is attached to the Lifter (see OPERATION to follow). Based on the position of the primary
lift sling and the load weight, adjust the Counter-Balancer to provide level load positioning, as
indicated on the charts.
WARNING: Changes in the loading of the Counter-Balancer may cause sudden
changes in its orientation; caution is required when adjusting
counterweight ballast or adjusting counterweight arm position.
Counterweight Ballast Adjustment : Ballast for the counterweight is supplied by the user:
Suitable ballast materials include bricks, blocks of steel or lead, or any solid objects that will not
shift position or spill out of the enclosure. Place the appropriate amount of ballast in the
counterweight enclosure, as indicated in the charts. If the enclosure fills up before the required
weight is attained, a denser material is required. At no time should more than 700 lbs [317 kg]
be used as a counterweight. After adjusting the material, be sure to fasten the lid of the
counterweight enclosure securely.
Counterweight Arm Adjustment : To adjust the counterweight arm, remove the counterweight
arm locking bolt and slide the arm to the appropriate position (see triangles A-F in OPERATING
FEATURES). Align the holes in the counterweight arm with those in the main section. About 1"
[2.5 cm] of the red warning band should be visible when the counterweight arm is at its most
extended position. Be sure to reinstall the counterweight arm locking bolt, to secure the
counterweight arm in place.
After adjusting the Counter-Balancer as directed, attach the P2 Channel Lifter to the load (see
lifter's instruction manual) and raise the load a minimal distance, to observe the Counter-
Balancer’s reactions. At the same time, make sure that the appropriate weight is applied to the
control lines. After confirming that the Counter-Balancer is adjusted correctly, proceed to the