TECH TIP 11 | RELEASED 02.28.2022 | VERSION 1.0
STEP 6: Setting Hydraulic Motor Force (stall)
Ensure brake line is reconnected from Step 5. Using the lower control, rotate away from the fixed
anchor until the rotation stalls. Adjust relief cartridges, R1 and R2, in the rotation slip drive hydraulic
manifold, until the proper load cell reading is achieved as stated in the Hydraulic motor force (stall)
value or the quick reference section of the Maintenance manual. One relief valve adjusts clockwise
rotation while the other adjusts counterclockwise.
STEP 7: Slip Drive Adjustment
Using the winch up function, pull up slowly creating a side-load on the boom. The rotation should
slip at the values stated in the maintenance manual, do not exceed 2500 lbs. Adjust the slip value
up or down by adjusting the sequence cartridges, S1 and S2 or PS1 and PS2 in the rotation slip
drive hydraulic manifold. One sequence valve adjusts clockwise rotation while the other adjusts
counterclockwise.
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