OPERATION
PHDHF / PHDHC 03/20
Operation Section 4-7
© 2020 Alamo Group Inc.
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Do not operate the unit under any circumstance if the slope is 10 degrees or greater.
Operate this Equipment only with a Power Unit equipped with an
approved operator Roll-Over Protective Structure (ROPS). Always
wear seat belts. Serious injury or even death could result from falling
off the Power Unit--particularly during a turnover when the operator
could be pinned under the Operator Protective Structure.
(SPU-14)
3.2 Power Unit Safety Devices
If transporting or operating the power unit and implement near a public roadway, the power unit must be
equipped with proper warning lighting and a Slow Moving Vehicle (SMV) emblem which are clearly visible
from the rear of the unit. Lights and an SMV emblem must be equipped directly on implements if the visibility
of the tractor warning signals are obscured.
Maintain all manufacturer equipped safety shields and guards. Always replace shields and guards that were
removed for access to connect, service, or repair the power unit or implement.
OPS-UPI- 0004
3.3 Auxiliary Hydraulics
The power unit must be equipped with auxiliary hydraulics and be rated for the hydraulic flow rating of the
digger model being used. Reference the power unit operator’s manual to determine the hydraulic output
specifications of the power unit.
Common hydraulic connection points for most power units are given below. Consult an authorized dealer if
there are any questions on where to tap into the hydraulic system for your equipment.
Skid Steer Loaders
-Boom auxiliary outlets
Backhoes
-Auxiliary hydraulic outlets or bucket curl cylinder circuit
Loader Buckets
-Auxiliary hydraulic outlets or bucket tilt (dump) cylinder circuit
NOTE:
Some auxiliary outlets on these power units are one way circuits and turn on flow abruptly with such
force that it can cause damage to hydraulic motors and other parts of the system and will not reverse the
motor to free the auger in instances where it becomes lodged. Check this before installing on one of the power
unit outlets.
Determine the length of hose required to plumb the drive unit into the power unit hydraulic outlets. Be sure
hydraulic hoses are long enough to perform at the full range of the digger’s operating capacity. The digger
hydraulic hose quick couplers must be compatible with the couplers of the power unit. Hydraulic hoses and
fittings must have a continuous operating pressure rating of at least 25% higher than the maximum pressure
of the hydraulic system that the digger will be tapped into.
OPS-PHD- 0001
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