Allied Construction Products, LLC www.alliedcp.com
TM576981_HP700B_18feb
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12.0 Technical Information – [cont’d]
Fig. 12-2 [IN] & [OUT] *Motor Viewed From Shaft End
12.6 Motor and Valve Combination
IMPORTANT
Incorrect motor and valve combination will result in
poor performance or damage. Always identify which
motor and valve package option is installed if Ho-Pac
is moved to a different carrier or anytime the motor or
valve is replaced.
The Ho-Pac comes standard equipped with a multi-
function control valve. Benefits of this valve include
optimized operation and improved reliability of critical
components such as the motor and bearings.
There are four (4) motor options available. For each
motor there is a corresponding control valve.
12.7 Control Valve – Adjustments, Function,
Identification & Port Connections
12.7.1 Control Valve – Adjustments
IMPORTANT
The valve is factory pre-set and requires no further
adjustments.
12.7.2 Control Valve – Function & Benefit
The four functions are:
1.
Flow regulator
– Protects the hydraulic motor
from over-speeding by limiting the oil flow.
2.
Pressure control
– Protects the motor and other
hydraulic components from over-pressure. This is
factory pre-set at the maximum operating
pressure plus 200 psi (14 bar).
3.
Anti-cavitation circuit
- Controls deceleration of
the hydraulic motor and eccentric mass. Also
protects motor from damage on circuits not set
up with an open return.
4.
Return line check valve
- Prevents reverse flow
to the hydraulic motor. Also provides a nominal
back-pressure to ensure the proper operation of
priority flow control valves, such as Allied’s AC40
and AC75.
12.7.3 Control Valve – Part Number Identification
& Port Connections
The part number of the control valve is stamped on
the manifold and just above the T2 port.
IMPORTANT
For ease of identification, the valve body is
stamped with the part number and the ports are
stamped P1, P2, T1 and T2.
Fig. 12-3 View of P1 & T2 Side of Flow Valve
Identification Markings
XXXXXX:
Marks Area Stamped with Part Number
P1
: Incoming supply oil flow from carrier.
P2
: Regulated oil flow to motor’s [IN] port.
T1
: Return oil flow from motor’s [OUT] port.
T2
: Return oil flow to the carrier (Tank).
Fig. 12-4 Hose Connections
Supply hose tagged with Pressure Line ID Tag
Supply hose connection to valve port [P1]
Return hose connection to valve port [T2]
IN
OUT