Allied Construction Products, LLC www.alliedcp.com
TM577696_HP400B_16aug
24
12.0 Technical Information – [cont’d]
Fig. 12-2 [IN] & [OUT] *Motor Viewed From Shaft End
12.6 Motor and Valve Combination
IMPORTANT
The volume of oil flow affects the speed of the motor.
Over-speeding can lead to early bearing failure. Poor
performance will result from under-speeding. For the
best efficiency, select the motor carefully and always
confirm compatibility of motor and carrier. For a list of
available motor options, refer to the General
Specifications Table.
The motor is combined with a controller. This multi-
function control valve helps optimize operation with
improved reliability of critical components such as the
motor and bearings.
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 bearings from
damage by limiting the oil flow and preventing the
hydraulic motor from over-speeding.
2.
Pressure control
– Protects the 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 Control Valve - Markings Identified (View of
P1 & T2 Side)
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 Hydraulic Connections Identified
Supply hose tagged with Pressure Line ID Tag
Supply hose connection to valve port [P1]
Return hose connection to valve port [T2]
IN
OUT