Allied Construction Products, LLC. www.alliedcp.com
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TM103337_HP1600_18feb
12.0 Technical Information – [cont’d]
12.4.2 Motor and Valve Combination
IMPORTANT
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 paired with a multi-function control valve
to help optimize operation with improved reliability of
critical components such as the motor and bearings.
12.4.3 Control Valve Function
The four functions of the valve 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 unrestricted, free flowing, and 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.
12.4.4 Control Valve – Adjustments
IMPORTANT
The valve is factory pre-set and requires no further
adjustments.
12.4.5 Control Valve – Part Number & Port
Connections Identification
Refer to Figure 12-3. The part number of the control
valve is stamped above connection port T2.
Fig. 12-3 Control Valve – Part Number Location
XXXXXX Above Port T2 Identified
There are four (4) port connections located on the
valve. Each port is stamped for identification. Refer to
Fig. 12-4. The valve and motor ports are identified.
The supply hose is also tagged [PRESSURE].
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 Motor, Valve & Hose Connections Identified
IMPORTANT
The Ho-Pac will not operate if the supply and return
hoses are crossed.
Pressurizing the outlet port of
the motor will result in damage. Verify
connections before pressurizing the hydraulic
circuit.