PRODEM PHC 050 Operation And Maintenance Manual page 14

Setting and Adjusting Relief Valve (※ ※ ※ ※ )
For the compactor with 'N' type valve, a relief valve must be installed to compactor piping, and must be
adjusted to the specified maximum operating pressure ot the compactor.
For the compactor with 'P' type valve, you do not need to install a relief valve to compactor piping. If a
relief valve has already been installed for other attachment, such as breaker, you do not also need to re-
adjust the setting pressure according to the compactor's operating pressure.
Please consult PRODEM or our dealer for more detail about the compactor piping.
Piping should be placed as follows when the compactor is viewed from the operator in carrier's cab:
P Line (IN) : Left
T Line (OUT) : Right
When 'P' and 'T' lines are reversed with each other, the compactor does not work or rotate very slowly by
means of the reverse-flow-bypass check valve of the motor control valve to protect the hydraulic motor.
So, make it sure that piping is installed in right direction.
When you newly install piping, make it sure that there is no foreign substance inside piping sub-parts
such as hoses, pipes, valves and fittings. After finishing installation of piping, connect 'P' and 'T' line
directly to each other without connecting the compactor and do flushing process during minimum 5
minute to make hydraulic oil clean before connecting the hoses to the compactor.
Be sure to use piping parts that conform to the hydraulic specification of the compactor and carrier. When
using the compactor with the piping modified for other purpose or modified with parts whose configuration
has not been confirmed, be sure to consult our service or dealer. Remember that problems resulting from
wrong piping or wrong installation are not covered by our warranty.
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