Instruction Manual

2
PTEC II
System Overview
The Series II Pressure Governor is a computer controlled throttle and pump interlock monitor-
ing system. The system uses a linear throttle actuator and a set of toggle switches to control
engine RPM. It will maintain a selected pump discharge pressure or engine speed in re-
sponse to the selected mode and desired operating parameter. Pressure sensing is done
with a 0-300 PSI transducer and RPM is monitored with a magnetic pick-up.
There are seven (7) major components:
ECU Microsentry Unit PN 108082
PSI Transducer PN 100581
Linear Actuator PN 101702
RPM Sensor PN 102902
Actuator Control Module PN 100328
Control Head PN 100478
Harness PN100454-D
In PSI Mode, the system monitors the pressure transducer and changes the actuator position
to maintain the set pressure. In essence, cruise control for the pump. In RPM Mode, the
system maintains a constant engine RPM regardless of varying torque loads or pressure.
Both modes are dependent on the capability of the engine to respond to changes.
The system has diagnostic capability through the Control Head Assembly and requires a
“diagnostic pigtail” for access. The system stores fault codes for key components and these
are also accessed through the Control Head.
Installation requirements are 12 Volt power with circuit protection and a safety interlock sys-
tem.