Class1 Pump Throttle Electric Cotnrol User Manual
PTEC II
Pump Throttle Electronic Control
Series II
PTEC II PN 100509
For Mechanical Diesel Engines
1
PTEC II
System Overview
The Series II Pressure Governor is a computer controlled throttle and pump interlock monitoring 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 response 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 system.
2
PTEC II
Hardware
Electronic Control Unit (ECU)
Microprocessor control logic to operate the system. The ECU contains internal memory for
system setup and diagnostic information. Inputs and outputs at the ECU determine system
operation. The ECU should be mounted in an accessible area but protected as much as
possible from physical damage especially the wiring.
P.E.D. # 12034398
CONN:
TERM:
P.E.D. # 12047680
SOCKET
CONN:
TERM:
SOCKET
WIRE
1B DEC
MAGPU
2B
3B INC
1C
DIAGNOSTIC
1E
INTLK #1A
GOVMODE
2E
PPSI
2G
PSI GND
3J
ACT IN/ON3K
P.E.D. # 12040921
P.E.D. # 12047680
WIRE
ACTOUT
3A
GOV LT
2C
GROUND
3D
1F SYS ACTIVE
5V-OUT
3F2FMAGGND
Control Head
This unit contains the switches and LED’s for the user interface to the system. Diagnostics
and System Setup can be performed using the Control Head and a diagnostic connector.
This part of the system is the operator interface and should be mounted on the pump panel at
a height that allows easy operation and viewing.
UCE
-41DHhcstueD
P61-9
LANIMRETTEKCOSNOITCNUF
----------A YDAERSYS
rotcennoC
F1-2C
E1-1C
----------
E2-1C
B3-1C
B1-1C
C2-2C
D3-2C
BEVITCASYS
CA1#KLTNI
D1#KLTNI
EEDOMVOG
FCNI
GCED
HTLVOG
JDNUORG
lanimreT
-0640hcstueD
14161-202
3
PTEC II
Hardware (cont.)
Linear Actuator
This is a 12 VDC, 2 Amp nominal DC motor incorporating fast braking on direction change,
adjustable limits (max. 3 inch) and a high pull force (50 lbs). The resolution of the actuator
installation is perhaps the most critical of the system. The least RPM change with the greatest actuator movement possible works best.
The actuator should be mounted in an area that subjects it to least amount of vibration, heat
and water. The actuator body should be mounted higher than the linkage point to prevent
water intrusion through the cable.. It should NOT be mounted directly to the engine or engine
mounts or brackets.
ROTAUTCAROTCENNOC
TEKCOSNOITCNUF
A----------
B---------CDNUORG
DARIDTCA
EBRIDTCA
Vehicle Interface Box
The Actuator Interface Module connects to the harness with a Deutsch connector and is
sealed against the environment. It contains the relays for actuator direction and mechanical
force to idle. Anytime the Park Brake interlock is lost or the governor switch is turned of f, the
module disconnects the actuator from the ECU and forces it to Idle.
This is a sealed unit and can be mounted in any convenient location that provides protection
from physical damage.
ROTAUTCA
ECAFRETNI
UCETEKCOSNOITCNUF
A3-2CA TUOTCA
D3-2CE DNUORG
----------F+TTAB
E1-1CL A1#KLTNI
K3-1CM NONITCA
----------N BRIDTCA
----------P ARIDTCA
ROTCENNOC
HCSTUED
NS41-81-63DH
SLANIMRET
HCSTUED
14161-102-2640
4
PTEC II
I
l
+12 VDC
Hardware (cont.)
Dash Interlock Connections
System Power and Ground are connected to the harness through this connector . They should
be clean and as direct to the battery as possible. Two safety interlocks are connected to
system at this point. SYS READY, 12 VDC when Okay to Pump is achieved and INTLK#1
which is a ground typically when the Park Brake is set. INTLK #1 must be below 700mV to be
valid at the ECU.
+12 VDC
Okay to Pump
12 VDC Signal
Park Brake
Switch Ground
Batt +
Sys Ready
System Ground
Direct Battery
Interlock#1
A
D
a
s
h
B
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t
e
r
o
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D
C
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c
E
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The system diagnostic cable is placed between the Dash Interlock Connector and the Harness to facilitate set-up and diagnostics.
5
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