Model 4700 Maintenance Manual
Section 8. Theory of Operation
All Dual Traction Motor Trucks and Single Traction Motor Trucks <S/N 10677 Item
Connection
Function Description
Theory of Operation
Pinout Matrix
Normal Level
Signal Source
Signal User
65
JEP-4
+V OUT
Jumper between JEP-4 and JEP-5 if TSA200-180 pump motor with 14cc hydraulic motor configuration present.
B+
PPA
PPA
66
JEP-5
CONF.
Jumper between JEP-4 and JEP-5 if TSA200-180 pump motor with 14cc hydraulic motor configuration present.
B+ if jumper in place. 0V - no jumper.
PPA
PPA
67
JEP-6 thru 14
NOT USED
68
JFP-1
+V KEY
B+ from Key switch (SW1). If not present, check Key switch, wiring, and connections.
B+
SW1
PPA
69
JFP-2
+V COIL
Voltage from the PPA to CT2 coil (J50-6). If not present, check the PPA, wiring, and connections. Approx. 32 ohms across coil.
B+
PPA
CT2
70
JFP-3 and 4
NOT USED
71
JFP-5
SAFETY/ AMPLIFIER ENABLE
B– from JFP-11 on the PPA. If voltage is >1V (wrt B–) check jumper from JFP-11. If jumper is OK, check B– to PPA.
Battery voltage wrt BT1+
PPA
PPA
72
JFP-6
PM TEMP
Input to the PPA from the Pump Motor (PM) temperature switch (TS3). Input will be low under normal operating conditions. If overtemp condition exists [>266°F (130°C)], input will be high. Allow to cool. If still open (high), check switch, wiring, and connections.
Approx. 0V closed; 9V open
TS3
PPA
73
JFP-7
NOT USED
74
JFP-8
–V COIL
Voltage from the PPA to CT2 coil (J50-5). If not present, check the PPA, wiring, and connections. Approx. 32 ohms across coil.
Approx. B+ to energize coil; drops to approx. 14V for holding wrt B+
PPA
CT2
75
JFP-9 and 10
NOT USED
76
JFP-11
B–
Ties the Amplifier Enable (SAFETY) input (JFP-5) to low. If not present, check B– to the PPA.
Battery voltage wrt BT1+
PPA
PPA
77
JFP-12
TERM
Ground from the PPA to the Pump Motor (PM) temperature switch (TS3). If not present, check B– to the PPA, wiring, and connections.
Battery voltage wrt BT1+
PPA
TS3
78
JP2-1
B–
Configuration jumper installed on single traction motor trucks only.
B–
PPA
PPA
Publication 1160093, Issued: 20 May 2013
8-19
