Harness And Wire Electrical Schematic Symbols
RENR7299-05 June 2010
Electrical Schematic Symbols And Definitions Fuse - A component in an electrical circuit that will open the circuit if too much current flows Fuse through it. Reed Switch: Aswitch whose contacts are controlled by a magnet. Amagnet closes the contacts of a normally open reed switch; it opens the contacts of a normally closed reed switch. Sender: Acomponent that is used with a temperature or pressure gauge. The sender measures the temperature or pressure. It s resistance changes to give an indication to the gauge of the temperature or pressure.
T
Relay (Magnetic Switch): Arelay is an electrical component that is activated by electricity. It has a coil that makes an electromagnet when current flows through it. The electromagnet can open or close the switch part of the relay. Solenoid: Asolenoid is an electrical component that is activated by electricity. It has a Solenoid: Asolenoid coil that makes an electromagnet when current flows through it. The electromagnet can open or close a valve or move a piece of metal that can do work. MAGNETIC LATCH SOLENOID - A magnetic latch solenoid is an electrical component that is activated by electricity and held latched by a permanent magnet. It has two coils (latch and unlatch) that make electromagnet when current flows through them. It also has an internal switch that places the latch coil circuit open at the time t he coil latches.
307D, 311D, 312D, 315D, 319D, 320D, 323D, M313D, M315D, M316D, M318D, M318D, and M322D Excavators Ai r Conditioning Electrical System
Harness And Wire Symbols
Typical representation of a Deutsch connector. The plug contains all sockets and the receptacle contains all pins.
1 2
Wire, Cable, or Harness Assembly Identification
Single Wire Connector
C
1 2
A
A
Component Part Number
AA 1
325-PK-14
Typical representation of a Sure-Seal connector. The plugand receptacle contain both pins and sockets.
9X-1123 325-PK-14
Plug
Receptacle
Socket
Wire Color
2 Ground
SAFETY.CAT.COM
©2010 Caterpillar All Rights Reserved
Pin or Socket Number
200-BK-14 Circuit Number Identification
Wire Gauge
Cat, Caterpillar, their respective logos, “Caterpillar Yellow” and the Power edge trade dress, as well as corporate and product identity used herein, are trademarks of Caterpillar and may not be used without permission.
Printed in U.S.A.
Electrical Schematic Symbols And Definitions Symbols
T
Pressure Symbol
Temperature Symbol
Level Symbol
Flow Symbol
Circuit Breaker Symbol
Symbols And Definitions Switch (Normally Open): Aswitch that will close at a specified point (temp, press, etc.).
Switch (Normally Open): Aswitch that is closed due to an applied condition, and will open again at a specified point (temp, press, etc.).
Switch (Normally Closed): A Closed): A switch that will open at a specified point (temp, press, etc.).
Switch (Normally Closed): A Closed): A switch that is open due to an applied condition, and will close again at a specified point (temp, press, etc.).
Screw Terminals: The circle indicates that the component has screw terminals and a wire can be disconnected from it.
No Terminals: No circle indicates that the wire cannot be disconnected from the component.
Ground (Wired): This indicates that the component is connected to a grounded wire. The grounded wire is fastened to the machine.
Ground (Case): This indicates that the component does not have a wire connected to ground. It is grounded by being fastened to the machine.
5 0 9 W 9 / , 2 B e g 7 P a R 2 1 N E R
7
6
4
5
PU/RD-20 PK/BK-20 S-BU-20
PK-20
PU/GN-20
BK/RD-20
F
1
1
BU/OR-20 BR/WH-20 BU/BK-20 BR/BK-20
2
3
F
WH/RD-20
L-GN/RD-20 PU/YL-20 BK/GN-20
BK-20
9 10 11 12 13 14 15 16
23 24 25 26 27 28
1
17 18 19 20 21 22
2
3
4
5
6
7
8
WH/YL-20
PK/GN-20
BR/OR-20
BK/YL-20
1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 1 1 1 1 1 1 1
7 8 9 0 1 2 3 4 5 6 7 8 1 1 1 2 2 2 2 2 2 2 2 2
0 - 0 0 0 0 2 0 0 0 0 0 2 2 0 0 2 2 2 D 2 2 2 - 2 - 2 - - - 2 - / - - R D N L 0 K K H 0 L N L U U B / B Y N / B / B / W 2 Y / G / G / R 2 Y / / - / - / K U G - K K R U R K Y K K Y R B P L B P B B B B G P B G O
0 0 0 0 0 2 2 - 2 - D - 2 - 0 2 R D K 2 - N R O / R / G / B U / / U U K B - U H B P P S P W
CONNA
L-GN/YL-20
GY/YL-20
CONNAA
0 0 0 2 2 L - 2 - Y L / R Y O / N / R H G B W L
1 2
DETAILOF CONNAA
GY/BU-20
1 2
12
DETAILOFCONN JJ
OR/BU-20
DETAILOFCONN HH
DETAILOFCONN GG
DETAILOF CONN A
GY/BU-20
PK-18
BK-20
BK/RD-20
DETAILOFCONN J
BK-20
DETAILOF CONN B
PU/RD-20
0 - 0 0 0 0 2 0 0 0 0 0 0 2 0 2 2 D 2 2 2 - 2 2 - 2 - 2 - - 2 - / - - U R D N L U L N 0 L 0 K K H Y G / / 2 / B / Y / N R / 2 - B / B / W / / G - Y / B K U G K K R U R Y K K K Y R - B B P L P B B B G P B B G O
CONNBB
PK/BK-20
BU/OR-20
L-GN/YL-20
S-BU-20
BR/OR-20
0 2 0 0 0 0 0 2 0 0 2 0 2 - 2 - 2 - - 2 - 2 - L - 2 Y R D K - N D R L / R / / Y N O / B / R / U G / / O U U K B - U H R H G B P P S P W B W L
1 2 3 4 5 6 7 8 9 0 1 2 3 4 1 1 1 1 1
1 2 3 4 5 6 7 8 9 0 1
0 2 0 0 0 0 0 0 - 0 0 2 0 0 2 0 2 2 2 2 2 2 - 2 - 2 - - 2 - D - - - U R D N L / 8 K K H L N 0 L U B Y N / B / B / W / Y / B / G / R 1 G 2 Y / / - / - / K U G - K K R U R Y K K K Y R B P L B P B B B G P B B G O
0 0 0 0 0 2 2 0 2 - 2 - - 2 - 2 D R D K - N R O / R / G / B U / / U U K B - U H B P P S P W
4
1 2 3 4 5 6 7
WH/RD-20
PU/GN-20
WH/RD-20
BU/OR-20
3
CONNCC
CONNC
CONNB
PU/GN-20
DETAILOFCONN G
OR/BU-20
2 DETAILOF CONN BB
E
DETAILOFCONN H
BK/YL-20 GY/BU-20
S-BU-20
PK/GN-20
GY/YL-20
PK/GN-20
GY/YL-20
L-GN/RD-20
WH/YL-20
BK/YL-20
GY/YL-20
BU/BK-20
BR/WH-20
BR/BK-20
BK/GN-20 PU/YL-20
GY/BU-20
BR/BK-20
BK/RD-20
BU/BK-20
PK-20
BK/GN-20
PK/GN-20
BR/WH-20
GY/YL-20
L-GN/RD-20
PU/YL-20 OR/BU-20
BK/YL-20 GY/YL-20
L-GN/YL-20
WH/YL-20
PK/BK-20
PU/RD-20
L-GN/RD-20
0 0 2 2 - L Y L / Y N / H G W L
WH/RD-20 PU/GN-20
GY/YL-20
PU/YL-20
CO NN JJ
CONNHH
1 2
E
CO NN GG
1 2
DETAIL OF CO CONN K
1 2
DETAIL OF OF CONN KK KK
DETAILOF CONN C
DETAILOF CONN CC
CO NN J BK/RD-20
GY/YL-20 BK-20
CO NN H
0 0 2 2 - L U Y / B / Y Y G G
15
OR/BU-20
CO NN G 0 0 2 2 - L N Y G / / Y K G P
0 0 2 - 2 L L Y Y / / Y K G B
OR/BU-20 BK-20
GY/YL-20 BK/RD-20
DETAILOF CONN DD
0 2 H W / R B
DETAILOF CONN D
5
GY/YL-20 1
2
MOTOR
A 5
OR/BU-20
DETAILOF CONN EE
DETAILOF CONN E
WH/RD-20
7
PU/GN-20 PU/YL-20
6 5 4
GY/YL-20
BK-20
14
BK/RD-20
CONNEE
2
CONNE
1
CONND
CONNDD
OR/BU-20
OR/BU-20
1
OR/BU-20
GY/YL-20
GY/YL-20
2
GY/YL-20
DETAILOF CONN F
3 2 1
L-GN/RD-20
0 2 K B / R O
1 2 3 4 5 6 7 CO NN K
CON NK K S-BU-20
OR/BK-20 PK/BK-20
DETAILOF CONNLL
DETAILOFCONN L
3 4 BK/RD-20 BK-20
5
BK/RD-20
6
BK-20
13
D
1
BU/OR-20
L-GN/RD-20
D
2
2
BK/RD-20
1
BK-20
1 2 3 4 5 6 7 PU/RD-20 BK/GN-20
GY/YL-20
DETAILOF CONNFF CO N N F F
C O N N F
DETAILOFCONN M
12 RD-14
PK-18
0 2 K B / R O
BK-14
DETAILOF CONNMM
6
RD/GN-16
OR/BK-18
BK-14
BR/BK-20
MOTOR 3 4 1 2 OR/BK-20
OR/BK-20
7 BK/BU-14
6 5
DETAILOFCONN S
8 1 K B / R O
8 8 1 - 1 D K R B
CO NN T
1 2
PK/BK-20
4 3 2
S-BU-20
1
CO NN L
Components List 1 2 3 4 5
OR/BK-18
6 7
BK-14
7
RD-14 RD/GN-16 PK-18
MOTOR
8 9 10 A 0 1
PU/RD-20
11
A 5 1
BU/OR-20
12
CO NN S
5 4
L-GN/RD-20
3 2 1
GY/YL-20
CONNMM
NEG
0 6 0 0 2 - 1 2 - 2 - L Y N K K / B / G B N / / R R G - D O 0 L R
0 0 4 2 - 2 - 1 L 4 K Y U 1 B / / / - B D R H K R O W P
CO NN U
4 1 3 2
4 1 3 2
4 1 4 1 - U U B / B / K K P B
CO NN R
0 2 0 4 2 1 - K K 4 U B / B 1 B / - / U R K K B B B B
CO NN P
1 2 CONNRR
4 2 1 CO NN PP
CONNUU
5 0 9 W 9 / , 2 B e g 7 P a R 2 1 N E R
7 6
BK/GN-20
CO NN M
POS
DETAILOFCONN NN
CO NN LL
LIGHT
C
BU/BK-20
DETAILOFCONN N
CO NN N
3 CO NN NN
MOTOR
11
OR /B K- 20
B
10
RD / G N- 16
9
OR/BK-20
8
Item No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Descripti on Contro troll Pan Panel el Ass Assemb embly ly Water Te Temper mperature Sens Sensor or Frost Sensor Recirculation Temperature Sensor Actuator Actuator Actuator Blower Control Blower Motor B lo we r M ai ai n R el ay ay Clutch Clu tch Soleno e noid Re Relay lay Refridge Refr idgerant rant Comp Compress ressor or P res su su re S wi tc tc h Ambient Temperature Sensor Air Co Condi nditioner t ioner Group
Part# 235-88 235 -8872 245-7831 245-7831 245-7835 245-7815 245-7817 245-7813 245-7817 245-7832 245-7839 1 96 96 -1 -1 66 66 6 196-16 196 -1666 259-7244 2597244 1 30 -0 27 0 235-8874 240-50 240 -5036
B
PK/BU-14 BK/BU-14
3 4 1 2 RD-18
3 4 1 2
BK-18
C
2
1
PK/BU-14 L-G N / YL - 20
O RB / K2- 0
WH/YL-20
RD-14
DETAILOFCONN UU
DETAILOFCONN T DETAILOFCONN U
DETAILOF CONNP
DETAILOF CONNR
DETAILOFCONN PP
DETAILOFCONN RR
A
A
This Schematic is for the Air Conditioning System - 307D, 311D, 312D, 315D, 319D, 320D, 323D, M313D, M315D, M316D, M318D, and M322D Excavators PART #: 235-8967 7
6
5
4
3
2
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