MOTOR GP AIR START 205-4824 DRYER ASY AIR 101-8325
AIR SEAT
VALVE GP ENGINE WASTE GATE SOL 7T-9074
J GOVERNOR AS 4N-9680
DRYER ASY AIR 101-8325
12
PORT
3
VALVE GP AIR STARTER RELAY 115-9190
1
1
O
L F EXTERNAL AIR SUPPLY
VALVE GP AUTO LUBE SOL 7D-6081
F
VALVE GP DRAIN (SEC RESV) 7X-7655
VALVE GP SEC FOOT AIR BRAKE 247-1293
2
ATTACHM ENTS
2
3
10
VALVE GP RELAY 159-5149
VALVE GP SERVICE BRAKE 247-1292
RESERVOIR AIR (SEC) 162-7880
1
3
AIR
Y
VALVE AS SERVICE BRAKE RETRACT 236-6570
OIL
X
Y
Y
OIL
SEE HYDRAULIC SYSTEM SCHEMATIC
Y
VALVE GP AIR HORN SOL 7T-9074
CLEAN OUT HOSE
VALVE GP SHUTTLE 6D-3781
DBL CK VALVE
M
VALVE GP SEC FOOT AIR BRAKE 247-1293
2
Y
AIR START MOTOR CIRCUIT AUTO LUBE CIRCUIT
Pilot / Load Sensing Pressure
CLEAN OUT CIRCUIT ENGINE WASTE GATE CIRCUIT SECONDARY & PARKING BRAKE CONTROL CIRCUIT
Attachment
DIVERTER CONTROL CIRCUIT SERVICE BRAKE CONTROL CIRCUIT
2
3
VALVE GP INVERSION (SEC & PARK BRAKE) 172-6232
PILOT PUMP OUTPUT AIR HORN CICUIT
12
10 1
SWITCH AS SEC & PARK LOCKOUT PRESSURE 242-8903
OIL
PORT CHECK VALVE
B AIR HORN
SECONDARY RESERVOIR
INV VALVE SUP
B
CAB U SPPL Y
2
PROTECTED AIR
3
SECONDARY/P ARK ARK SIGN AL AL
4
SERVICE/RET ARDER ARDER SIG NAL NAL
5
SERVICE/RET ARDER/ARC ARDER/ARC SIGNAL TO DIVERTER
6
ARC I SGNA L
7
L U B ES Y S T EM
RESERVOIR AIR (SEC) 162-7880
REAR CAB WALL
B
AIR CIRCUIT COLOR DESCRIPTI ONS AIR COMPRESS OR OUTPUT OR
VALVE GP DIVERTER LOCKOUT SOL 188-3580
LINE PATTERNS
PILOT PUMP OUTPUT AIR HORN CICUIT
Pressure Line
AIR START MOTOR CIRCUIT AUTO LUBE CIRCUIT
Pilot / Load Sensing Pressure
NOTE A: TRUCK RUNNING.
1
BB
SEE HYDRAULIC SYSTEM SCHEMATIC
CLEANOUT CIRCUIT
ComponentGroup
ENGINE WASTE GATE CIRCUIT SECONDARY & PARKING BRAKE CONTROL CIRCUIT
Attachment
DIVERTER CONTROL CIRCUIT SERVICE BRAKE CONTROL CIRCUIT
PARKING BRAKE APPLIED.
AIR SYSTEM SCHEMATIC SCHEMATIC
A
VALVE GP INVERSION (SEC & PARK BRAKE) 172-6232
VALVE AS SERVICE BRAKE RETRACT 236-6570
CYLINDER GP REAR MASTER 8W-3405
CAB PORT FUNCTION
CC AA INV VALVE DELIVERY
INV VALVE CTRL
3
1
F
D
A
AIR
1
Pressure Line
E
CYLINDER GP FRONT MASTER 8W-3406
Y
A
PARK/SEC VALVE
S
X
2
2
ComponentGroup
SECONDARY
C
B
LINE PATTERNS
B
PARK BRAKE APPLIED
RETR
D
S WITCHAS SEC& PARK LOCKOUT PRESSURE XXX-X XXX-XXXX XXX
VALVE ASY PARK & SEC 213-1081
VALVE GP PARK BRAKE SW (DETENTED) 128-4971
M
N
AIR CIRCUIT COLOR DESCRIPTIO NS AIR COMPRESS OR OUTPUT OR
C
CAB
2
3
D
F
VALVE GP BRAKE DIVERTER SOLENOID 251-7763
VALVE GP PARK BRAKE SW (DETENTED) 128-4971
D
VALVE GP SEC & PARK BRAKE LOCK SOLENOID 188-3580
J
4
3
C
VALVE GP SEC & PARK BRAKE CONTROL 149-4133
S WITCHAS S EC & P ARK PRESSURE XXX-XXX X-XXXX X
VALVE GP DIVERTER LOCKOUT SOL 188-3580
CAB
SWITCH AS SEC & PARK PRESSURE 242-8903
1
A VALVE GP DIVERTER SOLENOID 251-7763
SENSOR GP AIR PRESSURE 141-5746
SECONDARY RESERVOIR
X
VALVE GP SEC & PARK BRAKE LOCKOUT SOLENOID 188-3580
1
ATTACHM ENTS
2
OIL SEE HYDRAULIC SYSTEM SCHEMATIC
CYLINDER GP FRONT MASTER 8W-3406
AIR X
2
AIR GUN (CLEAN OUT) 156-0927
1
Y
X
3 BK ON
U
S
VALVE ASY PARK & SEC 213-1081
X AIR
CYLINDER GP REAR MASTER 8W-3405
4
T
SEAT
BUDDY AIR SEAT
1
3
1
10
5
W
AIR
1
C
6 2 6 r 8 l o o 9 C , R e g a N P 0 E 2 R
VALVE GP SEC & PARK BRAKE CONTROL 149-4133
6
VALVE GP PRESS PROT 2G-8815 X
E H
2
B
7 Z
3
12
AIR SYSTEM BLOCK DIAGRAM
A
THIS SCHEMATIC IS FOR THE 793D OFF-HIGHWAY TRUCK Part #: 193-6208 CHG 00 Components are shown installed on a fully operable machine with the key and engine off and transmission shifter in neutral. Refer to the appropriate service manual for System Operation, Troubleshooting and Specifications. 10
9
8
7
D
VALVE GP DRAIN (SEC RESV) 7X-7655
P
2
VALVE GP PRESS PROTECT 2G-8815
SENSOR GP AIR PRESSURE 141-5746
VALVE GP SERVICE BRAKE 247-1292
VALVE GP SHUTTLE 6D-3781
VALVE GP RELAY 159-5149
M
ENGINE WASTEGA TE
E
VALVE GP REGULATOR (WASTE GATE) 8D-4755
3
12
GOVERNOR AS 4N-9680
SWITCH AS SERVICE BRAKE 3E-2034
ATTACH MENTS
K
SEAT
3
SWITCH AS SERVICE BRAKE 3E-2034
VALVE GP AIR START SOL 7D-6081
VALVE
COMPRESSOR GP AIR 160-9820
AIR
MOTOR GP AIR START 205-4824 (TDI TURBINE) 170-1133 (INGERSOL TURBINE) 4W-6633 (INGERSOL VANE)
SAFETY
AIR DRYER
FROM UNLOAD
4
RESERVOIR AIR (MAIN) 5T-1049
VALVE GP REGULATOR (WASTE GATE) 8D-4755 VALVE GP ENGINE WASTE GATE SOL 7T-9074
2
1
D
S
2 10
VALVE GP AIR STARTER RELAY 115-9190
G
(BUDDY)
VALVE GP DRAIN (MAIN RESV) 7X-7655
MAIN RESERVOIR
3
H
1
ATTACHMENT
2
1
JUNCTION BLOCK
2
VALVE GP AIR HORN SOL 7T-9074
VALVE GP AIR START SOL 7D-6081 COMPRESSOR GP AIR 160-9820
