SENR6634-01
6 Page, UHE
©
1993 Caterpillar
All Rights Reserved
Printed in U.S.A.
SENR6634-01
November 1993
970F Wheel Loader
Hydraulic System
7PL1-UP
7SK1-UP
9JK1-UP
NO. COMPONENT
1REARAXLE
2 BRAKE CONTROL VALVE
3 PARKING BRAKE ACTUATOR
4
FRONT AXLE
5 REAR AXLE BRAKES ACCUMULATOR
6
FRONT AXLE BRAKES ACCUMULATOR
7 ACCUMULATOR CHARGING VA LVE
8 PARKING BRAKE CONTROL VALVE
9 LOW BRAKE OIL PRESSURE SWITCH
10
PARKING BRAKE SWIT CH
A WIRE TO BRAKE LIGHTS
B
WIRE TO TRANSMISSION NEUTRALIZER
CONTROL
C LINE FROM PILOT
P
U
M
P
D
R
E
T
U
R
N
L
I
N
E
T
O
H
Y
D
R
A
U
L
I
C
T
A
N
K
E
WIR
E
T
O
L
OW B
R
A
K
E
OIL
P
R
E
S
S
U
R
E
A
L
E
R
T
IN
D
I
C
A
T
OR
F
WIR
E
T
O
T
R
A
N
S
M
I
S
S
I
ON
C
ON
T
R
OL
970F (7SK224-UP) HYDRAULIC BRAKE SCHEMATIC
SENR6634-01
6 Page, UHE
NO. COMPONENT
1 PRESSURE CONTROL AND SELECTOR VALVE
2 LOCKOUT VALVE
3 PILOT CONTROL VALVES
4 TILT CYLINDER
5 LIFT CYLINDERS
6 RIDE CONTROL OIL A CCUMULAT O R
7 RIDE CONT ROL SOLENOID VALVE
8 MAIN CONTROL VALVE
9 SHUTTLE VALVE
10 MAIN RELIEF VALVE
11 LEFT STEERING CYLINDER
12 RIGHT ST EERING CYLINDER
13 HYDRAULIC OIL COOLER
14 METERING PUMP (STEERING)
15 LEFT NEUTRALIZER VALVE
16 STEERING MAKEUP VALVE
17 STEERING CONTROL VALVE
18 HYDRAULIC PUMP GROUP
19
PILOT RELIEF VALVE**
20 PRESSURE REDUCING VALVE***
21 CHECK VALVE*
22
FLOW SWITCH
23 RIGHT NEUTRALIZER VALVE
24
VENT VALVE
25 FILTER GROUP
26 HYDRAULIC TANK
27 FLOW SWITCH*
28
SUPPLEMENTAL STEERING DIVERTER VALVE
29 SUPPLEMENTAL STEERING PUMP
A LINE TO BRAKE SYSTEM
* EUROPE ONLY
** WITH AIR OVER HYDRAULIC BRAKES ONLY
*** WITH HYDRAULIC OVER HYDRAULIC BRAKES ONLY
970F HYDRAULIC SCHEMATIC
