938g+ii+hydraulic+system
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RENR6079-01 August 2005
FLUID POWER SYMBOLS BASIC COMPONENT SYMBOLS MAIN AUX.
PUMP or MOTOR
2
1
4
3
6
5
2
7
3
TWO POSITION
ONE POSITION
4
5
7
6
8
PUMP: VARIABLE and PRESSURE COMPENSATED
2-SECTION PUMP
HYDRAULIC PNEUMATIC ENERGY TRIANGLES
VALVES
VALVE ENVELOPES
8
LINE RESTRICTION (FIXED)
RESTRICTION
PRESSURE COMPENSATION
LINE RESTRICTION (VARIABLE)
SPRING (ADJUSTABLE)
VARIABILITY
CONTROL VALVES
SPRING
FLUID CONDITIONER
ATTACHMENT
LINE RESTRICTION VARIABLE and PRESSURE COMPENSATED
VALVE PORTS
TWO-WAY
THREE POSITION
FOUR-WAY
THREE-WAY
CONTROL VALVES
CHECK VALVES
AB
AB
A 9
P T SHIFTED POSITION
P T NORMAL POSITION
11
MEASUREMENT
10
A
SHUTTLE
SPRING LOADED
BASIC SYMBOL
INFINITE POSITION
PILOT CONTROLLED
ROTATING SHAFTS
AA PRESSURE
FLOW
TEMPERATURE
12 61
60
16
17
18
19 15
21
20
B
B
BB
22
23
24
1
25
26
938G II: B9Y1-UP CRD1-UP PHN1-UP RTB1-UP
BIDIRECTIONAL
FLUID STORAGE RESERVOIRS
938G Series II Wheel Loader IT38G Series II Integrated Toolcarrier Hydraulic System
14
13
UNIDIRECTIONAL
VENTED
RETURN ABOVE FLUID LEVEL
PRESSURIZED
RETURN BELOW FLUID LEVEL
COMBINATION CONTROLS
SOLENOID or MANUAL
SOLENOID
IT38G II: CSX1-UP JAN1-UP
SERVO
SOLENOID and PILOT or MANUAL
SOLENOID and PILOT
DETENT
THERMAL
MANUAL CONTROL SYMBOLS
PUSH-PULL LEVER
GENERAL MANUAL
MANUAL SHUTOFF
PUSH BUTTON
PEDAL
SPRING
PILOT CONTROL SYMBOLS RELEASED PRESSURE
REMOTE SUPPLY PRESSURE
27 EXTERNAL RETURN
30
29
28 31
SPRING LOADED
GAS CHARGED
FIXED DISPLACEMENT
38 36
39
40
42
D
46
47
48
Item No.
51
E
52
53 54 55
56
57
GG
HH
F
F
JJ
58
59
IT38G Series II Wheel Loader Hydraulic Schematic
G g00953118
2
3
4
UNIDIRECTIONAL
BIDIRECTIONAL
BIDIRECTIONAL
TWO POSITION
THREE POSITION
INFINITE POSITIONING
CROSS FLOW
PARALLEL FLOW
FLOW IN ONE DIRECTION
FLOW ALLOWED IN EITHER DIRECTION
Printed in U.S.A.
Chart C (cont.) IT38G Series II Hydraulic Component Locations
Component
5
6
7
Schematic Location
Item No. 31
1
Stem (Fourth Function)
B3
2
Tilt Cylinders
A4
3
Lift Cylinders
4
Solenoid Valve (Ride Control) #
5
Solenoid Valve (Ride Control) #
6
Ride Control Accumulator
A5 A6
Component
Left Pedal Assembly
Schematic Location C6
32
Right Pedal Assembly
C7
33
Service Brakes Control Valve
C8
34
Hydraulic Oil Cooler
C2
35
Auxiliary Control Valve
C3
36
Tilt Control Valve
C4
7
Service Brake Oil Pressure Switch
A7
37
Lift Control Valve
C5
8
Accumulator Charging Valve
A8
38
Solenoid Valve (Hydraulic Fan)
C3
9
Main Control Valve %
A2
39
Hydraulic Oil Cooler Bypass Valve
C2
10
Main Relief Valve
A3
40
Rear Sevice Brakes
C6
11
Ride Control Check Valves #
A4
41
Front Service Brakes
C8
12
Inverse Shuttle Valve
A6
42
Steering Control Valve
D5
13
Flow Control Valve
A7
43
Steering Crossover Relief Valve
D6
14
Pressure Relief Valve
A8
44
Secondary Steering Pressure Switch *
15
Load Sensing Spool
A7
45
Primary Steering Pressure Switch
16
Line Relief Valve (Aux. Cylinder Rod End) @
17
Line Relief Valve (Aux. Cylinder Head End) @
18
Line Relief Valve (Tilt Cylinder Rod End)
19
Line Relief Valve (Tilt Cylinder Head End)
B3
46
Pressure and Flow Control Valve
D2
47
Secondary Steering Pump and Electric Motor *
D3
48
Diverter Valve (Secondary Steering) *
D4
B4
49
Steering Cylinders
D8
Make-up Valve
B5
50
Piston Pump (Hydraulic Fan)
E1
21
Diverter Valve (Ride Control) #
B6
51
Breaker Relief Valve (Hydraulic Tank)
E3
22
Pilot Selector and Pressure Control Valve
B1
52
Steering Metering Pump
E4
23
Ball Valve (Hydraulic Lever Lock)
B2
53
Hydraulic Oil Tank
E1
24
Stem (Auxiliary)
B3
54
Steering Pump
E3
25
Stem (Tilt)
B4
55
Check Valve (Pilot)
E4
26
Stem (Lift)
56
Steering Backup Relief Vavle
E6 F2
B5
27
Control Group (Pilot Valve)
57
Hydraulic Oil Filter
28
Fan Drive Motor
C1
58
Implement Pump
29
Rear Service Brakes Accumulator
C7
59
Braking Pump
30
Front Service Brakes Accumulator
C8
60
Line Relief Valve (Fourth Function Rod End)
61
Line Relief Valve (Fourth Function Head End)
51, 53, 57
34, 39
CC, DD, HH 12, 13, 14, 24, 25, 26,
40 AA, 29, 30
11, 21
31, 32, 33
49
28
51, 53, 57
GG, JJ, 22, 54, 55, 58, 59
23, 25, 36, 37
42, 43, 56
AA, 29, 30
44, 45, 48 23, 35, 36, 37
41
10, 16, 17, 18, 19, 20
31, 32 CC, DD, HH, 12, 13, 14, 24, 25, 26, 33
FF
F3 A3
40
38, 46, 50
BB, 47
28
4, 5, 6, 11, 21
2
3
# Ride Control is an optional attachment. @ Auxiliary Cylinders are an optional attachment
G
8
% The one stem valve (third function) is an optional attachment field conversion. The two valve stem is standard. Chart D IT38G Series II Hydraulic Pressure Tap Locations Pressure Tap
Description
Schematic Location
AA
Service Brake Accumulator Pressure
A7
BB
Implement Pilot Pump Pressure
B2
CC
Rear Service Brake Pressure
DD
Front Service Brake Pressure
C7
FF
Fan Drive Pump Pressure
C2
GG
Steering Pump Pressure
F4
HH
Hand Metering Unit Supply Pressure
F5
JJ
Implement Pump Pressure
F4
1
2
3
41
52
47
FF
10, 16, 17, 18, 19, 20
4, 5, 6,
D4
20
201-9068-00
1
VARIABLE DISPLACEMENT NON-COMPENSATED
D
Chart C IT38G Series II Hydraulic Component Locations
E
FIXED DISPLACEMENT
© 2005 Caterpillar All Rights Reserved
43
49
50
INTERNAL PASSAGEWAYS
41
45
44
VARIABLE DISPLACEMENT NON-COMPENSATED
DOUBLE ACTING
38, 46, 50 34, 39
40
GG, JJ 22, 54, 55, 58, 59
42, 43, 56
44, 45, 48 BB, 47
49
52
41
1
20 Page
FF
SINGLE ACTING
HYDRAULIC MOTORS
UNIDIRECTIONAL
DD
CC
37
HYDRAULIC AND PNEUMATIC CYLINDERS
LINES JOINING
LINES CROSSING
HYDRAULIC PUMPS
C
34
35
CROSSING AND JOINING LINES
INTERNAL SUPPLY PRESSURE
COMPLETE
RENR6079-01
C
SIMPLIFIED
ACCUMULATORS
33
32
INTERNAL RETURN
2
1
4
3
3
2
1
6
5
4
5
7
8 51, 53, 57
34, 39
6
7
40 AA, 29, 30
8
10, 16, 17, 18, 19, 20
4, 5, 6, 11, 21
31, 32, 33
1
2
3
41
52
47
FF
A 9
CC, DD, HH 12, 13, 14, 24, 25, 26,
11
10
A
AA
12 14
13 15
49
16
17
20
19
18
28
21
BB
22
23
24
25
27
26
40
38, 46, 50
B
B
GG, JJ, 22, 54, 55, 58, 59
51, 53, 57
23, 25, 36, 37
BB, 47 42, 43, 56
AA, 29, 30
31
C
41
10, 16, 17, 18, 19, 20 4, 5, 6, 11, 21
CC, DD, HH, 12, 13, 14, 24, 25, 26, 33
28
30
29
23, 35, 36, 37
31, 32
FF
28
44, 45, 48
2
3
1
33
32
C
34 36
35
37
38
DD
CC 39
FF
40
42
41
43
38, 46, 50 34, 39
D
47
Item No.
48 49
51
E
E
52
53 54 55
56
57
20 Page
RENR6079-01
50
GG
HH
F
F
JJ
58
59
938G Series II Wheel Loader Hydraulic Schematic
G g00953117
2
BB, 47
49
52
41
Chart C 938G Series II Hydraulic Component Locations
46
1
44, 45, 48
D
45
44
40
42, 43, 56
GG, JJ 22, 54, 55, 58, 59
3
4
5
6
7
Chart C (cont.) 938G Series II Hydraulic Component Locations Schematic Location
Item No.
1
Auxiliary Cylinders @
A3
31
Left Pedal Assembly
Schematic Location C6
2
Tilt Cylinders
A4
32
Right Pedal Assembly
C7
33
Service Brakes Control Valve
C8
34
Hydraulic Oil Cooler
C2
35
Auxiliary Control Valve
C3
Component
3
Lift Cylinders
4
Solenoid Valve (Ride Control) #
5
Solenoid Valve (Ride Control) #
6
Ride Control Accumulator
7
Service Brake Oil Pressure Switch
8
A5 A6
36
Tilt Control Valve
C4
A7
37
Lift Control Valve
C5
Accumulator Charging Valve
A8
38
Solenoid Valve (Hydraulic Fan)
C3
9
Main Control Valve %
A2
39
Hydraulic Oil Cooler Bypass Valve
C2
10
Main Relief Valve
A3
40
Rear Sevice Brakes
C6
11
Ride Control Check Valves #
A4
41
Front Service Brakes
C8
12
Inverse Shuttle Valve
A6
42
Steering Control Valve
D5
13
Flow Control Valve
A7
43
Steering Crossover Relief Valve
D6
14
Pressure Relief Valve
A8
44
Secondary Steering Pressure Switch *
15
Load Sensing Spool
A7
45
Primary Steering Pressure Switch
16
Line Relief Valve (Aux. Cylinder Rod End) @
17
Line Relief Valve (Aux. Cylinder Head End) @
18
Line Relief Valve (Tilt Cylinder Rod End)
B3
8
46
Pressure and Flow Control Valve
D2
47
Secondary Steering Pump and Electric Motor *
D3
48
Diverter Valve (Secondary Steering) *
D4
Line Relief Valve (Tilt Cylinder Head End)
B4
49
20
Make-up Valve
B5
50
Piston Pump (Hydraulic Fan)
E1
21
Diverter Valve (Ride Control) #
B6
51
Breaker Relief Valve (Hydraulic Tank)
E3
B1
52
Steering Metering Pump
E4
Hydraulic Oil Tank
E1
Steering Pump
E3
Steering Cylinders
D8
22
Pilot Selector and Pressure Control Valve
23
Ball Valve (Hydraulic Lever Lock)
B2
53
24
Stem (Auxiliary)
B3
54
25
Stem (Tilt)
B4
55
Check Valve (Pilot)
E4
26
B5
56
Steering Backup Relief Vavle
E6
27
Stem (Lift) Control Group (Pilot Valve)
28
Fan Drive Motor
29 30
57
Hydraulic Oil Filter
C1
58
Implement Pump
Rear Service Brakes Accumulator
C7
59
Braking Pump
Front Service Brakes Accumulator
C8
Pressure Tap
G
D4
19
Description
# Ride Control is an optional attachment. @ Auxiliary Cylinders are an optional attachment
Chart D 938G Series II Hydraulic Pressure Tap Locations
192-9949-00
Component
Schematic Location
AA
Service Brake Accumulator Pressure
A7
BB
Implement Pilot Pump Pressure
B2
CC
Rear Service Brake Pressure
DD
Front Service Brake Pressure
FF
Fan Drive Pump Pressure
C2
GG
Steering Pump Pressure
F4
HH
Hand Metering Unit Supply Pressure
F5
JJ
Implement Pump Pressure
F4
C7
% The one stem valve (third function) is an optional attachment field conversion. The two valve stem is standard.
F2 F3
FLUID POWER SYMBOLS BASIC COMPONENT SYMBOLS MAIN AUX.
PUMP or MOTOR
2
1
4
3
6
5
2
7
3
TWO POSITION
ONE POSITION
4
5
7
6
8
PUMP: VARIABLE and PRESSURE COMPENSATED
2-SECTION PUMP
HYDRAULIC PNEUMATIC ENERGY TRIANGLES
VALVES
VALVE ENVELOPES
8
LINE RESTRICTION (FIXED)
RESTRICTION
PRESSURE COMPENSATION
LINE RESTRICTION (VARIABLE)
SPRING (ADJUSTABLE)
VARIABILITY
CONTROL VALVES
SPRING
FLUID CONDITIONER
ATTACHMENT
LINE RESTRICTION VARIABLE and PRESSURE COMPENSATED
VALVE PORTS
TWO-WAY
THREE POSITION
FOUR-WAY
THREE-WAY
CONTROL VALVES
CHECK VALVES
AB
AB
A 9
P T SHIFTED POSITION
P T NORMAL POSITION
11
MEASUREMENT
10
A
SHUTTLE
SPRING LOADED
BASIC SYMBOL
INFINITE POSITION
PILOT CONTROLLED
ROTATING SHAFTS
AA PRESSURE
FLOW
TEMPERATURE
12 61
60
16
17
18
19 15
21
20
B
B
BB
22
23
24
1
25
26
938G II: B9Y1-UP CRD1-UP PHN1-UP RTB1-UP
BIDIRECTIONAL
FLUID STORAGE RESERVOIRS
938G Series II Wheel Loader IT38G Series II Integrated Toolcarrier Hydraulic System
14
13
UNIDIRECTIONAL
VENTED
RETURN ABOVE FLUID LEVEL
PRESSURIZED
RETURN BELOW FLUID LEVEL
COMBINATION CONTROLS
SOLENOID or MANUAL
SOLENOID
IT38G II: CSX1-UP JAN1-UP
SERVO
SOLENOID and PILOT or MANUAL
SOLENOID and PILOT
DETENT
THERMAL
MANUAL CONTROL SYMBOLS
PUSH-PULL LEVER
GENERAL MANUAL
MANUAL SHUTOFF
PUSH BUTTON
PEDAL
SPRING
PILOT CONTROL SYMBOLS RELEASED PRESSURE
REMOTE SUPPLY PRESSURE
27 EXTERNAL RETURN
30
29
28 31
SPRING LOADED
GAS CHARGED
FIXED DISPLACEMENT
38 36
39
40
42
D
46
47
48
Item No.
51
E
52
53 54 55
56
57
GG
HH
F
F
JJ
58
59
IT38G Series II Wheel Loader Hydraulic Schematic
G g00953118
2
3
4
UNIDIRECTIONAL
BIDIRECTIONAL
BIDIRECTIONAL
TWO POSITION
THREE POSITION
INFINITE POSITIONING
CROSS FLOW
PARALLEL FLOW
FLOW IN ONE DIRECTION
FLOW ALLOWED IN EITHER DIRECTION
Printed in U.S.A.
Chart C (cont.) IT38G Series II Hydraulic Component Locations
Component
5
6
7
Schematic Location
Item No. 31
1
Stem (Fourth Function)
B3
2
Tilt Cylinders
A4
3
Lift Cylinders
4
Solenoid Valve (Ride Control) #
5
Solenoid Valve (Ride Control) #
6
Ride Control Accumulator
A5 A6
Component
Left Pedal Assembly
Schematic Location C6
32
Right Pedal Assembly
C7
33
Service Brakes Control Valve
C8
34
Hydraulic Oil Cooler
C2
35
Auxiliary Control Valve
C3
36
Tilt Control Valve
C4
7
Service Brake Oil Pressure Switch
A7
37
Lift Control Valve
C5
8
Accumulator Charging Valve
A8
38
Solenoid Valve (Hydraulic Fan)
C3
9
Main Control Valve %
A2
39
Hydraulic Oil Cooler Bypass Valve
C2
10
Main Relief Valve
A3
40
Rear Sevice Brakes
C6
11
Ride Control Check Valves #
A4
41
Front Service Brakes
C8
12
Inverse Shuttle Valve
A6
42
Steering Control Valve
D5
13
Flow Control Valve
A7
43
Steering Crossover Relief Valve
D6
14
Pressure Relief Valve
A8
44
Secondary Steering Pressure Switch *
15
Load Sensing Spool
A7
45
Primary Steering Pressure Switch
16
Line Relief Valve (Aux. Cylinder Rod End) @
17
Line Relief Valve (Aux. Cylinder Head End) @
18
Line Relief Valve (Tilt Cylinder Rod End)
19
Line Relief Valve (Tilt Cylinder Head End)
B3
46
Pressure and Flow Control Valve
D2
47
Secondary Steering Pump and Electric Motor *
D3
48
Diverter Valve (Secondary Steering) *
D4
B4
49
Steering Cylinders
D8
Make-up Valve
B5
50
Piston Pump (Hydraulic Fan)
E1
21
Diverter Valve (Ride Control) #
B6
51
Breaker Relief Valve (Hydraulic Tank)
E3
22
Pilot Selector and Pressure Control Valve
B1
52
Steering Metering Pump
E4
23
Ball Valve (Hydraulic Lever Lock)
B2
53
Hydraulic Oil Tank
E1
24
Stem (Auxiliary)
B3
54
Steering Pump
E3
25
Stem (Tilt)
B4
55
Check Valve (Pilot)
E4
26
Stem (Lift)
56
Steering Backup Relief Vavle
E6 F2
B5
27
Control Group (Pilot Valve)
57
Hydraulic Oil Filter
28
Fan Drive Motor
C1
58
Implement Pump
29
Rear Service Brakes Accumulator
C7
59
Braking Pump
30
Front Service Brakes Accumulator
C8
60
Line Relief Valve (Fourth Function Rod End)
61
Line Relief Valve (Fourth Function Head End)
51, 53, 57
34, 39
CC, DD, HH 12, 13, 14, 24, 25, 26,
40 AA, 29, 30
11, 21
31, 32, 33
49
28
51, 53, 57
GG, JJ, 22, 54, 55, 58, 59
23, 25, 36, 37
42, 43, 56
AA, 29, 30
44, 45, 48 23, 35, 36, 37
41
10, 16, 17, 18, 19, 20
31, 32 CC, DD, HH, 12, 13, 14, 24, 25, 26, 33
FF
F3 A3
40
38, 46, 50
BB, 47
28
4, 5, 6, 11, 21
2
3
# Ride Control is an optional attachment. @ Auxiliary Cylinders are an optional attachment
G
8
% The one stem valve (third function) is an optional attachment field conversion. The two valve stem is standard. Chart D IT38G Series II Hydraulic Pressure Tap Locations Pressure Tap
Description
Schematic Location
AA
Service Brake Accumulator Pressure
A7
BB
Implement Pilot Pump Pressure
B2
CC
Rear Service Brake Pressure
DD
Front Service Brake Pressure
C7
FF
Fan Drive Pump Pressure
C2
GG
Steering Pump Pressure
F4
HH
Hand Metering Unit Supply Pressure
F5
JJ
Implement Pump Pressure
F4
1
2
3
41
52
47
FF
10, 16, 17, 18, 19, 20
4, 5, 6,
D4
20
201-9068-00
1
VARIABLE DISPLACEMENT NON-COMPENSATED
D
Chart C IT38G Series II Hydraulic Component Locations
E
FIXED DISPLACEMENT
© 2005 Caterpillar All Rights Reserved
43
49
50
INTERNAL PASSAGEWAYS
41
45
44
VARIABLE DISPLACEMENT NON-COMPENSATED
DOUBLE ACTING
38, 46, 50 34, 39
40
GG, JJ 22, 54, 55, 58, 59
42, 43, 56
44, 45, 48 BB, 47
49
52
41
1
20 Page
FF
SINGLE ACTING
HYDRAULIC MOTORS
UNIDIRECTIONAL
DD
CC
37
HYDRAULIC AND PNEUMATIC CYLINDERS
LINES JOINING
LINES CROSSING
HYDRAULIC PUMPS
C
34
35
CROSSING AND JOINING LINES
INTERNAL SUPPLY PRESSURE
COMPLETE
RENR6079-01
C
SIMPLIFIED
ACCUMULATORS
33
32
INTERNAL RETURN
2
1
4
3
3
2
1
6
5
4
5
7
8 51, 53, 57
34, 39
6
7
40 AA, 29, 30
8
10, 16, 17, 18, 19, 20
4, 5, 6, 11, 21
31, 32, 33
1
2
3
41
52
47
FF
A 9
CC, DD, HH 12, 13, 14, 24, 25, 26,
11
10
A
AA
12 14
13 15
49
16
17
20
19
18
28
21
BB
22
23
24
25
27
26
40
38, 46, 50
B
B
GG, JJ, 22, 54, 55, 58, 59
51, 53, 57
23, 25, 36, 37
BB, 47 42, 43, 56
AA, 29, 30
31
C
41
10, 16, 17, 18, 19, 20 4, 5, 6, 11, 21
CC, DD, HH, 12, 13, 14, 24, 25, 26, 33
28
30
29
23, 35, 36, 37
31, 32
FF
28
44, 45, 48
2
3
1
33
32
C
34 36
35
37
38
DD
CC 39
FF
40
42
41
43
38, 46, 50 34, 39
D
47
Item No.
48 49
51
E
E
52
53 54 55
56
57
20 Page
RENR6079-01
50
GG
HH
F
F
JJ
58
59
938G Series II Wheel Loader Hydraulic Schematic
G g00953117
2
BB, 47
49
52
41
Chart C 938G Series II Hydraulic Component Locations
46
1
44, 45, 48
D
45
44
40
42, 43, 56
GG, JJ 22, 54, 55, 58, 59
3
4
5
6
7
Chart C (cont.) 938G Series II Hydraulic Component Locations Schematic Location
Item No.
1
Auxiliary Cylinders @
A3
31
Left Pedal Assembly
Schematic Location C6
2
Tilt Cylinders
A4
32
Right Pedal Assembly
C7
33
Service Brakes Control Valve
C8
34
Hydraulic Oil Cooler
C2
35
Auxiliary Control Valve
C3
Component
3
Lift Cylinders
4
Solenoid Valve (Ride Control) #
5
Solenoid Valve (Ride Control) #
6
Ride Control Accumulator
7
Service Brake Oil Pressure Switch
8
A5 A6
36
Tilt Control Valve
C4
A7
37
Lift Control Valve
C5
Accumulator Charging Valve
A8
38
Solenoid Valve (Hydraulic Fan)
C3
9
Main Control Valve %
A2
39
Hydraulic Oil Cooler Bypass Valve
C2
10
Main Relief Valve
A3
40
Rear Sevice Brakes
C6
11
Ride Control Check Valves #
A4
41
Front Service Brakes
C8
12
Inverse Shuttle Valve
A6
42
Steering Control Valve
D5
13
Flow Control Valve
A7
43
Steering Crossover Relief Valve
D6
14
Pressure Relief Valve
A8
44
Secondary Steering Pressure Switch *
15
Load Sensing Spool
A7
45
Primary Steering Pressure Switch
16
Line Relief Valve (Aux. Cylinder Rod End) @
17
Line Relief Valve (Aux. Cylinder Head End) @
18
Line Relief Valve (Tilt Cylinder Rod End)
B3
8
46
Pressure and Flow Control Valve
D2
47
Secondary Steering Pump and Electric Motor *
D3
48
Diverter Valve (Secondary Steering) *
D4
Line Relief Valve (Tilt Cylinder Head End)
B4
49
20
Make-up Valve
B5
50
Piston Pump (Hydraulic Fan)
E1
21
Diverter Valve (Ride Control) #
B6
51
Breaker Relief Valve (Hydraulic Tank)
E3
B1
52
Steering Metering Pump
E4
Hydraulic Oil Tank
E1
Steering Pump
E3
Steering Cylinders
D8
22
Pilot Selector and Pressure Control Valve
23
Ball Valve (Hydraulic Lever Lock)
B2
53
24
Stem (Auxiliary)
B3
54
25
Stem (Tilt)
B4
55
Check Valve (Pilot)
E4
26
B5
56
Steering Backup Relief Vavle
E6
27
Stem (Lift) Control Group (Pilot Valve)
28
Fan Drive Motor
29 30
57
Hydraulic Oil Filter
C1
58
Implement Pump
Rear Service Brakes Accumulator
C7
59
Braking Pump
Front Service Brakes Accumulator
C8
Pressure Tap
G
D4
19
Description
# Ride Control is an optional attachment. @ Auxiliary Cylinders are an optional attachment
Chart D 938G Series II Hydraulic Pressure Tap Locations
192-9949-00
Component
Schematic Location
AA
Service Brake Accumulator Pressure
A7
BB
Implement Pilot Pump Pressure
B2
CC
Rear Service Brake Pressure
DD
Front Service Brake Pressure
FF
Fan Drive Pump Pressure
C2
GG
Steering Pump Pressure
F4
HH
Hand Metering Unit Supply Pressure
F5
JJ
Implement Pump Pressure
F4
C7
% The one stem valve (third function) is an optional attachment field conversion. The two valve stem is standard.
F2 F3
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