a300 Hydraulic Schematic combined-hyd-schms

HYDRAULIC/HYDROSTATIC SCHEMATIC
WITH TWO SPEED VALVE
A300 (S/N 539911001 - 539940000)
(S/N 540011001 - 540040000)
SPRING LOADED FILTER BY-PASS
VALVE: 45-55 PSI (3,1-3,8 bar)
RESERVOIR:
Capacity . . . . . . . 18.8 qt. (17,8 L)
1
FILTER - CASE DRAIN (SINTERED
BRONZE)
32
2
19
PULL BUTTON ACTIVATED
DIRECTIONAL CONTROL VALVE -
LIFT ARM BY-PASS
9
RELIEF VALVE - MAIN:
3250-3350 PSI (224-231 bar)
at Front Quick Couplers
11
ANTICAVITATION VALVE
39
CHECK VALVE - With 80 PSI (5,5 bar) Spring
12
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - AUXILIARY
10
5
RELIEF/REPLENISHING VALVE - HIGH
PRESSURE: 5075 PSI (350 bar)
6
RELIEF VALVE - CHARGE INLET:
360 PSI (24,8 bar)
at High Engine Idle
With 140 degrees F. (60 degrees C.) Fluid
24
25
LOAD SHUTTLE VALVE - BLEED OFF
26
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - TWO COIL
LEGEND
FLOW DIVIDER ADJUSTMENT VALVE
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - FLOW CONTROL
SPOOL
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - LIFT CONTROL
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - UNLOADING
SPOOL
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - TILT CONTROL
DIFFERENTIAL PRESSURE SWITCH:
36-44 PSI (2,5-3,0 bar)
Normally Closed
FIXED CAPACITY DISPLACEMENT
BI-DIRECTIONAL HYDROSTATIC
MOTOR – Low Range
3
22
38
21
20
17
18
Printed in U.S.A.
8
HYDRAULIC PUMP . . . . . . . Gear Type
20.7 GPM (78,4 L/min.) at High Engine Idle
23
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - BASE
35
RESTRICTION
36
VARIABLE CAPACITY DISPLACEMENT
BI-DIRECTIONAL HYDROSTATIC PUMP
49
47
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE (TWO COIL)
48
RELIEF VALVE - 2000 PSI (137 bar)
4
DRIVE MOTOR SHUTTLE VALVE
7
FRONT AUXILIARY MANUAL
PRESSURE BLEED-OFF VALVE
13
37
SHUTTLE RELIEF VALVE
(Not Adjustable - Factory Set)
200 PSI (13,9 bar)
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - ROD
RELIEF VALVE - 1200 PSI (83 bar)
55
14
LOAD CHECK VALVE
27
PILOT ACTIVATED DIRECTIONAL
CONTROL VALVE - REAR AUXILIARY
28
42
40
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - BUCKET POSITION
VALVE (ON/OFF)
41
CHECK VALVE - BICS CONTROL VALVE
56
57
V-0774legend (11-14-07)
NOTE: Unless otherwise specified, springs have
NO significant pressure value.
(PRINTED NOVEMBER 2007)
V-0774legend
58
FILTER - Bob-Tach Valve
15
LIFT CYLINDER SPOOL - MADE TO
RESTRICT FLOW DURING BOOM
DOWN BUT NOT DURING BOOM UP
29
RESTRICTOR - 0.031 inch (0,8 mm)
RELIEF VALVE: 3300 PSI (228 bar)
30
FILTER - HYDRAULIC (CANISTER)
31
44
PILOT ACTIVATED DIRECTIONAL
CONTROL VALVE - HYDRAULIC
POWERED BOB-TACH
43
45
RESTRICTION - 0.089 inch (2,26 mm)
46
RESTRICTION - 0.025 inch (0,6 mm)
59
CHARGE PUMP -
13.6 GPM (51,5 L/min) at High Engine Idle
SERVO PISTON -Swash Plate
POSITION SENSOR -Swash Plate
SOLENOID ACTIVATED CONTROL
VALVE - FORWARD/REVERSE
CHARGE PRESSURE SENSOR
PORT RELIEF/ANTICAVITATION VALVE
4000 PSI (276 bar)
PORT RELIEF/ANTICAVITATION VALVE:
. . . . . (Optional)
3500 PSI (241,3 bar)
FIXED CAPACITY DISPLACEMENT
HYDRAULIC MOTOR
60
ANTICAVITATION VALVE
61
62
PROPORTIONAL RELIEF VALVE –
(Fan Speed Regulator):
1566 - 1784 PSI (108 - 123 bar)
64
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - BRAKE
HYDRAULIC BRAKE - SPRING APPLIED
- PRESSURE RELEASE
63
CHECK VALVE
52
RESTRICTION - 0.343 inch (8,7 mm)
FIXED CAPACITY DISPLACEMENT
BI-DIRECTIONAL HYDROSTATIC
MOTOR – High Range
FILTER - Brake Valve
65
66
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE – Make-Up Valve
67
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE – Two Speed
68
STEERING CYLINDERS
69
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE – Steering
70
CHECK VALVE - 270 PSI (18,6 bar)
50
SOLENOID ACTIVATED PRESSURE
CONTROL VALVE – 2000 PSI (138 bar)
16
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - BICS CONTROL
33
FILTER - BICS CONTROL VALVE
(SCREEN)
CHECK VALVE - BUCKET POSITION
VALVE
34
51
STEERING PUMP -
13.6 GPM (51,5 L/min) at High Engine Idle
53
PILOT ACTIVATED DIRECTIONAL
CONTROL VALVE – Two Speed
54
CHECK VALVE - With 300 PSI (20,7 bar) Spring
with 0.016 inch (0,40 mm) orifice
1 of 8
Dealer Copy -- Not for Resale
HYDRAULIC CONTROL VALVE
AUXILIARY
SPOOL
BICS CONTROL VALVE
OIL
COOLER
BUCKET POSITION VALVE (OPTIONAL)
LIFT CYLINDERS
TILT
SPOOL
LIFT ARM BY PASS VALVE
DRIVE MOTOR
DRIVE MOTOR
D
C
A
B
B A
B A
B
A
HYDRAULIC/HYDROSTATIC SCHEMATIC
WITH TWO SPEED
A300 (S/N 539911001 - 539940000)
(S/N 540011001 - 540040000)
(PRINTED NOVEMBER 2007)
(V-0774)
31
3
22
38
21
40
17
18
16
19
LIFT
SPOOL
34
20
2
TILT CYLINDERS
33
33
41
14
14
9
11
10
14
12
12
13
6
4
37
37
4
35
36
HYDRAULIC FILTER
5
5
5 5
HYDROSTATIC PUMPS
OUTLET
CHARGE
INLET
INLET
36
38
32
MALE
FEMALE
MALE
INTEGRATED QUICK
COUPLER BLOCK
7
7
D
C
A
B
1
32
15
HYDRAULIC POWERED
BOB-TACH (OPTIONAL)
P1
8
PP
P2
DR
REAR AUX VALVE (OPTIONAL)
(REAR QUICK
COUPLERS)
MALE
TP-OUT P-IN
BASE ROD
23
24
25
26
27
29
28
FEMALE
44
45
49
48
47
46
39
59
54
10
10
V-0775 (11-14-07)
43
57
57
51
55
56
56
55
31
2
3
58
52
62
61
60
FAN MOTOR
30
30
C
T
A
D
P
66
67
B
TWO SPEED VALVE
& BRAKE VALVE
64
65
65
Printed in U.S.A.
STEERING VALVE
69 69
69
50
P T
69
68
68
70
68
70
7070
(FRONT AUXILIARY
LEFT SIDE LIFT ARM)
68
32
42
53
63
63
42
53
2 of 8
Dealer Copy -- Not for Resale
HYDRAULIC/HYDROSTATIC SCHEMATIC
WITH TWO SPEED VALVE AND HIGH FLOW
A300 (S/N 539911001 - 539940000)
(S/N 540011001 - 540040000)
SPRING LOADED FILTER BY-PASS
VALVE: 45-55 PSI (3,1-3,8 bar)
RESERVOIR:
Capacity . . . . . . . 18.8 qt. (17,8 L)
1
FILTER - CASE DRAIN (SINTERED
BRONZE)
32
2
19
PULL BUTTON ACTIVATED
DIRECTIONAL CONTROL VALVE -
LIFT ARM BY-PASS
9
RELIEF VALVE - MAIN:
3250-3350 PSI (224-231 bar)
at Front Quick Couplers
11
ANTICAVITATION VALVE
39
CHECK VALVE - With 80 PSI (5,5 bar) Spring
12
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - AUXILIARY
10
5
RELIEF/REPLENISHING VALVE - HIGH
PRESSURE: 5075 PSI (350 bar)
6
RELIEF VALVE - CHARGE INLET:
360 PSI (24,8 bar)
at High Engine Idle
With 140 degrees F. (60 degrees C.) Fluid
24
25
LOAD SHUTTLE VALVE - BLEED OFF
26
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - TWO COIL
LEGEND
FLOW DIVIDER ADJUSTMENT VALVE
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - FLOW CONTROL
SPOOL
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - LIFT CONTROL
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - UNLOADING
SPOOL
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - TILT CONTROL
DIFFERENTIAL PRESSURE SWITCH:
36-44 PSI (2,5-3,0 bar)
Normally Closed
FIXED CAPACITY DISPLACEMENT
BI-DIRECTIONAL HYDROSTATIC
MOTOR – Low Range
3
22
38
21
20
17
18
Printed in U.S.A.
8
HYDRAULIC PUMP . . . . . . . Gear Type
20.7 GPM (78,4 L/min.) at High Engine Idle
23
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - BASE
35
RESTRICTION
36
VARIABLE CAPACITY DISPLACEMENT
BI-DIRECTIONAL HYDROSTATIC PUMP
49
47
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE (TWO COIL)
48
RELIEF VALVE - 2000 PSI (137 bar)
4
DRIVE MOTOR SHUTTLE VALVE
7
FRONT AUXILIARY MANUAL
PRESSURE BLEED-OFF VALVE
13
37
SHUTTLE RELIEF VALVE
(Not Adjustable - Factory Set)
200 PSI (13,9 bar)
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - ROD
RELIEF VALVE - 1200 PSI (83 bar)
55
14
LOAD CHECK VALVE
27
PILOT ACTIVATED DIRECTIONAL
CONTROL VALVE - REAR AUXILIARY
28
42
40
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - BUCKET POSITION
VALVE (ON/OFF)
41
CHECK VALVE - BICS CONTROL VALVE
56
57
V-0775legend (11-14-07)
NOTE: Unless otherwise specified, springs have
NO significant pressure value.
(PRINTED NOVEMBER 2007)
V-0775legend
58
FILTER - Bob-Tach Valve
15
LIFT CYLINDER SPOOL - MADE TO
RESTRICT FLOW DURING BOOM
DOWN BUT NOT DURING BOOM UP
29
RESTRICTOR - 0.031 inch (0,8 mm)
RELIEF VALVE: 3300 PSI (228 bar)
30
FILTER - HYDRAULIC (CANISTER)
31
44
PILOT ACTIVATED DIRECTIONAL
CONTROL VALVE - HYDRAULIC
POWERED BOB-TACH
43
45
RESTRICTION - 0.089 inch (2,26 mm)
46
RESTRICTION - 0.025 inch (0,6 mm)
59
CHARGE PUMP -
13.6 GPM (51,5 L/min) at High Engine Idle
SERVO PISTON -Swash Plate
POSITION SENSOR -Swash Plate
SOLENOID ACTIVATED CONTROL
VALVE - FORWARD/REVERSE
CHARGE PRESSURE SENSOR
PORT RELIEF/ANTICAVITATION VALVE
4000 PSI (276 bar)
PORT RELIEF/ANTICAVITATION VALVE:
. . . . . (Optional)
3500 PSI (241,3 bar)
FIXED CAPACITY DISPLACEMENT
HYDRAULIC MOTOR
60
ANTICAVITATION VALVE
61
62
PROPORTIONAL RELIEF VALVE –
(Fan Speed Regulator):
1566 - 1784 PSI (108 - 123 bar)
64
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - BRAKE
HYDRAULIC BRAKE - SPRING APPLIED
- PRESSURE RELEASE
63
CHECK VALVE
73
RESTRICTION - 0.343 inch (8,7 mm)
FIXED CAPACITY DISPLACEMENT
BI-DIRECTIONAL HYDROSTATIC
MOTOR – High Range
50
DUMP VALVE - (ON/OFF)
RELIEF VALVE - 3300 PSI (228 bar)
51
FILTER - Brake Valve
65
66
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE – Make-Up Valve
67
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE – Two Speed
68
STEERING CYLINDERS
69
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE – Steering
70
CHECK VALVE - 270 PSI (18,6 bar)
71
SOLENOID ACTIVATED PRESSURE
CONTROL VALVE – 2000 PSI (138 bar)
16
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - BICS CONTROL
33
FILTER - BICS CONTROL VALVE
(SCREEN)
CHECK VALVE - BUCKET POSITION
VALVE
34
52
CHECK VALVE
53
AUXILIARY HYDRAULIC PUMP -
16.0 GPM (60,5 L/min) at High Engine Idle
54
CHECK VALVE - With 300 PSI (20,7 bar) Spring
with 0.016 inch (0,40 mm) orifice
72
STEERING PUMP -
13.6 GPM (51,5 L/min) at High Engine Idle
74
PILOT ACTIVATED DIRECTIONAL
CONTROL VALVE – Two Speed
3 of 8
Dealer Copy -- Not for Resale
HYDRAULIC CONTROL VALVE
AUXILIARY
SPOOL
BICS CONTROL VALVE
OIL
COOLER
BUCKET POSITION VALVE (OPTIONAL)
LIFT CYLINDERS
TILT
SPOOL
LIFT ARM BY PASS VALVE
DRIVE MOTOR
DRIVE MOTOR
D
C
A
B
B A
B A
B
A
HYDRAULIC/HYDROSTATIC SCHEMATIC
WITH TWO SPEED AND HIGH FLOW
A300 (S/N 539911001 - 539940000)
(S/N 540011001 - 540040000)
(PRINTED NOVEMBER 2007)
(V-0775)
31
3
22
38
21
40
17
18
16
19
LIFT
SPOOL
34
20
2
TILT CYLINDERS
33
33
41
14
14
9
11
10
14
12
12
13
6
4
37
37
4
35
36
HYDRAULIC FILTER
5
5
5 5
HYDROSTATIC PUMPS
OUTLET
CHARGE
INLET
INLET
36
38
32
MALE
FEMALE
MALE
INTEGRATED QUICK
COUPLER BLOCK
7
7
D
C
A
B
1
32
15
HYDRAULIC POWERED
BOB-TACH (OPTIONAL)
P1
8
PP
P2
DR
REAR AUX VALVE (OPTIONAL)
(REAR QUICK
COUPLERS)
MALE
TP-OUT P-IN
BASE ROD
23
24
25
26
27
29
28
FEMALE
44
45
49
48
47
46
39
59
51
50
52
HIGH FLOW VALVE
54
10
10
V-0775 (11-14-07)
43
57
57
53
55
56
56
55
31
2
3
58
73
62
61
60
FAN MOTOR
30
30
C
T
A
D
P
66
67
B
TWO SPEED VALVE
& BRAKE VALVE
64
65
65
Printed in U.S.A.
STEERING VALVE
69 69
69
71
P T
69
68
68
70
68
70
7070
(FRONT AUXILIARY
LEFT SIDE LIFT ARM)
68
32
72
42
74
63
63
42
74
4 of 8
Dealer Copy -- Not for Resale
HYDRAULIC/HYDROSTATIC SCHEMATIC
WITH TWO SPEED VALVE
A300 (S/N 539940001 & ABOVE)
(S/N 540040001 & ABOVE)
SPRING LOADED FILTER BY-PASS
VALVE: 45-55 PSI (3,1-3,8 bar)
RESERVOIR:
Capacity . . . . . . . 18.8 qt. (17,8 L)
1
FILTER - CASE DRAIN (SINTERED
BRONZE)
32
2
19
PULL BUTTON ACTIVATED
DIRECTIONAL CONTROL VALVE -
LIFT ARM BY-PASS
9
RELIEF VALVE - MAIN:
3250-3350 PSI (224-231 bar)
at Front Quick Couplers
11
ANTICAVITATION VALVE
39
CHECK VALVE - With 80 PSI (5,5 bar) Spring
12
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - AUXILIARY
10
5
RELIEF/REPLENISHING VALVE - HIGH
PRESSURE: 5075 PSI (350 bar)
6
RELIEF VALVE - CHARGE INLET:
360 PSI (24,8 bar)
at High Engine Idle
With 140 degrees F. (60 degrees C.) Fluid
24
25
LOAD SHUTTLE VALVE - BLEED OFF
26
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - TWO COIL
LEGEND
FLOW DIVIDER ADJUSTMENT VALVE
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - FLOW CONTROL
SPOOL
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - LIFT CONTROL
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - UNLOADING
SPOOL
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - TILT CONTROL
DIFFERENTIAL PRESSURE SWITCH:
36-44 PSI (2,5-3,0 bar)
Normally Closed
FIXED CAPACITY DISPLACEMENT
BI-DIRECTIONAL HYDROSTATIC
MOTOR – Low Range
3
22
38
21
20
17
18
Printed in U.S.A.
8
HYDRAULIC PUMP . . . . . . . Gear Type
20.7 GPM (78,4 L/min.) at High Engine Idle
23
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - BASE
35
RESTRICTION
36
VARIABLE CAPACITY DISPLACEMENT
BI-DIRECTIONAL HYDROSTATIC PUMP
49
47
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE (TWO COIL)
48
RELIEF VALVE - 2000 PSI (137 bar)
4
DRIVE MOTOR SHUTTLE VALVE
7
FRONT AUXILIARY MANUAL
PRESSURE BLEED-OFF VALVE
13
37
SHUTTLE RELIEF VALVE
(Not Adjustable - Factory Set)
200 PSI (13,9 bar)
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - ROD
RELIEF VALVE - 1200 PSI (83 bar)
55
14
LOAD CHECK VALVE
27
PILOT ACTIVATED DIRECTIONAL
CONTROL VALVE - REAR AUXILIARY
28
42
40
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - BUCKET POSITION
VALVE (ON/OFF)
41
CHECK VALVE - BICS CONTROL VALVE
56
57
V-0958legend (11-14-07)
NOTE: Unless otherwise specified, springs have
NO significant pressure value.
(PRINTED NOVEMBER 2007)
V-0958legend
58
FILTER - Bob-Tach Valve
15
LIFT CYLINDER SPOOL - MADE TO
RESTRICT FLOW DURING BOOM
DOWN BUT NOT DURING BOOM UP
29
RESTRICTOR - 0.031 inch (0,8 mm)
RELIEF VALVE: 3300 PSI (228 bar)
30
FILTER - HYDRAULIC (CANISTER)
31
44
PILOT ACTIVATED DIRECTIONAL
CONTROL VALVE - HYDRAULIC
POWERED BOB-TACH
43
45
RESTRICTION - 0.089 inch (2,26 mm)
46
RESTRICTION - 0.025 inch (0,6 mm)
59
CHARGE PUMP -
13.6 GPM (51,5 L/min) at High Engine Idle
SERVO PISTON -Swash Plate
POSITION SENSOR -Swash Plate
SOLENOID ACTIVATED CONTROL
VALVE - FORWARD/REVERSE
CHARGE PRESSURE SENSOR
PORT RELIEF/ANTICAVITATION VALVE
4000 PSI (276 bar)
PORT RELIEF/ANTICAVITATION VALVE:
. . . . . (Optional)
3500 PSI (241,3 bar)
FIXED CAPACITY DISPLACEMENT
HYDRAULIC MOTOR
60
ANTICAVITATION VALVE
61
62
PROPORTIONAL RELIEF VALVE –
(Fan Speed Regulator):
1566 - 1784 PSI (108 - 123 bar)
64
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - BRAKE
HYDRAULIC BRAKE - SPRING APPLIED
- PRESSURE RELEASE
63
CHECK VALVE
52
RESTRICTION - 0.343 inch (8,7 mm)
FIXED CAPACITY DISPLACEMENT
BI-DIRECTIONAL HYDROSTATIC
MOTOR – High Range
FILTER - Brake Valve
65
66
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE – Make-Up Valve
67
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE – Two Speed
68
STEERING CYLINDERS
69
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE – Steering
70
CHECK VALVE - 270 PSI (18,6 bar)
50
SOLENOID ACTIVATED PRESSURE
CONTROL VALVE – 2000 PSI (138 bar)
16
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - BICS CONTROL
33
FILTER - BICS CONTROL VALVE
(SCREEN)
CHECK VALVE - BUCKET POSITION
VALVE
34
51
STEERING PUMP -
13.6 GPM (51,5 L/min) at High Engine Idle
53
PILOT ACTIVATED DIRECTIONAL
CONTROL VALVE – Two Speed
54
CHECK VALVE - With 300 PSI (20,7 bar) Spring
with 0.016 inch (0,40 mm) orifice
FILTER - HYDRAULIC
71
SPRING LOADED FILTER BY-PASS
VALVE: 75-83 PSI (5,2-5,7 bar)
72
5 of 8
Dealer Copy -- Not for Resale
HYDRAULIC CONTROL VALVE
AUXILIARY
SPOOL
BICS CONTROL VALVE
OIL
COOLER
BUCKET POSITION VALVE (OPTIONAL)
LIFT CYLINDERS
TILT
SPOOL
LIFT ARM BY PASS VALVE
DRIVE MOTOR
DRIVE MOTOR
D
C
A
B
B A
B A
B
A
HYDRAULIC/HYDROSTATIC SCHEMATIC
WITH TWO SPEED
A300 (S/N 539940001 & ABOVE)
(S/N 540040001 & ABOVE)
(PRINTED NOVEMBER 2007)
(V-0958)
31
3
22
38
21
40
17
18
16
19
LIFT
SPOOL
34
20
2
TILT CYLINDERS
33
33
41
14
14
9
11
10
14
12
12
13
6
4
37
37
4
35
36
HYDRAULIC FILTER
5
5
5 5
HYDROSTATIC PUMPS
OUTLET
CHARGE
INLET
INLET
36
38
32
MALE
FEMALE
MALE
INTEGRATED QUICK
COUPLER BLOCK
7
7
D
C
A
B
1
32
15
HYDRAULIC POWERED
BOB-TACH (OPTIONAL)
P1
8
PP
P2
DR
REAR AUX VALVE (OPTIONAL)
(REAR QUICK
COUPLERS)
MALE
TP-OUT P-IN
BASE ROD
23
24
25
26
27
29
28
FEMALE
44
45
49
48
47
46
39
59
54
10
10
V-0958 (11-14-07)
43
57
57
51
55
56
56
55
71
72
3
58
52
62
61
60
FAN
MOTOR
30
30
C
T
A
D
P
66
67
B
TWO SPEED VALVE
& BRAKE VALVE
64
65
65
Printed in U.S.A.
STEERING VALVE
69 69
69
50
P T
69
68
68
70
68
70
7070
(FRONT AUXILIARY
LEFT SIDE LIFT ARM)
68
32
42
53
63
63
42
53
6 of 8
Dealer Copy -- Not for Resale
HYDRAULIC/HYDROSTATIC SCHEMATIC
WITH TWO SPEED VALVE AND HIGH FLOW
A300 (S/N 539940001 & ABOVE)
(S/N 540040001 & ABOVE)
SPRING LOADED FILTER BY-PASS
VALVE: 45-55 PSI (3,1-3,8 bar)
RESERVOIR:
Capacity . . . . . . . 18.8 qt. (17,8 L)
1
FILTER - CASE DRAIN (SINTERED
BRONZE)
32
2
19
PULL BUTTON ACTIVATED
DIRECTIONAL CONTROL VALVE -
LIFT ARM BY-PASS
9
RELIEF VALVE - MAIN:
3250-3350 PSI (224-231 bar)
at Front Quick Couplers
11
ANTICAVITATION VALVE
39
CHECK VALVE - With 80 PSI (5,5 bar) Spring
12
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - AUXILIARY
10
5
RELIEF/REPLENISHING VALVE - HIGH
PRESSURE: 5075 PSI (350 bar)
6
RELIEF VALVE - CHARGE INLET:
360 PSI (24,8 bar)
at High Engine Idle
With 140 degrees F. (60 degrees C.) Fluid
24
25
LOAD SHUTTLE VALVE - BLEED OFF
26
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - TWO COIL
LEGEND
FLOW DIVIDER ADJUSTMENT VALVE
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - FLOW CONTROL
SPOOL
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - LIFT CONTROL
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - UNLOADING
SPOOL
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - TILT CONTROL
DIFFERENTIAL PRESSURE SWITCH:
36-44 PSI (2,5-3,0 bar)
Normally Closed
FIXED CAPACITY DISPLACEMENT
BI-DIRECTIONAL HYDROSTATIC
MOTOR – Low Range
3
22
38
21
20
17
18
Printed in U.S.A.
8
HYDRAULIC PUMP . . . . . . . Gear Type
20.7 GPM (78,4 L/min.) at High Engine Idle
23
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - BASE
35
RESTRICTION
36
VARIABLE CAPACITY DISPLACEMENT
BI-DIRECTIONAL HYDROSTATIC PUMP
49
47
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE (TWO COIL)
48
RELIEF VALVE - 2000 PSI (137 bar)
4
DRIVE MOTOR SHUTTLE VALVE
7
FRONT AUXILIARY MANUAL
PRESSURE BLEED-OFF VALVE
13
37
SHUTTLE RELIEF VALVE
(Not Adjustable - Factory Set)
200 PSI (13,9 bar)
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - ROD
RELIEF VALVE - 1200 PSI (83 bar)
55
14
LOAD CHECK VALVE
27
PILOT ACTIVATED DIRECTIONAL
CONTROL VALVE - REAR AUXILIARY
28
42
40
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - BUCKET POSITION
VALVE (ON/OFF)
41
CHECK VALVE - BICS CONTROL VALVE
56
57
V-0959legend (11-14-07)
(PRINTED NOVEMBER 2007)
V-0959legend
58
FILTER - Bob-Tach Valve
15
LIFT CYLINDER SPOOL - MADE TO
RESTRICT FLOW DURING BOOM
DOWN BUT NOT DURING BOOM UP
29
RESTRICTOR - 0.031 inch (0,8 mm)
RELIEF VALVE: 3300 PSI (228 bar)
30
FILTER - HYDRAULIC (CANISTER)
31
44
PILOT ACTIVATED DIRECTIONAL
CONTROL VALVE - HYDRAULIC
POWERED BOB-TACH
43
45
RESTRICTION - 0.089 inch (2,26 mm)
46
RESTRICTION - 0.025 inch (0,6 mm)
59
CHARGE PUMP -
13.6 GPM (51,5 L/min) at High Engine Idle
SERVO PISTON -Swash Plate
POSITION SENSOR -Swash Plate
SOLENOID ACTIVATED CONTROL
VALVE - FORWARD/REVERSE
CHARGE PRESSURE SENSOR
PORT RELIEF/ANTICAVITATION VALVE
4000 PSI (276 bar)
PORT RELIEF/ANTICAVITATION VALVE:
. . . . . (Optional)
3500 PSI (241,3 bar)
FIXED CAPACITY DISPLACEMENT
HYDRAULIC MOTOR
60
ANTICAVITATION VALVE
61
62
PROPORTIONAL RELIEF VALVE –
(Fan Speed Regulator):
1566 - 1784 PSI (108 - 123 bar)
64
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - BRAKE
HYDRAULIC BRAKE - SPRING APPLIED
- PRESSURE RELEASE
63
CHECK VALVE
73
RESTRICTION - 0.343 inch (8,7 mm)
FIXED CAPACITY DISPLACEMENT
BI-DIRECTIONAL HYDROSTATIC
MOTOR – High Range
50
DUMP VALVE - (ON/OFF)
RELIEF VALVE - 3300 PSI (228 bar)
51
FILTER - Brake Valve
65
66
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE – Make-Up Valve
67
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE – Two Speed
68
STEERING CYLINDERS
69
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE – Steering
70
CHECK VALVE - 270 PSI (18,6 bar)
71
SOLENOID ACTIVATED PRESSURE
CONTROL VALVE – 2000 PSI (138 bar)
16
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - BICS CONTROL
33
FILTER - BICS CONTROL VALVE
(SCREEN)
CHECK VALVE - BUCKET POSITION
VALVE
34
52
CHECK VALVE
53
AUXILIARY HYDRAULIC PUMP -
16.0 GPM (60,5 L/min) at High Engine Idle
54
CHECK VALVE - With 300 PSI (20,7 bar) Spring
with 0.016 inch (0,40 mm) orifice
72
STEERING PUMP -
13.6 GPM (51,5 L/min) at High Engine Idle
74
PILOT ACTIVATED DIRECTIONAL
CONTROL VALVE – Two Speed
FILTER - HYDRAULIC
75
SPRING LOADED FILTER BY-PASS
VALVE: 75-83 PSI (5,2-5,7 bar)
76
7 of 8
Dealer Copy -- Not for Resale
HYDRAULIC CONTROL VALVE
AUXILIARY
SPOOL
BICS CONTROL VALVE
OIL
COOLER
BUCKET POSITION VALVE (OPTIONAL)
LIFT CYLINDERS
TILT
SPOOL
LIFT ARM BY PASS VALVE
DRIVE MOTOR
DRIVE MOTOR
D
C
A
B
B A
B A
B
A
HYDRAULIC/HYDROSTATIC SCHEMATIC
WITH TWO SPEED AND HIGH FLOW
A300 (S/N 539940001 & ABOVE)
(S/N 540040001 & ABOVE)
(PRINTED NOVEMBER 2007)
(V-0959)
31
3
22
38
21
40
17
18
16
19
LIFT
SPOOL
34
20
2
TILT CYLINDERS
33
33
41
14
14
9
11
10
14
12
12
13
6
4
37
37
4
35
36
HYDRAULIC FILTER
5
5
5 5
HYDROSTATIC PUMPS
OUTLET
CHARGE
INLET
INLET
36
38
32
MALE
FEMALE
MALE
INTEGRATED QUICK
COUPLER BLOCK
7
7
D
C
A
B
1
32
15
HYDRAULIC POWERED
BOB-TACH (OPTIONAL)
P1
8
PP
P2
DR
REAR AUX VALVE (OPTIONAL)
(REAR QUICK
COUPLERS)
MALE
TP-OUT P-IN
BASE ROD
23
24
25
26
27
29
28
FEMALE
44
45
49
48
47
46
39
59
51
50
52
HIGH FLOW VALVE
54
10
10
V-0959 (11-14-07)
43
57
57
53
55
56
56
55
75
76
3
58
73
62
61
60
FAN
MOTOR
30
30
C
T
A
D
P
66
67
B
TWO SPEED VALVE
& BRAKE VALVE
64
65
65
Printed in U.S.A.
STEERING VALVE
69 69
69
71
P T
69
68
68
70
68
70
7070
(FRONT AUXILIARY
LEFT SIDE LIFT ARM)
68
32
72
42
74
63
63
42
74
8 of 8
Dealer Copy -- Not for Resale