a300 Hydraulic Schematic v-0670legend-2

FILTER - HYDRAULIC (CANISTER)
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 (90 Micron)
2
3
4
15
PULL BUTTON ACTIVATED
DIRECTIONAL CONTROL VALVE -
LIFT ARM BY-PASS
16
FILTER - BICS CONTROL VALVE
(SCREEN)
17
FILTER - BOB-TACH VALVE
18
LOAD CHECK VALVE - LIFT AND TILT
19
RELIEF VALVE - MAIN:
3250-3350 PSI (224-231 bar)
at Front Quick Couplers
5
20
21
ANTICAVITATION VALVE
22
RELIEF/ANTICAVITATION VALVE -
PORT (TILT BASE END)
4000 PSI (275 bar)
23
24
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - AUXILIARY
25
26
RELIEF/REPLENISHING VALVE - HIGH
PRESSURE: 5221 PSI (381 kbar)
27
CHARGE PRESSURE SWITCH
28
RELIEF VALVE - CHARGE:
140 degrees F. (60 degrees C.)Fluid
330-360 PSI (22,7-24,8 kPa) at High
Engine Idle
34
35
PILOT ACTIVATED DIRECTIONAL
CONTROL VALVE - HYDRAULIC
POWERED BOB-TACH
FLOW DIVIDER ADJUSTMENT VALVE
PILOT ACTIVATED DIRECTIONAL
CONTROL VALVE - FLOW CONTROL
SPOOL
PILOT ACTIVATED DIRECTIONAL
CONTROL VALVE - LIFT CONTROL
CHECK VALVE - BUCKET POSITION
VALVE
PILOT ACTIVATED DIRECTIONAL
CONTROL VALVE - UNLOADING
SPOOL
PILOT ACTIVATED DIRECTIONAL
CONTROL VALVE - TILT CONTROL
DIFFERENTIAL PRESSURE SWITCH:
36-44 PSI (2,5-3,0 kPa)
FIXED CAPACITY DISPLACEMENT
BIDIRECTIONAL HYDROSTATIC
MOTOR
6
7
8
9
10
11
12
13
53
54
14
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - BICS CONTROL
29
CHARGE PUMP
11.1 GPM (42 Lpm) @ High Engine Idle
30
HYDRAULIC PUMP . . . . . . . . . Gear Type
20.7 GPM (78,4 Lpm) @ High Engine Idle
31
DRIVE MOTOR SHUTTLE VALVE
32
SHUTTLE RELIEF VALVE: 200 PSI (13,8 bar)
33
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - BASE
LOAD SHUTTLE VALVE - BLEED OFF
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - ROD
RELIEF/ANTICAVITATION VALVE -
PORT (LIFT BASE END)
4000 PSI (275 bar)
RELIEF/ANTICAVITATION VALVE -
PORT (TILT ROD END)
4000 PSI (275 bar)
RELIEF/ANTICAVITATION VALVE -
PORT - OPTIONAL:
3100 PSI (214 bar)
55
56
57
HYDRAULIC/HYDROSTATIC SCHEMATIC
WITH TWO SPEED VALVE
AND HIGH FLOW OPTION
A300 (S/N 526412000 & Above)
(S/N 526512000 & Above)
LEGEND
(PRINTED MARCH 2005)
V-0670
1 of 2
Dealer Copy -- Not for Resale
36
37
38
39
40
50
CHECK VALVE WITH 0.03 RESTRICTION
AND 300 PSI (20,7 bar) SPRING
51
52
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - BUCKET POSITION
VALVE (ON/OFF)
FIXED CAPACITY DISPLACEMENT
BIDIRECTIONAL HYDROSTATIC
MOTOR
53
HYDRAULIC BRAKE - SPRING APPLIED -
PRESSURE TO RELEASE
54
41
CHECK VALVE - BICS CONTROL VALVE
42
LIFT ARM BY-PASS RESTRICTOR
43
44
45
VARIABLE CAPACITY DISPLACEMENT
BIDIRECTIONAL HYDROSTATIC PUMP
46
RELIEF VALVE - 2000 PSI (138 bar)
47
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE (TWO COIL)
48
RELIEF VALVE - 1200 PSI (83 bar)
49
CHECK VALVE WITH 80 PSI (5,5 bar)
SPRING
58
FILTER (BRAKE)
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE (TWO COIL)
PILOT ACTIVATED DIRECTIONAL
CONTROL VALVE - FOR REAR AUXILIARY
ORIFICE WITH 0.140 RESTRICTION
RELIEF VALVE - 3300 PSI (227 bar)
ORIFICE WITH 0.031 RESTRICTION
59
PILOT ACTIVATED DIRECTIONAL
CONTROL VALVE - TWO SPEED
DRIVE MOTOR
60
PUMP SERVO
FILTER - CASE DRAIN (Attachment)
61
HYDRAULIC STEERING PUMP - Gear Type
13.6 GPM (51,5 Lpm) @ High Engine Idle
62
FILTER - STEERING (10 MICRON)
63
SOLENOID ACTIVATED
PROPORTIONAL FLOW CONTROL
VALVE - STEERING
64
SOLENOID ACTIVATED PRESSURE
CONTROL VALVE
65
STEERING CYLINDER
66
CHECK VALVE - 270 PSI (18,6 bar)
67
PRESSURE CONTROL PILOT
VALVE - 2 COILS
0 - 0.085 Ampere
68
DISPLACEMENT CONTROL SPOOL
FRONT AUXILIARY MANUAL
PRESSURE BLEED-OFF VALVE
69
70
ORIFICE WITH 0.120 RESTRICTION
ORIFICE WITH 0.025 RESTRICTION
72
RELIEF VALVE - 3300 PSI (228 bar)
73
SOLENOID DUMP VALVE - ON/OFF
CHECK VALVE - HIGH FLOW
71
HIGH FLOW PUMP - Gear Type
S/N 526412000 - 526412199
S/N 526512000 - 526512099
10.2 GPM (38,6 Lpm) @ High Engine Idle
S/N 526412200 & Above
S/N 526512100 & Above
20.7 GPM (76,8 Lpm) @ High Engine Idle
V-0670 (3/8/05)
55
56
57
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - TWO SPEED
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - MAKE-UP
PUSH BUTTON SOLENOID ACTIVATED
DIRECTIONAL CONTROL VALVE -
BRAKE
HYDRAULIC/HYDROSTATIC SCHEMATIC
WITH TWO SPEED VALVE
AND HIGH FLOW OPTION
A300 (S/N 526412000 & Above)
(S/N 526512000 & Above)
LEGEND
(PRINTED MARCH 2005)
V-0670
2 of 2
Dealer Copy -- Not for Resale