t870 Hydraulic Schematic v-1397legend-ALL-2

HYDRAULIC/HYDROSTATIC SCHEMATIC
WITH ALL OPTIONS
T870 (S/N A3PG11001 AND ABOVE)
(S/N A3PH11001 AND ABOVE)
(PRINTED SEPTEMBER 2010)
V-1397legend
FILTER - HYDRAULIC (CANISTER)
SPRING LOADED FILTER BY-PASS
VALVE: 25 PSI (1,7 bar)
RESERVOIR:
Capacity at sight gauge . . 10.3 Qts. (9,75 L)
System Capacity . . . . . . . . 9.5 Gal. (36 L)
1
2
19
PULL BUTTON ACTIVATED
DIRECTIONAL CONTROL VALVE - LIFT
ARM BY-PASS
14
LOAD CHECK VALVE
9
RELIEF VALVE - MAIN:
3450 - 3550 PSI (238 - 245 bar)
at Front Quick Couplers
11
12
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - AUXILIARY
10
5
6
24
25
26
27
28
29
LEGEND
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - LIFT CONTROL
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - TILT CONTROL
DIFFERENTIAL PRESSURE SWITCH:
15 PSI (1,07 bar)
Normally Closed
3
22
21
20
Printed in U.S.A.
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - BICS CONTROL
8
23
35
4
7
FRONT AUXILIARY MANUAL PRESSURE
BLEED-OFF VALVE
13
LIFT CYLINDER SPOOL - MADE TO
RESTRICT FLOW DURING BOOM
DOWN BUT NOT DURING BOOM UP
RELIEF/ANTICAVITATION VALVE -
PORT 4500 PSI (310 bar)
FIXED CAPACITY DISPLACEMENT
HYDRAULIC MOTOR
ANTICAVITATION VALVE
PROPORTIONAL RELIEF VALVE –
(Fan Speed Regulator):
1566 - 1784 PSI (108 - 123 bar)
SENSOR – HYD. TEMPERATURE
SENSOR – CHARGE PRESSURE –
Fan Filter
15
SIGHT GAUGE
DIAGNOSTIC COUPLER
RELIEF/ANTICAVITATION VALVE -
PORT 4000 PSI (276 bar)
(AUXILIARY RELIEF IS OPTIONAL)
SPRING LOADED FILTER BY-PASS
VALVE: 75 - 83 PSI (5,2 - 5,7 bar)
FILTER - HYDRAULIC (CANISTER)
30
HYDRAULIC BRAKE – SPRING APPLIED
PRESSURE RELEASE (SAPR)
Not Used For This Model
Not Used For This Model
FIXED CAPACITY DISPLACEMENT
BIDIRECTIONAL HYDROSTATIC
MOTOR
FILTER - BICS CONTROL VALVE
(SCREEN)
17
16
CHECK VALVE - With 14.5 PSI (1,0 bar)
Spring
18
RESTRICTION . . . . . . . 0.079 in. (2,0 mm)
32
31
33
34
VARIABLE CAPACITY DISPLACEMENT
BIDIRECTIONAL HYDROSTATIC PUMP
ANTICAVITATION VALVE
38
36
37
SERVO PISTON – Swash Plate
RESTRICTION - 0.067 inch (1,7 mm)
CHECK VALVE - With 200 PSI (13,8 bar)
Spring
DRIVE MOTOR SHUTTLE VALVE
CHECK VALVE – COLD WEATHER BY-PASS
With 50 PSI (3,45 bar) Spring
1 of 2
Dealer Copy -- Not for Resale
44
39
42
V-1397legend (9-9-10)
NOTE: Unless otherwise specified
springs have NO significant
pressure value.
43
40
HYDRAULIC PUMP . . . . . . . Gear Type
23.8 GPM (90,1 L/min.) at High Engine Idle
41
47
48
46
45
CHARGE PUMP -
13.5 GPM (51,1 L/min) at High Engine Idle
FILTER - BRAKE
Not Used For This Model
Not Used For This Model
Not Used For This Model
SOLENOID ACTIVATED DIRECECTIONAL
CONTROL VALVE – BRAKE
RELIEF/REPLENISHING VALVE - HIGH
PRESSURE: 5294 PSI (365 bar)
49
RELIEF VALVE - CHARGE INLET:
430 - 530 PSI (29,6 – 36,5 bar) at
High Engine Idle With 140 degrees F.
(60 degrees C.) Fluid
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE – FORWARD/REVERSE
FILTER (Screen)
50
51
52
53
54
55
56
57
58
59
HIGH FLOW HYDRAULIC PUMP Gear Type
13.6 GPM (51,5 L/min.) at High Engine Idle
RELIEF VALVE - 3500 PSI (241 bar)
DUMP VALVE – ON / OFF
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE (TWO COIL)
PILOT ACTIVATED DIRECTIONAL
CONTROL VALVE - HYDRAULIC
POWERED BOB-TACH
RESTRICTION - 0.089 inch (2,26 mm)
FILTER - BOB-TACH VALVE
RELIEF VALVE - 1200 PSI (83 bar)
CHECK VALVE - With 80 PSI (5,5 bar) Spring
RELIEF VALVE - 2000 PSI (137 bar)
RESTRICTION - 0.025 inch (0,6 mm)
CHECK VALVE - With 300 PSI (20,7 bar)
Spring And With 0.016 inch (0,40 mm) Orifice
FILTER – BOB-TACH VALVE
61
62
63
65
64
66
67
69
68
70
60
LOAD SHUTTLE VALVE - BLEED OFF
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - TWO COIL
PILOT ACTIVATED DIRECTIONAL
CONTROL VALVE - REAR AUXILIARY
RESTRICTOR - 0.031 inch (0,8 mm)
RELIEF VALVE: 3300 PSI (228 bar)
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - BASE
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - ROD
FLOW DIVIDER ADJUSTMENT VALVE
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - FLOW CONTROL
SPOOL
CHECK VALVE - BUCKET POSITION
VALVE
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - BUCKET POSITION
VALVE (ON/OFF)
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - UNLOADING
SPOOL
71
72
73
74
75
76
77
HIGH PRESSURE CHAMBER
LOW PRESSURE CHAMBER
RIDE CONTROL VALVE
HYDRAULIC/HYDROSTATIC SCHEMATIC
WITH ALL OPTIONS
T870 (S/N A3PG11001 AND ABOVE)
(S/N A3PH11001 AND ABOVE)
(PRINTED SEPTEMBER 2010)
V-1397legend
LEGEND
2 of 2
Dealer Copy -- Not for Resale