553 Hydraulic Schematic v-0138legend-2

Posted in 553
HYDRAULIC/HYDROSTATIC SCHEMATIC
553 (S/N 520311001 AND ABOVE)
(S/N 520411001 AND ABOVE)
(PRINTED AUGUST 2002)
V-0138legend
17
HYDRAULIC FLUID TEMPERATURE
SWITCH: 224-234 degrees F.
(107-112 degrees C.)
RESERVOIR:
Capacity . . . . . . . . . 9.2 Qts. (8,7 L)
1
DRIVE MOTOR SHUTTLE VALVE
2
3
4
21
PULL BUTTON ACTIVATED
DIRECTIONAL CONTROL VALVE - LIFT
ARM BY PASS
18
FILTER - TILT LOCK VALVE (SCREEN)
13
LOAD CHECK VALVE
12
DUAL STAGE RELIEF VALVE - MAIN:
2300/3000 PSI (15859/20685 kPa)
at Front Quick Couplers
10
RELIEF/REPLENISHING VALVE - HIGH
PRESSURE: 3750 PSI (25856 kPa)
V-0138legend (8-20-02)
NOTE: Unless otherwise specified
springs have NO significant
pressure value.
LEGEND
FLOW DIVIDER ADJUSTMENT VALVE
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - FLOW CONTROL
SPOOL
CHECK VALVE - BUCKET POSITION
VALVE
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - UNLOADING
SPOOL
FIXED CAPACITY DISPLACEMENT
BIDIRECTIONAL HYDRAULIC/
HYDROSTATIC MOTOR
26
28
7
27
25
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - BUCKET POSITION
VALVE (ON/OFF)
Printed in U.S.A.
CHARGE PRESSURE SWITCH:
30-40 PSI (207-276 kPa)
5
FILTER - HYDRAULIC/HYDROSTATIC
(CANISTER)
6
SPRING LOADED FILTER BYPASS
VALVE: 45-55 PSI (311-379 kPa)
8
VARIABLE CAPACITY DISPLACEMENT
BIDIRECTIONAL HYDRAULIC/
HYDROSTATIC PUMP
9
HYDRAULIC PUMP:
Gear Type . . . . . . 11 GPM (42 L/min.)
at 3000 RPM
11
REPLENISHING VALVE
14
DIFFERENTIAL PRESSURE SWITCH:
25-46 PSI (172-317 kPa)
15
ONE WAY RESTRICTOR VALVE - LIFT:
0.125" (3,175 mm)
16
20
SOLENOID ACTIVATED DIRECTIONAL
CONTROL VALVE - LIFT/TILT CONTROL
19
CHECK VALVE - TILT LOCK VALVE
22
CHECK VALVE - LIFT LOCK VALVE
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - TILT CONTROL
23
PILOTED ACTIVATED DIRECTIONAL
CONTROL VALVE - LIFT CONTROL
24
ONE WAY RESTRICTOR VALVE - TILT:
0.109" (2,769 mm)
ANTICAVITATION
29
ANTICAVITATION
30
OIL COOLER BY-PASS
117-135 PSI (807-931 kPa)
31
CHARGE RELIEF VALVE
45-65 PSI (310-448 kPa)
32
PORT RELIEF VALVE
3500 PSI (24131 kPa)
33
1 of 1
Dealer Copy -- Not for Resale