HYDRAULIC/HYDROSTATIC SCHEMATIC 331 (S/N 232511001 - 232512782) 331E (S/N 232711001 - 232711433) 334 (S/N 232611001 - 232612157) (PRINTED AUGUST 2002) V-0063legend
LEGEND 1
HYDRAULIC RESERVOIR (PRESSURIZED)with FILL STRAINER Capacity . . . . . . 31.2 Qts. (29,5 L)
2
PRESSURIZED BREATHER/FILL CAP with FILTER 5 PSI (34 kPa) - Outlet 0.435 PSI (3 kPa) - Inlet
3
SOLENOID VALVE - SYSTEM BY-PASS
16 PORT RELIEF VALVE Bucket Cylinder (Base End) 2950 PSI (20340 kPa) 17 PORT RELIEF VALVE Arm Cylinder (Base End) 2950 PSI (20340 kPa) 18 PORT RELIEF VALVE Arm Cylinder (Rod End) 2950 PSI (20340 kPa)
4 MAIN RELIEF VALVE 3500 PSI (24138 kPa)
19 LOAD CHECK VALVE Boom Swing Cylinder
5
AUXILIARY SELECTOR VALVE (Option)
20 PRESSURE REDUCING VALVE 435 PSI (3000 kPa)
6
HYDRAULIC FILTER ELEMENT 15 Micron
21 ACCUMULATOR
7
FILTER BY-PASS
22 PORT RELIEF VALVE Blade Cylinder (Base End) 3400 PSI (23442 kPa)
8
SWING MOTOR CROSS PORT RELIEF VALVE . . . . . . 1700 PSI (11721 kPa) When Tested 2150 PSI (14814 kPa)
9
50 PSI (344 kPa)
HYDRAULIC PUMP . Triple Section Variable Displacement Piston Pump Sections 1 & 2: 7.6 GPM (28,8 L/min.) Gear Pump Section 3: 8.8 GPM (33,3 L/min.)
10 TRAVEL MOTOR SPOOL - RIGHT HAND 11 TRAVEL MOTOR SPOOL - LEFT HAND 12
CHECK VALVE
13 PORT RELIEF VALVE Boom Cylinder (Rod End) 3400 PSI (23442 kPa) 14 PORT RELIEF VALVE Boom Cylinder (Base End) 2950 PSI (20340 kPa) 15 PORT RELIEF VALVE Bucket Cylinder (Rod End) 3400 PSI (23442 kPa)
Printed in U.S.A.
165 PSI (1138 kPa)
23 ORIFICE (Rod End) . . . .
0.082" (2.08 mm)
24 ORIFICE . . . . . . . . . . . . .
0.035" (0.88 mm)
25 HYDRAULIC FILTER ELEMENT 25 Micron 26 TEST PORT - "F" Port - Factory Fill Port 27 TEST PORT - "G" Port - Gauge Test Port 28 FILTER BY-PASS . . . .
20 PSI (138 kPa)
29 MAIN RELIEF VALVE 2800 PSI (19306 kPa) 30 MAIN RELIEF VALVE 2800 PSI (19306 kPa) 31 BUILD-UP VALVE
150 PSI (1034 kPa)
32 TEST PORT - "G1" Port - Pilot Pressure Test Port 33 ORIFICE (Base End)
0.107" (2.72 mm)
NOTE: Unless otherwise specified springs have NO significant pressure value. V-0063legend (8-8-02)