337-341 Hydraulic Schematic v-0465legend-2

TWO SPEED SHIFT SPOOL
FLUSHING VALVE 360 PSI (2482 kPa)
CROSS PORT RELIEF VALVE
(Travel Motor) 3810 PSI (26250 kPa)
1
2
3
4
15
17
18
19
5
20
21
22
DIAGNOSTIC COUPLER (Pump)
23
RETURN PORT (Capped)
24
DIAGNOSTIC COUPLER (Build Up Valve)
25
TWO STAGE PILOT SPOOL
250 PSI (1724 kPa)
26
SHUTTLE (Dual Sequence Valve)
27
ANTI-CAVITATION VALVE
28
#20 MICRON DRAIN FILTER
With 25 PSI (172 kPa) By-Pass Valve
LOAD SENSE BLEED CARTRIDGE
0.185 GPM (0.70 L/min.)
LEGEND
ORIFICE, STRAIGHT TRAVEL
0.031 inch (0,80 mm)
AUXILIARY QUICK COUPLERS
LOAD SENSE RELIEF VALVE
DIAGNOSTIC COUPLER (Load Sense)
AUXILIARY DIRECT TO TANK (Optional)
ORIFICE (Offset Base)
0.108 inch (2,7 mm)
BUILD UP VALVE 105 PSI (724 kPa)
6
7
8
9
10
11
12
13
Printed in U.S.A.
14
PORT RELIEF VALVE (With
Anti-Cavitation Valve) - (Bucket Cylinder)
4200 PSI (28958 kPa)
29
ORIFICE, BRAKE - 0.030 inch (0,76 mm)
30
COUNTERBALANCE SPOOL (Travel Motor)
HYDRAULIC/HYDROSTATIC SCHEMATIC
337 AND 341 EXCAVATOR
337 (S/N 234611001 - 234611163)
341 (S/N 234711001 - 234711197)
(PRINTED June 2004)
V-0465legend
ORIFICE (Offset Rod)
0.083 inch (2,1 mm)
PORT RELIEF VALVE (With
Anti-Cavitation Valve) - (Bucket Cylinder)
4200 PSI (28958 kPa)
16
PORT RELIEF VALVE (With
Anti-Cavitation Valve) - (Arm Cylinder)
4200 PSI (28958 kPa)
PORT RELIEF VALVE (With
Anti-Cavitation Valve) - (Arm Cylinder)
4200 PSI (28958 kPa)
PORT RELIEF VALVE (With
Anti-Cavitation Valve) - (Boom Cylinder)
4200 PSI (28958 kPa)
PORT RELIEF VALVE (With
Anti-Cavitation Valve) - (Boom Cylinder)
4200 PSI (28958 kPa)
PORT RELIEF VALVE (With
Anti-Cavitation Valve) - (Auxiliary Return Port)
3000 PSI (20684 kPa)
PORT RELIEF VALVE (With
Anti-Cavitation Valve) - (Auxiliary Pressure Port)
3000 PSI (20684 kPa)
HYDRAULIC OIL TEMPERATURE SWITCH
224-234 Degrees F.
(107-112 Degrees C.)
1 of 2
Dealer Copy -- Not for Resale
33
50
SOLENOID VALVE - AUXILIARY FEMALE
COUPLER
V-0465legend (4-20-04)
NOTE: Unless otherwise specified
springs have NO significant
pressure value.
51
SOLENOID VALVE - AUXILIARY MALE
COUPLER
nch (0,76 mm)
41
TORQUE LIMITER SUPPLY SPOOL
With 0.031 inch (0,8 mm) Orifice
42
HYDRAULIC PISTON PUMP
Minimum Displacement
3.96 GPM (15 L/min.) at 2500 RPM
Maximum Displacement
47 GPM (177,9 L/min.) at 2500 RPM
46
COMPENSATOR - With Priority Slots
(Slew, Right Hand Travel and Left Hand Travel)
47
COMPENSATOR - Standard (Offset,
Blade, Bucket, Arm, Boom and Auxiliary)
48
SOLENOID SUPPLY - VARIABLE PILOT
SUPPLY
49
SOLENOID VALVE - TWO SPEED
PUMP PRESSURE PORT - (Capped)
34
PRESSURIZED BREATHER/FILL CAP
5 PSI (34,5 kPa) Outlet
0.435 PSI (3 kPa) Inlet
40 Micron Filter
35
CROSS PORT RELIEF VALVE - 2 stage
2800 PSI (19305 kPa)
36
PORT RELIEF VALVE (with
Anti-Cavitation Valve) (Blade Cylinder)
3750 PSI (25855 kPa)
37
PUMP MARGIN SPOOL
220 PSI (1516 kPa)
38
PRESSURE REDUCING VALVE
435 PSI (2999 kPa)
39
ACCUMULATOR
Nitrogen 165 PSI (1137,6 kPa)
Precharged
40
BRAKE RELEASE SPOOL
80 PSI (552 kPa)
31
#3 MICRON MAIN FILTER
With 50 PSI (345 kPa) By-Pass Valve
With Normally Closed Switch
32
HYDRAULIC RESERVOIR (PRESSURIZED)
with Fill Strainer
Reservoir Volume - 10 gal. (37,9 L)
Oil Volume - 6 gal. (22,7 L)
45
LOAD CHECK (Two per Section 14 Total)
Only 7 Shown
44
MINIMUM PUMP DISPLACEMENT
ADJUSTMENT 4.0 - 4.5 GPM
(15,14 - 17,03 L/min.)
n Port)
Anti-Cavitation Valve) - (Auxiliary Pressure Po
rt)
TURE SWITCH
rees C.)
43
TORQUE LIMITER
37 hp (27,6 kW) at 2500 RPM
LEGEND
HYDRAULIC/HYDROSTATIC SCHEMATIC
337 AND 341 EXCAVATOR
337 (S/N 234611001 - 234611163)
341 (S/N 234711001 - 234711197)
(PRINTED June 2004)
V-0465legend
2 of 2
Dealer Copy -- Not for Resale