320C & 320C L Excavators BPR00001-UP (MACHINE) POWERED BY 3066 Engin...
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Shutdown SIS
Previous Screen
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Specifications
SMCS - 5050
Illustration 1 g00721434
Relief valve locations
(A) Main relief valve
(B) Boom cylinder line (head end)
(C) Boom cylinder line (rod end)
(D) Stick cylinder line (head end)
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320C & 320C L Excavators BPR00001-UP (MACHINE) POWERED BY 3066 Engin... Page 2 of 6
(E) Stick cylinder line (rod end)
(F) Bucket cylinder line (head end)
(G) Bucket cylinder line (rod end)
(H) Swing (right)
(I) Swing (left)
(J) Left travel crossover relief valve for forward travel (upper valve)
(K) Left travel crossover relief valve for reverse travel (lower valve)
(L) Right travel crossover relief valve for forward travel (upper valve)
(M) Right travel crossover relief valve for reverse travel (lower valve)
(N) Pilot relief valve
(O) Main control valve
(P) Pilot filter
(Q) Travel motor (right)
(R) Travel motor (left)
(S) Swing motor
Table 1
Specifications CHS Inspection
Torque for
Relief Valve New Step Number (1)
Service Limit (3) Locknut
Rebuilt (2)
34300 ± 500 kPa
(A) Main relief 50 ± 10 N·m
(4950 ± 75 psi) 32300 to 34790 kPa 115
valve (37 ± 7 lb ft)
(4700 to 5050 psi)
(B) Boom cylinder
138
line (head end)
(C) Boom cylinder
line (rod end) 36800 ± 1470
33850 to 38270 kPa
(D) Stick cylinder kPa (5350 ± 215
(5030 to 5540 psi) 20 ± 2 N·m 136
line (head end) psi)
(14 ± 1 lb ft)
(E) Stick cylinder
134
line (rod end)
(F) Bucket cylinder
140
line (head end)
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(G) Bucket 36800 ± 1470 33850 to 38270 kPa
cylinder line (rod kPa (5350 ± 215 (5030 to 5540 psi) 142
end) psi)
(H) Swing relief
147
pressure (right) 26000 ± 980 kPa 117.6 ± 10
24040 to 26980 kPa
(I) Swing relief (3750 ± 140 psi) N·m (85 ± 7
(3465 to 3890 psi) 145
pressure (left) lb ft)
(J) Left travel
crossover relief 151
valve (forward)
(K) Left travel
crossover relief 154
valve (reverse) 36800 ± 1470 130 ± 13 N·m
33850 to 38270 kPa
(L) Right travel kPa (5350 ± 215 (95 ± 10 lb ft)
(4900 to 5550 psi)
crossover relief psi) 157
valve (forward)
(M) Right travel
crossover relief 160
valve (reverse)
(N) Pilot relief 49 ± 4.9 N·m
50
valve 4100 ± 200 kPa (595 ± 30 psi) (36 ± 4 lb ft)
(1) Custom Hydraulic Service (CHS) is a preventive maintenance program for the machine hydraulic system. CHS is
also a valuable part of any Customer Support Agreement. Refer to Custom Hydraulic Service, REHS1780.
(2) A New specification is the performance that can be expected for a new machine. A "Rebuild" specification is the
performance that can be expected after rebuilding the components of a system.
(3) Performance beyond "Service Limit" specifications is an indication of the following problems: improper
adjustment , wear , damage of relief valves and damage of pumps.
Table 2
Cycle Times (seconds)
CHS Inspection Step
Function Factory
Number (1)
Boom EXTEND 2.8 ± 0.5 192
Boom RETRACT 1.9 ± 0.5
Stick EXTEND 3.2 ± 0.5 195
Stick RETRACT 2.4 ± 0.5 197
Bucket EXTEND 3.3 ± 0.5 199
Bucket RETRACT 1.8 ± 0.5 201
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320C & 320C L Excavators BPR00001-UP (MACHINE) POWERED BY 3066 Engin... Page 4 of 6
Swing LEFT (180°)
5.2 (2) 208
Swing RIGHT (180°)
Swing LEFT (90°) (12° slope)
4.2 (2)
Swing RIGHT (90°) (12° slope)
Overswing LEFT
1100 mm (47.2 209
Overswing RIGHT inch) (2)
Forward travel HIGH (
20 m (65 ft))
14.0 (2)
Reverse travel HIGH (
20 m (65 ft))
Forward travel LOW (
20 m (65 ft))
22.0 (2)
Reverse travel LOW (
20 m (65 ft))
Standard Undercarriage
Forward travel HIGH (Left) (3
revolutions)
17.0 (2)
Reverse travel HIGH (Left) (3
revolutions)
217
Forward travel LOW (Left) (3
revolutions)
27.5 (2)
Reverse travel LOW (Left) (3
revolutions)
Forward travel HIGH (Right) (3
revolutions)
17.0 (2)
Reverse travel HIGH (Right) (3
revolutions)
218
Forward travel LOW (Right) (3
revolutions)
27.5 (2)
Reverse travel LOW (Right) (3
revolutions)
Long Undercarriage
Forward travel HIGH (Left) (3
revolutions)
18.5 (2)
Reverse travel HIGH (Left) (3 217
revolutions)
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Forward travel LOW (Left) (3
revolutions)
30.0 (2)
Reverse travel LOW (Left) (3
revolutions)
Forward travel HIGH (Right) (3
revolutions)
18.5 (2)
Reverse travel HIGH (Right) (3
revolutions)
218
Forward travel LOW (Right) (3
revolutions)
30.0 (2)
Reverse travel LOW (Right) (3
revolutions)
(1) Custom Hydraulic Service (CHS) is a preventive maintenance program for the machine hydraulic system. CHS is
also a valuable part of any Customer Support Agreement. Refer to Custom Hydraulic Service, REHS1780.
(2) Maximum
(2) Maximum
Table 3
Cylinder Drift
Function Factory CHS Inspection Step Number (1)
Empty Bucket
Boom cylinder
6.0 mm (0.24 inch)
228
Stick cylinder
10.0 mm (0.39 inch)
Bucket cylinder 237
10.0 mm (0.39 inch)
Loaded Bucket
Boom cylinder
6.0 mm (0.24 inch)
Stick cylinder
12.0 mm (0.47 inch)
Bucket cylinder
18.0 mm (0.71 inch)
(1) Custom Hydraulic Service (CHS) is a preventive maintenance program for the machine hydraulic system. CHS is
also a valuable part of any Customer Support Agreement. Refer to Custom Hydraulic Service, REHS1780.
Table 4
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320C & 320C L Excavators BPR00001-UP (MACHINE) POWERED BY 3066 Engin... Page 6 of 6
Required Tools
Part Number Description Qty
9U-7400 Multitach Tool Group 1
8T-0470 Thermometer group 1
Table 5
Relief Valves Pressure change with One Turn of Adjustment Screw
Main valves
14400 kPa (2100 psi)
Line relief valve
11000 kPa (1600 psi)
Swing relief valve
6800 kPa (985 psi)
Travel crossover relief valve
3050 kPa (440 psi)
Pilot relief valve
620 kPa (90 psi)
Note: Pressure values in Table 6 are approximate values. Use a pressure gauge for adjustment.
Note: Normal operations of the engine and pumps are necessary for the pressure adjustments. If the
results of the pressure adjustment are not correct, then the engine and the pump characteristic curve
needs to be checked. Slow output flow from the pump is an indication of air in the hydraulic system.
Make sure that no air is present in the hydraulic system. Refer to Testing and Adjusting, "Main
Hydraulic Pump Air - Purge".
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