320C & 320C L Excavators AMC00001-UP (MACHINE) POWERED BY...
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Product: EXCAVATOR
Model: 320C EXCAVATOR AMC01220
Configuration: 320C & 320C L Excavators AMC00001-UP (MACHINE) POWERED BY 3066 Engine
Testing and Adjusting
320C Excavator Hydraulic System
Media Number -RENR3817-11Publication Date -01/02/2010Date Updated -25/02/2010
i02615581
Specifications
SMCS - 5050
Illustration 1 g00721434
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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)
(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
Torque for Inspection
Relief Valve New Service Locknut Step
Rebuilt (2) Limit (3) Number (1)
(A) Main relief 34300 ± 500 115
valve kPa (4950 ± 75 32300 to 50 ± 10 N·m
psi) 34790 kPa
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(4700 to 5050 (37 ± 7 lb ft)
psi)
(B) Boom
cylinder line 138
(head end)
(C) Boom
cylinder line (rod 33850 to
end) 36800 ± 1470
38270 kPa
kPa (5350 ±
(D) Stick (5030 to 5540
215 psi)
cylinder line psi) 136
(head end) 20 ± 2 N·m
(14 ± 1 lb ft)
(E) Stick cylinder
134
line (rod end)
(F) Bucket
cylinder line 140
(head end) 33850 to
36800 ± 1470
38270 kPa
(G) Bucket kPa (5350 ±
(5030 to 5540
cylinder line (rod 215 psi) 142
psi)
end)
(H) Swing relief
pressure (right) 26000 ± 980 24040 to 147
117.6 ± 10
kPa (3750 ± 26980 kPa
N·m (85 ± 7
(I) Swing relief 140 psi) (3465 to 3890
lb ft) 145
pressure (left) psi)
(J) Left travel
crossover relief 36800 ± 1470 33850 to 130 ± 13
151
valve (forward) kPa (5350 ± 38270 kPa N·m (95 ±
215 psi) (4900 to 5550 10 lb ft)
psi)
(K) Left travel
crossover relief 154
valve (reverse)
(L) Right travel
crossover relief
157
valve (forward)
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(M) Right travel 160
crossover relief
valve (reverse)
(N) Pilot relief 49 ± 4.9 N·m
4100 ± 200 kPa (595 ± 30 psi) 50
valve (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
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)
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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) (3 217
revolutions)
18.5 (2)
Reverse travel HIGH (Left) (3
revolutions)
Forward travel LOW (Left) (3 30.0 (2)
revolutions)
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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)
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(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
Required Tools
Part Number Description Qty
9U-7400 Multitach Tool Group 1
8T-0470 Thermometer group 1
Table 5
Pressure change with One Turn of Adjustment
Relief Valves
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".
Sat Feb 10 23:41:21 UTC+0300 2024
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