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Section 2 Structure and Function: Group 1 Hydraulic Circuit Diagram

This document contains hydraulic circuit diagrams for different machine serial numbers. The diagrams show the components and connections of the hydraulic system, including the main pump, control valves, cylinders, motors, filters, accumulator, and other elements. The components and some connections differ between the diagrams for machines produced before and after certain serial numbers.

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Jet Acosta
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210 views3 pages

Section 2 Structure and Function: Group 1 Hydraulic Circuit Diagram

This document contains hydraulic circuit diagrams for different machine serial numbers. The diagrams show the components and connections of the hydraulic system, including the main pump, control valves, cylinders, motors, filters, accumulator, and other elements. The components and some connections differ between the diagrams for machines produced before and after certain serial numbers.

Uploaded by

Jet Acosta
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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SECTION 2 STRUCTURE AND FUNCTION

GROUP 1 HYDRAULIC CIRCUIT DIAGRAM


・ Machine serial No : up to #374, except #294, 315 and 355 ~ 362.

R55NM2SF11A

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・ Machine serial No : #375 and up to #0616, include #294, #315 and 355~362.

1 Main pump
2 Main control valve
3 RCV lever(LH)
4 RCV lever(RH)
6 Travel motor
7 Swing motor
9 Shuttle valve
10 Turning joint
11 Check valve
12 Check valve
13 Check valve
14 Dozer cylinder
15 Arm cylinder
16 Boom cylinder
17 Bucket cylinder
18 Hyd oil cooler
19 Return element
20 Suction strainer
21 Air breather
22 Last guard filter
23 Filter-line
24 Boom swing cylinder
26 Accumulator
29 Solenoid valve
R55NM2SF12 30 Stop valve

2-2
・ Machine serial No : #0617 and up

1 Main pump
2 Main control valve
3 RCV lever(LH)
4 RCV lever(RH)
5 RCV dozer3
6 Travel motor
7 Swing motor
9 Shuttle valve
10 Turning joint
11 Check valve
12 Check valve
13 Check valve
14 Dozer cylinder
15 Arm cylinder
16 Boom cylinder
17 Bucket cylinder
18 Hyd oil cooler
19 Return element
20 Suction strainer
21 Air breather
22 Last guard filter
23 Line filter
24 Boom swing cylinder
25 Aux. control valve
26 Accumulator
R55NM2SF13
28 Pressure switch
29 Solenoid valve
30 Stop valve

2-3

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