- Excavator
- 320 (S/N: BR61-UP; KTN1-UP; ZBN1-UP; HEX1-UP)
- 323 (S/N: BR91-UP; YBL1-UP; RAZ1-UP)
Introduction
Do not perform any procedure in this Special Instruction until you have read the information and you understand the information.
Safety Section
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Do not operate or work on this machine unless you have read and understand the instructions and warnings in the Operation and Maintenance Manuals. Failure to follow the instructions or heed the warnings could result in injury or death. Contact your Cat dealer for replacement manuals. Proper care is your responsibility. |
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Personal injury or death can result from sudden work tool movement. Sudden movement of the work tool can cause injury to persons near the work tool. To prevent injury or death, make sure that the area around the work tool is clear of personnel and obstructions before operating the work tool. |
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Personal injury or death can result from improperly checking for a leak. Always use a board or cardboard when checking for a leak. Escaping air or fluid under pressure, even a pin-hole size leak, can penetrate body tissue causing serious injury, and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury. |
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Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact skin. |
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| Illustration 1 | g00104545 |
Prevent the machine from movement. Park the machine on a level surface.
Attach a "Do Not Operate" warning tag or a similar warning tag to the start switch or to the controls before you service the equipment. These warning tags (Special Instruction, SEHS7332) are available from your Caterpillar dealer.
General Information
Unless specified, tighten all fittings and hardware to standard torque.
Required Parts
| 489-2976 Front Lines Gp (- 05) | |||
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| Item | Qty | Part No. | Part Name |
| (1) | 1 | Tee As | |
| (2) | 1 | Support | |
| (3) | 1 | Support | |
| (4) | 1 | Support | |
| (5) | 2 | Elbow Fitting | |
| (6) | 1 | Solenoid and Relief Valve Gp | |
| (7) | 1 | Solenoid and Relief Valve Gp | |
| (8) | 1 | Block | |
| (9) | 1 | Block | |
| (10)(1) | 2 | Pressure Sensor Gp | |
| (11) | 1 | Hose As | |
| (12) | 4 | Cap | |
| (13) | 1 | Hose As | |
| (14) | 1 | Hose As | |
| (15) | 1 | Hose As | |
| (16) | 1 | Pipe As | |
| (17) | 1 | Block | |
| (18)(2) | 1 | Hose As | |
| (19) | 1 | Hose As | |
| (20) | 1 | Support | |
| (21)(3) | 2 | Locknut | |
| (22) | 4 | Bolt | |
| (23) | 4 | Bolt | |
| (24) | 4 | Bolt | |
| (25) | 4 | Bolt | |
| (26) | 2 | Adapter As | |
| (27) | 1 | Elbow As | |
| (28) | 1 | Elbow As | |
| (29) | 4 | Rectangular Seal | |
| (30) | 1 | Rectangular Seal | |
| (31) | 1 | Rectangular Seal | |
| (32) | 2 | Half Flange | |
| (33) | 6 | Half Flange | |
| (34) | 1 | O-Ring Seal | |
| (35) | 5 | O-Ring Seal | |
| (36) | 1 | U-Bolt | |
| (37) | 40 | Hard Washer | |
| (38) | 6 | Bolt | |
| (39) | 16 | Bolt | |
| (40) | 16 | Bolt | |
| (41) | 10 | Hard Washer | |
| (42) | 10 | Bolt | |
| (43) | 8 | Half Flange | |
| (1) | |
| (2) | |
| (3) | |
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| Illustration 2 | g06230814 |
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Overview of the | |
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| Illustration 3 | g06231127 |
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Overview of the | |
Installation Procedure
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| Illustration 4 | g06231909 |
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(3) (16) (21) (22) (33) (35) (36) (37) (38) (40) | |
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| Illustration 5 | g06231258 |
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(2) (4) (5) (6) (7) (10) (20) (26) (32) (37) (38) (39) (40) (41) (42) (43) | |
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| Illustration 6 | g06231611 |
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(1) (6) (7) (12) (37) (39) (41) (42) (43) | |
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| Illustration 7 | g06231679 |
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(1) (13) (14) (15) (18) (19) (28) (29) (33) (35) (37) (40) | |
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| Illustration 8 | g06231681 |
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Valve group support is removed to show port locations. (1) (11) (14) (17) (19) (24) (27) (29) (30) (32) (33) (34) (35) (37) (40) | |
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| Illustration 9 | g00687600 |