- Excavator
- 325F (S/N: XAA1-UP; YCA1-UP)
- Hydraulic Control
- HYDRAULIC KIT (S/N: HKF1-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 can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the attachments have been lowered, oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand. |
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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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Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products. Dispose of all fluids according to local regulations and mandates. |
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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 before you service the equipment . These warning tags (Special Instruction, SEHS7332) are available from your AVSpare dealer.
Required Parts
| Parts List for 451-7525 Pilot Lines Gp Revision -03 | |||
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| Item | Qty | Pt. No. | Part Name |
| (1) | 2 | Cable Strap | |
| (2) | 1 | Tee As | |
| (3) | 2 | Hose As | |
| (4) | 1 | Solenoid Valve Gp | |
| (5) | 1 | Hose As | |
| (6) | 1 | Adapter As | |
| (7) | 1 | Support As | |
| (8) | 1 | Hose As | |
| (9) | 2 | Connector As | |
| (10) | 2 | Elbow As | |
| (11) | 2 | Elbow As | |
| (12) | 2 | Plug As | |
| (13) | 1 | Tee As | |
| (14) | 1 | Tee As | |
| (15) | 2 | Quick Disconnect Coupler As | |
| (16) | 1 | Elbow Fitting | |
| (17) | 2 | Dust Cap | |
| (18) | 2 | Hard Washer | |
| (19) | 2 | Bolt | |
| (20) | 2 | Hard Washer | |
| (21) | 2 | Bolt | |
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| Illustration 2 | g06028858 |
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Installation Procedure
- Assemble the components of valve assembly (A).
Show/hide table
Illustration 4 g06028879 (5) 289-5474 Hose As
(8)486-4072 Hose As
(9)148-8338 Connector As - Install valve group (A) to the frame.
- Connect hose (8) to port "A2" of valve assembly (A) and port "Pb1" of the control valve.
Show/hide table
Illustration 5 g06028926 (3) 218-1061 Hose As
(5)289-5474 Hose As
(10)148-8353 Elbow As - Connect blue hose (3) to port "P" of valve assembly (A).
- Connect white hose (3) to port "T" of valve assembly (A).
- Connect hose (5) to port "Pa1" of the control valve.
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| Illustration 3 | g06028899 |
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Valve Assembly (A) ( 4) (6) (7) (10) (12) (13) (14) (15) (16) (17) (18) (19) (20) (21) | |
- Connect blue hose (3) to port "PSA1" of the pilot manifold at the rear of the main control valve.
- Connect white hose (3) to port "DR1" of the pilot manifold at the rear of the main control valve.
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| Illustration 6 | g06028938 |
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(2) (3) (9) (11) | |