- Excavator
- 318D2 (S/N: JEB1-UP; HAH1-UP; XAH1-UP; HBP1-UP)
- Hydraulic Kit
- HYDRAULIC KIT (S/N: HKD1-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 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 work tools have been lowered to the ground, and the 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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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 Cat dealer.
Required Parts
| 478-3085 Front Lines Gp Revision -00 | |||
|---|---|---|---|
| Item | Qty | Part No. | Description |
| (1) | 4 | Marker Band (Red) | |
| (2) | 4 | Marker Band (Yellow) | |
| (3) | 12 | Cable Strap | |
| (4) | 2 | Guard | |
| (5) | 1 | Tee As | |
| (6) | 3 | Tee As | |
| (7) | 2 | Elbow As | |
| (8) | 1 | Hose As | |
| (9) | 1 | Hose As | |
| (10) | 1 | Fitting As | |
| (11) | 1 | Pressure Switch | |
| (12) | 2 | Solenoid Valve and Manifold Gp | |
| (13) | 1 | Grommet | |
| (14) | 1 | Hose As | |
| (15) | 1 | Pressure Sensor Gp | |
| (16) | 1 | Hose As | |
| (17) | 1 | Hose As | |
| (18) | 1 | Hose As | |
| (19) | 1 | Check Valve Gp | |
| (20) | 1 | Hose As | |
| (21) | 2 | Spacer | |
| (22) | 1 | Support As | |
| (23) | 1 | Hose As | |
| (24) | 1 | Hose As | |
| (25) | 1 | Adapter As | |
| (26) | 1 | Adapter As | |
| (27) | 1 | Connector As | |
| (28) | 1 | Connector As | |
| (29) | 7 | Elbow As | |
| (30) | 2 | Plug As | |
| (31) | 2 | Reducer As | |
| (32) | 3 | Elbow As | |
| (33) | 1 | Quick Disconnect Coupler As | |
| (34) | 1 | Elbow As | |
| (35) | 1 | Dust Cap | |
| (36) | 4 | Hard Washer | |
| (37) | 2 | Bolt | |
| (38) | 2 | Bolt | |
| (39) | 3 | Hard Washer | |
| (40) | 3 | Bolt | |
| Standard Removal | |||
| (-) | 3 | Bolt As | |
| (-) | 1 | Elbow As | |
| (-) | 1 | Hose As | |
| (-) | 1 | Connector As | |
| (-) | 1 | Plug As | |
| (-) | 1 | Quick Disconnect Coupler As | |
| (-) | 1 | Dust Cap | |
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| Illustration 2 | g06039292 |
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Hose Connection Table
| Port Name | Band Color | Hose No. | Port Name | ||
|---|---|---|---|---|---|
| Pilot Check Valve | "S1" | Yellow | (17) |
Boom | - |
| "P1" | Red | (18) |
- | ||
| Control Valve | "BL4" | - | (8) |
- | |
| Quick Coupler Unlock Solenoid | "P" | - | (20) |
Pump | "M3" |
| "C1" | - | (9) |
Quick Coupler Hold To Run Solenoid | "P" | |
| Quick Coupler Hold To Run Solenoid | "C1" | - | (14) |
Pilot Check Valve | "P2" |
| Quick Coupler Unlock Solenoid | "C2" | - | (23) |
"S2" | |
| Quick Coupler Hold to Run Solenoid | "T" | - | (16) |
Drain Tube | - |
| Quick Coupler Unlock Solenoid | "T" | - | (24) |
- | |
Installation Procedure
- Assemble the components of valve assembly (A).
Show/hide table
Illustration 4 g06039603 (1) 4I-9521 Marker Band (Red)
(2)4I-9522 Marker Band (Yellow)
(6)168-1968 Tee As
(7)241-6215 Elbow As
(17)361-8914 Hose As
(18)376-6280 Hose As
(20)456-4661 Hose As
(24)496-6519 Hose As
(26)148-8313 Adapter As
(29)148-8378 Elbow As
(33)164-5567 Quick Disconnect Coupler As
(35)6V-0852 Dust Cap - Install valve assembly (A) into the pump compartment.
- Connect hose (20) to port "M3" of the main pump and port "P" of the Quick Coupler Unlock Solenoid.
- Connect hoses (16) and (24) to the drain tube and port "T" of the Quick Coupler Hold To Run Solenoid and the Quick Coupler Unlock Solenoid.
- Connect hose (18) to port "P1" of the Pilot Check Valve.
- Connect hose (17) to port "S1" of the Pilot Check Valve.
Show/hide table
Illustration 5 g06039632 (1) 4I-9521 Marker Band (Red)
(2)4I-9522 Marker Band (Yellow)
(3)7K-1181 Cable Strap
(4)104-8903 Guard
(5)148-8440 Tee As
(6)168-1968 Tee As
(8)272-4499 Hose As
(11)319-4407 Pressure Switch
(13)337-2709 Grommet
(15)338-6971 Pressure Sensor Gp
(17)361-8914 Hose As
(18)376-6280 Hose As
(25)148-8310 Adapter As
(31)148-8415 Reducer As
(34)169-5862 Elbow As - Connect hose (8) with pressure sensor (15) to port "BL4" of the main control valve.
- Connect pressure switch (11) to port "bL4" of the main control valve.
- Unless specified, tighten all fittings and hardware to standard torque.
Show/hide table
Illustration 6 g00687600 - Check for leaks
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| Illustration 3 | g06039692 |
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Valve Assembly (A) ( 7) (9) (10) (12) (14) (19) (21) (22) (23) (27) (28) (29) (30) (32) (36) (37) (38) (39) (40) | |
