- Excavator
- 307D (S/N: DSG1-UP; ECT1-UP)
- Mini Hydraulic Excavator
- 308D (S/N: HSA1-UP; FYC1-UP; JPS1-UP; GBT1-UP)
Introduction
Use the information that follows and install an anti-drift valve if your machine has blade drift or your machine requires zero blade drift.
Safety
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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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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. |
Required Parts
The parts that are listed in Table 1 are required for the procedure that follows.
| Item | Part Number | Part Name | Qty | Notes |
| 1 | Pilot Valve Gp | 1 | Anti Blade Drift Valve | |
| 2 | Connector | 2 | For Pilot Line to Valve Gp | |
| 3 | O-Ring Seal | 2 | STOR O-ring for 6V-9872 Connector | |
| 4 | O-Ring Seal | 4 | ORFS O-ring for 6V-9872 Connector | |
| 5 | Elbow | 2 | To Valve Group ports | |
| 6 | O-Ring Seal | 2 | STOR O-ring for 3E-7408 Elbow | |
| 7 | O-Ring Seal | 3 | ORFS O-ring for 3E-7408 Elbow | |
| 8 | Bolt | 2 | Bolt M8 x 1.25 for Valve Mount | |
| 9 | Nut | 2 | Nut M8 x 1.25 for Valve Mount | |
| 10 | Hard Washer | 2 | For Valve Mount | |
| 11 | Hose between C/V and Valve | 1 | ORFS 495mm Length Straight 90 degree | |
| 12 | Hose for Blade Pilot | 1 | ORFS 740mm Length Straight - Straight | |
| 13 | Swivel Tee | 1 | For blade spool Second Pressure | |
| 14 | Hose for Blade Drain | 1 | ORFS 1110mm Length Straight 90 degree | |
| 15 | Mount Bracket | 1 | For Anti Blade Drift Valve Mount |
Installation Procedure for the Anti Drift Valve
- Rotate the machine 90 degrees to the right.
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Illustration 1 g02649083 - Remove the side access panel as shown in Illustration 1.
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Illustration 2 g02649616 - If available, remove the bottom plate as shown in Illustration 2.
Note: Not all machines are equipped with the bottom plate.
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Illustration 3 g02649656 Show/hide table
Illustration 4 g03703222 - Illustrations 3 and 4 show the details of the anti drift valve (1) for the blade.
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Illustration 5 g02649716 - Disconnect Hose (2) and connect to the B port (shown in Illustration 3 of the anti drift valve (1).
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Illustration 6 g02649760 - Install one end of hose (11) as shown in Illustration 6.
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Illustration 7 g02649764 - Install the other end of hose (11) to the A port of anti drift valve (1) as shown in Illustration 7
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Illustration 8 g02649766 - Install the Tee (13) as shown in illustration 8
- Install one end of hose (12).
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Illustration 9 g02649818 - Install the other end of hose (12) to the PL port of the anti drift valve.
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Illustration 10 g02649836 - Install the 90 degree side of hose (14).
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Illustration 11 g02649837 - Install the other end of hose (14) to the DR port of the anti drift valve.
Schematic
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| Illustration 12 | g02684638 |