Usage:
Introduction
Installation of 5C2578 or 8K3570 Blocking Plates upstream (toward the oil supply) from a hydraulic leak, a broken tube or a broken hose, permits the excavator to be moved for repairs.
Use the 8K4707 Blocking Plates to prevent the loss of oil from the hydraulic tank, when the hydraulic system must be disassembled for reasons other than a hydraulic system failure.
Reference: Service Manual and Parts Book.
Application Chart
The following chart lists the blocking plates and the machines they are used with.
Installation of 5C2578, 8K3570 and 4V9384 Blocking Plate Groups
1. Lower the bucket to the ground.
- * Stop the engine.* Clean the areas where the blocking plates will be installed* Remove the cap from the hydraulic tank to release the pressure in the tank.* Refer to the Service Manual for installation of 5P0306 Transducer
| NOTICE |
|---|
Do not install the blocking plates in the track circuit, or in the lines between the pump and the control valves. Do not activate the controls for any circuit in which a blocking plate has been installed. |
2. Remove bolts (1) and install new bolts which are 8 mm (.31") longer than the bolts that were removed.
3. Install the correct size blocking plate for the size of line being blocked. Be careful not to damage the O-ring seal.
4. Remove the blocking and install the original bolts after the repairs are made.
Installation of 8K4707 Blocking Plate Group
1. Lower the bucket to the ground.
- * Stop the engine.* Clean the areas where the blocking plates will be installed* Remove the cap from the hydraulic tank to release the pressure in the tank.* Refer to the Service Manual for installation of 5P0306 Transducer
2. Remove two bolts (1).
3. Loosen two bolts (2) enough to slide the correct size blocking plate into position. Be careful not to damage the O-ring seal.
4. Slide blocking plate (3) into position until contact is made with bolts (2). Tighten bolts (2) and install bolts (1).