WARNING !
At the operating temperature, the hydraulic tank is hot and under pressure. Hot oil can cause burns. To prevent possible injury, remove pressure in the hydraulic impulse circuit ( boom, stick, bucket, swing ), travel line, and oil fill cap in the hydraulic tank before all channels or hydraulic components are removed.
Remove the oil tank cap when the engine is off and the lid is cool enough to hold with bare hands.
WARNING !
A hydraulic cylinder equipped with a lock valve can hold the pressure for a long time even though the hose that connects it has been removed. Error in pressure discharge before removing the lock valve or disassembling the hydraulic cylinder can cause injury or death.
Make sure all pressure has been removed before removing the lock valve or disassembling the hydraulic cylinder.
Note: Cleanliness is a very important factor in improvement. Therefore, before carrying out the discharge process, the area around the component must be clean so that no contaminant enters the system.
Note: Put a mark (eg multiple lines using markers) on all channels, hose, cables, or pipes for future installation purposes. Cover all channels, hose, and pipes to prevent fluid discharge and contaminant entry into the system.
1. Position the bucket over the base and the appropriate blocking .
Figure 3.24 Step 1
2. Discard pressure in the hydraulic system. Look at Disassembly and Assembly , ” Hydraulic System Pressure-Release “.
3. Put the appropriate blocking under the bucket of the circle (1) .
Figure 3.25 Step 3
4. Remove the bolt (2) and the plate (3) .
Figure 3.26 Step 4
5. Install suitable lifting equipment on the bucket cylinder (4).
Figure 3.27 Step 5
6. Use suitable lifting equipment and equipment (A) to remove the assembly pin (5). The weight of the assembly pin (5) and equipment (A) is about 250 kg (550 lb) for the H-Family Bucket . The weight of the assembly pin (5) and equipment (A) is about 280 kg (615 lb) for the J-Family Bucket .
Figure 3.28 Step 6
Table 3.1 Equipment A
7. Remove the grease hose assembly (8) from the bucket cylinder (4) . Remove the bolt (9) from the assembly pin (7). Remove the hose assembly (6).
Figure 3.29 Step 7
8. Use suitable lifting apparatus and equipment (B) to remove the assembly pin (7). The weight of the assembly pin (7) and equipment (B) is about 127 kg (280 lb).
Figure 3.30 Step 8
Table 3.2 Equipment B
9. Remove the bucket cylinder (4). It weighs about 660 kg (1450 lb) for H-Family Bucket and 885 kg (1950 lb) for the J-Family Bucket .
Note: The machine may be equipped with a shim between the stick and the bucket cylinder on the joint pin . Put a mark (line) on the shim for indicates its location for the purpose of the installation process.
10. Remove the shim (if equipped) on stick pin joint .