422E, 428E, 432E, 434E, 442E and 444E Backhoe Loaders Machine Systems Caterpillar

Removal Procedure

Start By:

1. Remove the bucket. Refer to Disassembly and Assembly, "Bucket - Remove and Install".

Show/hide table

Cylinders equipped with lock valves can remain pressurized for very long periods of time, even with the hoses removed. Failure to relieve pressure before removing a lock valve or disassembling a cylinder can result in personal injury or death. Ensure all pressure is relieved before removing a lock valve or disassembling a cylinder.

Show/hide table

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.

Note: Put identification marks on all lines, on all hoses, on all wires, and on all tubes for installation purposes. Plug all lines, hoses, and tubes. This helps to prevent fluid loss and this helps to keep contaminants from entering the system.

Show/hide table



Illustration 1	g01675075

Note: Position suitable cribbing under the tilt cylinder.

1. Position coupler assembly (3), as shown. Release system hydraulic pressure. Refer to Disassembly and Assembly, "System Pressure - Release".

2. Disconnect hose assemblies (1) and clips (5). Remove cover (2). Disconnect harness assembly (4) .

3. Use Tooling (A) in order to remove the retaining rings. Remove the retaining rings, the washers, and pin (6). Repeat for the opposite side.

4. Remove the bolts, the washers, and pin assembly (7). Repeat for the opposite side.

5. Remove quick coupler (3). The weight of quick coupler (3) is approximately 210 kg (463 lb).

Show/hide table



Illustration 2	g01675077

6. Disconnect hose assemblies (8). Remove bolts (10). Remove cover assembly and control valve assembly (9) .

Show/hide table



Illustration 3	g01675078

7. Remove elbows (11) from control valve (12). Remove bolts (13) and control valve (12) .

Show/hide table



Illustration 4	g01675093

8. Disconnect hose assemblies (17). Remove dowel (14), pin (15), and cylinder assembly (16) .

Installation Procedure

Show/hide table



Illustration 5	g01675093

1. Position cylinder assembly (16) and install pin (15). Install dowel (14). Connect hose assemblies (17) .

Show/hide table



Illustration 6	g01675078

2. Position control valve (12) and install bolts (13). tighten bolts (13) to a torque of 14 ± 3 N·m (125 ± 27 lb in). Install elbows (11) onto control valve (12) .

Show/hide table



Illustration 7	g01675077

3. Position cover assembly and control valve assembly (9). Remove bolts (10). Connect hose assemblies (8) .

Show/hide table



Illustration 8	g01675075

Note: Position suitable cribbing under the tilt cylinder.

4. Position quick coupler (3). The weight of quick coupler (3) is approximately 210 kg (463 lb). Align the bores of lift arm with the bores on quick coupler (3) .

Note: Use the washers in order to obtain a gap of 1.00 ± 1.00 mm (0.039 ± 0.039 inch). Use an equal amount of the washers on each side to center quick coupler (3) on the lift arms.

5. Install pin assembly (7) and the washers. Install the bolt. Repeat for the opposite side.

Note: Use the washers in order to obtain a gap of 1.00 ± 0.50 mm (0.039 ± 0.020 inch).

6. Align the bores of the link assembly with the bore on quick coupler (3). Install pin (6) and the washers. Use Tooling (A) in order to install the retaining rings.

7. Connect harness assembly (4). Install cover (2). Connect hose assemblies (1) and clips (5) .

End By: Install the bucket. Refer to Disassembly and Assembly, "Bucket - Remove and Install".