312C Excavator Machine Systems Caterpillar

Installation Procedure

Note: Cleanliness is an important factor. Before assembly, all parts should be thoroughly cleaned in cleaning fluid. Allow the parts to air dry. Wiping cloths or rags should not be used to dry parts. Lint may be deposited on the parts which may cause future trouble. Inspect all parts. If any parts are worn or damaged, use new parts for replacement. Dirt and other contaminants can damage the precision components of the pump or of the motor. All disassembly and all assembly procedures must be performed on a clean work surface and in a clean hydraulic area. Keep cleaned parts covered and protected at all times.

Show/hide table



Illustration 1	g00846341

1. Install new O-ring seals (12) on each solenoid valve group.

Show/hide table



Illustration 2	g00846339

2. Install both of the solenoid valve groups in the body. Make sure that each solenoid valve group is installed in the original location which was marked prior to disassembly. Install bolts (11) in order to secure each solenoid valve group. Tighten bolt (11) to a torque of 6.9 ± 0.7 N·m (61 ± 6 lb in).

3. Connect harness assemblies (10) to the solenoid valve groups. Make sure that each harness assembly is connected in the original location that was marked prior to disassembly.

Show/hide table



Illustration 3	g00846129

4. Install the solenoid valve group (2). Secure the solenoid valve group with bolts (9) .

Show/hide table



Illustration 4	g00985690

5. Connect hose assemblies (8), (7), and (6) to the original locations on the bottom of the solenoid valve group. The locations were marked prior to disassembly. Connect hose assemblies (5), (4), and (3) to the original locations on the side of the solenoid valve group. The locations were marked prior to disassembly.

Show/hide table



Illustration 5	g00846128

6. Install hood cover (1) near solenoid valve (2) .