308C CR Excavator Hydraulic System – Control Manifold (Pilot Oil) – Assemble

Assembly Procedure

Note: Check the O-ring seals for wear or for damage. Replace the O-ring seals, if necessary.

Note: Cleanliness is an important factor. Before assembly, thoroughly clean all parts in cleaning fluid. Allow the parts to air dry. Do not use wiping cloths or rags to dry parts. Lint may be deposited on the parts which may cause trouble. Inspect all parts. If any parts are worn or damaged, use new parts for replacement. Dirt and other contaminants can damage the precision component. Perform assembly procedures on a clean work surface. Keep components covered and protected at all times.




    Illustration 1 g00890052

  1. Install the O-ring seals on plugs (22) and install the plugs in the manifold. Tighten plugs (22) to a torque of 5 ± 1 N·m (44 ± 9 lb in).
  1. Install the O-ring seals on fittings (23) and install the fittings in the manifold.



    Illustration 2 g00890036

  1. Install the O-ring seals on plugs (21) and install the plugs in the manifold. Tighten plugs (21) to a torque of 5 ± 1 N·m (44 ± 9 lb in).
  1. Install the O-ring seal on fitting (20) and install the fitting in the manifold.



    Illustration 3 g00889994


    ------ WARNING! ------

    Improper assembly of parts that are spring loaded can cause bodily injury.

    To prevent possible injury, follow the established assembly procedure and wear protective equipment.

    ----------------------






    Illustration 4 g00889922

  1. Install O-ring seal (19) on plug (16) . Install valve (17) and spring (18) in the manifold.
  1. Install plug (16) . Tighten plug (16) to a torque of 49 ± 5 N·m (36 ± 4 lb ft).
  1. Install the O-ring seals on plugs (15A) and install plugs (15A) in the manifold.
  1. Install the O-ring seal on plug (15) and install plug (15) in the manifold. Tighten plug (15) to a torque of 31 ± 3 N·m (23 ± 2 lb ft).



    Illustration 5 g00889898

  1. Install the O-ring seals on fittings (14) and install fittings (14) in the manifold.



    Illustration 6 g00889833


    ------ WARNING! ------

    Improper assembly of parts that are spring loaded can cause bodily injury.

    To prevent possible injury, follow the established assembly procedure and wear protective equipment.

    ----------------------






    Illustration 7 g00889824

  1. Install O-ring seal (13) on plug (9) . Install spring (11) and valve (12) in the manifold.
  1. Install plug (9) . Tighten plug (9) to a torque of 31 ± 3 N·m (23 ± 2 lb ft).
  1. Install the O-ring seal on fitting (10) and install fitting (10) in the manifold.



    Illustration 8 g00889798

  1. Install valves (8) in the manifold.



    Illustration 9 g00889491

    Plates (7) and plungers (6) are nonserviceable.

  1. Install O-ring seals (5) on plungers (6) .
  1. Install plungers (6) and plates (7) in solenoid assemblies (4) .



    Illustration 10 g00889457

  1. Install solenoid assemblies (4) with hex head bolts (3) . Tighten hex head bolts (3) to a torque of 4 ± 1 N·m (35 ± 9 lb in).
  1. Position accumulator (1) for installation and tighten nut (2) .

End By:
Install the control manifold. Refer to Disassembly and Assembly, “Control Manifold (Pilot Valve) – Install”.