314D CR Hydraulic Excavator Machine Systems Caterpillar

Main Control Valve - Remove

Usage:

Removal Procedure

Show/hide table

Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	138-7575	Link Bracket	2

Start By:

Release the hydraulic system pressure. Refer to Disassembly and Assembly, "System Pressure - Release".

Show/hide table

NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat^® products. Dispose of all fluids according to local regulations and mandates.

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 hoses, on all hose assemblies, on all harness assemblies, and on all tube assemblies for installation purposes. Plug all hose assemblies and all tube assemblies. This helps to prevent fluid loss, and this helps to keep contaminants from entering the system.

Drain the hydraulic tank into a suitable container for storage or for disposal. Refer to Operation and Maintenance Manual, "Hydraulic System Oil - Change" for the proper procedure.
Show/hide table

Illustration 1 g01627746
Remove panel (1).
Show/hide table

Illustration 2 g01627748
Remove panel (3). Remove hand rail (2).
Show/hide table

Illustration 3 g01627751

Show/hide table

Illustration 4 g01627752
Remove panel (4). Remove tool box (5). Disconnect harness assembly (6). Disconnect hose (7).
Show/hide table

Illustration 5 g01627928
Disconnect harness assembly (8). Disconnect hose assemblies (9).
Show/hide table

Illustration 6 g01627929
Remove bracket assembly (10) and the valve assembly.
Show/hide table

Illustration 7 g01627930
Disconnect all hose assemblies (11) from the valve assembly. Disconnect harness assembly (13). Remove bracket (12) and the valve assembly. Position bracket (12) and the valve assembly out of the way.
Show/hide table

Illustration 8 g01627932
Remove bolts (14) and relocate valve assembly (15).
Show/hide table

Illustration 9 g01627933
Disconnect harness assembly (8). Cut all necessary tie straps that secure harness assembly (8).
Show/hide table

Illustration 10 g01627935
Remove step assembly (17). Remove nut (16).
Show/hide table

Illustration 11 g01627982
Disconnect harness assemblies (18). Remove flood lamp (19).
Show/hide table

Illustration 12 g01627983
Disconnect clamp (20). Disconnect harness assembly (8).
Show/hide table

Illustration 13 g01627984
Disconnect two harness assemblies (21) for the sending unit.
Show/hide table

Illustration 14 g01627986
Disconnect harness assembly (8). Cut all necessary tie straps that secure harness assembly (8). Remove bolts (23) and relocate the pilot valve and bracket (22).
Show/hide table

Illustration 15 g01628305
Remove bolts (26) and disconnect flange (25). Disconnect hose assembly (24).
Show/hide table

Illustration 16 g01628306
Remove U-bolt assembly (27). Loosen clamp (28). Remove tube assembly (29). Remove flange (30).
Show/hide table

Illustration 17 g01628307
Disconnect all hose assemblies (31) from the front of the main control valve.
Show/hide table

Illustration 18 g01628308
Disconnect all hose assemblies (32) from the side of the main control valve.
Show/hide table

Illustration 19 g01628309
Remove all hose assemblies (33) from the top of the main control valve.
Show/hide table

Illustration 20 g01628310

Note: Note the position and the routing of the hose assemblies before you remove plates (34).
Remove plates (34).
Show/hide table

Illustration 21 g01628311
Disconnect all hose assemblies (35) from the back side of the main control valve.
Show/hide table

Illustration 22 g01628312
Disconnect all hose assemblies (36) from the bottom of the main control valve.
Show/hide table

Illustration 23 g01628313
Disconnect three hose assemblies (37). Remove the bolts and relocated bracket (39) with the valve assembly. Remove the bolts and relocate bracket (38).
Show/hide table

Illustration 24 g01629697

Show/hide table

Illustration 25 g01629695
Attach Tooling (A) and a suitable lifting device to main control valve (40). The weight of main control valve (40) is approximately 190 kg (420 lb).
Remove four mounting bolts (41). Remove main control valve (40) from the machine.