PLATE 1255148 - Caterpillar

Start By:
Release the hydraulic system pressure. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release".
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.
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Remove bolts (2) in order to remove access cover (1) that is under the main control valve.
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Remove the cap from the hydraulic tank. Install Tooling (A) onto the hydraulic tank. Attach an air supply hose to Tooling (A). Apply 276 to 414 kPa (40 to 60 psi) of air. This procedure will pull vacuum on the hydraulic system. Note: A small amount of oil will drain from all of the hose assemblies when the hose assemblies are disconnected from the pilot manifold. Make sure that you contain the hydraulic oil.
Put identification marks on all of the hose assemblies that are connected to the pilot manifold for installation purposes.
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Disconnect harness assemblies (3) from control manifold (5).
Disconnect hose assembly (4). Note: Leave the top hose assembly connected. You will be able to remove the top hose assembly, when the mount bolts are removed.
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Remove bolts (6).
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Disconnect hose assembly (7) and remove control manifold (5). Installation Procedure
Table 2
Required Tools
Tool Part Number Part Description Qty
A FT-2674 Vacuum Cap 1
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Remove the cap from the hydraulic tank. Install Tooling (A) onto the hydraulic tank. Attach an air supply hose to Tooling (A). Apply 276 to 414 kPa (40 to 60 psi) of air. This procedure will pull vacuum on the hydraulic system.
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Position control manifold (5) and connect hose assembly (7).
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Install bolts (6).
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Connect hose assemblies (4). Note: A small amount of oil will drain from all of the hose assemblies when the plugs are removed from the hose assemblies. Make sure that you contain the hydraulic oil.
Connect harness assemblies (3) to control manifold (5).
Remove Tooling (A) and install the cap to the hydraulic tank.
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Position access cover (1) and install bolts (2) that are under the main control valve.