|Required Tools    |
|Tool    ||Part Number    ||Part Description    ||Qty    |
|A    ||138-7573    ||Link Bracket    ||2    |
|ZZ    ||6V-9508    ||Face Seal Plug    ||44    |
|6V-9829||Cap Assembly    ||44    |
|6V-9509||Face Seal Plug    ||6    |
|6V-9830||Cap Assembly    ||6    |
|6V-9510||Face Seal Plug    ||3    |
|6V-9831||Cap Assembly    ||3    |
|6V-9511||Face Seal Plug    ||13    |
|6V-9832||Cap Assembly    ||13    |
|6V-9512||Face Seal Plug    ||3    |
|6V-9833||Cap Assembly    ||3    |
- Release hydraulic system pressure. Refer to Disassembly and Assembly, "Hyrdraulic System Pressure - Release".
Note: SERVICE DATA: TOOLING (ZZ) WILL NOT BE IDENTIFIED IN PHOTOGRAPHS IN THE REMOVAL OR THE INSTALLATION. THIS TOOLING IS SHOWN IN ORDER TO ASSIST THE EXPERIENCED SERVICEMAN.
Note: A hydraulic oil sample should be obtained before any maintenance is performed in order to establish the system contaminant level. Refer to Operation and Maintenance Manual, "Sampling Interval and Location of Sampling Valve".
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, "AVSpare Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on AVSpare products.
Dispose of all fluids according to local regulations and mandates.
Keep all parts clean from contaminants.
Contamination of the hydraulic system with foreign material will reduce the service life of the hydraulic system components.
To prevent contaminants from entering the hydraulic system, always plug or cap the lines, fittings, or hoses as they are disconnected. Cover any disassembled components and clean them properly before assembly.
Clean the hydraulic system properly after any major component exchange or especially after a component failure, to remove any contamination.
At operating temperature the implement hydraulic oil tank is hot and under pressure. Hot oil can cause burns.
To prevent possible injury, release the pressure in the implement hydraulic system before hydraulic lines or components are disconnected or removed.
- Drain the oil from the hydraulic oil tank into a suitable container for storage or for disposal. Refer to Operation and Maintenance Manual, "Hydraulic System Oil - Change" for the procedure. The capacity of the hydraulic tank is approximately 105 L (27.7 US gal).
- Disconnect all of the hose assemblies and all of the tube assemblies from the top of the main control valve.
Note: Not all of the hoses need to be disconnected in order to remove the main control valve. Some of the hoses are routed from one location to another location on the main control valve.
Note: Put identification marks on all of the hose assemblies that are connected to the main control valve. Identification marks are for installation purposes and for the purpose of orientation during the installation procedure.
This view is from the top of the main control valve.
- Loosen the bolt and clip (2) that fastens tube assemblies (1) on the right hand frame.
- Remove the bolts and bracket (3). Slide tube assemblies (1) away from the main control valve.
- Remove sheet (4) for easier access to the main control valve.
- Disconnect harness assemblies (5) .
- Disconnect hose assemblies (7) from the main control valve.
- Remove bracket (6) and hose assemblies (7) from the main control valve.
- Remove the bolts and move check valve (8) away from the main control valve.
- Install Tooling (A) and a suitable lifting device onto the main control valve.
- Remove panel (9) that is located under the main control valve.
- Remove the remaining hydraulic hose assemblies from the bottom of the main control valve.
Note: The hydraulic hose assemblies that are located under the main control valve can be removed with the engine in chassis. However, the degree of difficulty will be greatly reduced for the installation of the hydraulic hose assemblies if the engine is removed.
The engine is removed in this side view of the hydraulic hose assemblies under the main control valve.
This view of the hydraulic hose assemblies under the main control valve is from the bottom of the machine.
- Remove bolts (10) .
Note: Carefully inspect the main control valve for any hydraulic hose assemblies or for any harness assemblies that must be disconnected prior to removal.
- Remove the main control valve from the machine. The weight of the main control valve is approximately 204 kg (450 lb).