|Required Tools    |
|Tool    ||Part Number    ||Part Description    ||Qty    |
|ZZ    ||6V-9509    ||Face Seal Plug    ||2    |
|6V-9508||Face Seal Plug    ||5    |
- Release the hydraulic system pressure. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release".
Note: SERVICE DATA: TOOLING (ZZ) WILL NOT BE IDENTIFIED IN PHOTOGRAPHS IN THE REMOVAL OR IN THE INSTALLATION. THIS TOOLING IS SHOWN IN ORDER TO ASSIST THE EXPERIENCED SERVICEMAN.
Note: Put identification marks on all hose assemblies for installation purposes. Plug all hose assemblies, and cap all fittings. This helps prevent fluid loss, and this helps to keep contaminants from entering the system.
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.
Contaminants may cause rapid wear and shortened component life.
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.
- Open the left, rear door (1) in order to access the alternate pattern control valve.
- Eight hose assemblies (2) are connected to the alternate pattern control valve (3). Identify the location of each hose assembly on the alternate pattern control valve. Disconnect hose assemblies (2) .
- Remove bolts (4) and remove alternate pattern control valve (3) .