HOSE A 6G4523 - Caterpillar

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.
Personal injury can result from improper troubleshooting and repair procedures.The following troubleshooting and repair procedures should only be performed by qualified personnel familiar with this equipment.
Do not attempt to disassemble or assemble this machine until you read and understand the disassembly and assembly instructions. Improper disassembly and assembly procedures could result in injury or death.
Personal injury can result from contact with hot hydraulic oil and from contact with hydraulic oil that is under high pressure.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. The hydraulic oil pressure must be released before any service on the hydraulic system is performed or serious personal injury could occur.Verify that all of the work tools have been completely lowered to the ground. Release the hydraulic oil pressure at the hydraulic tank through the breaker relief valve when the breaker relief valve is cool enough to touch with your bare hand. Verify that the hydraulic oil is cool before you begin to remove any hydraulic components or hydraulic lines.
Before service work is begun, park the machine on a hard level surface. Block the wheels of the machine so unexpected movement will not occur. Unexpected movement of the machine can cause personal injury or death.
Introduction
This procedure will remove air from the brake system.Required Tools
Table 1
Required Tooling
Item Part Number Description Qty
F Suitable containers 4
G 177-7860(1) Hose As 4
H 6V-4143(1) Quick Connect Coupler 4
J 6V-3966 Fitting As 4
(1) Assemble into a tool for purging the brakes.Connect one end of each hose assembly (G) to one quick connector coupling (H).Test Preparation
Before you begin this procedure, refer to Testing and Adjusting, "Machine Preparation".
Move the machine to a smooth, horizontal location. Move the machine away from other operating machines and away from personnel. Lower the work tools to the ground and move the parking brake switch to the on ON position. Place chocks in front of the wheels and behind the wheels.
Check the hydraulic tank oil level. Make sure that you maintain the correct oil level in the hydraulic oil tank throughout the air removal procedure.
Illustration 1 g03668980
View of wheel station with guard installed
Remove the top guard (K) that protects the plumbing at each rear wheel station
Hook up the kidney loop system
Illustration 2 g03668982
View of wheel station with guard removed
Remove all four purge screws (L) and install four fittings (J)
Attach four black purge hose assemblies that were built previously to fittings (J). Place the other end of the black purge hoses into the hydraulic tank. Perform the Process
Start the engine and allow the accumulators to charge completely. Then shut