HOSE AS 2441122 - Caterpillar

Introduction
This procedure will remove air from the brake system.Required Tools
Table 1
Required Tooling
Item Part Number Description Qty
F Transparent tube 6.4 mm (0.25 inch) in diameter 4
Suitable containers 4
G 177-7860(1) Hose As 1
H 6V-4143(1) Quick Connect Coupler 2
J 6V-3966(1) Fitting As 1
K 1S-8937(1) Needle Valve 1
(1) Assemble into a tool for purging the brakes.Connect each end hose assembly (G) to one quick connector coupling (H). Connect fitting assembly (J) to needle valve (K). Then connect quick connector coupling (H) to fitting assembly (J) that is attached to needle valve (K).
Table 2
Required Parts if Your Machine Has Plug (B) Installed in the Brake Housings
Callout Part Number Description Quantity
1 115-5411 Elbow 4
2 214-7568 O-Ring Seal 4
3 3K-0360 O-Ring Seal 4
4 6V-3965 Fitting 4
5 6V-0852 Dust Cap 4 Machine Preparation
Prepare the machine for testing by completing the procedure that is specified in the Service Manual module Troubleshooting, "Machine Preparation for Troubleshooting" for the machine that is being serviced.
Move the machine to a smooth, horizontal location. Move the machine away from other operating machines and away from personnel. Lower the bowl 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.
With the engine running at low idle hold the service brake pedal in the not fully ON position.
Illustration 1 g03359130
View of the rear right wheel
Parking brake air purge valve (1). Service brake air purge valve (2).
Fasten one end of a transparent tube (F) to each air purge valve. Place the other end of the tube into a suitable container for collecting the hydraulic oil.Service Brake Purge Procedure
Hold the end of tubing (F) in a suitable container.
With the engine running at low idle hold the service brake in PARTIALLY APPLIED position.
Open each service brake purge valve, one at a time until the stream of hydraulic oil is visually free of air.
Actuate the differential lock valve while the engine is at LOW IDLE. Then cycle the differential valve lock five times between the ON and the OFF. Wait 15 seconds between each cycle.
Refill the hydraulic tank to the full mark and replace the cap onto the hydraulic tank.
Check the hydraulic oil level and refill the hydraulic tank to the full mark as necessary. Then replace the cap onto the hydraulic tank.Parking Brake Purge Procedure
Note: Failure to follow the sequence as detailed in this procedure may result in inadequate purging of the parking brake
Verify that the parking brake control is in the ON position.
For machines with parking brake purge valves already installed, proceed to Step 6.
Illustration 2 g03106177
View of left front wheel station
Loosen the service brake purge valve (A) on the front left wheel and orient the service brake purge valve in a downward position.
Illustration 3 g03189057
Remove the plug from the parking brake