| Required Tools | ||
|---|---|---|
| Part Number | Description | Required Amount |
| 6V-4144 | Quick Connect Coupler | 1 |
| 235-7104 | Hose As | 2 |
| 1S-8937 | Needle Valve | 1 |
There are quick disconnects for the hydraulic brakes on each rear wheel. Before you purge air from the oil in the system, the brake system accumulators must be fully charged.
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Personal injury or death can result from air in the oil for the brake hydraulic system. Air in the system can prevent complete brake application and it is possible that the wheels on the machine can not be stopped. Air must not be in the oil for the brake hydraulic system to function properly. |
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Personal injury or death can result from machine movement. Place blocks in front of and behind the wheels to make sure the machine does not move while the parking brakes are disengaged. |
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| NOTICE |
|---|
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 Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on AVSpare products. Dispose of all fluids according to local regulations and mandates. |
Note: Purge only one wheel at a time.
Service Brakes and Retarder
Rear Brakes
- Assemble the following in order to construct a purge hose assembly: one 6V-4144 Coupler, two 235-7104 Hose As, and one 1S-8937 Needle Valve
- Connect the 6V-4144 Quick Connect Coupler (2) to the quick disconnect fitting (4) on the rear brakes.
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| Illustration 1 | g01334583 |
Purge hose assembly (1) Hose Assembly (2) Quick Connect Coupler (3) Needle Valve | |
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| Illustration 2 | g01332716 |
(1) Hose Assembly (2) Quick Connect Coupler (4) Quick disconnect for the right rear brake | |
- Remove the cap from the hydraulic oil tank (5) and insert the other end of the purge hose assembly (1) into the filler neck.
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| Illustration 3 | g01332737 |
Note: In order to make sure that the brake accumulators are fully charged, operate the engine at high idle for 20 seconds before each brake application.
- Run the engine at low idle.
- Open the 1S-8937 Needle Valve (3). This will allow oil to flow to the hydraulic tank.
- Depress the service brake pedal. Hold the brake pedal for approximately 20 seconds. This will purge the air from the hydraulic brake oil.
- Close the 1S-8937 Needle Valve (3) .
- Release the service brake pedal.
- Disconnect the 6V-4144 Quick Connect Coupler (2) from the quick disconnect fitting (4) on the rear brakes.
- Repeat Steps 2 through 9 for the other rear wheel brake.
Front Brakes
Note: In order to make sure that the brake accumulators are fully charged, operate the engine at high idle for 20 seconds before each brake application.
- Depress the service brake pedal. Run the engine at low idle.
- Connect a drain hose from purge valve (6) to the hydraulic tank or to a suitable container.
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| Illustration 4 | g01333147 |
View of front service brake caliper (if equipped) (6) Purge valve | |
- Open purge valve (6) on a front wheel brake housing and purge the brake system.
- Repeat Steps 1 through 3 until there is a continuous flow of oil.
- Close the purge valve. Release the brake pedal.
- Complete Steps 1 through 5 on the other front wheel brake.
- Remove the drain hose.