| Required Tools | ||
|---|---|---|
| Part Number | Description | Required Amount |
| 6V-4144 | Quick Connect Coupler | 1 |
| 235-7104 | Hose As | 1 |
| 1S-8937 | Needle Valve | 1 |
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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, "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. |
- Assemble the following in order to construct a purge hose assembly: one 6V-4144 Coupler, one 235-7104 Hose As and one 1S-8937 Needle Valve .
- Connect the 6V-4144 Quick Connect Coupler to the quick disconnect fitting at the bottom of the service brake accumulator.
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| Illustration 1 | g02323719 |
Location of the quick disconnect fitting at the bottom of the service brake accumulator | |
- Overfill the hydraulic tank.
- Open the 1S-8937 Needle Valve. This will allow oil to flow to the suitable container.
- Pressurize the hydraulic tank to 100 kPa (15 psi). Use a breaker valve in order to prevent the tank from over pressurization.
- When a steady stream of oil is observed, close the needle valve .
- Check the oil level in the hydraulic tank. If necessary, depressurize the hydraulic tank and refill the hydraulic tank to the full mark. Repressurize the hydraulic tank to 100 kPa (15 psi). Use a breaker valve in order to prevent the tank from over pressurization.
- Start the engine and run at low idle for 5 minutes.
- Stop the engine.
- Release the pressure from the hydraulic tank.
- Relieve the pressure on the purge hose assembly by opening the needle valve. Remove the purge hose assembly.