Bleeding The Front Axle Brake System - Valtra T144 Operator's Manual

4. Maintenance
1. Connect a trailer or a quick coupler with plug to the quick coupling for
hydraulic trailer brakes (optional).
GUID-067368C4-2DF8-4D2A-9395-91F79E765C26
1. Quick coupling for the trailer brakes (ISO 5676)
2. Start the tractor and let it run for approximately three minutes.
This ensures that the oil from the pump is completely free from air.
3. Lock the brake pedals together.
4. Open the bleeding nipples.
It is recommended to use hoses from the bleeding nipples to a suitable
container.
NOTE: Do not let the oil run onto the ground.
5. Pump the pedals slowly until there are no air bubbles in the oil.
6. Close the bleeding nipples.
7. Check that the pedal free travel is the same on both wheels.
Check the free travel while driving with the pedals latched together.
8. Check the free travel on the rear brake pedal.
The reverse drive system is extra equipment.
4.7.6.2

Bleeding the front axle brake system

The front axle equipped with a brake system is extra equipment.
The brake system uses the same oil as the transmission system. The oil in the
brake circuits is not changed when changing the transmission oil. Therefore, the
brake circuit oil has to be changed by bleeding after every transmission oil
change. Also when repairing, the system has to be filled and bled in the same
way.
1. Start the tractor and let it run for about three minutes.
This ensures that the oil from the pump is completely free from air.
DANGER: The quick coupling for hydraulic trailer brakes must be
connected when bleeding the brakes. If the quick coupling is not
connected, the brakes will not be bled. This will cause the brakes
to malfunction.
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