Hydraulic Front Brake System - Bleeding The Air - New Holland TD60D Repair Manual

HYDRAULIC FRONT BRAKE SYSTEM (Optional)
Bleeding the air (Operation 33 202 04)
Air must be bled whenever work has been carried out
on the front brake hydraulic system.
Proceed as follows.
1. Thoroughly clean the external parts of the unit
around the bleed screws (1 and 2, fig. 36), and
the hydraulic oil tank lid (1, fig. 35).
2. Make sure that the hydraulic oil tank (1) is filled
up above the minimum level before and during
the bleeding operations.
3. Depress the LH brake pedal, slowly and to the
end of its travel, so that the fluid is placed under
pressure.
Note. -- Filter all drained oil before reusing.
4. Keeping the pedal depressed, undo the bleed
screw (1) by half a turn. Allow the fluid mixed with
air bubbles to flow out.
5. Retighten the screw (1) and repeat the above
operations until the oil that comes out is free of
air bubbles.
6. Depress the LH brake pedal again to place the
circuit under pressure. This occurs when the tra-
vel of the pedal returns to normal.
7. Repeat the above operations for the RH brake
pedal from the bleed screw (2).
8. Depress the LH and RH brake pedal, slowly and
to the end of its travel, so that the oil is placed un-
der pressure.
9. Keeping the brake pedals depressed, undo the
bleed screw (1) by half a turn. Allow the fluid mi-
xed with air bubbles to flow out.
10. Retighten the screw (1) and repeat the above
operations until the oil that comes out is free of
air bubbles.
11. When the operation has been completed, reple-
nish the fluid in the tank (1, fig. 35).
SECTION 33 - - BRAKES - - CHAPTER 1
1
TRE0305A
TRE0307A
1
TRE0237A
19
2
35
36
37
603.54.471.00 - - 11 - - 2004