Buhler 2425 - Manual (Page 297)

SECTION 3 - LUBRICATION AND MAINTENANCE
3-73
AS REQUIRED
OPERATION 72
Change the Brake Fluid
The brake fluid should normally not require
changing except in the case where
contamination of the brake system has occurred.
To change the brake fluid and bleed the air from
the brake system, use the following procedure:
Shut the tractor off, chock the wheels, and install
the articulation lock.
Remove the small clamp and hose from the side
of the brake reservoir and allow the fluid to drain.
Reinstall the hose and clamp.
Loosen the supply tube, 1, at the caliper and
allow the oil trapped in the tube and caliper to
drain out. Reinstall the tube to the caliper and
tighten.
Refill the reservoir with brake fluid. Have an
assistant sit in the operator’s seat and slowly
pump the brake pedal several times. After the
assistant pumps the brake pedal, apply a steady
downward pressure on the pedal.
Figure 3-121
1
While the assistant holds the brake pedal down,
loosen the brake bleeders, 1, and allow any air
and fluid to escape from the caliper pistons.
There is a front and rear bleeder on the caliper;
alternate loosening the bleeders to purge any air
from the system. Make sure the assistant
keeps steady downward pressure on the
brake pedal anytime the bleeders are open.
The pedal will bottom out during each bleeding
operation; close the bleeder and repeat the
process until the system is purged of all air and
the pedal is firm when pressed.
Use DOT 3 brake fluid which may be obtained
from your Buhler Versatile dealer.
Figure 3-122