Komatsu Galeo HD405-7R, Operation & Maintenance Manual

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MAINTENANCE
SERVICE PROCEDURE
BLEED AIR FROM FRONT BRAKE
WARNING
Stop the machine on level ground and put blocks under the wheels before bleeding the air.
To make it easier to bleed the air, warm the oil up to a temperature of at least 40
°
C (104
°
F) before bleeding the air.
Repeat the same procedure on the left and right sides.
When bleeding the air from the front brakes and rear brakes at the same time, bleed the air from the rear brakes first.
1. Start the engine, check that the oil in the transmission case is at the specified level, that the brake oil pressure
caution lamp is out, and that the front brake cut-off switch is at the OFF position.
2. Remove the cap of bleeder screw (1), then insert a vinyl hose
(inside diameter: 8 mm (0.315 in)). Prepare a container with oil
in it and insert the other end of the hose approx. 50 mm (2.0 in)
into the oil. (Use any commercially available vinyl hose.)
3. Depress the brake pedal and loosen bleeder screw (1) approx.
3/4 turns. Keep the pedal depressed until no more bubbles
come out from the vinyl hose.
4. After bleeding the air, tighten bleeder screw (1) securely and fit
the cap.
5. Add oil. For details, see "CHECK OIL LEVEL IN TRANSMISSION CASE, ADD OIL (PAGE 3-76)".
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