Page
D-10
MAINTENANCE
Document 57.0008.5200 - 10/2006
Handler with telescopic boom
GTH-3007
D-3.5 BRAKES
• For any intervention on the braking system
(adjustment and/or substitution of the brake discs)
call in a specialised technician.
The malfunctioning of the braking system may depend
on the presence of air within the hydraulic circuit.
The braking system has two bleeding valves: valve
for the service brake circuit and valve
for the negative
parking brake circuit.
To bleed the circuit of the service brake, follow the
instructions below and ask the assistance of another
technician:
• make sure that the oil is level within the feeding tank
.
• The operator in the cab shall step on the brake pedal
repeatedly and, as soon as a certain resistance is
noticed, he shall hold the pedal stepped down.
• At this time, the operator on the ground shall loosen
valve
slowly and then re-close the valve as soon
as oil mixed with air bubbles starti flowing out.
• The two operations mentioned above shall be
repeated until bubble-free oil starti flowing out.
• bleed from both sides of the machine.
• Once the circuit has been bled, refill the small tank
up to the level mark shown in the photo.
To bleed the circuit of the negative parking brake:
• Press the parking brake button
. As soon as the
light indicator on the button goes off, start bleeding
through valve
until air-free oil comes out.
D-3.5.1 Checking the brake oil level
The oil within the braking circuit must be at about 2 cm
from the tank plug
.
Level
40
80
120
ϒ
C
0 1 2 3 4 5 6 7
80
120
ϒ
C
40
10 8 6
0
4 2
2 4 6 8 10
F
R
N
C
A
