Zetor CRYSTAL HD 150, Operator'S Manual

Page: 116 / 234

Emergency braking
If the air pressure in the tractor's air system drops below 10 bar while driving and the tractor's
operation brakes stop working, use the handbrake for emergency braking of the tractor.
If the air pressure in the hand brake circuit drops, the tractor automatically brakes regardless of the
hand brake lever position.
As long as the air pressure in the tractor's air system does not raise to more than 10 bar, the tractor
remains braked.
Unblocking the tractor brakes when the air pressure drops
FHD18N032
If the tractor has been braked due to the air pressure drop in the tractor's air pressure system and the tractor
has to be towed off, the tractor brakes can be unlocked for the time required for tractor towing.
Only use the tow rod to tow the tractor off. Tractor with unlocked brakes does not brake!
The tractor brakes can be unlocked by loosing the screws located on the two brake cylinders that are located
on the rear side of the rear half axle (a).
On both cylinders, loosen one screw indicated by arrow (b).
Caution: The screws can not be completely dismantled, loosen the screws until the resistance
to the loosening increases to 35 Nm, the loosen screws remain in the working cylinders (c).
After the towing, immediately tighten the screws in both work cylinders to their original state by
a torque of max 70 Nm.
DRIVING OPERATION
115