A failsafe braking system for heavy plant machinery. Suitable for multi-tyred rollers, graders, front end loaders, water tanks, road rollers and any vehicle fitted with mechanical parking brake system. Alfasafe 'Emergency Stop Button' can be fitted to any type of earthmoving and mining equipment.
Alfasafe System Features
event of electrical, engine or hydraulic failure, the 'Alfasafe'
parking brake will take effect and prevent the driven wheels
from rotating on gradients up to 20% (11.3 degrees).
coefficient of friction between tyres and a surface is low,
the tyres may slide a short distance without rolling. If
the driven wheels do not slide, the roller will remain motionless
on gradients up to 20%.
a vehicle of 15,000kg operating mass for the 'Alfasafe
Brake System' to be effective and efficient:
- the vehicle must not be loaded above 15,000kg,
- not less than one third of all the wheels must be mechanically
connected to the propeller shaft,
- local undulations beneath the wheels should not exceed
a gradient of 20%
- the non-asbestos brake pads must not have more than
.31mm clearance,the parking brake must be initially burnished
by decelerating 10 times, from 8 km/h, so that the roller
came to a halt within 10 metres,
Alfasafe System Operation
Brake System' is designed to 'release' when the
oil pressure and hydraulic pressure are at their normal
the engine running, a 'Green Button' on the driver's control
panel can be pressed to apply hydraulic pressure against
the belleville springs of the calliper, and this action
releases the brake pads from the brake disc.
If one of the 'Red Buttons' (which are positioned on the drivers control panel and four exterior locations) is pressed, the brake pads will be applied against the brake discs.
system features automatically come into action when the engine is switched off, or fails, or when the hydraulic pressure in the steering circuit is low, or the red button is depressed. The oil drains from the calliper and the belleville springs compress the brakes against the brake disc.
Alfasafe System Specifications
'Alfasafe Brake System' has proven track
record, and has been fitted and tested with multi-tyred
road rollers to give outstanding results. The system has
been road tested to stop a 15 tonne multi-tyred road roller
within 10 metres.
Brake System' is set to specification and loaded
to slip at 19.8 kiloNewton metres torque.
Circuits are protected to provide a failsafe system.
the slip torque exceeds 12.8kNm the Alfasafe Brake System
exceeds the requirements of standard SAE J263.
Components have been designed to give a factor of safety of at least 1.5.
the elements of the system are at their wear limits, the
requirements of SAE J263, for parking brakes will still
Plant operation is high risk, and there are many injuries
and fatalities. By regulation, the standard practice requires
a parking brake to be effective on a gradient of 20%. Sadly,
with age and wear, these requirements are not always met.
Alfasafe Brake System inventor Mr Allen Wehrmann has many
years experience servicing large plant and machinery, in
particular multi-tyred rollers. After much consideration
of alternatives and current products in the market-place,
taking into account all hazards, risks and regulations,
the decision to develop the 'Alfasafe Brake System' has
become a safety milestone.
Allen developed this outstanding fail-safe braking system
after a friend was killed on a multi-tyred roller.
For further information on the Alfasafe Brake System,
call us on (08) 8347 0083 or email us on email@example.com