TM 5-3805-255-14
0005
STOPPING THE LOADER CONTINUED
Automatic Brake Apply System
0005
The loader is equipped with an "automatic brake apply system" which has a separate, protected, brake system for
each axle. Under normal operating conditions, both braking systems work together and are controlled by either one
of the two treadle valves in the operator's compartment.
As the term "automatic brake apply system" implies, the regular service brakes will be applied automatically under
certain emergency conditions. These conditions are described below.
Working in conjunction with the automatic brake apply system is an audible warning device (buzzer). Whenever the
air pressure in the wet air reservoir is 60 psi (414 kPa) or less buzzer will sound warning the operator of low air
pressure in the wet air reservoir (and/or low air pressure in one, or both, of the service air reservoirs). This buzzer
warning will give the operator time to prepare for an involuntary stop.
CAUTION
If the low air pressure warning buzzer sounds, stop the loader immediately, apply the
parking brake, investigate and correct the cause of low air pressure. Failure to comply will
damage equipment.
Air loss, in most cases, would be limited to one of the air brake systems. Should rear axle air system fail, front axle
system will continue to meter air pressure above 50 psi (345 kPa) in the wet reservoir. Each service reservoir is
protected by a check valve between it and the air supply (wet tank).
Should air pressure in the wet air reservoir drop to approximately 50 psi (345 kPa) the brakes will be applied
automatically by the action of the emergency protection unit to stop and hold the loader. The brakes will remain
applied until pressure in the wet reservoir again reaches approximately 60 psi (414 kPa).
Loss of air pressure in both of the service air reservoirs will not activate the "automatic brake apply system" and
the loader will not have any service brakes.
END OF TASK
PARKING THE LOADER
0005
1. Park loader in area free of grease or fuel puddles, which cause tire deterioration.
2. Lower hydraulically supported loader equipment to ground to reduce injury possibilities and to gain loader
stability.
WARNING
Parking on a steep slope is not recommended. Failure to follow this warning could result in
injury to personnel or damage to equipment.
3. Park loader on level ground, if at all possible, to avoid unexpected movement, and to obtain accurate coolant,
lubricant, and fuel level checks.
4. If necessary to park on slope, park at right angle, then secure with blocks (front and rear).
END OF TASK
0005-12
