BEFORE PLACING VEHICLE IN SERVICE
3-10 / Equipment, Accessories, and Adjustments
© 2018 Pierce Manufacturing Inc. All Rights Reserved.
3-7.3
Air Pressure Operated Equipment
•
Any air-operated equipment must only be added to the air system downstream of a pressure protection valve.
•
Consider the airflow requirements of any air-operated accessory that will draw pressure from the vehicle system.
The air compressor output with the engine at idle is a fraction of its total capacity and will not keep up with
continuous operation of most shop-type air tools.
3-8.
Equipment and Cargo Loading
Every Pierce custom fire truck is measured prior to leaving the factory to ensure that it sits level. As the
compartments are filled with equipment of varying weight, the initial weight distribution will change, which may cause
the truck to lean. The amount of lean depends on the spring rate of the suspension. Vehicles with higher capacity
suspensions will lean less when subjected to the same variation in weight.
To ensure that a vehicle does not lean objectionably, careful consideration must be given to the weight and location
of equipment. The following guidelines will help level a vehicle that has an objectionable lean:
•
Check tire pressure and tread condition. Tire pressure and tread wear can affect vehicle height by as much as
+/- 0.25 inches. Ensure that all tires are inflated to recommended pressures and that tread wear is reasonably
even from side to side.
•
Inspect the vehicle on a surface that is both flat and level. Keep in mind that the variations in height are generally
measured in fractions of an inch. The tolerance of concrete and asphalt surfaces over the length and width of
fire apparatus are rarely within the limits required to provide accurate measurements.
•
Transfer load. Balance the spring loading by shifting equipment from the low side to the high side of the vehicle.
Relocate heavy equipment closer to the longitudinal center of the vehicle whenever possible.
Pressure protection valves are installed in both front and rear brake systems to ensure that no other
air pressure requirements of the vehicle are allowed to deplete the vehicle braking system capabilities.
Addition of any air pressure equipment added by the end user upstream of these pressure protection
valves will negate the conformance of the vehicle to this NFPA recommendation and property damage,
personal injury, or death could result.
Excessively uneven loading from side to side can cause the vehicle to pull to one side during braking
and/or produce a reduction in the rollover threshold of the vehicle. Operation of an improperly loaded
vehicle could lead to loss of vehicle control causing property damage, serious personal injury, or
death.
NFPA standards specify that “All equipment required to be used during an emergency response shall
be securely fastened”. Equipment not needed during the response must be secured to 9 Gs. Items not
secured can injure or kill during a crash.
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Страница 18: ...FOREWORD 1 6 To the Owner and Operator 2018 Pierce Manufacturing Inc All Rights Reserved ...
Страница 30: ...SAFETY 2 12 Safety and Responsibility 2018 Pierce Manufacturing Inc All Rights Reserved ...
Страница 62: ...GENERAL 4 20 Controls Indicators and Features 2018 Pierce Manufacturing Inc All Rights Reserved ...
Страница 122: ...OPERATION 5 60 Driving the Vehicle 2018 Pierce Manufacturing Inc All Rights Reserved ...
Страница 180: ...LUBRICATION AND MAINTENANCE INTERVALS 7 8 Scheduled Inspections 2018 Pierce Manufacturing Inc All Rights Reserved ...
Страница 184: ...A 4 2018 Pierce Manufacturing Inc All Rights Reserved ...