10 Pumps Flashcards
Auxiliary coolers
Controls the temp of coolant on the apparatus during pumping
Engine throttle
Used to increase or decrease the speed of the engine that powers the fire pump
Voltameter
Provides a relative indication of the battery condition, alternator output
Overheat indicator
Works in conjunction with temperature gauges. What is the driver operator when the pump becomes overheated.
Tachometer
Records the engine speed in RPM used on pump, service, test useful for analyzing trouble with the pump
Automatic pressure gauge
The device must operate within 3 to 10 seconds after that just charge pressure rises must not allow the pressure to exceed 210 kpa
Positive displacement pumps
Mostly replaced by Centrifugal pumps
Still necessary to the pumping system, and modify all apparatuses because they pump air
Types include piston and rotary.
Rotary pumps
Are the simplest design
Where are used an older apparatuses
Now used as low volume high pressure pumps
Front mounted pumps
Driven through a gearbox and a clutch connected by universal joint shaft to the front of the crankshaft
More susceptible to freezing in cold climates
Can instruct the airflow for the vehicles radiator, contributing to the engine overheating
Midship pumps
Mounted literally across the free behind the engine and transmission
Supplied power through a split shift gear or transfer case
Rear mounted pumps
Avg provides more weight distribute
Allows for more space for tools and equipment
Dis
May expose driver/operator to oncoming traffic
Maybe powered by a split shaft or PTO
Auxiliary engine driven pumps
Powered by a different gas or diesel engine in the one used to drive the vehicle
Offer the most flexibility can be mounted anywhere on the apparatus
Centrifugal pumps
Used on nearly all modern apparatuses
Have virtually eliminated the positive displacement pump
Consist of impeller casing, and volute
