Specifications

42
WATEROUS SINGLE-STAGE CS1250 GPM PUMP
A 1250 gallon per minute, Waterous Model CS, Class A, single-stage centrifugal fire truck pump shall be
furnished, mounted in the vehicle. The specified pump transmission gear ratio shall allow the pump to
deliver the percentage of rated capacity at discharge pressures indicated below, while the drive engine is
running in its peak performance range/RPM:
100 percent of rated capacity at 150 pounds net pressure
100 percent of rated capacity at 165 pounds net pressure
70 percent of rated capacity at 200 pounds net pressure
50 percent of rated capacity at 250 pounds net pressure
PUMP INSTRUCTION MANUALS
Two (2), Waterous instruction manuals, one (1) digital CD format, and one (1) hard copy, to be provided
upon delivery of the apparatus. Manuals to be pump model and serial number specific, to include but not
be limited to operation instructions, maintenance (lubrication), and illustrated parts break-down.
PUMP TEST DATA PLATE
The pump shall be provided with a metal plate giving the rated flow at "capacity" and "pressure" test
pressures, together with the RPM of the engine at those pressures and deliveries, and mounted in clear
view of the pump operator's panel. Test plate shall also indicate pump serial number, engine governed
speed, and pump mode of operation for all four individual pump rating tests.
MECHANICAL PUMP SEAL
The Waterous pump shall be equipped with a mechanical self-adjusting impeller shaft seal assembly.
AIR PUMP SHIFT
The pump shift shall be pneumatically operated using a standard automotive air valve to control a double
action air shift cylinder, designed so that the pump shift remains in its latest position in the event of loss
of air pressure. Shift engagement shall be provided by free-sliding collar with internal locking
mechanism. The pump shift engagement control will be located to be easily accessible to driver.
Engagement control will include: air control lever with spring loaded locking collar to prevent it from
accidentally being moved from the "ROAD" or "PUMP" position, "PUMP ENGAGED" light indicating
mechanical shifting of the pump into the "ROAD" position has been accomplished, "O.K. TO PUMP"
light to indicated chassis transmission is in the correct pumping gear, and a control plate describing
operation of the pneumatic power shift assembly.
An additional indicator light to be furnished on pump control panel, adjacent to, or integral with, engine
throttle, to indicate that the vehicle transmission is in the proper gear and driveline is rotating: "O.K. TO
PUMP".
TRANSMISSION LOCK-UP
The direct gear (1:1 ratio) vehicle transmission lock-up for the fire pump operation shall engage
automatically when the pump shift control, in the cab, is activated.