Specifications

Smeal Pumper Demo # 4276
Page 15 of 58
The pump body shall be painted with PPG polyurethane enamel paint. The paint color shall be a neutral
gray. The pump enclosure shall be painted the same color as the apparatus body.
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The steamer and partially recessed inlet valves shall be painted with a PPG polyurethane enamel paint.
The paint color shall be the same as the apparatus body.
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ZINC ANODES
There shall be four (4) Waterous zinc anodes provided with the fire pump. The anodes shall aid in
preventing galvanic corrosion within the water pump and be easily replaceable. The anodes shall be
installed as follows:
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 Two (2) on the intake side of the pump
 Two (2) in the discharge manifold of the fire pump.
FLAME PLATED IMPELLER HUBS
The pump impellers shall be bronze, specifically designed for the fire service and accurately balanced for
vibration free running. The stripping edges shall be located on opposite sides of the impellers to reduce
shaft deflection.
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The impeller shaft shall be stainless steel, accurately ground to size and supported at each end by oil or
grease lubricated anti-friction ball bearings for rigid, precise support. The bearings used on the impeller
shaft shall be automotive type bearings, easily cross-referenced and readily available at normal parts or
bearing outlets.
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The impeller hubs shall be flame plated with tungsten carbide to hardness approximately twice that of tool
steel to assure maximum pump life and efficiency. During the flame plating process the base metal shall
not be allowed to exceed a temperature of 300 degrees Fahrenheit to prevent altering the metallurgical
properties of the impeller material.
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WATEROUS IMPELLER WEAR RINGS
The pump shall be equipped with replaceable bronze wear rings for increased pump life and minimum
maintenance cost. The wear rings shall be designed to fit into a groove in the face of the impeller hubs
forming a labyrinth that, as the clearance increases with age, directs water from the discharge side in
several directions eventually exiting outward, away from the eye of the impeller hub.
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PUMP PACKINGS 
The stuffing boxes shall be equipped with Waterous Grafoil® two-piece adjustable packing glands.
AIR OPERATED PUMP SHIFT 
The pump shift actuating mechanism shall be air operated from a valve in the cab identified as "PUMP
SHIFT". Full instructions for shifting the pump shall be inscribed on the valve plate.
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There shall be two (2) green pump system shift indicator lights in the chassis cab. The first light shall
become energized when the pump has completed its shift into pump gear and shall be labeled "Pump