Opening of Bids - Seitz Park Reconstruction Phase I Proj No. 117-093A - Northern Indiana Construction Co., Inc.

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and oil seals. No special or sleeve type bearings shall be used. Pump shall be equipped with a self-adjusting, maintenance -free, mechanical shaft seal. The mechanical seal shall consist of a flat, highly polished, spring fed carbon ring that rotate: with the impeller shaft. The carbon ring shall press against a highly polished stainless -steel stationary ring that is sealed within the pump body. In addition, a throttling ring shall be pressed into the steel chamber cover, providing a very small clearance around the rotating shaft in the event of a mechanical seal failure. The pump performance shall not deteriorate, nor shall the pump lose prime, while drafting if the seal fails during pump operation. Wear rings shall be bronze and easily replaceable to restore original pump efficiency and eliminate the need to replace the entire pump casing due to wear. PUMP TRANSMISSION Pump transmission shall be made of a three (3) piece, aluminum, horizontally split casing. Power transfer to pump shall be through a high strength Morse HY-VO silent drive chain. Drive shafts shall be a minimum of 2.35" diameter hardened and ground alloy steel. All shafts shall be ball bearing supported. The case shall be designed as to eliminate the need for water cooling. kIR PUMP SHIFT Pump shift engagement shall be made by a two (2) position sliding collar, actuated pneumatically (by air pressure), with a three (3) position air control switch located in the cab. Two (2) indicator lights shall be provided adjacent to the pump shift inside the cab. One (1) 9NO green light shall indicate the pump shift has been completed and be labeled "pump engaged" The second green light shall indicate when the pump has been engaged, and that the chassis transmission is in pump gear. This indicator light shall be labeled "OK to pump". Another green indicator light shall be installed adjacent to the hand throttle on the pump panel and indicate either the pump is engaged, and the road transmission is in pump gear, or the road transmission is in neutral and the pump is not engaged. This indicator light shall be YES O labeled "Warning: Do not open throttle unless light is on". Che pump shift control in the cab shall be illuminated to meet NFPA requirements. Also :onsistent with the requirements in NFPA 1901, To help prevent the accidental increase of th hrottle while still in the ROAD position there shall be three different safety interlocks before he pump panel throttle can be increased The three safety interlocks are confirmation of the apparatus parking brake activated, confirmation of a completed pump shift and confirmation )f 4th gear lockup pump mode of the apparatus transmission. CRANSMISSION LOCK -UP The direct gear transmission lock -up for the fire pump operation shall engage automatically YE O when the pump shift control, in the cab, is activated. kUXILIARY COOLING SYSTEM A supplementary heat exchange cooling system shall be provided to allow the use of water from the discharge side of the pump for cooling the engine water. Heat exchanger shall be cylindrical type and shall be a separate unit. It shall be installed in the pump or engine compartment with the control located on the pump operator's control panel. Exchanger shall be plumbed to the master drain valve. NTAKE RELIEF VALVE 57