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HomeMy WebLinkAbout303.014 - Darley JMP-500 Two Stage Pump TRAINING AND EQUIPMENT MANUAL 303 PUMPS 303.014 DARLEY JMP-500 TWO STAGE PUMP EFFECTIVE: JULY 2020 Current Revision Date: 07/09/20 Next Revision Date: 07/09/25 Author’s Name/Rank: Robert J. Garcia, Engineer Review Level: 3 Administrative Support: Leslie Oulashian, Management Analyst II Section 303.014 Page 1 of 4 PURPOSE The purpose of this procedure is to provide information and operational procedures to Fresno Fire Department (FFD or Department) members on the Darley JMP-500 Two Stage Pump used on the 2020 BME Brush Engine Apparatus. APPLICATION FFD Brush Engines are equipped with Darley JMP-500 Two Stage Pumps. OPERATIONAL POLICY The apparatus shall be chocked anytime the pump is engaged in a stationary position. This pump shall not be used for hose testing. OPERATIONAL GUIDELINE This section intentionally left blank. PROCESS 1. Power Take Off (PTO) Pump Shifting Procedure: a. Engaging the fire pump: i. Position the apparatus: 1) Bring the vehicle to a complete stop. Section 303.014 Page 2 of 4 2) Set the parking brake. 3) With engine speeds at idle, place the transmission in neutral. ii. Shift the Pump: 1) Shift the PTO by pulling on the toggle switch labeled “ENGAGE/DISENGAGE” and move upward. 2) The “PUMP ENGAGED” light will illuminate. 3) “OK TO PUMP” light will illuminate. a) If the light fails to illuminate, review to ensure the parking brake is set and the transmission is in neutral. Move the PTO lever back to the “OUT” position. Start again at Step 2. 4) Open the “TANK TO PUMP”. 5) Prime the pump. 6) Select the pump stage. a) Volume: i) Volume operations are employed for maximum capacities at lower pressures. b) Pressure: i) Pressure at restricted capacities for higher pressure, or lower engine speeds. 7) Observe pressure gauge on the panel while advancing the throttle, to ensure it is indicating pressure. If pump is not engaged, no pressure will show. Section 303.014 Page 3 of 4 8) Remember, the throttle has a quick release emergency center button. If the truck moves, immediately push the center emergency button all the way in to close throttle. b. Disengaging the fire pump. i. Decrease the engine speed to idle. ii. Shift out of pump by pulling out on the toggle switch labeled “ENGAGE/DISENGAGE” and moving it downward. iii. The “PUMP ENGAGED” light will go out. iv. The “OK TO PUMP” light will go out. Note: Failure to follow proper shifting or operating sequences will result in premature PTO failure with possible damage to other components. INFORMATION The JMP-500 pump is a high-speed, two-stage, centrifugal pump, adapted to operate with its two impellers in series as a two-stage pump, or in parallel with the characteristics of a conventional single-stage pump. The pump is powered from a transmission PTO. The pump is operated in series (pressure) at restricted capacities for higher pressure, or lower engine speeds. Parallel (volume) operations are employed for maximum capacities at lower pressures. If the pump is operating in volume, the output pressure will be doubled if it is switched to pressure (the capacity is reduced by one half) and the engine speed is kept the same. Performance: 500 gpm @ 150 psi 375 gpm @ 200 psi 250 gpm @ 250 psi 100 gpm @ 500 psi Dimensions and weight: 24.5” L x 12” W x 26” H, 250 lbs. Section 303.014 Page 4 of 4 Water maybe drafted from a pond, lake, stream, cistern, stock tank, or well, but whatever source, the static lift must not exceed 20 feet from the center of the pump to the surface of the water and a lift not exceeding 10 feet is recommended. The source should be reasonably clear and free from foreign matter. For more information, see the following link: Darley JMP-500 Manual DEFINITIONS Power Take Off (PTO): A device that transfers an engines mechanical power to another piece of equipment that does not have its own engine or motor (e.g., a PTO runs the Darley JMP-500 pump using the main engine power). Static lift: The vertical height of the center of the pump above the source of supply when pumping from draft. CROSS-REFERENCES No cross-references recognized.