OPERATING INSTRUCTIONS HEF DOLPHIN FLOAT PUMP Corporate Office: Pump Manufacturing: Apparatus Division: 325 Spring Lake Drive Itasca, Illinois 60143-2072 800-323-0244, fax (708) 345-8993 1051 Palmer St. Chippewa Falls, WI 54729 800-634-7812, Fax (715) 726-2656 920 Kurth Rd. Chippewa Falls, WI 54729 800-527-0068, Fax 726-2648 WWW.DARLEY.
Introduction This manual provides information for the use and understanding of this manual, correct operation, maintenance, troubleshooting of the Darley HEF Dolphin Float Pump, definition of terms, and contacts. Please read and understand these instructions thoroughly before putting this system into service. Doing so will ensure optimum performance and long life of your Darley Floating Pump. This manual is divided into eight sections, each section details an important portion of this manual and pump.
Section 1 Definition of Symbols Prepared by: RJG Approved by: TED Revised by: TED Rev. A Date: 03/04/10 Rev. Date: 30June2015 1200627.
IMPORTANT Throughout this manual will find Caution, Warning and Danger symbols. Please pay close attention to these symbols as they are for your safety. - Signifies an imminently hazardous situation that could result in death or serious injury. - Signifies a potentially hazardous situation that could result in death or serious injury. - Signifies a potentially hazardous situation that might result in minor or moderate injury.
Section 2 Operation Prepared by: RJG Approved by: TED Revised by: TED Rev. A Date: 03/04/10 Rev. Date: 30June2015 1200627.
Operating Instructions For Darley “DOLPHIN” Floating Fire Pump Do not use this pump for hose testing. Such testing could result in major pump or engine damage. Such damage may cause explosion, overheating of the engine and/or pump, and bodily harm. PREPARATIONS FOR PUMPING Make sure to read the engine instruction manual before usage. Check the engine oil level before starting the engine. Check the fuel level before starting the engine.
Section 3 Maintenance (Assembly/Disassembly) Prepared by: RJG Approved by: TED Revised by: TED Rev. A Date: 03/04/10 Rev. Date: 30June2015 1200627.
PUMP DISASSEMBLY Drawing DHC1204 For pump overhaul or disassembly follow the corresponding steps Drain oil and gas from engine, ensuring there is no fuel in the tank or lines. o There may be small residual amounts of oil remaining in the engine (up to 8 ounces), which may read at the very end of the dipstick (see photo below). If the oil level is up as high as the H on the dipstick, below the ADD mark, the oil needs to be further drained prior to tipping the engine.
Remove impeller (16) by threading a 9/16-12 NC x 1 3/4 pusher bolt into the tapped hole occupied by the impeller bolt. Do not force impeller, use penetrating oil on the engine shaft if the impeller will not move. Pump casing should be removed only if necessary to replace pump pilot bushing (20). Inspect and replace worn or damaged parts. If you are unsure if a part is damaged or worn contact Darley Customer Service or Engineering for assistance.
Lightly oil the inside diameter of the pilot bushing, and re-attach the pump casing to the engine (see photo below). Ensure that the engine is laying with the exhaust facing down. FINGER TIGHTEN fasteners between the pump casing and the engine evenly in an alternating opposite corner pattern to prevent cocking of the pump assembly in relation to the engine (see photo below). Place the drive key in the engine shaft keyway. Lightly oil the bore of the impeller.
Slide the impeller onto the shaft, being careful not to roll the lips of the mechanical seal backwards. Install the impeller washer and 7/16-20 x 1.00 lg. SST HHCS with a small drop of Loctite 242/243 (Blue) thread locker to hold the impeller in place. Ensure that the spark plug is removed from the engine and a clean rope is in its place. This will allow you to effectively tighten the impeller fastener without the engine shaft rotating.
Tighten the four fasteners that hold the pump assembly to the engine evenly in an alternating opposite corner pattern to prevent cocking of the pump assembly in relation to the engine (see photo below). DO NOT OVERTIGHTEN. Pull the recoil rope two or three times again, to ensure that the pump assembly and engine are aligned. If the assembly is binding, or turns over hard, loosen the fasteners, and repeat the previous two steps. Reinstall the spark plug.
Install the discharge pipe to the pump casing discharge nipple using Loctite 242/243 (Blue) thread locker. Using three flat washers, lock washers, and 5/16 x 0.75 lg HHCS, fasten the mounting plate to the float. DO NOT OVER TIGHTEN. DO NOT USE THREAD LOCKER. Prepared by: RJG Approved by: TED Revised by: TED Rev. A Date: 03/04/10 Rev. Date: 30June2015 1200627.
Prepared by: RJG Approved by: TED Revised by: TED Rev. A Date: 03/04/10 Rev. Date: 30June2015 1200627.
Prepared by: RJG Approved by: TED Revised by: TED Rev. A Date: 03/04/10 Rev. Date: 30June2015 1200627.
Section 4 Components Prepared by: RJG Approved by: TED Revised by: TED Rev. A Date: 03/04/10 Rev. Date: 30June2015 1200627.
The float for this unit is foam filled to assist in buoyancy. The pump casing is hard anodized aluminum. The impeller is manufactured from bronze. It is ground and dynamically balanced for maximum performance. The suction head is anodized aluminum. The engine is a gasoline powered, Briggs and Stratton, vertical shaft model. The engine has a built in governor to limit the engine speed. The fuel tank is plastic. The fuel tank capacity is 2.
Section 5 Maintenance Schedule Prepared by: RJG Approved by: TED Revised by: TED Rev. A Date: 03/04/10 Rev. Date: 30June2015 1200627.
IMPORTANT Check your engine instruction manual for recommended maintenance schedule. Darley recommends flushing the pump and minor disassembly inspections if the pump is not performing as intended. Prepared by: RJG Approved by: TED Revised by: TED Rev. A Date: 03/04/10 Rev. Date: 30June2015 1200627.
Section 6 Troubleshooting Prepared by: RJG Approved by: TED Revised by: TED Rev. A Date: 03/04/10 Rev. Date: 30June2015 1200627.
Pump does not make advertised performance anymore. The mechanical seal may be damaged and this is reducing the flow and/or pressure of the pump unit. The seal rings may be damaged due to pumping dirty or salt water. The engine needs to be checked for problems. There is debris lodged in the suction inlet strainer or impeller vane. The pump is in an insufficient depth of water. The pump impeller is no longer sufficiently tightening to the engine shaft.
Section 7 Definition of Terms and Operating Characteristics of Pumps Prepared by: RJG Approved by: TED Revised by: TED Rev. A Date: 03/04/10 Rev. Date: 30June2015 1200627.
DEFINITIONS HEAD OF WATER -- vertical depth of water measured in feet or in pressure per unit or area. In hydraulics, head always represents pressure and it is expressed interchangeably in feet of water or pounds per square inch and sometimes in inches of depth of mercury. STATIC HEAD -- the pressure that is exerted by a stationary column of water of a given height or depth.
WATER HAMMER -- a series of shock waves produced in a pipeline or pump by a sudden change in water velocity. A sudden change in flow velocity can result from rapid closure of valves. A pressure wave is set up which travels back and forth in the water column at extremely high speed producing rapid vibrations that may be violent and destructive if the water column is long. THE MAXIMUM THEORETICAL LIFT of a pump is 34 feet, which is the pressure of the atmosphere at sea level.
Slip is the greatest factor affecting efficiency of a displacement pump, and this factor is greatly influenced by the condition of and wears on the working parts. Prepared by: RJG Approved by: TED Revised by: TED Rev. A Date: 03/04/10 Rev. Date: 30June2015 1200627.
Section 8 Contacts Prepared by: RJG Approved by: TED Revised by: TED Rev. A Date: 03/04/10 Rev. Date: 30June2015 1200627.
Corporate Darley Office Equipment/Catalog Division 325 Spring Lake Drive Itasca, Illinois 60143-2072 Phone: 800-323-0244 Fax: (708) 345-8993 Apparatus Division 920 Kurth Rd. Chippewa Falls, WI 54729 Phone: 800-527-0068 Fax: (715) 726-2648 Pump Manufacturing 1051 Palmer St. Chippewa Falls, WI 54729 Phone: 800-634-7812 Fax: (715) 726-2656 Briggs and Stratton Visit www.briggsandstratton.
