General Pump HF Series Owner'S Manual Download Page 1

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HF/N

Owner’s Manual

• Installation

• Use

• Maintenance

Serial #10127003 and Later

NOTE: This Manual

covers HF pumps with

Serial Numbers starting at

10127003

Ref 300764 Rev. F

05-21

HF25N

HF18 - HF20 - HF22 - HF25 WK355

General Pump

is a member of

the Interpump Group

Summary of Contents for HF Series

Page 1: ...llation Use Maintenance Serial 10127003 and Later NOTE This Manual covers HF pumps with Serial Numbers starting at 10127003 Ref 300764 Rev F 05 21 HF25N HF18 HF20 HF22 HF25 WK355 General Pump is a member of the Interpump Group ...

Page 2: ...oning Page 9 9 2 Direction of rotation Page 10 9 3 Version change Page 10 9 4 Hydraulic connections Page 11 9 5 Pump supply Page 11 9 6 Inlet line Page 11 9 7 Filtration Page 12 9 8 Outlet line Page 13 9 9 Internal Diameter of hose Page 13 9 10 V belt transmission Page 14 9 11 Transmission Definition Page 15 9 12 Static pull to apply on belts Page 16 9 13 Transmission of power from second PTO Page...

Page 3: ... for damages arising from the misuse and non observance of the instructions indicated in this manual On receiving the pump please check that it is complete and in good state Should you find anything out of order please contact General Pump before installing and starting the pump 2 SYMBOL DESCRIPTIONS Warning Potential Danger Danger Electrocution Danger Danger Wear protective mask Danger Wear goggl...

Page 4: ...n checked personnel Page 4 Serial 10127003 and Later HF SERIES GENERAL PUMP A member of the Interpump Group 3 SAFETY 3 1 General Warnings for Safe Operation The misuse of a high pressure water unit and the non observance of the pump installation and maintenance instructions may cause serious damages and or injuries to people or properties or both Any Manufacturer Operator requested to assemble use...

Page 5: ...perators consisting of at least 2 members capable of giving mutual and immediate assistance in case of emergency and for taking turns during long and demanding operations 4 The area in which the work is to proceed should be clear of loose items and debris to prevent tripping and slipping hazards 5 The water jet should be directed only and always against the workpiece even during preliminary operat...

Page 6: ...ssure Power l min GPM bar PSI kW HP HF18 800 1000 30 38 8 1 10 1 600 500 8700 7250 35 5 36 8 48 50 HF20 1000 47 12 4 400 5800 36 8 50 HF22 800 1000 45 57 12 15 400 350 5800 5070 35 5 36 8 48 50 HF25 HF25N HF25N F 1000 73 19 3 280 4060 36 8 50 WK355 1000 57 15 1 350 5075 38 1 51 8 Fig 2 Fig 2a Dry Weight 132 2 lbs Dry Weight 134 5 lbs Ref 300764 Rev F 05 21 ...

Page 7: ... volume of the pump above its maximum value unless especially authorized by our Customer Service Department 7 3 Lowest operating RPM The lowest operating speed allowed for these types of pumps is 100 RPM for non continuous periods any rpm other than as shown in the performance table see chapter 5 must be expressly and authorized Customer Service Department BRAND TYPE GENERAL PUMP SERIES 220 ARAL A...

Page 8: ...g pos 2 fig 3 The oil check and change must be carried out as indicated in the table in fig 14 chapter 11 The quantity required is 128 oz 3 8 litres In any case oil must be changed at least one a year as it is degraded by oxidation For room temperatures other than 32 F to 86 F 0 C to 30 C follow the instructions in the following diagram considering that oil must have a minimum viscosity of 180 cSt...

Page 9: ...igid and perfectly flat and horizontal base by means of the proper four M16 x 1 5 threaded feet Tighten the screws to 155 ft lbs 210 Nm The base should be rigid enough to avoid any misalignment or flexing on the pump transmission coupling axis due to the torque involved during operation The unit should not be rigidly fixed on the floor but be installed upon vibration dampeners For special applicat...

Page 10: ...TO shank on the right side The pump version is defined as left when Observing the pump facing the head side the pump shaft must have a PTO shank on the left side Note The version shown in Fig 5 is right The pump can only be modified by trained and authorised personnel and carefully following the instructions below 1 Separate the hydraulic part from the mechanical part as indicated in chapter 2 par...

Page 11: ...the following characteristics 1 The minimum internal diameter as indicated in the graph in par 9 9 and in any case equal to or exceeding that of the pump head 2 The layout must be such as to prevent cavitation problems 3 It should be perfectly airtight 4 It must be positioned in such a way to prevent the pipe emptying after the pump stops 5 Do not use 3 or 4 way hydraulic fittings adapters swivel ...

Page 12: ...racteristics 1 The filter capacity should be at least three times the rated pump volume 2 Filter port diameters should not be smaller than the pump inlet ports 3 Filtration degree in between 50 and 80 mesh 360 to 200 microns For smooth pump operation regular filter cleaning is necessary planned according to the actual use of the pump in relation to the quality of water used and actual clogging con...

Page 13: ...s that lead to a pressure measured at the pump 7 If necessary the effects of the pump pulsations can be reduced by installing a proper pulsation dampener in the pressure line 9 9 Internal Diameter of Hose To determine the internal diameter of the hoses follow the following diagram Inlet Hose With a flow rate of 74 l min and a water velocity of 0 5 m sec The graph line joining the two scales meets ...

Page 14: ...elt can verified in the diagram in fig 7 in relation to the number of rpm normally declared by the manufacturer Minimum duct pulley diameter on pump shaft 250 mm The radial load on the shaft must not exceed 5532 Ft lbs 7500 N value necessary for layout definition The transmission is considered adequate if the load is applied to a maximum distance a 1 57 in 40 mm from the shaft shoulder P T O as sh...

Page 15: ...Definition To prevent irregular radial loads on the shaft and the relative bearing follow these directions A Use pulleys with V belts with the size of the groove required recommended by the manufacturer of belt used In the absence of directions follow fig 8 and the table in fig 9 Fig 8 Ref 300764 Rev F 05 21 ...

Page 16: ...ed in par 9 12 D Belt length has a natural tolerance 0 75 For this reason the 2 belts must be purchased as a pair E Follow the direction of the belt pull as shown in fig 9 for other needs contact out Customer Service Department F Take care of the alignment of the driving pulley and driven pulley grooves 9 12 Static Pull to Apply on Belts Static pull depends on A The wheelbase between the two pulle...

Page 17: ...supplier of the belts control of proper pull and its relative re tensioning should be performed after no less than 30 minutes of motion necessary for the normal adjustment of the belts Best perfor mance and durability will be achieved with proper tensioning Note 2 In case of necessity or for routine maintenance never replace a single belt but the complete set 9 13 Transmission of Power From the Se...

Page 18: ... 23 Ft lbs 130 N which corresponds to 14 HP at 750 RPM 14 8 HP at 800 RPM 16 6 HP at 900 RPM 18 6 HP at 1000 RPM 22 2 HP at 1200 RPM By means of V belt the transmission id considered suitable if belt pull is applied at a max dis tance of 0 87 in 22 mm from the bend shaft shoulder fig 13 Min diameter of pulley to be used Ø 100 mm With transmission by means of the joint pay particular attention to p...

Page 19: ...joint tilt belt pulling etc remain within limits required by the transmission manufacturer 5 Oil in the pump casing is at level verified with a dipstick fig 14 pos 1 and exceptionally with a level indicator fig 14 pos 2 Fig 14 In case of prolonged storage of long term inactivity check proper functioning of the suction and outlet valves 10 2 Start Up 1 At first start up verify that the rotation dir...

Page 20: ...k use a suitable container containing the solution to be pumped Close the filter drainage if open Make sure that the hoses to be used are clean inside and spread grease on their connections Connect the high pressure exhaust hose to the pump Connect the suction hose to the diaphragm pump Connect the suction hose between the pump head and the diaphragm pump Fill the service container with solution e...

Page 21: ...flow rate The pump is not primed due to insufficient head or the outlet is closed during priming The pump is not primed due to valve jamming Worn valves Worn pressure seals Imperfect functioning of the pressure control valve Problems on the transmission THE PUMP DOES NOT DELIVER THE RATED VOLUME Insufficient feeding due to the cause listed above RPM are less than rated Excessive amount of water by...

Page 22: ...HF SERIES Serial 10127003 and Later GENERAL PUMP A member of the Interpump Group Page 22 16 EXPLODED VIEW AND PARTS LIST Ref 300764 Rev F 05 21 102 103 ...

Page 23: ... F94739700 Valve Spring Suction 3 54 91515500 Back up Ring Ø23 9 x 28 x 2 HF18A 3 F90517700 Back up Ring Ø30 x 34 x 1 5 HF20A 22A 25A 55 F36204966 Valve Seat Suction HF18A 3 F36204266 Valve Seat Suction HF20A 22A 25A 56 90357600 O ring Ø 6 75 x 1 78 3 57 F98197200 Plug G 1 8 x 8 3 58 F36713901 Valve Assembly Delivery 3 59 F36714401 Valve Assembly Suction HF18A 3 F36713801 Valve Assembly Suction HF...

Page 24: ...HF SERIES GENERAL PUMP A member of the Interpump Group Page 24 Serial 10127003 and Later Ref 300764 Rev F 05 21 ...

Page 25: ...ew M12x25 1 54 F71223074 Lifting Bracket 1 55 F90924300 Babbitt Bearing Non load Side 3 F90924400 Babbitt Bearing Non load Side 0 25 F90924500 Babbitt Bearing Non load Side 0 50 56 F71020035 Crankshaft 1 57 F91500000 Tab 12 x 8 x 70 1 58 F71150022 PTO Side Cover 1 59 F90170000 Oil Seal Ø 50 x 65 x 8 1 60 F90060600 Ring Ø 20 6 61 F97743000 Pin Ø 20 x 38 3 62 F71050715 Plunger Guide 3 63 F90924000 B...

Page 26: ...ater GENERAL PUMP A member of the Interpump Group 17 FLUSHING CIRCUIT DIAGRAM OF USE Adhere to the following valves for proper system operations minimum circuit flow rate 4 l min maximum fluid pressure 87 02 PSI 6 bar Ref 300764 Rev F 05 21 ...

Page 27: ...R REPLACEMENT VALVE REPLACEMENT HOURS DATE GP Companies Inc 1174 Northland Drive Mendota Heights MN 55120 Phone 651 686 2199 Fax 800 535 1745 www generalpump com email sales gpcompanies com Serial 10127003 and Later GENERAL PUMP A member of the Interpump Group Ref 300764 Rev F 05 21 ...

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