MK Owner’s Manual • Installation • Use • Maintenance General Pump is a member of the Interpump Group Ref 300669 Rev.
GENERAL PUMP INDEX 1. 2. 3. 4. A member of the Interpump Group MK SERIES INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 4 SYMBOL DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 4 SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 3.1 General safety instructions . . . . . . . . . . . . . . . . . . . . . .
GENERAL PUMP INDEX (continued) 13. A member of the Interpump Group MK SERIES PRECAUTIONS AGAINST FREEZING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 15 14. WARRANTY TERMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 15 16. EXPLODED VIEWS AND PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 17-20 15 17. TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GENERAL PUMP 1. INTRODUCTION A member of the Interpump Group This manual describes the use and maintenance instructions of the MK pump, and should be carefully read and understood before using the pump. Correct use and adequate maintenance will guarantee the pumps trouble-free operation for a long time. General Pump declines any responsibility for damage caused by misuse or the non-observance of the instructions indicated in this manual.
GENERAL PUMP MK SERIES A member of the Interpump Group 3.3 Safety of Operation (continued) 2. That pump intake filters are perfectly clean; we advise to use a device that indicates the filters clogging level. 3. That electrical parts are adequately protected and in perfect condition. 4. That high pressure hoses do not show apparent signs of abrasion, and that fittings are in perfect shape.
GENERAL PUMP 5. TECHNICAL FEATURES MODEL RPM MK40A 1500/1800 MK45A MK SERIES A member of the Interpump Group FLOW RATE PRESSURE GPM l/min 151 5800 400 159 118 1500/1800 50.0 190 4350 300 149 111 MK50A 1500/1800 62.0 235 3625 250 154 115 MK55A 1500/1800 75.0 283 2900 200 149 111 MK60A 1500/1800 90.0 340 2465 170 152 112.5 MK65A 1500/1800 107.0 406 2175 150 160 116 40.0 PSI Bar Hp POWER kW 6.
GENERAL PUMP A member of the Interpump Group 6. DIMENSIONS AND WEIGHT (cont.) MK SERIES For dimensions and weight of MK55A, MK60A and MK65A pumps, please refer to fig. 2a. Weight: 862 Lbs./391 Kg. fig. 2a For dimensions of MK40A, MK45A and MK50A pumps with Hydraulic Pack, please refer to fig. 2b. fig. 2b Ref 300669 Rev.
GENERAL PUMP A member of the Interpump Group 6. DIMENSIONS AND WEIGHT (cont.) MK SERIES For dimensions MK55A, MK60A and MK65A pumps with Hydraulic Pack, please refer to fig. 2c. fig. 2c Ref 300669 Rev.
GENERAL PUMP A member of the Interpump Group 7.INFORMATION ABOUT PUMP USE The MK pump has been designed to operate with filtered water (see paragraph 9.7) and at maximum temperature of 1040 F (400 C). Other fluids may be used only upon the approval of The Customer Service Department . MK SERIES Check the oil level by using the oil level dipstick (1), fig. 3. Refill if needed from the oil cap (3), fig 3.
GENERAL PUMP A member of the Interpump Group 8. PORTS AND CONNECTIONS MK Series pumps (see fig. 4 and 4a) are provided with: 1. 2 inlet ports “IN”, 2” NPT (MK40A, MK45A, MK50A). 2 inlet ports “IN”, 3” NPT (MK55S, MK60A, MK65A). The line can be connected to either of the two inlet ports; the ones not being used must be hermetically sealed. 2. 2 outlet ports “OUT”, Ø 1” NPT-F (MK40A, 45A, 50A). 2 outlet ports “OUT”, Ø 1-1/4” NPT-F (MK55A, 60A, 65A). 3.
GENERAL PUMP A member of the Interpump Group 9.3 Version Change and Reducer Positioning A right version pump is defined when: observing the pump from the head side, the PTO shank of the pump shaft is on the right side. A left version pump is defined when: observing the pump from the head side, the PTO shank is on the left side. See fig. 5. The version may be changed only by specialized and authorized personnel by carefully following the instructions in the repair manual.
GENERAL PUMP A member of the Interpump Group 9.7 Filtering On the suction line, install two filters as indicated in fig. 7 and fig. 7/a. With the manual adjustment valve: With the pneumatic adjustment valve: The filter must be installed as close as possible to the pump, should allow easy inspection and have the following characteristics: 1. Minimum capacity 3 times greater than the pump’s rated flow value. 2. Filter port diameters must not be smaller than the pump inlet ports. 3.
GENERAL PUMP A member of the Interpump Group MK SERIES The suction line is connected and up to pressure (see Chapter 9) the pump must never run dry. 1. The suction line must be perfectly airtight. 2. All the On-Off valves between the pump and the feeding source are completely open. The delivery line must discharge freely in order to allow the air in the pump to be expulsed easi ly, thus facilitating pump priming. 3. All suction/delivery connections and fittings must be correctly tightened. 4.
GENERAL PUMP A member of the Interpump Group MK SERIES 11. PREVENTIVE MAINTENANCE To guarantee pump reliability and efficiency, respect the maintenance intervals as indicated in the table below. PREVENTIVE MAINTENANCE EVERY 500 HOURS EVERY 1000 HOURS Check oil level Change oil Check / Replace: • Valves • Valve seats • Valve springs • Valve guides 10.2 Start-up 1. When starting the pump for the first time, check for the correct direction of rotation. 2. The pump must be started off-load. 3.
GENERAL PUMP A member of the Interpump Group 13. PRECAUTIONS AGAINST FREEZING In areas and periods of the year where there is risk of freezing, follow the instructions indicated in Chapter 12 (see paragraph 12.2). In the presence of ice, in no case must the pump be started until the entire circuit has been completely thawed out; not complying with this indication may cause serious damage to the pump. 14.
GENERAL PUMP A member of the Interpump Group 15. TROUBLESHOOTING (continued) MK SERIES Overheated pump: • The pump is overloaded (pressure or RPM exceed the rated values) • Oil level is too low, or the oil is not of a suit able type, indicated in Chapter 7 (see para graph 7.
GENERAL PUMP A member of the Interpump Group 16. EXPLODED VIEW AND PARTS LIST MK45 SERIES Ref 300669 Rev.
GENERAL PUMP Item 1 2 Part # Description F74120715 Manifold, MK40A F74120515 F10744401 3 F36206766 4 F90526000 5 F90389000 7 F36208801 8 F94760000 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 F36206151 F36715101 F74210651 F90358400 F98204600 F36206966 F90526500 F90527600 F90391100 F94760500 F36715301 F74211070 F90528000 F94775000 F74210866 F74210315 F99522200 F99514700 F99385000 F96710500 F90410200 F74211156
16. EXPLODED VIEW AND PARTS LIST Page 19 Ref 300669 Rev.
GENERAL PUMP Item 1 2 3 Part # Description F10744301 Suction Valve Device F74120415 F36206666 4 F90527000 5 F90410500 7 F36208701 8 F94769800 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 F36206051 F36715001 F74210551 F90358400 F98204600 F36206866 F90527300 F90529000 F90413400 F94770000 F36715201 F74210970 F90529300 F94800000 F74210766 F74210115 F99522200 F99514700 F99385000 F96710500 F90418500 F74211456 F742
GENERAL PUMP MAINTENANCE LOG A member of the Interpump Group MK SERIES HOURS & DATE OIL CHANGE GREASE PACKING REPLACEMENT PLUNGER REPLACEMENT VALVE REPLACEMENT 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 Ref 300669 Rev.
