General Pump MW User Manual
MW/S
8
Owner’s Manual
• Installation
• Use
• Maintenance
General Pump
is a member of
the Interpump Group
MWS45A-MWS50A-MWS55A
MW32A-MWS36A-MWS40A
Ref 300790 Rev.D
11-12
GENERAL PUMP
INDEX
1. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 3
2. DESCRIPTION OF SYMBOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 3
3. SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 4
3.1 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 4
3.2 High pressure unit safety requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 4
3.3 Safety during operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 4
3.4 General procedures for using nozzles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 4
3.5 Safety during unit maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 5
4. PUMP IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 5
5. TECHNICAL CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 6
6. DIMENSIONS AND WEIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 7
7. OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 8
7.1 Water temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 8
7.2 Maximum flow and pressure rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 8
7.3 Minimum RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 8
7.4 Recommended lubricant types and Manufacturers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 8-9
A member of the Interpump Group
MW/S SERIES
8. PORTS AND CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 10
9. PUMP INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 11
9.1 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 11
9.2 Direction of rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 12
9.3 Version change and reducer positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 12
9.4 Hydraulic connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 13
9.5 Pump power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 13
9.6 Suction line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 14
9.7 Filtration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 14
9.8 Outlet line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 15
9.9 Internal diameter of hose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 16
9.10 V-belt transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 17
10. START UP AND OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 17
10.1 Preliminary inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 17
10.2 Starting up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 18
11. PREVENTATIVE MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 18
12. PUMP STORAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 19
12.1 Filling the pump with anti-corrosion emulsion or anti-freeze . . . . . . . . . . . . . . . . . . . . . . . . . .Page 19
12.2 Hoses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 19
13. PRECAUTIONS AGAINST FREEZING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 19
14. WARRANTY TERMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 19
15 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 20
16. EXPLODED VIEWS AND PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 21-32
17. REPAIR TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 33
18. MAINTENANCE LOG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 34
Ref 300790 Rev.D
11-12
Page 2
GENERAL PUMP
A member of the Interpump Group
MW/S SERIES
1. INTRODUCTION
This manual describes the use and maintenance instructions of the MW/S 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.
Upon receiving the pump, check that it is complete and in perfect condition. Should anything be found out of order, please
contact us before installing and starting the pump.
2. SYMBOL DESCRIPTIONS
Warning
Potential Danger
Read carefully and understand
the manual before operating
the pump
Danger
High Voltage
Danger
Wear protective mask
Danger
Wear goggles
Danger
Wear protective gloves
Danger
Wear protective boots
Ref 300790 Rev.D
11-12
Page 3
GENERAL PUMP
A member of the Interpump Group
MW/S SERIES
3. SAFETY
3.1 General Safety Indications
Improper use of pumps and high pressure systems, and the non-compliance with installation and maintenance
instructions may cause severe injury to people and/or damage to property. Anyone assembling or usinge high pressure
systems must possess the necessary competence to do so, should be aware of the characteristics of the components
assembled/used, and must take all precautions necessary to ensure maximum safety in any operating condition. In the
interest of safety, both for the Installer and the Operator, no reasonably applicable should be omitted.
3.2 High pressure unit safety requirements
1. The pressure line must always be equipped with a safety valve.
2. High pressure system components, in particular for those units working outside, must be adequately
protected against rain, frost and heat.
3. The electrical control system must be adequately protected from water spray, and must comply with the
specific regulations in force.
4. High pressure hoses must be properly sized for maximum operating pressure of the system and always and only
used within the operating pressure range specified by the hose manufacturer. The same rules should be observed
for all other auxiliary systems affected by high pressure.
5. The ends of high pressure hoses must be sheathed and secured to a solid structure to prevent dangerous
whiplash in case of bursting or broken connections.
6. Appropriate safety guards must be provided for the pump transmission systems (couplings, pulleys and belts,
auxiliary drives).
3.3 Safety During Operation
The working area of a high pressure system must be clearly marked. Access must be prohibited to un-authorized
personnel and, wherever possible, the area should restricted or fenced. The personnel authorized to access this area
should first be trained, and informed about the risks that may arise from failures or malfunctions of the high pressure unit.
Before starting the unit, the operator must check:
1. That the high pressure system is properly powered (see paragraph 9.5).
2. That pump intake filters are perfectly clean; we advise the use of a device that indicates the filters clogging level.
3. Electrical parts are adequately protected and in perfect condition.
4. The high pressure hoses do not show apparent signs of abrasion, and that fittings are in perfect shape.
Any fault or reasonable doubt that may arise before or during operation should be promptly reported and verified by
competent personnel. In these cases, pressure should immediately be released and the high pressure system stopped.
3.4 General Procedures For Using Nozzles
1. The Operator must always place his own and other worker’s safety before any other interest; his and should always
be governed by good sense and responsibility.
2. The Operator must always wear a helmet with a protective visor, waterproof clothing, and appropriate boots capable
of guaranteeing grip on wet pavement.
Ref 300790 Rev.D
11-12
Page 4
GENERAL PUMP
Note: appropriate clothing will effectively protect against water spray, but it may not offer adequate protection against the
direct impact of water jets or sprays from a close distance. Some circumstances may require further protection.
3. It is generally best to organize personnel into teams of at least two people capable of giving mutual and immediate
assistance in case of necessity and of taking turns during long and demanding operation.
4. Access to the work area that is within the water jets’ range must be absolutely prohibited to and free from objects
that, inadvertently under a pressure jet, can be damaged and or create dangerous situations.
5. The water jet must only and always be directed in the direction of the work area, including during testing or
preliminary tests or checks..
6. The Operator must always pay attention to the trajectory of the debris removed by the water jet. If necessary,
suitable guards must be provided by the Operator to protect anything that may be accidentally exposed.
7. The Operator should not be distracted for any reason during operation. Workers needing to access the operating
area must wait for the Operator to stop work, and then immediately make their presence known.
8. For safety reasons, it is important that each member of the team is fully aware of the intentions and actions of
other team members in order to avoid dangerous misunderstandings.
9. The high pressure system must not be started up and run under pressure without all team members in position
and without the Operator having already directed his/her lance toward the work area.
3.5 Safety During System Maintenance
1. The pressure system meintenance must be carried out in the time intervals set by the manufacturer who is
responsible for the whole group according to law.
2. Maintenance should always be carried out by trained and authorized personnel.
3. Assembly and disassembly of the pump and its various components must be performed exclusively by authorized
personnel, using appropriate equipment in order to avoid damage to components and connections.
4. Always use original spare parts to ensure total reliability and safety.
A member of the Interpump Group
MW/S SERIES
4. PUMP IDENTIFICATION
Each pump has a specific label which contains:
Pump model and version
Serial Number
Flow Rate - GPM
Pressure - PSI
Power - Hp-kW
Maximum RPM
Pump model, version and serial number must always
be specified when ordering spare parts.
Ref 300790 Rev.D
11-12
Page 5
GENERAL PUMP
5. TECHNICAL FEATURES
A member of the Interpump Group
MW/S SERIES
MODEL RPM
MW32A 1500/1800/2200 36.0 136 4350 300 106 79
MWS36A 1500/1800/2200 45.5 172 3900 269 121 90
MWS40A 1500/1800/2200 56.0 213 3050 210 117 87
MWS45A 1500/1800/2200 71.0 269 2500 172 121 90
MWS50A 1500/1800/2200 87.5 333 2000 138 119 88
MWS55A 1500/1800/2200 105.5 400 1450 100 104 77.5
FLOW RATE PRESSURE POWER
GPM l/min PSI Bar Hp kW
Ref 300790 Rev.D
11-12
Page 6
GENERAL PUMP
6. DIMENSIONS AND WEIGHT
For dimensions and weight of MW32A, MWS36A and MWS40A pumps, please refer to fig. 2.
A member of the Interpump Group
MW/S SERIES
Weight: 540 Lbs./244 Kg.
For dimensions and weight of MWS45A, MWS50A and MWS55A pumps, please refer to fig. 2a.
fig. 2
Weight: 540 Lbs./245 Kg.
fig. 2a
Ref 300790 Rev.D
11-12
Page 7
GENERAL PUMP
A member of the Interpump Group
MW/S SERIES
7.INFORMATION ABOUT PUMP USE
The MW/S pump was designed to operate with filtered water (see paragraph 9.7) and at
maximum temperature of 1040F (400C).
Other fluids may be used only upon the approval of The Customer Service Department .
7.1 WaterTemperature
The max water temperature is 1040F (400C).However, it is possible to use the pump at temperatures of up
0
to 140
Department.
7.2 Max Flow Rate and Pressure Values
The performance values indicated in the catalog refer to the maximum performance of the pump. Regardless of the power
used, pressure and maximum RPM values indicated on the plate may not be exceeded unless expressly authorized by the
Customer Service Department.
F (600C) for short periods of time. In this case we advise consulting the Customer Service
7.3 Lowest RPM
Any RPM value different from what is indicated in the performance table (see chapter 5) must be expressly authorized by
the Customer Service Department.
7.4
Recommended Lubricant Oil Types & Manufacturers
The pump is delivered with lubricant oil compliant with room temperatures ranging between 320and 89.60F (00and
300C ). Some recommended lubricant types are indicated in the table below; these lubricants are treated with additives
in order to increase corrosion protection and resistance to fatigue. As an alternative, Automotive SAE 85W-90 gearing
lubricants may also be used.
Check the oil level by using the oil level dipstick (1), fig. 3.
Refill if necessary to top off level. Correct oil level inspection is done with the pump at room temperature; oil is
changed with the pump at working temperature, by remov-
BRAND TYPE
GENERAL PUMP SERIES 220
ARAL Aral Degol BG220
BP ENERGOL HLP 220
CASTROL
ELF
ESSO NUTO 220
FINA Cirkan 220
FUCHS RENOLIN 220
MOBIL DTE OIL BB
SHELL TELLUS C 220
TEXACO RANDO HD 220
TOTAL CORTIS 220
Hyspin VG 220, Magna
POLYTELIS 220
220
ing the rear plug (2), fig 3..
Checking and changing oil is to be carried out as indicated
in Chapter 11. The amount required is 304 oz. (9 liters).
Ref 300790 Rev.D
11-12
Page 8
GENERAL PUMP
In any case, oil must be changed at least once a year since it may deteriorate by oxidation.
For room temperatures that differ from that mentioned earlier, follow the indications contained in the diagram
below, keeping in mind that the oil must have a minimum viscosity of 180 cSt.
A member of the Interpump Group
MW/S SERIES
VISCOSITY/ROOM TEMPERATURE DIAGRAM
Exhausted oil must be collected in an appropriate recipient and disposed of in appropriate
locations. In absolutely no case may it be dispersed into the environment.
Ref 300790 Rev.D
Page 9
11-12
GENERAL PUMP
A member of the Interpump Group
MW/S SERIES
8. PORTS AND CONNECTIONS
MW/S Series pumps are equipped with (see fig. 4 and 4a):
1. 2 inlet ports “IN”, 2” NPT (MW32A, MWS36A, MWS40A).
2 inlet ports “IN”, 2-1/2” NPT (MWS45A, MWS50A, MWS55A).
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 (MW32A, MW36A, MW40A).
2 outlet ports “OUT”, Ø 1-1/4” NPT-F (MW45A, MW50A, MW55A).
3. 1 drain port “DRAIN” with G1/2” hole in the lower cover to moniter any water leakage due to wear of the pressure
packings. In case of leaks, please consult the repair manual.
This hole must always be kept open.
Ref 300790 Rev.D
11-12
Page 10
GENERAL PUMP
A member of the Interpump Group
MW/S SERIES
9. PUMP INSTALLATION
9.1 Installation
The pump must be installed in a horizontal position using the M16 threaded support feet.
Tighten the screws with a torque of 200 Nm (147.5 Ft-Lb)
The base must be perfectly flat and rigid enough as not to allow bending or misalignment on the pump coupling and
axis/transmission due to torque transmitted during operation.
Two lifting brackets are mounted on the pump for easy installation, as per the figure below.
The brackets are sized soley for pump lifting and therefore are absolutely not permitted for use
of additional loads.
Replace the oil filling hole closing service plug positioned on the rear casing cover with the
plug with oil dipstick. Check the correct quantity.
The dipstick must always be reachable, even when the unit is assembled.
The pump’s shaft (PTO) must not be rigidly connected to the motor unit.
The following transmission types are suggested:
• Flexible joint
• Cardan Joint (please respect the maximum working angles indicated by the manufacturer)
• Belts; for correct application, please contact the Customer Service Department.
Ref 300790 Rev.D
11-12
Page 11
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