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107-B00    Page 7/16 

MAINTENANCE 

 

 

Failure to disconnect and lockout 
electrical power or engine drive 
before attempting maintenance can 
cause severe personal injury or death 

Hazardous 

machinery can 

cause serious 

personal injury.

 

 

 

 

Failure to disconnect and lockout 
electrical power before attempting 
maintenance can cause shock, burns 
or death 

Hazardous voltage. 

Can shock, burn or 

cause death. 

 

 

 

Failure to relieve system pressure 
prior to performing pump service or 
maintenance can cause personal 
injury or property damage. 

 

Hazardous pressure 

can cause personal 

injury or property 

damage 

 

 

 

Disconnecting fluid or pressure 
containment components during pump 
operation can cause serious personal 
injury, death or major property damage 

 

Hazardous pressure 

can cause personal 

injury or property 

damage 

 

 

 

If pumping hazardous or toxic fluids, 
system must be flushed and 
decontaminated, inside and out, prior 
to performing service or maintenance 

 

Hazardous or toxic 

fluids can cause 

serious injury. 

 
 

NOTICE: 

Maintenance shall be performed by qualified technicians 
only.  Follow the appropriate procedures and warnings 
as presented in this manual. 

SCHEDULED MAINTENANCE 

 

LUBRICATION 

NOTICE: 

To avoid possible entanglement in moving parts do not 
lubricate pump bearings, gear reducer or any other parts 
while the pump is running

.

 

NOTICE: 

If pumps are repainted in the field, ensure that the 
grease relief fittings (76A) are functioning properly after 
painting.  Do NOT paint them closed.  Remove any 
excess paint from the fittings. 

 
Pump bearings should be lubricated every one to twelve 
weeks (AT MINIMUM), depending on the application, and 
operating conditions. 

Recommended Grease: 
Mobil® - Mobilgrease XHP222, 
Exxon® - RONNEX MP Greas

e, 

or equivalent. 

Greasing Procedure: 

1.  Remove the grease relief fittings (76A) from the bearing 

covers (27A).  

2. 

SLOWLY 

apply grease with a hand gun until grease 

begins to escape from the grease relief fitting port.  

3.  Replace the grease relief fittings (76A). 

DO NOT overgrease pump bearings. While it is normal for 
some grease to escape from the grease tell-tale hole after 
lubrication, excessive grease on pumps equipped with 
mechanical seals can cause seal failure. 
 
IF EQUIPPED: Blackmer gear reducers are shipped from the 
factory without oil in the gearcase. Fill with the grade of oil 
indicated on the reducer tag. The oil should be changed after 
the first 48 hours of use and approximately every 500 hours 
of use thereafter. 
 
 

STRAINERS 

Strainers must be cleaned regularly to avoid pump starvation.  
Schedule will depend upon the application and conditions. 
 

Summary of Contents for XL2B

Page 1: ... inch 107 B01 107 B02 SAFETY DATA This is a SAFETY ALERT SYMBOL When you see this symbol on the product or in the manual look for one of the following signal words and be alert to the potential for personal injury death or major property damage Warns of hazards that WILL cause serious personal injury death or major property damage Warns of hazards that CAN cause serious personal injury death or ma...

Page 2: ...ference If replacement parts are needed or if information pertaining to the pump is required this data must be furnished to a Blackmer representative TECHNICAL DATA 2 3 inch 4 inch Maximum Pump Speed 780RPM 640 RPM Maximum Operating Temperature 240 F 115 C Maximum Differential Pressure 150 psi 10 3 Bar Maximum Working Pressure 350 psi 24 1 Bar Technical Data is for standard materials of constructi...

Page 3: ...t elevated temperature provisions should be made to compensate for expansion and contraction of the pipes especially when long pipe lines are necessary Steel pipe expands approximately 3 4 1 9 cm per 100 feet 30 49 m per 100 F 37 8 C rise in temperature PUMP MOUNTING A solid foundation reduces noise and vibration and will improve pump performance On permanent installations it is recommended the pu...

Page 4: ...ry death or major property damage Hazardous pressure can cause personal injury or property damage Failure to relieve system pressure prior to performing pump service or maintenance can cause personal injury or property damage Hazardous pressure can cause personal injury or property damage Pumps operating against a closed valve can cause system failure personal injury and property damage Hazardous ...

Page 5: ... within the expected conditions Record pressures in the Initial Start Up Information section 3 Check for leakage from the piping and equipment 4 Check for overheating excessive noise or vibration of the pump reducer and motor 5 Check the flow rate to ensure the pump is operating within the expected parameters Record flow rate in the Initial Start Up Information section 6 Check the pressure setting...

Page 6: ...sure control valve XL series pumps are fitted with an internal pressure relief valve that bypasses back to the suction side of the pump Pumping volatile liquids under suction lift may cause cavitation Partial closing of the discharge valve WILL result in internal relief valve chatter and is NOT recommended For these applications install an external system pressure control valve and any necessary b...

Page 7: ... avoid possible entanglement in moving parts do not lubricate pump bearings gear reducer or any other parts while the pump is running NOTICE If pumps are repainted in the field ensure that the grease relief fittings 76A are functioning properly after painting Do NOT paint them closed Remove any excess paint from the fittings Pump bearings should be lubricated every one to twelve weeks AT MINIMUM d...

Page 8: ...or damage and replace as required c Repeat steps a and b on the opposite shaft end 6 Remove the head capscrews 21 Gently pry the head away from the casing using two large screwdrivers The head O ring should come off with the head assembly 7 Slide the head and O ring off the shaft The bearing 24 mechanical seal stationary seat and stationary O ring 153A 153D will come off with the head assembly a O...

Page 9: ...bottom vanes and push rods are installed carefully insert the non driven end of rotor and shaft into the casing d Install the remaining vanes into the top positions of the rotor 7 DISC 2 and 3 inch Models Install the disc 71 on the inboard side of the pump with the seal cavity facing outward and the disc relief hole located as shown in Figure 6 Figure 6 Disc Relief Hole Location 2 and 3 inch Model...

Page 10: ...he head capscrews to 30 lbs ft 40 7 Nm alternating between one side of the head and the other Frequently check that the shaft still turns freely If tight loosen the capscrews and repeat the procedure If the shaft continues to bind check for grease or dirt on the mechanical seal faces Figure 9 Locknut Assembly 20 LOCKNUT ADJUSTMENT It is important that the bearing locknuts 24A and lockwashers 24B b...

Page 11: ...uide 7 against the valve c Attach a new relief valve O ring 10 and the valve cover 4 on the cylinder d Screw the relief valve adjusting screw 2 with locknut 3 into the valve cover 4 until it makes contact with the spring guide 7 e After the relief valve has been adjusted tighten the Locknut 3 and install the relief valve cap 1 and O ring 88 NOTICE The relief valve setting MUST be tested and adjust...

Page 12: ...otor and brake windings to verify the integrity of the winding insulation and inspect all terminal box openings and wire connection areas to verify that all components are dry and free of corrosion Long Term Storage By taking special precautions problems such as seal leakage and reducer failure due to the lack of lubrication improper lubrication quantity or contamination can be avoided The followi...

Page 13: ...alphaolefin Oil FG Food Grade Oil NOTICE The Ambient Temperature is intended to be an operation guideline based upon the typical properties of all the lubricant The viscosity and other properties of the lubricant change based upon load speed ambient conditions and reducer operating temperatures The user should consult with their lubrication supplier NORD gear before considering changes in oil type...

Page 14: ...Liquids that set up when inactive OVERHEATING Probable Cause Corrective Action Continual full bypassing of the liquid Adjust the relief valve such that the pump will not bypass during normal operation WARNING Internal bypassing of liquid elevates the liquid temperature The internal bypass valve should only be used for brief periods and at differential pressures below 125 psi For extended periods o...

Page 15: ...rn vanes discs or rotor Bearing Worn or Damaged Loose or improperly installed piping Misalignment of pump and driver or bent shaft Pump base not properly mounted Insufficient Oil in the Gear Reducer POOR OR NO PRIMING Probable Cause Air leaks in the suction line Valve partially closed or other restriction in the suction line Damaged or worn pump parts Too much lift for the vapor pressure of the fl...

Page 16: ...cked cut or twisted Shaft at seal area damaged worn or dirty Excessive cavitation Mechanical seal faces cracked scratched pitted or dirty Ball bearings overgreased MOTOR OVERLOAD Probable Cause Horsepower of motor not sufficient for application Improper wire size wiring and or voltage to motor Misalignment in pump drive system Bearing locknuts adjusted improperly Excessive viscosity pressure or sp...

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