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107-B00    Page 8/16 

MAINTENANCE

VANE REPLACEMENT 

 

NOTICE: 

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

 

1.  Flush the pump per instructions in this manual. Drain and 

relieve pressure from the pump and system as required.  

2.  Remove the head assembly from the 

outboard

 

(nondriven) side of the pump according to steps 4 - 8 in 
the "Pump Disassembly" section of this manual. 

3.  Turn the shaft by hand until a vane comes to the top (12 

o'clock) position of the rotor. Remove the vane. 

4.  Install a new vane, ensuring that the rounded edge is UP, 

and the relief grooves are facing towards the direction of 
rotation. See Figure 4. 

5.  Repeat steps 3 and 4 until all vanes have been replaced. 

This method of vane installation ensures the push rods do 
not fall out of their rotor slots. 

6.  Reassemble the pump according to the "Pump 

Assembly." section of this manual. 

 

Figure 4 – Vane Replacement 

 
 

PUMP DISASSEMBLY 

NOTICE: 

Follow all hazard warnings and instructions provided in 
the “maintenance” section of this manual. 
 
NOTE: 

The numbers in parentheses following individual parts 

indicate reference numbers on the Pump Parts List. 
 
1.  Flush the pump per instructions in this manual. Drain and 

relieve pressure from the pump and system as required. 

2.  Starting on the 

inboard

 (driven) end of the pump, clean 

the pump shaft thoroughly, making sure the shaft is free 
of nicks and burrs. This will prevent damage to the 
mechanical seal when the inboard head assembly is 
removed. 

3.  Remove the inboard bearing cover capscrews (28) and 

slide the inboard bearing cover (27A) and gasket (26) off 
the shaft. Discard the bearing cover gasket. On 2-inch 
pump models, the dirt shield will slide off with the bearing 
cover. 

4.  Remove the outboard bearing cover capscrews (28) and 

slide the outboard bearing cover (27) and gasket (26) off 
the shaft. Discard the bearing cover gasket. 

5.  To remove locknuts and lockwashers (24A and 24B):  

a.  Bend up the engaged lockwasher tang and rotate the 

locknut counterclockwise to remove it from the shaft. 

b.  Slide the lockwasher off the shaft. Inspect the 

lockwasher for 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.  On 4-inch models, remove the disc from the head by 

removing the disc machine screws (71A) and 
lockwashers (71B).  The mechanical seal rotating 
assembly (153B, 153C, 153E) will be released when 
the disc is removed. 

b.  Pull the bearing (24) from the housing in the head. 

c.  To remove the mechanical seal stationary seat 

(153A), use the blunt end of a screw driver to gently 
push the backside of the stationary seat from the 
head. Place a cloth under the seal to avoid damage. 
Be careful not to contact the polished face of the seal 
during removal. Remove and discard mechanical seal 
stationary O-ring. 

8.  On 2 and 3-inch models, carefully pull the rotating seal 

assembly, including seal jacket (153C), rotating seal face 
and rotating O-ring (153B & 153E) from the shaft. 
Remove and discard the rotating O-ring. Remove the disc 
(71). 

9.  Pull the rotor and shaft (13) from the casing. While one 

hand is pulling the shaft, the other hand should be 
cupped underneath the rotor to prevent the vanes (14) 
and pushrods (77) from falling out. Carefully set the rotor 
and shaft aside for future vane replacement and 
reassembly. 

10. Lay the pump flat with the remaining head facing upward 

to remove the outboard head assembly, mechanical seal 
and disc from the outboard side of the pump, as 
instructed in steps 6 - 8. 

11. If necessary, remove the liner (41) by tapping around the 

outside diameter of the liner with a hard wood drift and a 
hammer until it is driven from the casing. 

 

PARTS REPLACEMENT 

1.  If any of the O-rings have been removed or disturbed 

during disassembly, they be replaced with new O-rings.  

NOTE: 

PTFE O-rings should be heated in hot water to aid 

installation. 

2.  Excessive or continuous leakage from the tell-tale hole in 

the bearing cover may be an indication of a damaged 
mechanical seal. If a mechanical seal has been leaking, it 
is recommended the entire seal be replaced. Refer to 
"General Pump Troubleshooting" for possible causes of 
seal leakage. 

 

Содержание XL2B

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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