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Dover PSG BLACKMER MLN4B, Installation, Operation And Maintenance Instructions, Page: 1 / 20

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Dover PSG BLACKMER MLN4B Installation, Operation And Maintenance Instructions Download Page 1

BLACKMER POWER PUMPS 

966909

 

INSTRUCTIONS NO. 106-A00 

INSTALLATION OPERATION AND MAINTENANCE INSTRUCTIONS 

MODELS: MLX4B, MLXW4B, MRLX4B, MRLXW4B 

MLN4B, MRLN4B

 

Section 

Effective 

Replaces 

106 
Jan 2014 
Aug 2010 

 

 

TABLE OF CONTENTS 

Page 

PUMP DATA

 

 Technical 

Data ........................................................ 2

 

Initial Pump Start Up Information ............................. 2

INSTALLATION

 

 Pre-Installation Cleaning ......................................... 3
 Location 

and 

Piping ................................................. 3

 Pump 

Mounting ....................................................... 3

 Coupling 

Alignment ................................................. 4

 Pump 

Rotation......................................................... 4

 

To Reverse Pump Rotation ..................................... 4

 Check 

Valves .......................................................... 4

 Optional 

Jacketed Heads ........................................ 4

 Manual 

Bypass Valve .............................................. 4

OPERATION

 

 

Pre-Start Up Check List ........................................... 5

 

Start Up Procedures ................................................ 5

 

Running the Pump in Reverse Rotation .................. 5

 Flushing 

the Pump .................................................. 6

 Pump 

Relief Valve ................................................... 6

 

Relief Valve Setting and Adjustment ....................... 6

MAINTENANCE      .............. M(R)LX(W)4B ........ M(R)LN4B

Lubrication      .................... 7        ......................... 12
Vane Replacement      ....... 8        ......................... 12
Pump Disassembly      ....... 8        ......................... 13
Pump Assembly      ............ 9        ......................... 14

TROUBLE SHOOTING

 ................................................... 16

NOTE

: Numbers in parentheses following individual parts 

indicate reference numbers on Blackmer Parts List No.  
106-A01 for MLX4B, MLXW4B, MRLX4B, MRLXW4B and 
106-A02 for MLN4B, MRLN4B. 

Blackmer pump manuals and parts lists may be obtained 
from Blackmer's website (www.blackmer.com) or by 
contacting Blackmer Customer Service.

 

 

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 major property damage. 

 

Warns of hazards that CAN cause personal injury  

or property damage. 

NOTICE: 

Indicates special instructions which are very  

important and must be followed. 

 

 
 

NOTICE: 

 

Blackmer Pumps

 MUST

 only be installed in systems, which 

have been designed by qualified engineering personnel.  
The system 

MUST

 conform to all applicable local and 

national regulations and safety standards. 
 
This manual is intended to assist in the installation and 
operation of the Blackmer ML4B Series pumps, and 

MUST

 

be kept with the pump. 
 
Pump service shall be performed by qualified technicians 

ONLY

.  Service shall conform to all applicable local and 

national regulations and safety standards. 
 
Thoroughly review this manual, all instructions and hazard 
warnings, 

BEFORE

 performing any work on the pump. 

 
Maintain 

ALL

 system and pump operation and hazard 

warning decals. 
 

 

Summary of Contents for PSG BLACKMER MLN4B

Page 1: ...mer com or by contacting Blackmer Customer Service 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 seriou...

Page 2: ...DENTIFICATION A pump identification tag containing the pump serial number I D number and model designation is attached to each pump Record and file the data from this tag for future reference If replacement parts are needed or if information pertaining to the pump is required this data must be furnished to a Blackmer representative MLX4B Full size liner External Ball Bearings MLXW4B MLX4B w Wear r...

Page 3: ...ea of at least four times the area of the intake piping Strainers must be cleaned regularly to avoid pump starvation 4 The intake system must be free of air leaks 5 Expansion joints placed at least 36 0 9m from the pump will compensate for expansion and contraction of the pipes Contact the flexible connector hose manufacturer for required maintenance care and design assistance in their use 6 Insta...

Page 4: ...ation and create undue stress on all attached components Never start a pump when it is rotating in the reverse rotation as the added starting torque can damage the pump and related equipment OPTIONAL JACKETED HEADS Hot oil or steam can be circulated through jacketed heads by connections at the NPT pipe plugs directly above and below the shaft for heating highly viscous liquids or to thaw out liqui...

Page 5: ...ns provided These can be used to check actual suction and discharge conditions after pump start up 6 Check the wiring of the motor and briefly turn on the power to make sure that the pump rotates in the direction of the rotation arrow START UP PROCEDURES NOTICE Consult the General Pump Troubleshooting section of this manual if difficulties during start up are experienced 1 Start the motor Priming ...

Page 6: ... the pump or pumping system from excessive pressure The valve is not meant to be used for prolonged recirculation When pumping highly volatile liquids under a high suction lift and cavitation or starving of the pump exists partial closing of the discharge valve will result in excessive noise in the relief valve Plumbing the relief valve so flow is directed back to the storage tank is recommended w...

Page 7: ...ANCE STRAINERS Strainers must be cleaned regularly to avoid pump starvation Schedule will depend upon the application and conditions 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 a...

Page 8: ...use of wire hooks carefully pull the rotating seal assembly jacket seal face O ring 153B 153E out of the head and off the shaft Holes in the seal jacket will facilitate the removal 7 Remove the head capscrews 21 and head stud nuts 21C Two jackscrew holes are provided in the rim of the head to facilitate removal 8 Remove the head 20 or 20A from the casing 12 being careful not to nick or scrape the ...

Page 9: ...ten the head capscrews 21 uniformly making sure the head O ring 72 slides into place without damage 4 Attach one hub 20C and bearing 24 to the mounted head without O rings or mechanical seal components Install and snug up the hub capscrews 21D NOTE This step is intended as an assembly aid and is essential to help guide the rotor and shaft into place without damaging the mechanical seal The remaini...

Page 10: ...this time including the mechanical seal and O rings see Step 8 for mechanical seal instructions Lightly grease the shaft and the head chamfers before installing the assembly to enable the O rings to slide into place without damage Reinstall the bearing spacer 24D 12 LOCKNUT INSTALLATION The bearing locknuts 24A and lockwashers 24B MUST be installed and adjusted properly Overtightening locknuts can...

Page 11: ...t protector 185 into the bearing cover 27 on the non driven end of the pump 16 RELIEF VALVE ASSEMBLY if equipped a Insert the valve 9 into the relief valve body 6 with the fluted end inward b Install the relief valve spring 8 spring guide 7 and guide rod 45 against the valve c Attach a new relief valve gasket 10 and the valve cover 4 on the cylinder d Screw the relief valve adjusting screw 2 into ...

Page 12: ... the appropriate procedures and warnings as presented in this manual SCHEDULED MAINTENANCE STRAINERS Strainers must be cleaned regularly to avoid pump starvation Schedule will depend upon the application and conditions LUBRICATION NOTICE To avoid possible entanglement in moving parts do not lubricate gear reducer or any other parts while the pump is running Sleeve bearings bushings are lubricated ...

Page 13: ...e the head 20 or 20A from the casing 12 being careful not to nick or scrape the shaft 7 The disc 71 will come off with the head assembly and is attached with four countersunk allen head machine screws 71A and lockwashers 71B 8 From the open side of the pump grasp the rotor in the 3 and 9 o clock positions and gently pull the rotor and shaft 13 out of the head assembly remaining on the casing CAUTI...

Page 14: ...o nuts 21C on the head studs f Install and tighten the head capscrews 21 uniformly making sure the head O ring 72 slides into place without damage 4 SLEEVE BEARINGS Bushings If the sleeve bearing 24 has been removed from the hub 20C a new bearing must be installed prior to attaching the hub assembly to the head a To aid installation heat the hub in an oven at 200 F 93 C before installing the beari...

Page 15: ...n after 20 30 minutes of running the pump and readjust if necessary NOTE Some leakage is desirable to lubricate the packing but in some cases is unacceptable depending on the application 10 BLACKMER TRIPLE LIP SEAL if equipped On pumps equipped with a Blackmer triple lip seal refer to the separate literature accompanying the triple lip seal for installation instructions 11 COMMERCIAL MECHANICAL SE...

Page 16: ...he discs with a clean cloth and alcohol to remove any dirt or foreign particles MLX Models Improper locknut adjustment Locknuts must be adjusted properly to center the rotor and shaft between the heads Refer to Locknut Installation on Page 10 MLN Models Excessively tight packing Refer to Packing Adjustment on Page 15 MLX MLN Models Contaminated mechanical seal faces Any trace of grease or dirt on ...

Page 17: ...r specific application Continual or long term bypassing of liquid through relief valve Check for restriction in the discharge line or an improper relief valve adjustment See Relief Valve on Page 6 OTHER POSSIBLE CAUSES OF NOISE AND VIBRATION Excessively worn vanes liner or discs Bearing Worn or Damaged Loose or improperly installed piping Misalignment of pump and driver Pump base not properly moun...

Page 18: ...r pressure spikes Pump driver driveline drive shaft misalignment Excessively worn vanes or vane slots Settled or solidified material in the pump at start up Overtightened V belts if used SEAL LEAKAGE Probable Cause O rings not compatible with the liquids pumped O rings nicked cut or twisted Shaft at seal area damaged worn or dirty Ball bearings overgreased Pump sleeve bearings worn excessively Exc...

Page 19: ...106 A00 Page 19 20 NOTES ...

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