MUDPUPPY 250 User manual

Mud Puppy 250 Installation, Operation & Maintenance Manual
www.mudpuppyinc.com | [e-mail] | 530-662-5055
1
Mud Puppy 250 Pump
Installation and Operation Manual

Mud Puppy 250 Installation, Operation & Maintenance Manual
www.mudpuppyinc.com | [email protected] | 530-662-5055
2
TABLE OF CONTENTS
FOREWORD 5
GENERAL INSTRUCTIONS 5
BEFORE SERVICING PUMPS 6
INSTALLATION 6
INTERCHANGEABILITY 6
PUMP ASSEMBLY AND MOUNTING 6
LOCATION 7
FOUNDATION 7
COUPLING ALIGNMENT 7
PIPING 9
PUMP SUCTION 9
PUMP DISCHARGE 10
PREPARATION FOR OPERATION 11
INITIAL LUBRICATION 11
MECHANICAL SEALS 11
PRIMING THE PUMP 12
PACKED PUMPS 13
MECHANICAL SEAL PUMPS 14
OPERATION 15
MAXIMUM OPERATING CONDITIONS 15
PUMP RECORDS 15
LUBRICATION of BEARINGS 15
LUBRICATION of INBOARD LIP SEALS 16
PACKING 16
PACKING APPEARANCE 17
CORRECT INSTALLATION OF PACKING 17
GREASE 18
WATER 18
Re-PACKING THE PUMP (Rope Packing Seal Option) 19
PUMP INSPECTION 21
IMPELLER 21
SHAFT 21
SHAFT SLEEVE 21
MECHANICAL SEAL 21
PACKING BOX 21
BEARINGS 21
SEALS 22
GENERAL 22
PUMP ASSEMBLY 22
SHAFT and BEARING SUBASSEMBLY 22
REPLACING THE MECHANICAL SEAL 22
EXCESSIVE PACKING LEAKAGE and RAPID PACKING WEAR 26
GENERAL 26
PACKING APPEARANCE 26
WATER FLUSH SYSTEM ACCEPTABLE BY OIL COMPANIES 26
GENERAL 26
CONTROLLING WATER PRESSURE TO THE PACKING 26
CONTROLLING WHEN TO USE WATER ON PACKING 26
BEARING FAILURES and HOW TO IMPROVE BEARING LIFE 27
GENERAL 27
MISALIGNMENT BETWEEN PUMP and DRIVER 27
DETECTION OF BEARING FAILURE WHEN PUMP IS RUNNNING 27
IDENTIFICATION OF BEARING FAILURE 28

Mud Puppy 250 Installation, Operation & Maintenance Manual
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ABNORMALLY HIGH TEMPERATURES 28
GREASE APPEARANCE 28
NOISE 28
BEARING DISCOLORATION 28
RETAINER FAILURE 28
DIRTY LUBRICATION 29
TOO MUCH LUBRICANT 29
WRONG KIND OF LUBRICANT 29
MISCELLANEOUS INFORMATION 29
OPERATING LIMITS OF RIG CENTRIFUGAL PUMPS 29
SUCTION LINE VELOCITY 29
NET POSITIVE SUCTION HEAD (NPSH) 29
CAPACITY REQUIREMENTS OF EQUIPMENT IN RIG APPLICATIONS 30
LONG TERM PUMP and MOTOR STORAGE 30
INSTALLATION OF REPLACEMENT PARTS 31
INFORMATION REQUIRED to ORDERPARTS: 32
RECOMMENDED USAGE and REPAIR INFORMATION to COLLECT: 32
TROUBLESHOOTING 32
EXCESSIVE WATER LEAKING and RAPID PACKING FAILURE: 32
PACKING BURNED 33
LONG TERM PUMP AND MOTOR STORAGE 33
CUSTOMER SERVICE 33
Mud Puppy 250 Mud Pump and Wet End Kit Order Sheet 34
250 Pump Motor Mount Shaft Kit Long Body 35
250 PUMP MOTOR MOUNT SHAFT KIT SHORT BODY 36
250 PUMP WET END KIT 4X3X13 DUCTile IRON MECHANICAL SEAL 37
250 PUMP WET END KIT 4X3X13 DUCTILE IRON PACKED SEAL 38
250 PUMP WET END KIT 4X3X13 CHROME MECHANICAL SEAL 39
250 PUMP WET END KIT 4X3X13 CHROME PACKED SEAL 40
250 PUMP WET END KIT 6X5X11 DUCTILE IRON MECHANICAL SEAL 41
250 PUMP WET END KIT 6X5X14 DUCTILE IRON MECHANICAL SEAL 42
250 PUMP WET END KIT 6X5X11 DUCTILE IRON PACKED SEAL 43
250 PUMP WET END KIT 6X5X14 DUCTILE IRON PACKED SEAL 44
250 PUMP WET END KIT 6X5X11 CHROME MECHANICAL SEAL 45
250 PUMP WET END KIT 6X5X14 CHROME MECHANICAL SEAL 46
250 PUMP WET END KIT 6X5X11 CHROME PACKED SEAL 47
250 PUMP WET END KIT 6X5X14 CHROME PACKED SEAL 48
PIPING RECOMMENDATIONS 49
PIPING RECOMMENDATIONS (CONTINUED) 50
PIPING RECOMMENDATIONS (CONTINUED) 51
250 PUMP DIMENSIONS LONG BODy 52
250 PUMP DIMENSIONS SHORT BODY 53
250 PUMP Short Body Pump Assembly with Rope Packing –Base Selection 54
250 PUMP Short Body Pump Assembly with Mechanical Seal – Base Selection 55
250 PUMP Long Body Pump Assembly with Rope Packing –Base Selection 56
250 PUMP Long Body Pump Assembly with Mechanical Seal – Base Selection 57
250 PUMP HOUSING, IMPELLER, STUFFING BOX AND FLANGE GASKET
SELECTION 58
250 PUMP 3X2X13 PUMP CURVE 970 RPM 59
250 PUMP 3X2X13 PUMP CURVE 1150 RPM 60
250 PUMP 3X2X13 PUMP CURVE 1450 RPM 61
250 PUMP 3X2X13 PUMP CURVE 1750 RPM 62
250 PUMP 3X2X13 PUMP CURVE 2900 RPM 63
250 PUMP 3X2X13 PUMP CURVE 3500 RPM 64

Mud Puppy 250 Installation, Operation & Maintenance Manual
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250 PUMP 3X2X13 PUMP CURVE 700-2500 RPM 65
250 PUMP 4X3X13 PUMPCURVE 970 RPM 66
250 PUMP 4X3X13 PUMP CURVE 1150 RPM 67
250 PUMP 4X3X13PUMP CURVE 1450 RPM 68
250 PUMP 4X3X13PUMP CURVE 1750 RPM 69
250 PUMP 4X3X13 PUMPCURVE 2900 RPM 70
250 PUMP 4X3X13 PUMPCURVE 3500 RPM 71
250 PUMP 4X3X13 PUMP CURVE 1000-2400 RPM 72
250 PUMP 6X5X11 PUMP CURVE 970 RPM 73
250 PUMP 6X5X11 PUMP CURVE 1450 RPM 74
250 PUMP 6X5X11 PUMP CURVE 1750 RPM 75
250 PUMP 6X5X11 PUMP CURVE 800-1800 RPM 76
250 PUMP 6X5X14 PUMP CURVE 970 RPM 77
250 PUMP 6X5X14 PUMP CURVE 1150 RPM 78
250 PUMP 6X5X14 PUMP CURVE 1450 RPM 79
250 PUMP 6X5X14 PUMP CURVE 1750 RPM 80
250 PUMP 6X5X14 PUMP CURVE 800-1800 RPM 81
Back Cover 82

Mud Puppy 250 Installation, Operation & Maintenance Manual
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5
FOREWORD
This manual contains instructions for the installation, operation, and
maintenance of the MUD PUPPY 250 pump. As pump service conditions and
specifications vary considerably in pump installation, this manual cannot
cover every situation. But, it is intended that the information included will
serve as a guide. Should questions arise, or start-up problems occur, it is
suggested that you contact the Mud Puppy Corp. distributor or Sales
Representative in your area.
The MUD PUPPY 250 pump generation is an improved version of older 2½
inch shaft pumps. The MUD PUPPY 250 pump is designed to give longer
service life through a wear pad replacement casing, superior bearings,
stainless shaft sleeve, labyrinth bearing cap seals, semi open impellers and
stainless casing nuts.
There are many principles of proper pump installation and applications as
well as special considerations for the MUD PUPPY 250 design that, if
followed, will further enhance its performance.
This document will deal with both general and specific recommendations for
improved Mud Puppy 250 performance in both oilfield and also industrial
applications.
GENERAL INSTRUCTIONS
1. Operate the pump only in the performance range for which it was
designed.
2. The pump driver must drive the pump CLOCKWISE when viewed
from the coupling end. Reversing the rotation will damage the pump.
3. Do not operate the pump with the suction or discharge valves
closed.
4. Adjust the packing so that a small amount of leakage remains for
lubrication and cooling (not applicable for pumps equipped with
mechanical seal).
5. When operating in drilling mud, prevent packing drip page from
clogging the drip area and hardening around the slinger and front
seal. See Section E for mechanical seal installation.
CAUTION!
EXERCISE SAFETY IN ALL PERFORMANCES: DO NOT IGNORE ANY
WARNINGS; USE ONLY APPROVED METHODS, MATERIALS AND TOOLS.
DO NOT PERMIT ANY FUNCTION OF QUESTIONABLE SAFETY; ACCIDENTS
ARE CAUSED BY UNSAFE ACTS AND UNSAFE CONDITIONS.

Mud Puppy 250 Installation, Operation & Maintenance Manual
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BEFORE SERVICING PUMPS
1. SHUT DOWN OR DISENGAGE THE PUMP POWER SOURCE.
2. SHUT DOWN ALL PUMP ACCESSORY EQUIPMENT.
3. RELIEVE OR "BLEED OFF" ALL PRESSURE
FROM THE LINES PRIOR TO REMOVING
PIPING.
INSTALLATION
INTERCHANGEABILITY
The MUD PUPPY 250 horizontal centrifugal pumps outside envelope
dimensions are the same as older 2½ inch pumps of the same nominal size
so the models can be interchanged without changing existing piping,
couplings, or bases.
PUMP ASSEMBLY AND MOUNTING
To install the Mud Puppy 250 pump, place the pump on the machine lining
up the pump with the mounting holes. Mount using (4) 5/8” X 2 ¾” bolts, (8)
5/8” flat washers (4) 5/8” lock washers and (4) 5/8” nuts.
250 Pump Short Body Pedestal 250 Pump Long Body Pedestal
WARNING!
FAILURE TO OBSERVE THE WARNINGS AND NOTES OF CAUTION IN
THIS PUBLICATION CAN RESULT IN PROPERTY DAMAGE, SERIOUS
BODILY INJURY, OR DEATH.
ATTENTION!
THESE TERMS ARE USED TO DRAW ATTENTION TO ACTION THAT WILL
CAUSE DAMAGE TO THE PUMP, COMPONENTS OR ATTACHMENTS.
WARNING!
FAILURE TO SHUT DOWN POWER AND RELIEVE PRESSURE FROM THE
PUMP BEFORE SERVICING CAN RESULT IN SERIOUS PERSONAL
INJURY AND PROPERTY DAMAGE.

Mud Puppy 250 Installation, Operation & Maintenance Manual
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LOCATION
The pump should be located near the liquid source so that the suction line
may be short and direct. The pump should be located below the level of the
liquid to eliminate the necessity of priming.
FOUNDATION
The foundation should be sufficiently rigid and substantial to absorb any
vibration and support the base plate at all points. A concrete foundation,
poured on a solid footing of adequate thickness to support the pumping
unit, provides the most satisfactory foundation. The base plate should be
installed in a level position.
COUPLING ALIGNMENT
Good service life of the pump and driver depends upon good alignment
through the flexible coupling. If the electric motor was mounted at the factory,
the pump and motor were in alignment when shipped. The alignment
between the pump and driver should be inspected after installation to ensure
that transportation or other handling has not caused misalignment of the unit.
To check the alignment using a straight edge, lay the straight edge in line
with the shaft on the OD’s of the coupling halves. There should be no gaps
under the straight edge. Check two locations, 90 degrees apart. Angular
misalignment can be checked by measuring the gap between coupling half
faces. There should be no more than a 1/64th of an inch in the gap between
coupling halves.
NOTE:
A DETAILED DESCRIPTION OF PROPER PROCEDURES FOR GROUTING
BASE PLATES MAY BE FOUND IN THE HYDRAULIC INSTITUTE
STANDARDS, 13TH EDITION, PAGES 116 AND 117.
CAUTION!
MISALIGNMENT BETWEEN THE MOTOR AND 250 PUMP COULD CAUSE
FAILURE OF THE COUPLING, PUMP, MOTOR, BEARING OR EITHER
SHAFT. ALIGNMENT MUST NOT BE ATTEMPTED UNTIL THE BASE IS IN
POSITION AND THE MOUNTING AND FLANGE BOLTS HAVE BEEN
TIGHTENED.

Mud Puppy 250 Installation, Operation & Maintenance Manual
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The recommended procedure for coupling alignment is with the use of a dial
indicator, as illustrated in Figures 1 and 2. The dial indicator is attached to
one coupling half with the indicator button resting on the 0.0. of the other
coupling half to measure offset misalignment. To measure angular
misalignment, the indicator is positioned so that the buttons rest on the face,
near the 0.0., of the other coupling half. Rotate the shaft and dial indicator
one revolution while the other shaft remains stationary and note the T.I.R.
unless otherwise specified by the coupling manufacturer, offset misalignment
should be limited to 0.005 inches T.I.R. Adjust the alignment by loosening the
pump or driver mounting bolts and retighten or shim as required.
Figure 1 Figure 2
Measuring Offset Misalignment Measuring Angular Misalignment
Using A Dial Gauge Using A Dial Gauge
In areas where a dial indicator arrangement is not available, an adequate
job of alignment can be done with a straightedge. This method is especially
useful if the coupling used contains a rubber drive element.
Figure 1A Figure 2A
Measuring Offset Misalignment Measuring Angular Misalignment
Using a Straightedge Using a Straightedge
To check offset misalignment, lay the straightedge in line with the shafts on
the O.O.'s of the coupling halves. There should be no gaps under the
straightedge. Check two locations 90 degrees apart. Angular misalignment
can be checked by measuring the gap between coupling half faces. There
should be no more than a 1/64 inch gap under the straightedge or a 1/64 inch
variation in the gap between the coupling halves. See Figures 1A and 2A.

Mud Puppy 250 Installation, Operation & Maintenance Manual
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PIPING
Piping must not be connected to the pump until the grout has hardened and
the foundation and pump hold down bolts have been tightened.
Connect the inlet hose from the tank to the front of the 250 pump. Connect
the hose going to the Desander Manifold from the top of the 250 pump. There
will also be a hose running from the Mix Hopper.
OUTLET FROM DESANDER MANIFOLD
Inlet from Mud Tank
Piping should be anchored independently of the pump and as near to it as
possible. Pipe companion flanges should line up naturally with pump flanges.
PUMP SUCTION
Properly selected and installed suction piping is extremely important to
eliminate vibration and cavitation in the pump. Vibration can cause packing
problems, mechanical seal damage, or undue bearing loads.
The suction line should be equal to or larger than the pump suction.
NOTE:
FURTHER REFERENCE ON COUPLING ALIGNMENT CAN BE FOUND IN
HYDRAULIC INSTITUTE STANDARDS, 13TH EDITION, PAGES 177 & 120.
CAUTION!
DO NOT DRAW THE PIPE TO THE PUMP WITH FLANGE BOLTS.

Mud Puppy 250 Installation, Operation & Maintenance Manual
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A positive shut-off valve of a type to cause minimal turbulence should be
installed in the suction line to permit the closing of the line for removal of the
pump for inspection and maintenance.
The suction line should be designed to eliminate any air pockets. The piping
should gradually slope downwards to the supply source to eliminate air
pockets.
The suction line should have a straight section into the pump of a length
equivalent to at least two times its diameter; i.e. a 4-inch suction line should
have a minimum 8-inch straight run.
For temporary hook-up when flexible hose is used, a non-collapsing hose is
essential since the suction line pressure is often below atmospheric pressure.
A collapsed suction line will result in below average or complete loss of flow.
PUMP DISCHARGE
A positive shut-off valve should be located in the discharge piping to permit
the closing of the line for removal of the pump for inspection and
maintenance. All piping should be independently supported and accurately
aligned.
CAUTION!
THE CAPACITY OF A CENTRIFUGAL PUMP SHOULD NEVER BE
ADJUSTED BY THROTTLING THE SUCTION LINE.
PUMP DISCHARGE