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INSTRUCTION AND REPAIR MANUAL

MODELS 341A, 342A AND 344A

6

SECTION 

6

ITEM 

340

DATED 

JUNE 1998

SUPERSEDES ITEMS 341, 342, 344
DATED MARCH 1992

© 1992 AURORA PUMP
NO. AURORA, ILLINOIS

NOTE

This repair manual is applicable to pump Models 341A,
342A and 344A. All photos illustrate Model 344A.

ATTENTION: SAFETY WARNINGS:

Read and understand all warnings before installation or servic-
ing pump.

OPERATIONAL LIMITS: *
Maximum Operating Pressure:

175 psi at Temperatures
to 150

O

F  (65.6°C)

Maximum Operating Temperature:

225°F  (107°C)

* See ASTM A126/ANSI B16.1 for pressure/temperature rat- 

ings of flanges.

ELECTRICAL SAFETY:

HIGH TEMPERATURE SAFETY:

HIGH PRESSURE SAFETY:

SERVICE

Your Aurora pump requires no maintenance other than periodic
inspection,  occasional  cleaning  and  lubrication  of  bearings
(MODEL  344A  only).  The  intent  of  inspection  is  to  prevent
breakdown, thus obtaining optimum service life. The liquid end
of the pump is lubricated by the fluid being pumped and there-
fore does not require periodic lubrication. The motor, however
may  require  lubrication,  in  which  case,  the  motor  manufactur-
er’s recommendation should be followed.

LUBRICATION OF IMPELLER SHAFT BEARINGS

The  MODEL  344A  pump  is  available  with  three  options  for
lubricating the shaft bearings. They are:

1. Regreasable (standard)
2. Oil Lubrication
3. Sealed Bearings, Permanent Lubrication

Regreasable  bearings  will  require  periodic  lubrication  and  can
be accomplished by using the zerk or lubrication fittings in the
cartridge cap and power frame. Lubricate the bearings at regu-
lar  intervals  using  a  grease  of  high  quality.  Polyurea  base 

Warning:

Electrical Shock Hazard

All electrical connections are to be made by a qualified elec-
trician in accordance with all codes and ordinances. Failure
to  follow  these  instructions  could  result  in  serious  personal
injury, death or property damage. 

Warning:

Electrical Overload Hazard

Insure  all  motors  have  properly  sized  overload  protection.
Failure  to  follow  these  instructions  could  result  in  serious
personal injury, death or property damage.

Warning:

Sudden Start-Up Hazard

Disconnect  and  lockout  power  source  before  servicing.
Failure  to  follow  these  instructions  could  result  in  serious
personal injury, death or property damage.

Warning:

Hot Surface Hazard

If  pumping  hot  water,  insure  guards  or  proper  insulation  is
installed  to  protect  against  skin  contact  to  hot  piping  or
pump components. Failure to follow these instructions could
result in serious personal injury, death or property damage.

Warning:

Spraying Water Hazard

When servicing pump replace all gaskets and seals. Do not
re-use  old  gaskets  or  seals.  Failure  to  follow  these  instruc-
tions could result in serious personal injury, death or proper-
ty damage.

Warning:

High Pressure Hazard

The  pump  is  rated  at  a  maximum  of  175  psi  at  150°F.  Do
not  exceed  this  pressure.  Install  properly  sized  pressure
relief  valves  in  system.  Failure  to  follow  these  instructions
could  result  in  serious  personal  injury,  death  or  property
damage.

Warning:

Expansion Hazard

Water  expands  when  heated.  Install  properly  sized  thermal
expansion  tanks  and  relief  valves.  Failure  to  follow  these
instructions could result in serious personal injury, death or
property damage.

Summary of Contents for 341A

Page 1: ...ubricate the bearings at regu lar intervals using a grease of high quality Polyurea base Warning Electrical Shock Hazard All electrical connections are to be made by a qualified elec trician in accordance with all codes and ordinances Failure to follow these instructions could result in serious personal injury death or property damage Warning Electrical Overload Hazard Insure all motors have prope...

Page 2: ... oil should be changed about once a year However when the pump is exposed to dirt contamination high temperatures 200 F or above or a wet location the oil may have to be changed every 2 to 3 months Use normal fire caution procedures when using any petroleum cleaner REPAIRS Before starting any work insure the electrical power is locked out the system pressure has been lowered to 0 psi and tempera t...

Page 3: ...oved with a puller New ring s should be used for reassembly since it is likely that during removal this fit will be lost Do not remove wearing rings if not being replaced 9 Impeller wearing rings optional 14 and 15 are pressed on and must be cut off if replacement is necessary If they are turned off in a lathe take care not to cut into the impeller 10 Slide sleeve 25 with rotating parts of mechani...

Page 4: ...s 48 Insert grease seals 51A and position slingers 47 and 47A on the shaft 344A 5 The mechanical seal 27 see Figure 1 cannot be installed as an assembly It is necessary to have the seal seat properly in place in bracket 35 before the balance of parts can be added Thoroughly inspect the seal cavity in seal bracket checking for burrs or nicks which could damage flexible cup of mechanical seal Apply ...

Page 5: ... bracket and secure with screws 5 On Model 342A pumps position gasket 72 and set pump assembly in place Tighten pump to base 73 with capscrews 39 13 Replace all relief cooling flushings or drain lines from the pump including compression connections 1 and 2 and tub ing 3 Replace all grease fittings pipe plugs tube vents and oiler assembly for oil lubricated units Connect discharge piping and suctio...

Page 6: ...FLEXIBLE CUP STATIONARY SEAT WASHER FLEXIBLE BELLOWS RETAINER DRIVE RING SPRING MODELS 341A 342A 344A 6 Figure 1 Mechanical Seal ...

Page 7: ...ar Ring 25 Sleeve 27 Seal 32 Capscrew 33 Screw 34 Nameplate 35 Bracket 39 Capscrew 40 Washer 41 Support 61 Pin 1 Elbow 2 Connector 3 Tubing 4 Plug Pipe 5 Capscrew 6 Casing 7 Wear Ring 8 Gasket 9 Impeller Screw 9A Washer MODEL 342A LIST OF PARTS 9B Gasket 9C Capscrew Seal 10 Gasket 11 Impeller 12 Impeller Key 14 Wear Ring 15 Wear Ring 16 Wear Ring 25 Sleeve 27 Seal 32 Capscrew 33 Screw 34 Nameplate...

Page 8: ...8 8 9 15 6 11 14 9A 41 35 33 34 32 27 25 61 16 5 2 3 39 9B 9C 3 4 1 7 12 10 40 4 MODEL 341A Figure 2 Model 341A Exploded View ...

Page 9: ...9 6 7 72 74 75 73 39 4 1 3 8 27 35 32 5 61 12 15 11 14 10 25 16 33 34 2 3 9B 9A 9C 9 4 MODEL 342A Figure 3 Model 342A Exploded View ...

Page 10: ... 16 8 11 14 9A 9B 9C 7 15 27 25 61 12 10 49 52 50 55 42 54 57 64 2 3 5 35 63 62 39 60 33 46 56 51 47A 46 56 48 47 51A 53 41 40 44 59 58 59 9 6 1 3 4 34 32 4 59 43 Figure 4 Model 344A Exploded View AP Sect 6 Item 340 ...

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