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®

 Co. All rights reserved.

Cutter Maintenance

To remove star cutter:  Remove guard ring then heat the center 
bolt to 350 °F to loosen Loctite® thread sealant.

Grind the Star Cutter and Disc seen here to a 32 microfinish.  Surfaces 
must be flat to within 0.001” T.I.R.  Gap must be between 0.004” and 

0.008” on these parts.

1. 

All power circuits must be disconnected and locked out before 
any attempts are made at servicing.

  The star cutter and disc can 

be removed and sharpened by grinding the cutting faces.  Both star 
cutter and disc must be removed from the pump.  Removal of these 

parts can be accomplished in the field by removing pump from the 

sump and positioning horizontally to access the intake of the pump.  
If seals or other repairs are required, the pump must be totally 

removed and serviced in a shop by a qualified pump technician or 

authorized service center.

2.  Remove the three countersunk screws on the plastic guard ring 

and remove the ring.

3.  Thoroughly clean the star cutter and disc assembly.  Tilt pump 

back to the vertical position to make certain the end play has 
been removed.  Check and record the clearance between the star 
cutter and disc with a feeler gage.  The correct running clearance 
is between 0.004" and 0.008".

4.  With pump in horizontal position, heat the hex head bolt in the center 

of the star cutter with a propane torch.  The bolt must be heated to 
350 °F to soften the thread lock sealer on the bolt for ease of removal.  
Remove the bolt by turning in a counterclockwise rotation.  It will 
be necessary to use a wood block to prevent the star cutter from 
turning while removing the bolt.  Pull star cutter from the shaft and 
remove the spacer shims located behind the star cutter.

5.  Remove the three cap screws holding the disc and remove disc 

from the pump.

6.  The disc and star cutter can be replaced with new service parts or 

resurfaced by grinding.  Resurfacing is accomplished by surface 

grinding  both  disc  and  star  cutter  to  a  32  micro  finish.    Do  not 
attempt grinding in the field.  Send parts to a qualified machine 

shop for repair. The disc, star cutter and shims are a matched set. 
Keep parts together. Measure disc before and after resurfacing 
with micrometer and record measurements.

  7.  After resurfacing, the disc and star cutter must be flat within 0.001".  

If the disc has been surface ground, it will be necessary to remove 
shims to compensate for the material removed from the disc.  As a 
starting point, remove shims of the same thickness as the amount  
machined from the cutter disc (step 6 above).  Final running clearance 
must be between 0.004” and 0.008”.  Be sure pump is in vertical 
position and all end play has been removed before measuring.

  8.  Clean bottom of pump where disc is located and replace disc and 

retainer screws.  Torque to 63-67 in-lbs.  Replace star cutter with 
the correct shims.  Install washer and torque hex head bolt to 
71-75 in.-lbs. apply Loctite 262 thread-lock sealant or equal to bolt 
threads prior to insertion.  Check running clearance with pump in 
vertical position to remove end play.  Clearance must be between 

0.004" and 0.008" to obtain efficient grinding when pump is put back 

in service.

  9.  Replace plastic guard ring and its three screws.

10.  Check the oil in the motor housing before reinstalling.  Contact the 

factory if the oil has a milky appearance or burnt smell. The level 

should be even with the fill plug when pump is in the upright position.  

Add oil if required. Use insulating oil supplied by the factory.

FIGURE 7.

(Model 7011 components shown)

Содержание 7011

Страница 1: ...s 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 dama...

Страница 2: ...urer subjected to misuse misapplication neglect alteration accidentoractofGod thathasnotbeeninstalled operatedormaintained inaccordancewithManufacturer sinstallationinstructions thathasbeen exposedtoo...

Страница 3: ...ntrol switches will not hang up on the grinder pump or other pit peculiarities and are secured so that the grinder pump will shut off It is recommended to use rigid pipe and fittings and the pit be 24...

Страница 4: ...n on system installation 3 Allelectricalconnectionsincludingpumptocontrolboxandpower supply to control panels must comply with the National Electrical Code and applicable local codes Conduit and panel...

Страница 5: ...f electrical shock Do not remove the power supply cord and strain relief or connect conduit directly to pump Installation and checking of electrical circuits and hardware should be performed by a qual...

Страница 6: ...All installations must comply with all applicable electrical and plumbing codes including but not limited to the National Electrical Code local regional and or state plumbing codes etc Indoor Prepack...

Страница 7: ...perly 5 Dig a hole for the basin The basin should be located in a very low trafficareawithin15 ofthepowerdisconnect Theholeshouldbeat least8 largerindiameterthanthebasininordertoleave4 ofbackfill all...

Страница 8: ...LASS AFD 1 25 2 Z RAIL 2 CAST IRON CHECK VALVE 3 4 GUIDE RAILS 2 SCH 80 BALL VALVE 2 FLEX BOOT FITTING LOCATION VARIES WITH BASIN DEPTH FLOAT TREE ASSEMBLY 2HP GRINDER PUMP 2 PVC SCH 80 PLBG 1 8 302 S...

Страница 9: ...alled in the basin s side wall in a 5 hole drilled with a hole saw at a location lining up with the inlet pipe 6 The bottom of the excavation can now be properly backfilled compacted and leveled Set b...

Страница 10: ...curely installed Floats positioned properly Discharge valves open 3 16 vent hole drilled in pipe between check valve and pump Once the above has been verified proceed with the following checks Pump po...

Страница 11: ...t and remove the spacer shims located behind the star cutter 5 Remove the three cap screws holding the disc and remove disc from the pump 6 The disc and star cutter can be replaced with new service pa...

Страница 12: ...ng insulated protective sole shoes and not standing in water Under flooded conditions contact your local electric company or a qualified licensed electrician for disconnecting electrical service to th...

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