General Pump Overhaul Specifications
General Pump Overhaul Specifications
(OP)
I have an assignment from the power plant manager to put together a general pump overhaul specification which will be used in conjuction with a generated PO to have the plant's spare pumps overhauled at the vendor's shop. I is planned to reference this overhaul specification as pumps are sent out for routine overhauls, as such I would like to look at various examples to formulate this specification. We have vertical mixed flow and horizontal centrifugal pumps of all types Any help would be highly appreciated. THANKS!!





RE: General Pump Overhaul Specifications
RE: General Pump Overhaul Specifications
"Please dismantle, inspect and report on all components together with suggestions for refurbishment / replacement to as new tolerances."
It should be your decision what to repair / replace / accept as servicable in conjunction with your own inspection of the dismantled unit, review of the report and discussion with the pump vendor, if it is not the vendor or an experienced repair shop it will be entirely your decision.
Remember, it's your pump, it's your money and you know that the application is and what your own company policies are regarding refurbishment and what is acceptable.
Naresuan University
Phitsanulok
Thailand
RE: General Pump Overhaul Specifications
Item Specification Renew/Correct
Coupling Hub to Shaft
up to 2" Shaft 0.000" to 0.0005" T >0.0015" L
>2" and Larger Shaft 0.000" to 0.0010" T >0.002" L
Impeller to Shaft (Overhung) 0.001" to 0.002" L >0.003" L
Center Hung Pumps - Refer to OEM Manual or Seek Engineering Support
Bearing to Housing ISO H6 >Table +0.0005", <Table
Bearing to Shaft ISO k5 <Table -0.0005", >Table
Wear Rings
Clearance As per Table As per Table
Fit (Maximum 0.004" T) 0.0005" / inch dia T 0.0005" / inch dia T
Out of Round --- >0.005"
RE: General Pump Overhaul Specifications
Geoffrey D Stone FIMechE C.Eng;FIEust CP Eng
www.waterhammer.bigblog.com.au