JA-5_Appx_4_Tab_16 _Hot_Well_Pumps.pdf

PDF 77 KB Posted Jul 13, 2015

Attached to: Maintain Turbine-Generator #3
Solicitation number: FA5004-15-R-C008_FTQW_16-1026_Maintain_Turbine
Issued by: Department of the Air Force Pacific Air Forces

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JA-5 Appx 4 Tab 16

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CONDENSATE PUMPS

The condensate pumps were removed disassembled cleaned and inspected. The motors were sent out to a local motor shop for repairs. During the disassembly it was noted that the impellers were worn on the case ring area. It was recommended in a LRR that the impellers be skim cut and the bowls be bored and sleeved to achieve proper clearance. All the bearings and shafts were replaced. New mechanical seals were provided and installed along with spare sets.

The LRR for the repairs of the condensate pumps was approved and the pumps were sent to Tetrads shop for repairs. After skim cutting the impellers they were stacked on the shaft and balanced. The pumps were assembled and installed. The pump lifts were set at 0.125” off the bottom and released for service.

The following is the as found shaft to bearing and impeller to bowl clearances.

PUMP #1

#1 Case Ring: 3.500

#1 Impeller: 3.480

Clearance: 0.020

#2 Case Ring: 3.499

#2 impeller: 3.480

Clearance: 0.019

#3 Case Ring: 3.500

#3 Impeller: 3.480

Clearance: 0.020

#4 Case Ring: 3.498

#4 Impeller: 3.479

#1 Bearing:1.198

#1 Journal: 1.187

Clearance:0.011

#2 Bearing: 1.196

#2 Journal: 1.187

Clearance: 0.009

#3 Bearing: 1.196

#3 Journal: 1.196

#4 Bearing: 1.196

#4 Journal: 1.187

#5 Bearing: 1.197

#5 Journal: 1.187

Clearance: 0.010

#6 Bearing: 1.196

#6 Journal: 1.187

Clearance:0.009

#7 Bearing: 1.007

#7 Journal: 1.000

Clearance: 0.007

#8 Bearing: 1.010

#8 Journal: 1.000

PUMP #2

#1 Case Ring: 3.500

#1 Impeller: 3.479

Clearance: 0.021

#2 Case Ring: 3.500

#2 Impeller: 3.479

#3 Case Ring: 3.498

#3 Impeller: 3.479

#4 Case Ring: 3.499

#4 Impeller: 3.479

Clearance:0.020

#1 Bearing: 1.198

#1 Journal: 1.187

Clearance: 0.011

#2 Bearing: 1.197

#2 Journal:1.187

#3 Bearing: 1.197

#3 Journal:1.187

#4 Bearing: 1.198

#4 Journal:1.187

Clearance:0.011

#5 Bearing: 1.197

#5 Journal: 1.187

#6 Bearing: 1.198

#6 Journal: 1.187

Clearance: 0.011

#7 Bearing: 1.021

#7 Journal: 1.000

#8 Bearing: 1.012

#8 Journal: 1.000

Clearance: 0.012

File details come from the government source that posted it. Updated Nov 14, 2017.