JA-5_Appx_4_Tab_10 _Oil_System.pdf

TETRAD Services Inc. 960 diamond Ave Red Buff CA. 96080

LUBRICATION SYSTEM

The two AC lube oil pumps were removed and sent out for inspection by the Hydraulic Center in Fairbanks. The steam driven lube oil pump was removed, disassembled, cleaned and inspected. The bearing thrust and carbon measurements were taken and recorded on form St1-1106 and can be found latter in this tab. The thrust was found to be excessive and will need to be repaired.

The lower bearing journal was found to have a 0.004” tapper and will need to be repaired. The carbons were removed and shipped out to have new manufactured.

The steam driven lube oil pump was sent to Tetrad’s shop for repairs. The upper bearing thrust bearing combination was manufactured along with a new thrust collar. The shaft was skim cut on the lower bearing journal to remove the 0.004” tapper. A new lower bearing was manufactured with the proper clearance. The pump was assembled with new carbon backing and bearings. The pump was installed using new gaskets and returned to service.

The bearing sumps were found to be in fair condition with only minor debris in the bottoms.

The # 1 bearing oil seal was found to have gaps at the split line ranging from closed to 0.010”. The #2 oil seal was found to have gaps at the split line ranging from closed to 0.026”. The #3 oil seal split line was found to have major gaps in areas that range from closed to 0.025”. The #4 bearing housing was found to be leaking. The in board seal was found to have shims on the split lines. This is suspect for the oil leak. The #4 out board seal was found to be in satisfactory condition. The generator end exciter oil seal was found to have gaps up to 0.012” with the exciter end seal in satisfactory condition. The exciter outboard bearing oil seal was found to be in satisfactory condition. All seals with needed repairs were sent to Tetrad’s shop for repairs. All repairs were made and the seals installed with proper clearances.

The lube oil tank was drained by plant personnel. After the tank was drained it was opened, visually inspected and cleaned. During the visual inspection a moderate amount of paint chips and debris were found on the bottom. The lube oil tank was cleaned using rags to wipe all oil and debris out of the tank.

TETRAD Services Inc. Oil Pump, Auxiliary Turbine Driven

Date(m/d/y) 4/15/2011 Turbine Serial No. Prepared by Chris Coy

AS FOUND

INSPECTIONS & CHECKS CODE

Mechanical Condition V-X X Work Carried Out Internal Clearances V-X N Not Done Bearing Condition V-X NA Not Applicable

C See Comments V Visual Inspection

MP Mag. Particle UT Ultrasonic PT Penetrant

Nozzle Clearance

N NA

Packing Clearance Packing 1.761" Shaft 1.750" Clearance 11 Mils

Comments:

Bearing, Upper B i 1 750"

The lower bearing journal was found to have a 0.004 tapper that should be repaired and a newBearing 1.750"

Shaft Dia. 1.745" Clearance 5 Mils

Thrust Bearing, Lower Clearance 29 Mils Bearing 1.252" Shaft Dia. 1.244" Wear Ring, Upper Clearance 8 Mils Bearing 2.269"

Shaft Dia. 2.250" Wear Ring, Lower Clearance 19 Mils Bearing 2.269" Shaft Dia. 2.250" Clearance 19 Mils

ST1-1106 Page should be repaired and a new bearing manufactured.

ST1-1106.XLS

Oil Deflector Clearances

Turbine Date S/N Prepared by Chris Coy

AS FOUND

INSPECTIONS & CHECKS CODE

Teeth Inspected X Work Carried Out Journals Inspected N Not Done NA Not Applicable C See Comments V Visual Inspection MP Mag. Particle UT Ultrasonic

PT Penetrant

Location Oil Deflector Journal Clearance Condition Number A-Dia B-Dia C-Dia Dia Average Min. Max. Comment

1 6.032 6.027 6.044 6.000 0.034 0.027 0.044 2 8.018 8.011 8.043 7.999 0.025 0.012 0.044 3 8.512 8.524 8.508 8.497 0.018 0.011 0.027

4IB 8.023 8.013 8.006 8.000 0.014 0.006 0.023

4OB 7.898 7.878 7.880 7.875 0.010 0.003 0.023

5GE 2.515 2.517 2.527 2.499 0.021 0.016 0.028

5EE 2.531 2.531 2.526 2.499 0.030 0.027 0.032

6 2.518 2.531 2.516 2.499 0.023 0.017 0.032

Comments:

ST1-709 Page

TETRAD

Services Inc.

4/25/2011 17414

C

C

B

BA

A

ST1-709.xls

Oil Deflector Clearances

Turbine Date S/N Prepared by Travis Tucker

FINAL

INSPECTIONS & CHECKS CODE

Teeth Inspected X X Work Carried Out Journals Inspected X N Not Done NA Not Applicable C See Comments V Visual Inspection MP Mag. Particle UT Ultrasonic

PT Penetrant

Location Oil Deflector Journal Clearance Condition Number A-Dia B-Dia C-Dia Dia Average Min. Max. Comment

1 6.017 6.017 6.015 6.000 0.016 0.015 0.017 2 8.012 8.011 8.010 7.999 0.012 0.011 0.013 3 8.522 8.523 8.517 8.497 0.024 0.020 0.026

4GE 8.013 8.015 8.013 7.997 0.017 0.016 0.018

4EE 7.880 7.888 7.882 7.875 0.008 0.005 0.013

Comments:

ST1-709 Page

TETRAD

Services Inc.

6/11/2011 17414

C

C

B

BA

A

ST1-709.xls

TETRAD Oil Deflector Services Inc. Alignment Date Turbine Serial No. Prepared by f ( ) C

Rotor

Oil Deflector

Left Right

Deflector Position (Mils) Clearance Ideal Position Location 1 2 3 4 5 6 Median Min. Max Top Bottom Sides

Comments:

ST1-710 Page

ST1-710.xls