Keyless Propeller Removal & Installation

 
   Keyless Propeller
     

Slacking steps:

1)      CHECK THE GAP BETWEEN THE ROPE GUARD & PROPELLER END THEN REMOVE               THE ROPE GUARD.
2)      POLISH ONLY TIPS AND ROOTS WITH PROPELLER BOSS FOR CRACK TEST.
3)      Put MAIN ENGINE PISTON No.1 ON TOP DEAD CENTER POSITION.
4)      MAESURE WEAR DOWN USING POKER GAUGE.
5)      BRROKE THE PROPELLR CAP CEMENT.
6)      DRAIN THE STERN TUBE OIL.
7)      DISCONNECT THE LINER FROM THE PROPELLER.
8)      MARK THE POSITION OF THE PROPELLER TO THE SHFT RADIAL AND AXIAL.
9)      DISCONNECT THE CAP.
10)   WELD TWO PADEYES 180deg. WITH THE STERN TUBE BOSS.
11)   SECURE THE PROPELLER TO THE STERN TUBE POST.
12)   MARK THE POSITION OF THE NUT TO THE SHAFT.
13)   MEASURE THE DISTANC BETWEEN THE PROPELLER BOSS TO THE SHAFT END                   USING MICROMETER.
14)   SLACK THE PROPELLR NUT WITH GAP 40mm.
15)   PUT GASKET OR WOODEN PICES BETTWEN THE NUT AND PROPELLER HUB.
16)   CONNECT THE HYDRULIC PUMP TO THE PROPELLER BOSS.
17)   MEASURE THE TEMPURTURE OF THE PROPELLER BOSS AND THE SHAFT.
18)   VENT THE AIR FROM THE PROPELLER BOSS, THEN START RISEING THE PRESSURE              UP.
19)   RECORD THE SLACKING PRESSURE AND TEMP.
20)   PROTECT THE SHAFT THREAD AGAINST PULLING OF THE PROPELLER.
21)   PULL THE PROPELLER OUT OF THE SHAFT AND HANGE IT.
22)   BRING THE AFT STERN TUBE SEAL TO W/S.

PROPELLER BOXING UP:

1)      PUT THE AFT STERN TUBE SEAL IN PLACE WITH NEW GASKETAND O-RING
2)      PULL THE PROPELLER BACK AND MAKE SURE THAT THE PROPELLER ON THE SAME         DIRECTION OF THE REMOVAL MARK (ALLOWABLE DIVITION 5mm).
3)      TIGHT THE PROPELLER NUT AGAINST THE PROPELLER.
4)      CONNECT THE HYDRULIC PUMP TO THE PROPELLER AND NUT.
5)      MEASURE THE PROPELLER BOSS TEMP. & SHAFT TMP. THE USE THE PUSH UP                     CHARTS TO ESTIMATE THE PUSH UP DISTANCE. DRY&WET CONDITION
6)      VENT AIR OF THE NUT, PROPELLER HUB.
7)      START RISING UP THE OIL PRESSURE IN THE  HY.NUT ACCORDINALY WITH OIL                   PRESSURE OF THE HUB AND RECORD FOR EACH 1mm TO BE MEASURED BY DAIL               GAUGE.
8)      AFTER COMPLITING THE PUSH UP, RELASE THE PRESSURE FROM THE HUB AND                 KEEP THE NUT FOR 10 MINUTE THEN RELASE AND TIGHT THEN FIT THE LOCK WITH         LASHING.
9)      CONNECT THE LINER.
10)   CLOSE ALL PROPELLER PLUGS AND FIT THE CAP WITH LASHING AND CEMENT.
11)   REMOVE ALL LIFTING TOOLS & CUT ALL PAD EYES.
12)   CARRY OUT ALIGNMENT O THE STERN TUBE SEAL.
13)   INFORM SHIP SATFF TO FILL THE STERN TUBE OIL
14)   CARRY OUT STERN TUBE SEAL LEAK TEST.
15)   TAKE WEAR DOWN @PISTON NO.1 T.D.C
16)   START POLISHING THE PROPELLER.
17)   CARRY OUT DYE CHECK FOR PROPELLER BOSS, TIPS, AND ROOTS.

NOTES:
1)      BRING THE SPARE SEAL  TO THE WORK SHOP THEN INSPECT IT WELL
2)      CHECK THE DISTANCE BETWEEN THE PROPELLER AND RUDDER TO SEE IF THE         PROPELLER CAN PASS OR NEED TO TURN THE RUDDER.
3)      CHECK THE CORRECT POSTION FOR TURNING THE RUDDER EITHER HARD                 PORT OR HARD STBD. OR REQUIRED TO TURN THE RUDDER 90Deg.
4)      CHECK THE SHAPE OF THE SHIP STERN TO HANGE THE CORRECT TOOLS.
5)      CHECK THE LENGTH OF THE PROPELLER BOSS x4 ROUND. TO ESTIMATE THE             LENGHTH OF THE LIFTING WIRE.
6)      CHECK IF THE PROPELLER HAS DISTANCE  RING BECAUSE IT WILL BE A LIMT           OF THE PUSH UP
7)      BE SURE THE PROPELLER O-RING & GASKET FITTED BEFORE PUSHING UP THE         PROPELLER.

Job to be carried out after propeller removal:

1)      Clean the tail shaft  taper
2)      MPI CRACK TEST TO BE CARRIED OUT FOR SHAFT TAPER AND ABOUT 25% TAPER             LENGTH AFT THE TAPER END.
3)      TAKE THE CLEARANCES BETTWEN THE SHAFT AND STERN TUBE BEARING USING           FELLER GAUGE.

PRECAUTION MUST BE TAKEN IN CONSIDERATION:

1)      CLEAN THE PROPELLER HUB WELL USING DESIEL THEN BY HUDRULIC OIL AFTER           THAT MAKE IT DRY, COVER WELL USING WOODEN BLANK.
2)      CLEAN THE SHAFT WELL AFTER MPI TEST AND PROTECT IT WELL.
3)      PROTECT THE LINER FOR THE SEAL HOUSING AND USE THE LIFTING CLAMP TO                 REMOVE THE SEAL CASING FROM THE SHAFT.
4)      PUSH UP PRESSURE NOT EXCCED MORE THAN 10% OF SLACKING PRESSURE.
5)      LINER BOLTS TO BE LOOSE, FREE AND MONUTRING DURING THE PUSH UP.
6)      THE DAIL GAUGE READER MUST BE MORE THAN THE PUSH UP DISTANCE WITH                 LONG NEEDEL.
7)      USE THE SUITABLE OIL GRADE FOR SLACKING & JACKING ACCORDING TO                          TEMPURTE.