Humphree SU553 Guide

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021564 K17
021564
INSTALLATION DRAWING SU553 / SU563, CHOCKFAST
021564-K17_INST_DRAW_SU553_SU563_CHOCKFAST_ENG_20220127. ft
K17
®
HUMPHREE
STABILIZING FINS

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021564 K17
NOTES:
WARNING! THE HULL REINFORCMENT MUST BE SOLIDLY ANCHORED TO
THE HULL. FOR CORED HULLS,CORE MUST BE REMOVED
AND A SOLID STRUCTURE MUST BE PRODUCED AS PART OF THE HULL.
APPLY ONLY MARINE ADHESIVE SEALANT
CAUTION: DO NOT APPLY SHOCK FAST OR ANY OTHER COMPOUND TO
THE SURFACE WHERE THE FIN IS ATTACHED TO THE SERVO UNIT.
WARNING! THE POSSIBILITY OF THE VESSEL RUNNING AGROUND MUST
ALSO BE CONSIDERED WHEN DESIGNING
THE HULL STRUCTURE.
ENSURE THE MOUNTING SURFACE OF THE HULL REINFORCEMENT IS
FLAT AND SQUARE (PERPENDICULAR) TO THE HULL BORE.
IT IS CRITICAL THAT THE HULL BORE THRU THE REINFORCEMENT
PENETRATS THE HULL NORMAL TO THE INBOARD MOUNTING SURFACE.
WHEN INSTALLING IN A CURVED AREA OF THE HULL, THE OUTBOARD
HULL SURFACE MUST BE FAIRED UNDER THE FLANGE TO BE
PARALLEL TO THE INSIDE MOUNTING SURFACE.
DO NOT BEND THE OUTER FLANGE TO FIT THE CONTOUR OF THE HULL.
THE CUT SURFACE OF THE HULL BORE AND HOLES MUST BE TREATED
WITH THE YARD DESIRED METHOD TO SEAL THE STRUCTURE
FROM POSSIBLE WATER CONTAMINATION.
THE MOUNTING BOLT THRU-HOLES MUST BE PARALLEL TO THE HULL
BORE AXIS, AND PERPENDICULAR TO THE INBOARD AND
OUTBOARD MOUNTING SURFACES. ANGULAR MISALIGNMENT OF THE
MOUNTING BOLTS MAY RESULT IN BOLT FAILURE, AND
SEAWATER INTRUSION.
THE FINS CAN ROTATE 360° AND MUST BE ABLE TO FREELY ROTATE.
REMOVE ALL APPENDAGES WHICH CAN INTERFERE WITH THE FINS.
IF THE FINS ARE SUBJECTED TO A WATER FLOW AND THE SERVO UNITS
ARE NOT POWERED UP, THE FINS CAN BE ROTATED OUT OF POSITION
AND PROTRUDE OUTSIDE THE HULL SIDE.
REVISION CHANGES
K14 ADDED SU563 AND FINS 1,3 & 1,5m² 20200203 BH
REV DESCRIPTION DATE APPVD
K15 REMOVED 0.45m², CHANGED/REMOVED TEXT 20201216 BH
K16 ADDED 150 A FUSE FOR SU563, UPPDATED TEXT. 20210120 BH
K17 UPDATED FIN BOLT INSTRUCTION 20220127 FA

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021564 K17
0.60m² FIN
FIN
CF 060
SU553
Operational
forces,
SPEED 15 kn
Operational
forces,
SPEED 20 kn
Max Operational
forces,
SPEED >28 kn
Groun ing
force*
Fx (kN) -4,1 -6,4 -6,8 90
Fy (kN) 16,9 27,7 35,4 -
Fz (kN) 12 12 12 -
Mx (kNm) 7,3 12,0 15,3 -
My (kNm) 1,8 2,8 2,9 -
Mz (kNm) 2 2 2 -
1.0m² FIN
FIN
CF 100
SU553 SU563
Operational
forces,
SPEED 15 kn
Operational
SPEED 20 kn
Max Operational
SPEED >28 kn
Groun ing
force*
Fx (kN) -6,9 -10,7 -11,3 90
Fy (kN) 28,2 46,2 59,0 -
Fz (kN) 12 12 12 -
Mx (kNm) 12,2 20 25,5 -
My (kNm) 3,0 4,6 4,9 -
Mz (kNm) 2/4** 2/4** 2/4** -
0.8m² FIN
FIN
CF 080
SU553
Operational
forces,
SPEED 15 kn
Operational
forces,
SPEED 20 kn
Max Operational
SPEED >28 kn
Groun ing
force*
Fx (kN) -5,5 -8,6 -9,1 90
Fy (kN) 22,6 36,9 47,2 -
Fz (kN) 12 12 12 -
Mx (kNm) 9,8 16,0 20,4 -
My (kNm) 2,4 3,7 3,9 -
Mz (kNm) 2 2 2 -
1.3m² FIN
FIN
CF 130
SU563
Operational
forces,
SPEED 15 kn
Operational
forces,
SPEED 20 kn
Max Operational
forces,
SPEED >28kn
Groun ing
force*
Fx (kN) -8,9 -13,9 -14,7 110
Fy (kN) 36,7 60,0 76,7 -
Fz (kN) 12 12 12 -
Mx (kNm) 15,9 26,0 33,2 -
My (kNm) 3,9 6,0 6,4 -
Mz (kNm) 4 4 4 -
1.5m² FIN
FIN
CF 150
SU563
Operational
forces,
SPEED 15 kn
Operational
forces,
SPEED 20 kn
Max Operational
forces,
SPEED >28 kn
Brake off
force*
Fx (kN) -10,3 -16,1 -17,0 110
Fy (kN) 42,3 69,2 88,5 -
Fz (kN) 12 12 12 -
Mx (kNm) 18,3 29,9 38,3 -
My (kNm) 4,4 7,0 7,4 -
Mz (kNm) 4 4 4 -
14
14
14
14
14
WARNING:
DESIGN AND FABRICATION OF HULL REINFORCEMENT FOR A SPECIFIC VESSEL
IS THE RESPONSIBILITY OF THE INSTALLER. INSTALLER CONSULTATION WITH A
NAVAL ARCHITECT TO DETERMINE AN APPROPRIATE STRUCTURE TO SAFELY
DISTRIBUTE SERVO UNIT LOADS IS REQUIRED.
FIN LOADS:
FIN ANGLES ARE SPEED DEPENDANT.
My
Mz
Mx
Fy
Fz
Fx
FWD
FWD
* In case of hitting an object straight ahead, the fin is designed with a 'fail safe'
approach and the break off force is presented as "Grounding force".
** This fin can be installed on both servo unit SU553 or SU563.
16
16
16
16
16

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021564 K17
IMPORTANT WARNING:
THE ILLUSTRATIONS SHOWN ON THIS DRAWING ARE TYPICAL HULL
REINFORCEMENT STRUCTURES AND MATERIALS, AND ARE INTENDED
AS A GENERAL GUIDE ONLY.
EACH VESSEL'S REINFORCEMENT STRUCTURE MUST BE CONSIDERED A
UNIQUE DESIGN DUE TO VARIETY OF FORCES DISTRIBUTED TO THE HULL
RESULTING FROM VARIOUS INDIVIDUAL VESSEL PARAMETER. THESE
PARAMETERS INCLUDE, LONGITUDINAL AND TRANSVERSE LOCATION, THE
MAXIMUM OPERATIONAL SPEED OF THE VESSEL, THE VESSEL
DISPLACEMENT, CENTER OF GRAVITY, TRANSVERSE AND LONGITUDINAL
METACENTER, HULL FORM, PURPOSE AND USAGE, ROLLING AND PITCHING
TENDENCIES AND FORCES, AS WELL AS ADJACENT EQUIPMENT,
STRUCTURES AND UNDERWATER APPENDAGES.
THE POSSIBLITITY OF THE FIN STRIKING AN UNDERWATER OBJECT AND THE
POSSIBILITY OF THE VESSEL RUNNING AGROUND MUST ALSO BE
CONSIDERED WHEN DESIGNING HULL STRUCTURES.
IT IS RECOMENEDED THAT THE SERVO UNIT IS
INSTALLED WITH THE ELECTRIC CONNECTOR FACING AFT.
IT IS POSSIBLE TO INSTALL THE SERVO UNIT IN ANY
ROTATION BUT IN THIS CASE THE FIN ORIENTATION
MUST BE CHANGED ELECTRICALY. THE SERVO UNIT IS
DELIVERED WITH THE FIN ORIENTION ALIGNED WITH THE
ARROW ON THE CONNECTOR COVER.
ELECTRIC
CONNECTOR
PARALLEL TO WATER FLOW IN THE FIN AREA.
AFT (STERN)
FWD (BOW)
15

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021564 K17
DETAIL A
HULL THICKNESS
4
FIN TO OUTER FLANGE CLEARANCE =
FIN TO HULL CLEARANCE = 9
LIFTING EYES
WARNING! USE MINIMUM OF THREE LIFTING
EYES WHEN LIFTING THE SERVO UNIT
86
0
-2
TAKE INTO CONSIDERATION THAT THE FIN CAN BE ROTATED 360°.
DEPENDING ON HOW CLOSE TO THE CHINE THE SERVO IS MOUNTED,
THE FIN CAN ROTATE AND PROTRUDE OUTSIDE THE HULL.
A
FIN & SERVO POSITION CONSIDERATIONS
ROTATION AREA
CARBON FIN (CF 553 060 SHOWN)
SEE FIN INSTALLATION
THE FIN HAS A BACK CUT TO ALLOW CLEARANCE FROM HULL STRUCTURES SUCH AS SPRAYRAILS OR APENDAGES. CHECK FOR CLEARANCE!

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021564 K17
PARTS
ITEM QTY PART NAME PART NO.
1 1 SU553, SU563 -
2 1 OUTER FLANGE 021218
3 1 MOUNTING KIT SU553 FOR GRP HULL 021548
4 1 MOUNTING KIT SU553 FOR ALU/STEEL
HULL
022200
SEE HCS5 CONNECTION DIAGRAM FOR THE
SPECIFIC VESSEL PROJECT
MOUNTING KIT SU553 FOR GRP 021548
ITEM QTY PART NAME PART NO.
5 1 CHOCKFAST FOAM 021418
6 1 CHOCKFAST HOSE 1m 021417
7 1 CABLE SU550 Power & Servo bus 3m 021446
8 12 BOLT M10x120 MF6S A4 021423
9 12 Washer M10 A4 011016
10 12 NUT M10 LM A4 011017
IMPORTANT WARNING
THE ILLUSTRATIONS SHOWN IN THIS INSTALLATION MANUAL ARE
TYPICAL HULL REINFORCEMENT STRUCTURES AND MATERIALS, AND
ARE INTENDED AS A GENERAL GUIDE ONLY.
EACH VESSEL'S REINFORCEMENT STRUCTURE MUST BE CONSIDERED A
UNIQUE DESIGN DUE TO VARIETY OF FORCES DISTRIBUTED TO THE
HULL RESULTING FROM VARIOUS INDIVIDUAL VESSEL PARAMETER.
THESE PARAMETERS INCLUDE, LONGITUDINAL AND TRANSVERSE
LOCATION,
THE MAXIMUM OPERATIONAL SPEED OF THE VESSEL, THE VESSEL
DISPLACEMENT, CENTER OF GRAVITY, TRANSVERSE AND
LONGITUDINAL METACENTER, HULL FORM, PURPOSE AND USAGE,
ROLLING AND PITCHING TENDENCIES AND FORCES, AS WELL AS
ADJACENT EQUIPMENT, STRUCTURES AND UNDERWATER
APPENDAGES.
THE POSSIBLITITY OF THE FIN STRIKING AN UNDERWATER OBJECT
AND THE POSSIBILITY OF THE VESSEL RUNNING AGROUND MUST ALSO
BE CONSIDERED WHEN DESIGNING HULL STRUCTURES.
3
MOUNTING KIT SU553 FOR ALU/STEEL HULL 022200
ITEM QTY PART NAME PART NO.
5 1 CHOCKFAST FOAM 021418
6 1 CHOCKFAST HOSE 1m 021417
7 1 CABLE SU550 Power & Servo bus 3m 021446
11 12 BOLT M10x25 MF6S A4 022199
12 12 BOLT M10x50 MC6S A4 022198
9 12 WASHER M10 A4 011016
4
14
15

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021564 K17
INSTALLATION AND CHOCKFAST
READ, UNDERSTAND AND PREPARE FOR THIS ENTIRE PROCEDURE BEFORE
BEGINNING.
STEP 1. CREATE A TEMPLATE FIN FROM A STIFF PLYWOOD OR CORD
PLASTIC SHEET WITHOUT THE MOUNTING FLANGE. TEST THE FIN ROTATION
IN THE AREA TO MAKE SURE IT DOES NOT HIT ANY OBSTICAL OR CHINE. A
PROFILE OF THE FIN IS PRINTED ON THE FIN BOX.
PREPAIR THE HULL BY MAKING A ø420mm HOLE FOR THE SERVO UNIT AND
BY CREATING A FLAT SURFACE ON THE INSIDE AND OUT SIDE WITH A
DIAMETER OF 510mm FOR THE OUTER FLANGE AND SERVO IN A DESIRED
POSITION. THE THICKNESS OF THE HULL MUST BE ACCORDING TO THE
DIMENSION ON SHEET 5 OF THIS DOCUMENT.
SEE SERVO BOLT AND HOLE MOUNTING DIMENSIONS IN STEP 3.
ALU/STEEL
GRP
11
OPTIONAL ALU/STEEL HULL INSERT FOR SU553
ITEM QTY PART NAME PART NO.
10 1 HULL INSERT ALUMINIUM 022105
11 1 HULL INSERT STEEL 022106
12 1 HULL INSERT RING ALUMINIUM 022227
13 1 HULL INSERT RING STEEL 022230
10
1213
EXTRA INSERT RING OPTIONAL
OPTIONAL
420
O
50
MIN
150
MIN
20
MIN
40
MIN
86
0
-2
86
0
-2
GRP with SANDWICH
20
MIN
86
0
-2
40
MIN
50
MIN 150
MIN
1
CAN BE DESIGNED WITH OR WITHOUT EXTRA INSERT RING
REFER TO NAVAL ARCHITECT TO DESIGN CORRECT STRUCTURE.
420
O

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021564 K17
2
STEP 2. IF IT IS DESIRED TO LOCATE THE FIN IN A POSITION THAT IT
COULD HIT THE CHINE THEN CHOOSE TO MODIFY THE HULL OR THE
FIN.
HULL MODIFICATION
FOR MAX 30 KNOTS:
PRODUCE A POD WITH A LEAD IN CHAMFER
SURFACE MINIMUM 1 METER BEFORE AND AFTER
THE FIN TO ALLOW THE WATER FLOW TO BE
SMOOTH AROUND THE FIN.
ABOVE 30 KNOTS:
A SPECIAL DESIGN IS REQUIRED. CONTACT A NAVAL
ARCHITECT TO GET THE DESIGN.
O
420
SLOPE MAX 1:10
FWD
1000 1000O520
MAX 100
420
O
86
0
-2
40
MIN
400
200
50
MIN
AREA THAT WOULD HAVE BEEN
IN CONFLICT WITHOUT CHANGING
THE HULL OR MODIFYING THE FIN

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021564 K17
SINGEL SKIN AREA DESIGNED
FOR EASY MODIFICATION
BY SHIPYARD
EXAMPLE OF MODIFIED FIN
MODIFICATIONS IN THE FIN BODY SHALL NOT BE PERFORMED.
MODIFICATIONS IN THE FIN BODY MAY CAUSE DELAMINATION
OF THE FIN AND NO WARRANTY APPLIES FOR THE FIN.
FIN BODY
11
FIN MODIFICATION
THE FIN CAN BE FREELY MODIFIED IN THE THIN SOLID STRUCTURE BY
JIGSAW OR GRINDER IN THE UPPER BACK PART OF THE FIN.
THE MODIFICATIONS MUST BE 10 MM ABOVE THE RADIUS. THE AREA IS
MARKED BY BROKEN LINE AND DASHED LINES.
IF THE FIN IS MODIFIED, THE NEW SECTION SHOULD BE SANDED
SMOOTHLY AND A NEW LAYER OF EPOXY SHOULD BE APPLIED TO
AVOID WATER INTRUSION IN TO THE COMPOSITE LAMINATE.
NOTE!
MODIFIYING THE FINS WILL REDUCE THE EFFICIENCY OF ZERO SPEED
MODE. CHOOSE LARGER FIN IF POSSIBLE.
2

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021564 K17
HULL DESIGN FOR SERVO UNIT
STEP 3. FOR GRP HULLS CUT THE 420mm HOLE. ALIGN THE HOLE
PATTERN FOR THE M10 BOLTS PARALLEL TO THE WATER FLOW IN THE
FIN AREA. USING A DRILL GUIDE, DRILL THE 12 x ø12 HOLES
PERPENDICULAR TO SURFACE. ALL THE HOLES MUST BE PREPAIRED
WITH YARD DESIRED SURFACE FINNISHING TO ELIMINATE WATER
INTRUSION.
BEFORE INSTALLING THE SERVO UNIT INTO THE HULL, THOROUGHLY
CLEAN, DEGREASE AND PROTECT THE INSIDE HULL DIAMETER , HOLES
AND THE LOWER END OF THE SERVO UNIT FROM CONTAMINATION.
O
420±2
O
12±0,3
12x
PARALLEL TO WATER FLOW IN THE FIN AREA.
O
468±2
GRP
l1,0
30°
B
B
3

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021564 K17
STEP 4. CHECK THE THICKNESS OF THE HULL THAT IT CORRESPONDS
WITH THE TOLERANCE BELOW. SEE ALSO NOTES ON SHEET 4.
4
DETAIL A
HULL THICKNESS
86
0
-2
A

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021564 K17
STEP 5. APPLY MARINE SEALANT AROUND THE EDGE OF THE HULL
STRUCTURE CREATING A SEAL FOR THE CHOCK FAST.
SEALANT
SEALANT
ALU/STEEL
GRP
CAN BE DESIGNED WITH OR
WITHOUT EXTRA INSERT RING
REFER TO NAVAL ARCHITECT
TO DESIGN CORRECT STRUCTURE.
5

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021564 K17
SU553, SU563 ASSEMBLY
CHOCKFAST FOAM INCLUDED IN
MOUNTING KIT SU553 FOR GRP 021548
2
1
5
7
10
9
STEP 6. GRP HULL. ALIGN THE SERVO WITH THE CONNECTOR
FACING AFT.
LIFT THE SERVO UNIT WITH MINIMUM THREE LIFTING EYES. DO NOT LIFT
AT AN ANGLE OF MORE THAN 45° OF THE LIFTING EYE BOLT. THE SERVO
ITSELF HAS NO RESTRICTIONS ON HOW LARGE ANGLES IT CAN
WITHSTAND FOR SHORT PERIODS OF TIME.
GENTLY GUIDE THE SERVO UNIT INTO THE HULL STRUCTURE AT THE
PROPER ORENTATION AND POSITION. ALIGN THE HOLES IN THE SERVO
UNIT SU553/SU563 WITH THE HOLES IN THE HULL STRUCTURE. PLACE
FOUR SHORT M10 BOLTS IN FOUR HOLES OF THE SERVO FLANGE TO
KEEP THE SERVO UNIT SU553 FROM MOVING OUT OF CENTERED
POSITION IN THE HOLE. KEEP THE SERVO UNIT SUPPORTED BY THE
LIFTING DIVICE UNTIL THE MAIN M10 BOLTS ARE PREINSTALLED.
SEALANT
B-B
GRP
14
6

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021564 K17
ALU/STEEL
2
11
12
9
SU553/SU563 ASSEMBLY1
CHOCKFAST FOAM INCLUDED IN
MOUNTING KIT SU553 FOR ALU/STEEL 022200
5
14
STEP 6. ALUMINIUM OR STEEL HULL. ALIGN THE SERVO WITH THE
CONNECTOR FACING AFT.
LIFT THE SERVO UNIT WITH MINIMUM THREE LIFTING EYES. DO NOT LIFT
AT AN ANGLE OF MORE THAN 45° OF THE LIFTING EYE BOLT. THE SERVO
ITSELF HAS NO RESTRICTIONS ON HOW LARGE ANGLES IT CAN
WITHSTAND FOR SHORT PERIODS OF TIME.
GENTLY GUIDE THE SERVO UNIT INTO THE HULL STRUCTURE AT THE
PROPER ORENTATION AND POSITION. ALIGN THE HOLES IN THE SERVO
UNIT SU553/SU563 WITH THE HOLES IN THE HULL STRUCTURE. PLACE
FOUR SHORT M10 BOLTS IN FOUR HOLES OF THE SERVO FLANGE TO
KEEP THE SERVO UNIT SU553 FROM MOVING OUT OF CENTERED
POSITION IN THE HOLE. KEEP THE SERVO UNIT SUPPORTED BY THE
LIFTING DIVICE UNTIL THE MAIN M10 BOLTS ARE PREINSTALLED.
6

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021564 K17
STEP 7. FROM OUTSIDE THE HULL INSTALL THE CHOCKFAST FOAM
(ITEM 5) IN THE GROOVE BETWEEN THE HULL AND THE SERVO UNIT
SU553/SU563 BY PRESSING IT IN PLACE. CUT THE CHOCKFAST FOAM
TO A PERFERED LENGTH SO THE ENDS MEET TIGHTLY TOGETHER AND
APPLY MARINE SEALANT TO SEAL THE ENDS.
MAKE SURE NOT TO PUSH IT TO FAR IN TO THE GROOVE. MEASURE
5mm AROUND THE WHOLE EDGE.
5
7
5

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021564 K17
8
DETAIL C
5
MARINE SEALANT
SERVO UNIT SURFACE
MARINE SEALANT
STEP 8. USE MARINE SEALANT TO SEAL THE CHOCKFAST FOAM (ITEM 5)
AROUND THE EDGE OF THE HOLE AND THE SERVO UNIT SU553/SU563.
CHOCKFAST AREA
5
APPLIES TO GRP AND ALU/STEEL HULLS
NOTE! THERE ARE DIFFERENT BOLTS
DEPENDING ON HULL MATERIAL
C

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021564 K17
STEP 9. CUT THE CHOCKFAST HOSE (ITEM 6) IN THE MIDDLE AND
INSTALL THEM IN THE UPPER AND LOWER LARGE HOLES WHICH GO
THROUGH THE SERVO HOUSING INTO THE CHOCKFAST AREA.
MAKE SURE THE HOSES ARE SECURED.
FILL 1,5 LITERS CHOCKFAST INTO THE LOWEST HOSE AND FILL UPP
THE CHOCKFAST AREA UNTIL CHOCKFAST IS SEEN IN THE UPPER
HOSE.
WAIT UNTIL CHOCKFAST HAS CURED BEFORE REMOVING THE HOSES.
6
CHOCK FAST HOSE INCLUDED IN
MOUNTING KIT SU553 FOR GRP 021548 AND
MOUNTING KIT SU553 FOR ALU/STEEL 022200
FILL CHOCKFAST HERE
5
D
9
1,5 LITERS
CHOCKFAST ORANGE
14

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021564 K17
DETAIL D
STEP 10. AFTER THE CHOCKFAST HAS CURED REMOVE
THE CHOCKFAST FOAM (ITEM 5) AND SEAL BY FILLING THE
AREA WITH MARINE SEALANT.
START BY FILLING A ~7mm THICK SEAM AND LET IT DRY
CHOCKFAST
10
DETAIL D
CHOCKFAST
10.1
7
10.2
FILL THE REST OF THE VOID WHEN THE FIRST SEALANT HAS
DRIED TO MAKE SURE THE SEALANT HAS FULLY BEEN CURED.
MARINE SEALANT
MARINE SEALANT

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021564 K17
STEP 11. APPLY MARINE SEALANT ON THE OUTER FLANGE SURFACE
WHICH FACES THE HULL. INSTALL THE OUTER FLANGE (ITEM 2) AND
WHILE MOUNTING THE M10 BOLTS, COAT THE CYLINDRICAL SURFACE
OF THE BOLT AND UNDER THE HEAD WITH MARINE SEALANT TO SEAL
THE BOLT PASSAGE. INSTALL ALLTHE M10 BOLTS, WASHERS AND
NUTS. RELEASE THE LIFTING DEVICE. FOR ALL THREE INSTALLATIONS
TYPE : TIGHTEN THE M10 BOLTS TO 45 Nm IN A CROSS PATTERN. MAKE
SURE TO APPLY SEALANT TO ALL THROUGH HOLE SURFACES TO
ASURE A WATER TIGHT FIT.
WAIT FOR THE SEALANT TO DRY BEFORE PROCEEDING.
2
DETAIL E
MIN 0,5
IMPORTANT: THE SERVO UNIT SURFACE (SHOWN IN DETAIL) MUST BE
PROTRUDING ABOVE THE OUTER FLANGE (ITEM 2). MINIMUM DISTANCE
IS 0,5mm. IF THE SERVO UNIT SURFACE IS UNDER THE OUTER FLANGE
(ITEM 2) THE FIN WILL NOT BE ABLE TO ROTATE FREELY AND CAUSE
THE FIN TO MALFUNCTION.
MARINE SEALANT
2SERVO UNIT SURFACE
BOLTS, NUTS AND WASHERS ARE INCLUDED IN
MOUNTING KIT SU553 FOR GRP 021548 AND
MOUNTING KIT SU553 FOR ALU/STEEL 022200
E
APPLIES TO GRP AND ALU/STEEL HULLS
NOTE! THERE ARE DIFFERENT BOLTS
DEPENDING ON HULL MATERIAL
11

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021564 K17
STEP 12. POSITION THE FIN SO THAT THE LEADING FRONT
EDGE IS FACING THE BOW.
ALIGN THE FIN WITH THE HOLES IN THE SERVO UNIT RECESS.
MOUNT THE TEN (10) M12 BOLTS (PART NO. 040425) AND
DISTANCE RINGS (PART NO. 023742).
IMPORTANT: TIGHTEN THE CENTER BOLT ON EACH SIDE OF
THE FIN FIRST.
TIGHTEN THE BOLTS TO 120 NM IN A CROSS PATTERN MOVING
OUT TO THE SIDE BOLTS. IMMEDIATELY TIGHTEN ALL BOLTS
AGAIN TO 120 NM.
WAIT 10 MIN AND TIGHTEN THE BOLTS ONE LAST TIME TO 120
NM.
ON EACH SIDE OF THE FIN, INSERT THE SOLID STEEL WIRE
(PART NO. 023806) THROUGH TWO (2) OF THE HOLES IN THE
BOLT HEADS. TWIST THE WIRE ENDS TO SECURE THE WIRE.
USE A PLIER TO REMOVE THE LEFT-OVER WIRE.
FIN
WATER FLOW AT SPEED
BOW (FORWARD)
FIN BOLT KIT M12 021550 PARTS
ITEM QTY PART NAME PART NO.
1 10 BOLT M12x50 M6S A4-80 SPECIAL 040425
2 10 DISTANCE RING 023742
3 2 SOLID STAINLESS STEEL WIRE 023806
DETAIL F
10
F
12
17
17
3
2
1
CENTER BOLT