Page 1
Radial Winch 20 ST
Installation and Maintenance Manual
MRW-03
Page 2
2
Radial Winch
20 ST
Installation and Maintenance Manual
Index
Introduction 3
Technical characteristics 3
Weights 3
Maximum working load 3
Outline 3
Installation 4
Procedure 1 5
Procedure 2 6
Installation procedure 8
Positioning the self-tailing arm 9
Maintenance 9
Washing 9
Maintenance table 9
Disassembly procedure 9
Exploded view with maintenance products 12
Assembly 13
Harken
®
limited worldwide warranty 14
Ordering spare parts 14
Exploded view 15
Parts List 19
Radial Winch 20 STA 19
Radial Winch 20 STC 20
Radial Winch 20 STCW 21
Radial Winch 20 STBBB 22
Radial Winch 20 STCCC 23
Page 3
3
Radial Winch
20 ST
Installation and Maintenance Manual
Introduction - Technical characteristics - Outline
Introduction
This manual gives technical information on winch installation and maintenance, including
disassembling and reassembling.
This information is DESTINED EXCLUSIVELY for specialised personnel or expert users.
Installation, disassembling and reassembling of the winch by personnel who are not experts may
cause serious damage to users and those in the vicinity of the winch.
Harken® accepts no responsibility for defective installation or reassembly of its winches.
In case of doubt the Harken® Tech Service is at your disposal at techservice@harken.it
This Manual is available only in English. If you do not fully understand the English language, do
not carry out the operations described in this Manual.
Technical characteristics
Power ratio Gear ratio
1st speed
19,20 : 1 2,76 : 1
The theoretical power ratio does not take friction into account.
Weights
ST A version ST C/CW versions ST BBB/CCC versions
Weight (Kg)
2,4 3,4 3,9
Versions: A = drum in anodised aluminium; C = drum in chrome bronze; CW = chrome/white;
BBB = all bronze; CCC = All-Chrome bronze
Maximum working load
WARNING!
The maximum working load (MWL) for the 20 ST Radial Winch is 550 Kg (1213 lb)
Subjecting the winch to loads above the maximum working load can cause the winch to fail or
pull off the deck suddenly and unexpectedly during high loads causing severe injury or death.
Outline
Winch 20 ST
Winch 20 PT
148
Ø73,5
Ø137
61
Line entry height
Page 4
4
Radial Winch
20 ST
Installation and Maintenance Manual
Installation
The winch must be installed on a at area of the deck, reinforced if necessary to bear a load equal
to at least twice the maximum working load of the winch.
It is the installer's responsibility to carry out all structural tests needed to ensure that the deck can
bear the load.
Harken® does not supply the screws needed to install the winch since these may vary depending
on the deck on which it is to be installed.
It is the installer's responsibility to choose the correct screws taking account of the loads they will
have to bear.
Harken® assumes no responsibility for incorrect installation of its winches or for an incorrect choice
of mounting screws.
DANGER!
Incorrect installation of the winch may cause severe injury or death. Consult the yard that built
the boat in the case of doubt over the correct positioning of the winch.
WARNING!
Failure to use the correct number and type of mounting fasteners or failure to ensure the
correct deck strength can result in the winch pulling off the deck suddenly and unexpectedly
during high loads causing severe injury or death.
WARNING!
Verify the entry angle of the sheet. This must be 8° with tolerance of
±2°, to avoid sheet overrides and damaging the winch or making the
winch inoperable leading to loss of control of the boat which can lead to
severe injury or death.
WARNING!
Mount the winch on the deck so that the drive gear is positioned where
the sheet enters the winch drum.
Incorrect position of drive gear can weaken winch leading to failure
which can cause an accident leading to severe injury or death.
NOTICE
For winch STA, STC and STCW versions only
you can nd the icon on the skirt to identify the drive
gear position.
Once you have chosen the correct mounting position for the winch on the deck proceed with
installation.
Installation
drive gear
SHEET
8°
Page 5
5
Radial Winch
20 ST
Installation and Maintenance Manual
The winch can be installed following one of the two procedures below (Procedure1 or Procedure 2):
Procedure 1
To install the winch you must remove the drum and use bolts as described ahead.
Tools needed One medium at-bladed screwdriver
To identify the various parts, refer to the exploded view at the end of this Manual.
Torque to apply when assembling
1. Unscrew the central screw ( 2Nm/18 in-lb)
2. Slide off the assy socket n°20 and the cover
n°19
3. Unscrew the three screws n°18
(
4Nm/35 in-lb)
4. Remove the self-tailing arm n°17 by rotating
and lifting it.
Page 6
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Radial Winch
20 ST
Installation and Maintenance Manual
Procedure 2 (not pertinent for ST BBB/CCC versions)
To install, you must remove the winch skirt and use hexagonal headed bolts.
Tools needed One medium at-bladed screwdriver
To identify the various parts, refer to the exploded view at the end of this Manual.
2. Take off the skirt n°2
1. Remove the skirt n°2 with the help of the
screwdriver placed as shown by the
symbol
5. Lift off the drum n°13
Winch STA, STC and STCW versions:
Install the winch on the deck in the position you have chosen, keeping in mind
the limits described on page 4 and using socket head (SH) bolts.
Winch STBBB and STCCC versions:
Install the winch on the deck in the position you have chosen, keeping in mind
the limits described on page 4 and using socket head (SH) bolts or hexagonal
headed bolts (HH).
Page 7
7
Radial Winch
20 ST
Installation and Maintenance Manual
NOTICE
Make sure the skirt is correctly clipped on to the base of the winch.
Install the winch on the deck in the position you have chosen, keeping in mind the limits described
on page 4 and using hexagonal headed bolts (HH).
(See paragraph on installation)
4. Reposition the skirt n°2 in its housing 5. Press down the skirt to position it correctly
3. Position the 5 M6 hexagonal headed bolts
in their holes
Page 8
8
Radial Winch
20 ST
Installation and Maintenance Manual
B. Remove the winch and drill the ve 6.2 mm diameter holes.
C. Bolt the base of the winch to the deck using ve M6 bolts (not supplied by Harken®) as
described at Procedure 1 or Procedure 2, correctly chosen for the thickness and type of the
boat deck. Consult the yard that built the boat in case of doubt.
WARNING!
To install the winch on the deck, use only bolts in A4 stainless steel (DIN 267 part11).
Bolts made of other materials may not have sufficient strength or may corrode which can result
in winch pulling off deck suddenly and unexpectedly during high loads causing severe injury or
death.
NOTICE
To mount winches on the deck, do not use countersunk bolts.
D. Fill the mounting holes with a suitable marine sealant.
E. Remove the excess adhesive/sealant from the holes and base drainage channels
F. Reassemble the winch following the steps in Procedure 1 or Procedure 2 in the reverse
order, and apply the products indicated in the section on maintenance.
Installation procedure
Carry out Procedure 1 or Procedure 2, then install the winch on the deck in the chosen
position.
A. Position the base of the winch on the deck and mark the position of the holes or use the
drilling cut-out template at the point where you have decided to place the winch.
Below is a reduced scale diagram.
The drilling cut out template is available on the Harken® website, www.harken.com
Ø110
50°
60°
60°
70°
60°
60°
Winch outside Ø137
final pinion
position
Ø6
n°5
Page 9
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Radial Winch
20 ST
Installation and Maintenance Manual
NOTICE
Before closing the winch, make sure the holes and drainage channels in the base of the winch
are not obstructed.
Positioning the self-tailing arm
Position the self-tailing arm so that the line leaving the winch is led into the cockpit.
Maintenance
Washing
Winches must be washed frequently with fresh water, and in any case after each use.
Do not allow teak cleaning products or other cleaners containing caustic solutions to come into
contact with winches and especially anodised, chrome plated or plastic parts.
Do not use solvents, polishes or abrasive pastes on the logos or stickers on the winches. Do not
use polishes or abrasive pastes on anodised, chrome plated or plastics surfaces.
Make sure that the holes and drainage channels in the base of the winch are not obstructed so
that water does not collect.
Maintenance table
Winches must be visually inspected at the beginning and end of every season of sailing or racing.
In addition they must be completely overhauled, cleaned and lubricated at least every 12 months.
After an inspection, replace worn or damaged components. Do not replace or modify any part of
the winch with a part that is not original.
WARNING!
Periodic maintenance must be carried out regularly. Lack of adequate maintenance shortens
the life of the winch, can cause serious injury and also invalidate the winch warranty.
Installation and maintenance of winches must be carried out exclusively by specialized
personnel.
In the case of doubt contact Harken® Tech Service at techservice@harken.it
Disassembly procedure
Tools needed
One medium at-bladed screwdriver
A number ve hex key
Rags
To identify the various parts refer to the exploded view at the end of this Manual.
Torque to be applied in assembly phase
Maintenance
Page 10
10
Radial Winch
20 ST
Installation and Maintenance Manual
Carry out Procedure 1 as shown in the paragraph on winch installation and then do the following:
6. Completely unscrew the three screws n°18
8. Slide out the central shaft n°7
10. Slide off gear n°3
7. Remove the self-tailing arm support n°12
and slide out the bushing
9. Remove the pin n°6
11. Slide off gear n°11
Page 11
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Radial Winch
20 ST
Installation and Maintenance Manual
If it is necessary to replace any jaws of the winch, proceed as follows:
If it is necessary to remove any pawls in the central shaft, proceed as follows:
I. Unscrew the 3 screws n°16
( 4Nm/35 in-lb)
Unscrew the screw n°10 and remove the
washer n°9 (
4Nm/35 in-lb)
II. Remove the jaws n°15
Once the winch is completely disassembled, clean the parts: use a basin of diesel oil to soak
metal components and rinse plastic parts in fresh water. Once you have done this, dry the parts
with cloths that do not leave residue.
Inspect gears, bearings, pins and pawls for any signs of wear or corrosion.
Carefully check the teeth of gears and ring gears to make sure there are no traces of wear.
Replace worn or damaged components.
Carry out maintenance on components using the products listed below.
For more information on which products to use where, refer to the exploded diagram below.
Use a brush to lightly lubricate all gears, gear pins, teeth and all moving parts with grease.
Lightly lubricate the pawls and springs with oil. Do not use grease on the pawls!
Page 12
12
Radial Winch
20 ST
Installation and Maintenance Manual
Exploded view with maintenance products
G
G
A
A
Harken® Grease
G
Harken® Pawl Oil
O
T
Threadlocker
Anti-seize
A
G
G
G
T
O
O
1
2
1. Apply Harken® grease on assy socket screw - 2. Apply Harken® grease on drum gear
Page 13
13
Radial Winch
20 ST
Installation and Maintenance Manual
Assembly
Make sure that the holes and drainage channels in the base of the winch are not obstructed
Assemble the winch in the reverse order of the sequence in the section on disassembly.
To tighten bolts, use the torque indicated in the disassembly procedure.
When positioning the stripper arm,
align the peeler with it.
If the jaws have been disassembled,
insert peeler between the two jaws,
taking care that the letters TOP on the
peeler are facing upwards.
OIL
To assemble the pawls
Correctly position the spring in its housing
as shown at left. Hold the spring closed
and slide the pawl into its housing. Once
in position, check that the pawls can be
easily opened and closed with a nger.
In case of doubt concerning the assembly procedure contact Harken® Tech Service:
techservice@harken.it
Page 14
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Radial Winch
20 ST
Installation and Maintenance Manual
Harken® limited worldwide warranty
Refer to the Harken® Limited Worldwide Warranty in the Harken® Catalogue and on the website
www.harken.com
W XXXXX
XXXXXXXXX
Harken® limited worldwide warranty - Ordering spare parts
Headquarters
Harken®, Inc.
1251 East Wisconsin Avenue
Pewaukee, Wisconsin 53072-3755 USA
Tel: (262) 691.3320
Fax: (262) 691.3008
Email: harken@harken.com
Web: www.harken.com
Manufacturer
Harken® Italy S.p.A.
Via Marco Biagi, 14
22070 Limido Comasco (CO) Italy
Tel: (+39) 031.3523511
Fax: (+39) 031.3520031
Email: info@harken.it
Web: www.harken.com
Tech Service
Email: techservice@harken.it
Customer Service
Tel: (+39) 031.3523511
Email: info@harken.it
Tech Service
Email: technicalservice@harken.com
Customer Service
Tel: (262) 691-3320
Email: customerservice@harken.com
Ordering spare parts
Spare parts can be requested from Harken® as
described in the Harken® Limited Worldwide
Warranty, indicating the part number in the
Parts List and including the serial number of the
winch for which the parts are required.
The serial number of the winch is printed on
a plate on the drum support of the winch.
Page 15
15
Radial Winch
20 ST
Installation and Maintenance Manual
Exploded view
Exploded view
14
13
15
16
12
17
18
19
20
Radial Winch 20 STA, STC, STCW
Page 16
16
Radial Winch
20 ST
Installation and Maintenance Manual
2
1
4
5
11
4
5
7
3
6
10
9
8
4
5
Radial Winch 20 STA, STC, STCW
Page 17
17
Radial Winch
20 ST
Installation and Maintenance Manual
13
12
14
15
11
16
17
18
19
20
Radial Winch 20 STBBB, STCCC
Page 18
18
Radial Winch
20 ST
Installation and Maintenance Manual
1
3
4
10
3
4
6
2
5
9
8
7
3
4
Radial Winch 20 STBBB, STCCC
Page 19
19
Radial Winch
20 ST
Installation and Maintenance Manual
*Available with service kit; see website www.harken.com
**Winch product sticker
Parts lists
Radial Winch 20 STA
A = drum in anodised aluminium
Pos. Q.ty Code Description
1
1
1
1
1
1
1
A94136900
S413740085
S413960085
S413720080
S4137300B2
S4137100A7
Assy Housing Winch 20
Housing W20
Bushing Ø9xØ11x9
Bushing Ø9xØ11x12
Heli-coil M6x9
Bushing Ø55xØ62x34
Washer Ø33.5xØ58x5.5
Bushing Ø28xØ33x25
2
1 A94138600
Assy Skirt Winch 20
Skirt W20
Winch Product Sticker**
3
12A94136700
S418730080
Assy Gear Z18
Gear Z18
Bushing Ø9xØ11x7
4
4 S000080003
Pawl Ø8*
5
4 S000380001
Pawl Spring Ø8*
6
1 S413700004
Pin
7
1 S413630002
Shaft Winch 20
8 Winch Serial Number Sticker
9
1 S268890080
Washer
10
1 M0604003
Screw M6x12 UNI 5933
11
1 S413620041
Gear Z21
12
1 S4129400A0
Stripper arm support
13
1 S413560053
Drum W20
14
1 S281670097
Red line
15
1
1
3
A94136500
S413610080
S385970001
Assy Jaws Winch 20
Lower Jaw W20
Upper Jaw W20
Peeler W20 - 40
SPRING
16
3 M6009103
Screw UNI EN ISO 1207:1996 - M5x35-
A4
17
1 S413570019
Stripper Arm W20
18
3 M6007103
Screw M6x50 UNI6107
19
1 S4135800A5
Cover 1 Speed W20
20
1
1
1
A94136400
S415130085
M0614303
Assy Socket W20-80
Socket Handle W20/80
Washer Ø7.7xØ25x5.8
Screw M8x20 UNI 6109
Parts List
Page 20
20
Radial Winch
20 ST
Installation and Maintenance Manual
Radial Winch 20 STC
C = drum in chrome bronze
*Available with service kit; see website www.harken.com
**Winch product sticker
Pos. Q.ty Code Description
1
1
1
1
1
1
1
A94136900
S413740085
S413960085
S413720080
S4137300B2
S4137100A7
Assy Housing Winch 20
Housing W20
Bushing Ø9xØ11x9
Bushing Ø9xØ11x12
Heli-coil M6x9
Bushing Ø55xØ62x34
Washer Ø33.5xØ58x5.5
Bushing Ø28xØ33x25
2
1 A94138600
Assy Skirt Winch 20
Skirt W20
Winch Product Sticker**
3
12A94136700
S418730080
Assy Gear Z18
Gear Z18
Bushing Ø9xØ11x7
4
4 S000080003
Pawl Ø8*
5
4 S000380001
Pawl Spring Ø8*
6
1 S413700004
Pin
7
1 S413630002
Shaft Winch 20
8 Winch Serial Number Sticker
9
1 S268890080
Washer
10
1 M0604003
Screw M6x12 UNI 5933
11
1 S413620041
Gear Z21
12
1 S4129400A0
Stripper arm support
13
1 S413550043
Drum C W20
14
1 S281670097
Red line
15
1
1
3
A94136500
S413610080
S385970001
Assy Jaws Winch 20
Lower Jaw W20
Upper Jaw W20
Peeler W20 - 40
SPRING
16
3 M6009103
Screw UNI EN ISO 1207:1996 - M5x35-
A4
17
1 S413570019
Stripper Arm W20
18
3 M6007103
Screw M6x50 UNI6107
19
1 S4135800A5
Cover 1 Speed W20
20
1
1
1
A94136400
S415130085
M0614303
Assy Socket W20-80
Socket Handle W20/80
Washer Ø7.7xØ25x5.8
Screw M8x20 UNI 6109
Page 21
21
Radial Winch
20 ST
Installation and Maintenance Manual
Radial Winch 20 STCW
CW = chrome/white
*Available with service kit; see website www.harken.com
**Winch product sticker
Pos. Q.ty Code Description
1
1
1
1
1
1
1
A94136900
S413740085
S413960085
S413720080
S4137300B2
S4137100A7
Assy Housing Winch 20
Housing W20
Bushing Ø9xØ11x9
Bushing Ø9xØ11x12
Heli-coil M6x9
Bushing Ø55xØ62x34
Washer Ø33.5xØ58x5.5
Bushing Ø28xØ33x25
2
1 A94138600W
Assy Skirt Winch 20 RAL9003
Skirt W20 RAL9003
Winch Product Sticker**
3
12A94136700
S418730080
Assy Gear Z18
Gear Z18
Bushing Ø9xØ11x7
4
4 S000080003
Pawl Ø8*
5
4 S000380001
Pawl Spring Ø8*
6
1 S413700004
Pin
7
1 S413630002
Shaft Winch 20
8 Winch Serial Number Sticker
9
1 S268890080
Washer
10
1 M0604003
Screw M6x12 UNI 5933
11
1 S413620041
Gear Z21
12
1 S4129400A0
Stripper arm support
13
1 S413550043
Drum C W20
14
1 S281670097
Red line
15
1
1
3
A94136500W
S413610080W
S385970001
Assy Jaws Winch 20 RAL9003
Lower Jaw W20 RAL9003
Upper Jaw W20 RAL9003
Peeler W20 - 40 RAL9003
SPRING
16
3 M6009103
Screw UNI EN ISO 1207:1996 - M5x35-
A4
17
1 S413570019
Stripper Arm W20
18
3 M6007103
Screw M6x50 UNI6107
19
1 S4135800A5W
Cover 1 Speed W20 RAL9003
20
1
1
1
A94136400
S415130085
M0614303
Assy Socket W20-80
Socket Handle W20/80
Washer Ø7.7xØ25x5.8
Screw M8x20 UNI 6109
Page 22
22
Radial Winch
20 ST
Installation and Maintenance Manual
*Available with service kit; see website www.harken.com
**Winch product sticker
Radial Winch 20 STBBB
BBB = all bronze
Pos. Q.ty Code Description
1
1
1
1
1
1
1
A96874100
S413740085
S413960085
S413720080
S4137300B2
S4137100A7
Assy Housing Winch 20
Housing W20
Bushing Ø9xØ11x9
Bushing Ø9xØ11x12
Heli-coil M6x9
Bushing Ø55xØ62x34
Washer Ø33.5xØ58x5.5
Bushing Ø28xØ33x25
2
12A94136700
S418730080
Assy Gear Z18
Gear Z18
Bushing Ø9xØ11x7
3
4 S000080003
Pawl Ø8*
4
4 S000380001
Pawl Spring Ø8*
5
1 S413700004
Pin
6
1 S413630002
Shaft Winch 20
7 Winch Serial Number Sticker
8
1 S268890080
Washer
9
1 M0604003
Screw M6x12 UNI 5933
10
1 S413620041
Gear Z21
11
1 S4129400A0
Stripper arm support
12
1 S416650043
Drum 20 BBB
13
1 S281670097
Red line
14
1
1
3
A96931900
S413610080
S385970001
Assy Jaws Winch 20 BBB
Lower Jaw W20 BBB
Upper Jaw W20
Peeler W20 - 40
SPRING
15
3 M6009103
Screw UNI EN ISO 1207:1996 - M5x35-
A4
16
1 S693180019
Stripper Arm W20 BBB
17
3 M6007103
Screw M6x50 UNI6107
18
1 A76932000
COVER W20 BBB
19
1
1
1
A94136400
S415130085
M0614303
Assy Socket W20-80
Socket Handle W20/80
Washer Ø7.7xØ25x5.8
Screw M8x20 UNI 6109
20 Winch Product Sticker**
Page 23
23
Radial Winch
20 ST
Installation and Maintenance Manual
*Available with service kit; see website www.harken.com
**Winch product sticker
Radial Winch 20 STCCC
CCC = All-Chrome bronze
Pos. Q.ty Code Description
1
1
1
1
1
1
1
A96874100
S413740085
S413960085
S413720080
S4137300B2
S4137100A7
Assy Housing Winch 20
Housing W20
Bushing Ø9xØ11x9
Bushing Ø9xØ11x12
Heli-coil M6x9
Bushing Ø55xØ62x34
Washer Ø33.5xØ58x5.5
Bushing Ø28xØ33x25
2
12A94136700
S418730080
Assy Gear Z18
Gear Z18
Bushing Ø9xØ11x7
3
4 S000080003
Pawl Ø8*
4
4 S000380001
Pawl Spring Ø8*
5
1 S413700004
Pin
6
1 S413630002
Shaft Winch 20
7 Winch Serial Number Sticker
8
1 S268890080
Washer
9
1 M0604003
Screw M6x12 UNI 5933
10
1 S413620041
Gear Z21
11
1 S4129400A0
Stripper arm support
12
1 S416690043
Drum CCC W20
13
1 S281670097
Red line
14
1
1
3
A96811700
S413610080W
S385970001
Assy Jaws Winch 20 CCC
Lower Jaw W20 CCC
Upper Jaw W20 RAL9003
Peeler W20 - 40 RAL9003
SPRING
15
3 M6009103
Screw UNI EN ISO 1207:1996 - M5x35-
A4
16
1 S413570019
Stripper Arm W20
17
3 M6007103
Screw M6x50 UNI6107
18
1 A76811000
Cover W20 CCC
19
1
1
1
A94136400
S415130085
M0614303
Assy Socket W20-80
Socket Handle W20/80
Washer Ø7.7xØ25x5.8
Screw M8x20 UNI 6109
20 Winch Product Sticker**
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