Harken 20 St Self-tailing Radial Aluminum Winch User Manual (+ PDF)

The MRW-E Radial Winch 20 ST is a high-quality winch designed
for marine applications. This installation and maintenance manual
provides detailed instructions on how to install and maintain the
winch.

Technical Characteristics

Power ratio 1st speed: 19,20 : 1
Gear ratio: 2,76 : 1

Weights

ST A version: 2.4 Kg
ST C/CW versions: 3.4 Kg
ST BBB/CCC versions: 3.9 Kg

Maximum Working Load

The maximum working load (MWL) for the 20 ST Radial Winch is 550
Kg (1213 lb). It is important not to exceed this limit to prevent
failure or accidents leading to severe injury or death.

Outline

Line entry height: 148 mm, Width: 61 mm

Product Usage Instructions

Installation

DANGER! Incorrect installation of the winch may
cause severe injury or death. Consult the boat manufacturer for
guidance on the correct positioning of the winch.

WARNING! Use the correct number and type of
mounting fasteners to ensure the winch’s stability. Ensure the deck
strength is adequate to handle high loads.

WARNING! Position the winch on the deck so that
the drive gear aligns with the sheet entry point. Incorrect
positioning can weaken the winch and lead to failure, causing
accidents and severe injuries.

NOTICE: For STA, STC, and STCW versions, refer
to the icon on the skirt to identify the drive gear position.

Installation Procedure

The winch can be installed following one of the two procedures
below:

Procedure 1

To install the winch, follow these steps:

Remove the drum.
Use bolts as described in the manual.

Tools needed: One medium flat-bladed screwdriver.

Procedure 2

Refer to the exploded view at the end of the manual for detailed
identification of parts.

For STA, STC, and STCW versions: Install the winch on the deck
using socket head (SH) bolts.
For STBBB and STCCC versions: Install the winch on the deck
using socket head (SH) bolts or hexagonal headed bolts (HH).

Follow the limits and guidelines described on page 4 when
choosing the installation position for the winch.

For more detailed maintenance instructions, including washing,
disassembly, and assembly procedures, refer to the manual.

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Installation and Maintenance Manual
MRW-E
Radial Winch 20 ST

Index

Introduction

Technical characteristics

Weights

Maximum working load

Outline

Installation

Procedure 1

Procedure 2

Installation procedure

Positioning the self-tailing arm

Maintenance

Washing

Maintenance table

Disassembly procedure

Exploded view with maintenance products

Assembly

Harken® limited worldwide warranty

Ordering spare parts

Exploded view

Radial Winch 20 STA, STC, STCW

Parts list

Radial Winch 20 STA

Radial Winch 20 STC

Radial Winch 20 STCW

Exploded view

Radial Winch 20 STBBB, STCCC

Parts list

Radial Winch 20 STBBB

Radial Winch 20 STCCC

Radial Winch 20 ST

2 Installation and Maintenance Manual – Mod.E

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 [email protected] 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

1st speed

19,20 : 1

The theoretical power ratio does not take friction into account.

Gear ratio 2,76 : 1

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

Ø73,5

148

61
Line entry height

Radial Winch 20 ST

Ø137
3 Installation and Maintenance Manual – Mod.E

Installation

Installation
The winch must be installed on a flat 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.

8°
drive gear
SHEET

NOTICE For winch STA, STC and STCW versions only you can find 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.

Radial Winch 20 ST

4 Installation and Maintenance Manual – Mod.E

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 flat-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.

Radial Winch 20 ST

5 Installation and Maintenance Manual – Mod.E

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).

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 flat-bladed screwdriver

To identify the various parts, refer to the exploded view at the end of this Manual.

1. Remove the skirt n°2 with the help of the screwdriver placed as shown by the symbol
Radial Winch 20 ST

2. Take off the skirt n°2
6 Installation and Maintenance Manual – Mod.E

3. Position the 5 M6 hexagonal headed bolts in their holes

4. Reposition the skirt n°2 in its housing

5. Press down the skirt to position it correctly

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).

Radial Winch 20 ST

7 Installation and Maintenance Manual – Mod.E

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
60°

60° 70°

Winch outside Ø137 50°

Ø6.2 n°5

final pinion position
60°

60°
Ø110
B. Remove the winch and drill the five 6.2 mm diameter holes. C. Bolt the base of the winch to the deck using five 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.

Radial Winch 20 ST

8 Installation and Maintenance Manual – Mod.E

Maintenance
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 [email protected]
Disassembly procedure Tools needed
One medium flat-bladed screwdriver A number five 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

Radial Winch 20 ST

9 Installation and Maintenance Manual – Mod.E

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 7. Remove the self-tailing arm support n°12 and slide out the bushing

8. Slide out the central shaft n°7

9. Remove the pin n°6

10. Slide off gear n°3
Radial Winch 20 ST

11. Slide off gear n°11
10 Installation and Maintenance Manual – Mod.E

If it is necessary to replace any jaws of the winch, proceed as follows:

I. Unscrew the 3 screws n°16 ( 4Nm/35 in-lb)

II. Remove the jaws n°15

If it is necessary to remove any pawls in the central shaft, proceed as follows:

Unscrew the screw n°10 and remove the washer n°9 ( 4Nm/35 in-lb)
Once the winch is completely disassembled, clean the parts with a degreasing that does not leave residues, proper to clean metal components; 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. Check the roller bearings and check there are no breaks in the bearing cages. 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!

Radial Winch 20 ST

11 Installation and Maintenance Manual – Mod.E

Exploded view with maintenance products
1
G G
A

A Anti-seize G Harken® Grease O Harken® Pawl Oil T Threadlocker

A
O T
G

2
G
G
Apply Harken® grease where indicated above Apply Harken® grease: 1. on assy socket screw – 2. on drum gear NOTICE On every gear and every component that must be greased, apply Harken® grease with a brush in a proper quantity as shown below:
NOTICE Harken® grease to apply on all teeth: do not use excessive quantity of product to void wastes. If in contact with the pawls, an excess of grease can compromise the safety of the winch.

Radial Winch 20 ST

12 Installation and Maintenance Manual – Mod.E

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 finger.

In case of doubt concerning the assembly procedure contact Harken® Tech Service: [email protected]

Radial Winch 20 ST

13 Installation and Maintenance Manual – Mod.E

Harken® limited worldwide warranty – Ordering spare parts
Harken® limited worldwide warranty
Refer to the Harken® Limited Worldwide Warranty in the Harken® Catalogue and on the website www.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.

W XXXXX XXXXXXXXX

Manufacturer
Harken® Italy S.p.A. Via Marco Biagi, 14 22070 Limido Comasco (CO) Italy Tel: (+39) 031.3523511 Fax: (+39) 031.3520031 Email: [email protected] Web: www.harken.com

Tech Service Email: [email protected]
Customer Service Tel: (+39) 031.3523511 Email: [email protected]

Headquarters
Harken®, Inc. 1251 East Wisconsin Avenue Pewaukee, Wisconsin 53072-3755 USA Tel: (262) 691.3320 Fax: (262) 691.3008 Email: [email protected] Web: www.harken.com

Tech Service Email: [email protected]
Customer Service Tel: (262) 691-3320 Email: [email protected]

Radial Winch 20 ST

14 Installation and Maintenance Manual – Mod.E

Exploded view
Exploded view Radial Winch 20 STA, STC, STCW
20 16
19 15
18
17 13
12 14

Radial Winch 20 ST

15 Installation and Maintenance Manual – Mod.E

Radial Winch 20 STA, STC, STCW

7 9 5 4 11
1 4 5
2
Radial Winch 20 ST

5 4 10
8 6
3
16 Installation and Maintenance Manual – Mod.E

Parts lists
Parts List Radial Winch 20 STA
A = drum in anodised aluminium

Pos. Q.ty Code

1 A94136900

1 S413740085 1 S413960085 1 S413720080 1 S4137300B2 1 S4137100A7

1 A94138600

1 A94136700

2 S418730080

4 S000080003

4 S000380001

1 S413700004

1 S413630002

1 S268890080

1 M0604003

1 S413620041

1 S4129400A0

1 S413560053

1 S281670097

1 A94136500

1 S413610080 3 S385970001

3 M6009103

1 S413570019

3 M6007103

1 S4135800A5

1 A94136400

1 S415130085 1 M0614303

Description Assy Housing Winch 20
Housing W20 Bushing Ø9xØ11×9 Bushing Ø9xØ11×12 Bushing Ø55xØ62×34 Washer Ø33.5xØ58×5.5 Bushing Ø28xØ33×25
Assy Skirt Winch 20 Skirt W20 Winch Product Sticker**
Assy Gear Z18 Gear Z18 Bushing Ø9xØ11×7
Pawl Ø8*
Pawl Spring Ø8*
Pin
Shaft Winch 20
Winch Serial Number Sticker
Washer
Screw M6x12 UNI 5933
Gear Z21
Stripper arm support
Drum W20
Red line
Assy Jaws Winch 20 Lower Jaw W20 Upper Jaw W20 Peeler W20 – 40 Spring
Screw UNI EN ISO 1207 – M5x35- A4
Stripper Arm Winch 20
Screw M6x50 UNI6107
Cover 1 Speed W20
Assy Socket W20-80 Socket Handle W20/80 Washer Ø7.7xØ25×5.8 Screw M8x20 UNI 6109

*Available with service kit; see website www.harken.com **Winch product sticker

Radial Winch 20 ST

17 Installation and Maintenance Manual – Mod.E

Radial Winch 20 STC C = drum in chrome bronze

Pos. Q.ty Code

1 A94136900

1 S413740085 1 S413960085 1 S413720080 1 S4137300B2 1 S4137100A7

1 A94138600

1 A94136700

2 S418730080

4 S000080003

4 S000380001

1 S413700004

1 S413630002

1 S268890080

1 M0604003

1 S413620041

1 S4129400A0

1 S413550043

1 S281670097

1 A94136500

1 S413610080 3 S385970001

3 M6009103

1 S413570019

3 M6007103

1 S4135800A5

1 A94136400

1 S415130085 1 M0614303

Description Assy Housing Winch 20
Housing W20 Bushing Ø9xØ11×9 Bushing Ø9xØ11×12 Bushing Ø55xØ62×34 Washer Ø33.5xØ58×5.5 Bushing Ø28xØ33×25
Assy Skirt Winch 20 Skirt W20 Winch Product Sticker**
Assy Gear Z18 Gear Z18 Bushing Ø9xØ11×7
Pawl Ø8*
Pawl Spring Ø8*
Pin
Shaft Winch 20
Winch Serial Number Sticker
Washer
Screw M6x12 UNI 5933
Gear Z21
Stripper arm support
Drum C W20
Red line
Assy Jaws Winch 20 Lower Jaw W20 Upper Jaw W20 Peeler W20 – 40 SPRING
Screw UNI EN ISO 1207 – M5x35- A4
Stripper Arm Winch 20
Screw M6x50 UNI6107
Cover 1 Speed W20
Assy Socket W20-80 Socket Handle W20/80 Washer Ø7.7xØ25×5.8 Screw M8x20 UNI 6109

*Available with service kit; see website www.harken.com **Winch product sticker

Radial Winch 20 ST

18 Installation and Maintenance Manual – Mod.E

Radial Winch 20 STCW CW = chrome/white

Pos. Q.ty Code

Description

1 A94136900 Assy Housing Winch 20

Housing W20

1 S413740085

Bushing Ø9xØ11×9

1 S413960085

Bushing Ø9xØ11×12

1 S413720080

Bushing Ø55xØ62×34

1 S4137300B2

Washer Ø33.5xØ58×5.5

1 S4137100A7

Bushing Ø28xØ33×25

1 A94138600W Assy Skirt Winch 20 RAL9003

Skirt W20 RAL9003

Winch Product Sticker**

1 A94136700 Assy Gear Z18

Gear Z18

2 S418730080

Bushing Ø9xØ11×7

4 S000080003 Pawl Ø8*

4 S000380001 Pawl Spring Ø8*

1 S413700004 Pin

1 S413630002 Shaft Winch 20

Winch Serial Number Sticker

1 S268890080 Washer

1 M0604003

Screw M6x12 UNI 5933

1 S413620041 Gear Z21

1 S4129400A0 Stripper arm support

1 S413550043 Drum C W20

1 S281670097 Red line

1 A94136500W Assy Jaws Winch 20 RAL9003

Lower Jaw W20 RAL9003

Upper Jaw W20 RAL9003

1 S413610080W Peeler W20 – 40 RAL9003

3 S385970001

SPRING

3 M6009103

Screw UNI EN ISO 1207 – M5x35- A4

1 S413570019 Stripper Arm Winch 20

3 M6007103

Screw M6x50 UNI6107

1 S4135800A5W Cover 1 Speed W20 RAL9003

1 A94136400 Assy Socket W20-80

Socket Handle W20/80

1 S415130085

Washer Ø7.7xØ25×5.8

1 M0614303

Screw M8x20 UNI 6109

*Available with service kit; see website www.harken.com **Winch product sticker

Radial Winch 20 ST

19 Installation and Maintenance Manual – Mod.E

Exploded view
Radial Winch 20 STBBB, STCCC

19 15 14
18
17
16
12 11
20 13

Radial Winch 20 ST

20 Installation and Maintenance Manual – Mod.E

Radial Winch 20 STBBB, STCCC

6 8 4 3 10 1 3 4
Radial Winch 20 ST

4 3 9
7 5
2
21 Installation and Maintenance Manual – Mod.E

Parts lists

Radial Winch 20 STBBB BBB = all bronze

Pos. Q.ty Code

1 A96874100

1 S413740085 1 S413960085 1 S413720080 1 S4137300B2 1 S4137100A7

1 A94136700

2 S418730080

4 S000080003

4 S000380001

1 S413700004

1 S413630002

1 S268890080

1 M0604003

1 S413620041

1 S4129400A0

1 S416650043

1 S281670097

1 A96931900

1 S413610080 3 S385970001

3 M6009103

1 S7180000F0

3 M6007103

1 A76932000

1 A94136400

1 S415130085 1 M0614303
20

Description Assy Housing Winch 20
Housing W20 Bushing Ø9xØ11×9 Bushing Ø9xØ11×12 Bushing Ø55xØ62×34 Washer Ø33.5xØ58×5.5 Bushing Ø28xØ33×25
Assy Gear Z18 Gear Z18 Bushing Ø9xØ11×7
Pawl Ø8*
Pawl Spring Ø8*
Pin
Shaft Winch 20
Winch Serial Number Sticker
Washer
Screw M6x12 UNI 5933
Gear Z21
Stripper arm support
Drum 20 BBB
Red line
Assy Jaws Winch 20 BBB Lower Jaw W20 BBB Upper Jaw W20 Peeler W20 – 40 SPRING
Screw UNI EN ISO 1207 – M5x35- A4
Stripper Arm Winch 20 BBB
Screw M6x50 UNI6107
COVER W20 BBB
Assy Socket W20-80 Socket Handle W20/80 Washer Ø7.7xØ25×5.8 Screw M8x20 UNI 6109
Winch Product Sticker**