Harken Radial 50.2 ST Electric / Hydraulic Winch — Installation & Maintenance Manual
INSTALLATION & MAINTENANCE MANUAL
Ratios, working load, electric and hydraulic performance, dimensions, deck and motor installation, wire sizing, hydraulic ports, service torques and the parts list for the powered Radial 50.2 ST EL/HY winch.
DocumentHarken Radial 50.2 ST Electric / Hydraulic Winch Installation & Maintenance Manual
FormatPDF · 33 pages · 5.0 MB
LanguageEnglish
Specifications
| Power ratio | Gear ratio | |
|---|---|---|
| 1st speed | 11.10 : 1 | 2.40 : 1 |
| 2nd speed | 50.40 : 1 | 10.90 : 1 |
The theoretical power ratio does not take friction into account.
| Version | Weight |
|---|---|
| ST A EH | 16.8 kg |
| ST C / CW EH | 20.0 kg |
| ST A EV | 17.5 kg |
| ST C / CW EV | 20.7 kg |
| ST A HY | 13.5 kg |
| ST C / CW HY | 16.7 kg |
| ST BBB / CCC EH | 21.2 kg |
| ST BBB / CCC EV | 21.9 kg |
| ST BBB / CCC HY | 17.9 kg |
A = anodized aluminium drum; C = chrome bronze drum; CW = chrome/white; BBB = all bronze; CCC = all-chrome bronze. EH = horizontal electric, EV = vertical electric, H = vertical hydraulic.
| Dimension | mm |
|---|---|
| Height | 212.4 |
| Drum Ø | 111 |
| Line entry height | 96 |
| Base Ø | 194 |
Below deck (from the outline drawings)
| Drive | Depth below deck |
|---|---|
| Horizontal electric 12V / 24V | 181 mm |
| Vertical electric | 393 mm (motor 155 mm wide) |
| Hydraulic | 234 mm (motor 130 mm wide) |
Maximum working load (MWL) of the Radial 50.2 ST: 1450 kg (3196 lb). Loads above the MWL can make the winch fail or pull off the deck suddenly.
Performance Data
| Motor | 1st speed line speed | 2nd speed line speed | 1st speed max load | 2nd speed max load |
|---|---|---|---|---|
| Horizontal 12V (1500 W) | 32.7 m/min | 7.2 m/min | 315 kg | 1450 kg |
| Horizontal 24V (2000 W) | 39.4 m/min | 8.7 m/min | 315 kg | 1450 kg |
| Horizontal 48V (2000 W) | 36.9 m/min | 8.1 m/min | 315 kg | 1450 kg |
| Vertical 12V (1500 W) | 37.4 m/min | 8.2 m/min | 315 kg | 1450 kg |
| Vertical 24V (2000 W) | 45.1 m/min | 9.9 m/min | 315 kg | 1450 kg |
| Vertical 48V (2000 W) | 41.6 m/min | 9.2 m/min | 315 kg | 1450 kg |
Line speed measured with no load.
| Motor | Nominal power | Current at MWL |
|---|---|---|
| Horizontal 12V | 1500 W | 230 A |
| Horizontal 24V | 2000 W | 140 A |
| Horizontal 48V | 2000 W | 73 A |
| Vertical 12V | 1500 W | 225 A |
| Vertical 24V | 2000 W | 125 A |
| Vertical 48V | 2000 W | 52 A |
Hydraulic version
| Motor | 1st speed line speed | 2nd speed line speed | 1st speed max load | 2nd speed max load |
|---|---|---|---|---|
| Hydraulic | 55.9 m/min | 12.3 m/min | 315 kg | 1450 kg |
Hydraulic line speed at 20 l/min (5.28 gal/min) oil flow; max load at 130 bar at 20 l/min. Data based on oil at 35 mm²/s (165 SUS) and 50°C (120°F), measured at the motor ports.
Installation
- Flat area of deck, reinforced if needed to take at least twice the MWL.
- Five Ø8.2 mm holes on a Ø150 mm bolt circle plus an Ø80 mm cut-out for the motor; five M8 bolts (not supplied by Harken).
- A4 stainless bolts only (DIN 267 part 11). No countersunk bolts.
- Sheet entry angle 8° ±2°, with the drive gear where the sheet enters the drum.
- Fill the holes with marine sealant and keep the base drain channels clear.
- Check below deck for the flange, motor, wiring or hydraulic lines before drilling.
Getting to the Base
- Procedure 1 (socket-head bolts): pull out the disconnect rod; unscrew the central screw, 2 Nm (18 in-lb); slide off socket and cover (mind the o-ring); remove the three screws, 4 Nm (35 in-lb); rotate and lift off the self-tailing arm; lift off the drum.
- Procedure 2 (hex-head bolts, not for BBB / CCC): unclip the skirt with a screwdriver, fit five M8 hex-head bolts, then press the skirt back until it clips onto the base.
- Position the self-tailing arm so the tail leads into the cockpit. Drilling template on harken.com.
Motor and Electrical
Motor Installation
- Switch off the power before installing or servicing the winch.
- The gearmotor is IP54: mount it below deck, dry, protected and where its condition can be checked.
- The motor can be coupled to the winch in different positions: check the space below deck first.
- Flange: six M6 precote-coated screws, 8 Nm (71 in-lb). Check the seals above and below the flange.
- Reduction gear and motor: two screws, 8 Nm (71 in-lb); align the flange.
- Before sailing, fit a lock-in handle and check the disconnect rod disconnects the gearbox.
- Tools: 5 mm hex key, 6 mm hex key (vertical motor), 10 mm hex key (hydraulic motor), two 13 mm wrenches.
Electrical
- The Harken Dual Function Control Box is mandatory for every model; follow its own manual for wiring.
- Cable terminals go between nut and lock nut; hold the nut with one spanner, tighten with a second, never turn the central spindle.
- Terminal torque no greater than 10 Nm (88 in-lb).
- Contact sequence: nut – cable terminal – self-locking washer – lock nut.
- Third-party electrification kits void the Harken Limited Worldwide Warranty.
Wire size (total distance winch–battery)
| Voltage | Under 5 m (16.4 ft) | 5–10 m (16.4–32.8 ft) | 10–15 m (32.8–49.2 ft) | 15–20 m (49.2–65.6 ft) |
|---|---|---|---|---|
| 12V | AWG 2 / 32 mm² | AWG 0 / 50 mm² | AWG 00 / 70 mm² | AWG 000 / 95 mm² |
| 24V | AWG 5 / 16 mm² | AWG 3 / 25 mm² | AWG 2 / 35 mm² | AWG 0 / 50 mm² |
| 48V | AWG 8 / 8 mm² | AWG 6 / 14 mm² | AWG 4 / 18 mm² | AWG 3 / 25 mm² |
Control box (HCP)
| Winch / voltage | HCP model | Ampere rating |
|---|---|---|
| 50.2 – 12V | HCP1720 | 135A |
| 50.2 – 24V | HCP1717 | 80A |
| 50.2 – 48V | HCP1717 | 80A |
Hydraulic connections
- Two high-pressure lines (in/out, depending on the direction of rotation) plus a low-pressure drain line back to the tank.
- Input/output thread: G 1/2, depth 15 mm. Drain thread: G 1/4, depth 12 mm.
- The motor uses an open centre valve. See the Hydraulic Power Unit and Control Box and Digital System Switch manuals.
Maintenance
Routine
- Wash with fresh water frequently, and after every use.
- Keep teak cleaners and caustic products off anodized, chromed and plastic parts.
- No solvents, polishes or abrasive pastes on logos, stickers, anodized, chromed or plastic surfaces.
- Inspect visually at the start and end of every season.
- Full overhaul, clean and lubricate at least every 12 months; replace worn parts with original parts only.
Overhaul
- Tools: medium flat screwdriver, 6 mm hex key, brush, rags.
- Clean metal parts with a residue-free degreaser; rinse plastic parts in fresh water.
- Check gear and ring-gear teeth, roller bearings and cages, pins and pawls for wear or corrosion.
- Grease gears, pins and teeth lightly with Harken grease, applied with a brush.
- Oil the pawls and springs only. Never grease the pawls: excess grease on the pawls compromises safety.
| Fastener | Torque |
|---|---|
| Central screw | 2 Nm (18 in-lb) |
| Self-tailing arm screws (3) | 4 Nm (35 in-lb) |
| Housing hex screws (5) | 20 Nm (177 in-lb) |
| Jaw screws (4) | 4 Nm (35 in-lb) |
| Motor flange screws (6) | 8 Nm (71 in-lb) |
| Motor terminals | max 10 Nm (88 in-lb) |
Switch off the power first. Before refitting the central screw, check the o-ring in the socket assembly and grease it. Peeler between the jaws with TOP facing up, aligned with the stripper arm.
Radial 50.2 ST Powered Spare Parts
From the STA parts list in the manual. STC, STCW, STBBB and STCCC use different codes for some parts (base, skirt, drum, jaws, stripper arm, cover): check the PDF for your version. Parts marked * come in the Harken service kit. Multi-part assemblies are listed by assembly code.
| Harken code | Pos. | Description | |
|---|---|---|---|
| A94189800 | 1 | Base assembly Winch 50 EL/HY | Ask us to source it → |
| A94134900 | 2 | Skirt assembly Winch 50 | View part → |
| S413020004 | 3 | Gear Z12 | View part → |
| S416050004 | 4 | Pin | View part → |
| S278170002 | 5 | Washer Ø12.5 × Ø48 × 1.5 | View part → |
| S412800041 | 6 | Gear Z30 | View part → |
| S414260004 | 7 | Pawl carrier Ø8 × N2 | View part → |
| S000080003 | 8 | Pawl Ø8 * | View part → |
| S000380001 | 9 | Pawl spring Ø8 * | View part → |
| S415590041 | 10 | Gear Z20 | View part → |
| S415610004 | 11 | Pinion Z11 | View part → |
| A72821800 | 12 | Roller bearing Ø14 × Ø20 × 18 | View part → |
| S281340080 | 13 | Spacer, roller bearings | View part → |
| S413120002 | 14 | Washer Ø22.5 × Ø45 × 1 | View part → |
| S413070004 | 15 | Pin Ø9 × Ø12 × 32.5 | View part → |
| A94156000 | 16 | Gear Z11 assembly | View part → |
| A94134800 | 17 | Housing assembly Winch 50 | View part → |
| M0606303 | 18 | Screw M8 × 25 UNI 5931 | View part → |
| A74135100 | 19 | Bearing Ø85 × Ø97 × 26 | View part → |
| S413520080 | 20 | Spacer | Ask us to source it → |
| A96753100 | 21 | Central shaft assembly Winch 50 | View part → |
| S4129400A0 | 23 | Stripper arm support | View part → |
| S413400053 | 24 | Drum W50 | View part → |
| S281690097 | 25 | Red line | View part → |
| A94134300 | 26 | Jaws assembly Winch 50 | View part → |
| M0601803 | 27 | Screw UNI EN ISO 1207 M6 × 35 A4 | View part → |
| S413440019 | 28 | Stripper arm W50 | View part → |
| M6007103 | 29 | Screw M6 × 50 UNI 6107 | View part → |
| S4134500A5 | 30 | Cover 2-speed W50 | View part → |
| A94149300 | 31 | Socket assembly W35–80 EL/HY | View part → |
| S415070002 | 32 | Disconnect rod W50 | View part → |
Motor, gearbox and drive kits
| Part no. | Description | |
|---|---|---|
| A93127900 | Gear reduction kit 1/24 | Ask us to source it → |
| A94194900 | LM gear reduction kit 1/24 | View part → |
| A94149200 | Electric motor flange kit | View part → |
| A94149200L | Electric motor flange kit, left | Ask us to source it → |
| A96010700 | Electric motor kit 12V 1.5 kW | View part → |
| A96010600 | Electric motor kit 24V 2 kW | View part → |
| A97707300 | Electric motor kit 48V 2 kW | Ask us to source it → |
| S496650053 | Horizontal motorgear flange | Ask us to source it → |
| A96589000 | Performa horizontal motor clutch kit | View part → |
| A94150500 | Vertical motor flange kit | Ask us to source it → |
| A94193700 | Vertical motor clutch kit | View part → |
| G601070E | Electric motor 1.5 kW 12V (vertical) | Ask us to source it → |
| G601060E | Electric motor 2 kW 24V (vertical) | Ask us to source it → |
| G603390E | Electric motor 2 kW 48V (vertical) | Ask us to source it → |
| A93293700 | Vertical gearbox kit (AS16F20.96) | Ask us to source it → |
| G045942000Y | Hydraulic motor W46-60 | Ask us to source it → |
| S415000080 | Hydraulic motor spacer | Ask us to source it → |
| A94193200 | Hydraulic motor clutch kit W46-70 | Ask us to source it → |
| A94149100 | Hydraulic motor flange kit W46-70 | Ask us to source it → |
Ordering Spare Parts
Quote the Harken part number from the parts list and the winch serial number, printed on the plate on the drum support. Parts marked * in the PDF (pawls and pawl springs) are supplied in the Harken service kit.
Parts in this Manual We Carry
Harken part numbers as printed in the installation & maintenance manual, matched to the genuine parts in our store.
Need a part that isn't listed? Ask us to source it and quote the part number from the PDF.
Products in this Manual
-
Harken Winch Circuit Breaker - 80 Amp 12V/24V
HARHCP1717
$93.95 USDList Price: $109.80 USDUnit price /Unavailable -
Harken Winch Circuit Breaker - 135 Amp 12V/24V
HARHCP1720
$93.95 USDList Price: $109.80 USDUnit price /Unavailable
