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INSTALLATION MANUAL

Specifications, gipsy and chain match, cable sizing, installation, operation, maintenance, troubleshooting and the parts list for the Lofrans SX2 vertical windlass, with its drilling, deck and chain-pipe templates.

DocumentLofrans SX2 Vertical Windlass Installation & User's Manual
FormatPDF · 20 pages · 2.6 MB
LanguageEnglish
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Installation ManualPDF · 20 p.Drilling template (print at 100%)PDF · 1 p.Deck template with chain pipe (print at 100%)PDF · 1 p.Chain pipe 636311 template, SX2 & SX3 (print at 100%)PDF · 1 p.
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Lofrans SX2 Vertical Windlass — Installation & User's Manual

Technical Data

1000 W 12 V 1000 W 24 V 1500 W 12 V 1500 W 24 V
Vessel length, heavy duty 35–45 ft 35–45 ft 40–50 ft 40–50 ft
Vessel length, light duty 45–50 ft 45–50 ft 50–55 ft 50–55 ft
Maximum linear pull 1000 kg
2205 lb 		1060 kg
2337 lb 		1200 kg
2645 lb 		1270 kg
2800 lb
Max lift working load 150 kg
331 lb 		160 kg
352 lb 		165 kg
364 lb 		175 kg
386 lb
Current at working load 135 A 70 A 150 A 75 A
Max line speed 40 m/min
131 ft/min 		40 m/min
131 ft/min 		40 m/min
131 ft/min 		40 m/min
131 ft/min
Line speed at working load 20 m/min
66 ft/min 		23 m/min
75 ft/min 		17 m/min
56 ft/min 		19 m/min
62 ft/min
Net weight with drum 20 kg
44 lb 		24 kg
53 lb 		25 kg
55 lb 		25 kg
55 lb
Net weight, low profile 19 kg
42 lb 		23 kg
51 lb 		24 kg
53 lb 		24 kg
53 lb
Gipsy Chain supported
6 mm 6 mm ISO, 6 mm DIN 766
8 mm 8 mm ISO, 8 mm DIN 766, 5/16" G4, 5/16" BBB
10 mm 10 mm ISO, 3/8" G4
10 DIN 766 10 mm DIN 766, 3/8" BBB

Electrical System

Model Motor (W) Voltage (V) Contactor (A) Cable 0–15 m Cable 0–50 ft Cable 15–25 m Cable 50–75 ft
SX2 1000 12 100 25 mm² 3 AWG 35 mm² 2 AWG
1000 24 70 16 mm² 4 AWG 25 mm² 3 AWG
1500 12 125 25 mm² 3 AWG 35 mm² 2 AWG
1500 24 70 16 mm² 4 AWG 25 mm² 3 AWG

Cable lengths are the total run, positive plus negative.

  • Wiring diagrams in the PDF (codes E0015-A, E0016-A, E0017-A) cover 2-, 3- and 4-terminal motors with control box, circuit breaker, 5 A fuse, footswitches, Type C rocker switch and the Thetis 1002 hand-held remote.
  • Control box (solenoids): in a dry place near the windlass.
  • Circuit breakers: use the Lofrans breakers, chosen for their trip curve rather than a plain rating.
  • Remote control panel: where the operator can see the windlass during the manoeuvre, sealed so the terminals stay dry.

Requirements

  • In the box: windlass with motor/gearbox, control box (DC versions), handle, screws.
  • Tools: drill, 9 mm and 15 mm bits for wood and steel, 60 mm hole saw, 10 mm, 13 mm and 17 mm hex keys.
  • Align the windlass precisely with the bow roller; bow roller height must keep the chain inclination below 5 degrees.
  • The deck faces must be parallel; shim the difference if they are not.
  • With all the chain stowed, leave at least 300 mm between the underside of the deck and the top of the heaped chain.
  • Deck thickness: the studs suit 25 to 40 mm (0.98–1.57"); other thicknesses on request.
  • Aluminium boats: insulate the windlass from the deck with a non-conductive gasket (not supplied), and insulate anchor and chain from the hull, including locker and fixings.
  • Lofrans recommends a chain pipe to lead the chain straight into the locker: code 636311 for SX2 & SX3, 636312 for SX3.5, 636313 for SX4, 636314 for SX5.

Fitting

  • Lay the drilling template on deck aligned with the bow; mark and drill. Leave the hole edges sharp but radius the forward edge of the chain hole at 45°.
  • Clean the deck and fit the gasket supplied; set the upper part on deck. Silicone the base if you wish, but never a permanent adhesive.
  • Below deck: grease the main shaft, offer up the gearbox with the motor away from the chain hole, fit washers and nuts to the studs and tighten; wire the motor per the diagram.
  • Models up to 1500 W come with an IP cover that protects the motor from direct water and gives the IP67 rating. It must be fitted for the warranty to be valid.
  • Chain: use calibrated chain matching the gipsy; feed it through the hole and make it fast, wrap it on the gipsy and motor it in, keeping it aligned. Always fit a swivel between chain and anchor.
  • Templates: the SX2 drilling template, the SX2 deck template with chain pipe and the chain pipe 636311 template are A3 sheets drawn at 1:1. Print at 100% and check the test line before you drill.

Operation

Lowering

  • Electrically: clutch tight, chain stoppers off; switch on the safety switch and press DOWN; then switch off and re-engage the stoppers.
  • By gravity: clutch tight, stoppers off, then ease the clutch with the handle. Clockwise brakes the chain (to a full stop), anticlockwise lets it run. Make the chain fast to a strong point.
  • A fully released clutch drops the anchor at high speed and can damage the hood and bow roller: control the speed.
  • Wait for the windlass to stop before reversing direction.

Recovery and Drum

  • Breaker on, clutch tight, handle removed, stoppers off; press UP until the anchor seats in the bow roller; breaker off and chain on the stopper.
  • Do not recover on the batteries alone: run the engine or generator.
  • If the hydraulic-magnetic breaker trips on overload, reset it and wait some minutes before running again. It does not protect the motor from overheating on long runs.
  • Warping drum: anchor secured; put the handle in the drum and turn clockwise to release the clutch (drum now independent of the gipsy); three turns clockwise, tail the rope and press UP; make the line fast on a bollard afterwards.
  • Never use the windlass as a mooring point; hold the load on a chain stopper.

Maintenance Programme

Use of the yacht Less than 2 months From 2 up to 6 More than 6 Charter
Every 3 months A – A (as printed) A – B A – B
Every 6 months A – B
Every 12 months A – B – C C C C – D
Every 24 months D D E
Every 36 months D – E E E
  • A – Rinse all surfaces and hidden points with fresh water and a soft cloth or non-abrasive sponge. No chlorine, bleach or acid: they damage the stainless parts and seals. Polish the stainless parts with metal polish.
  • B – Grease the rotating parts with non-conductive yellow marine grease, especially main shaft threads and clutch cones; check for corrosion and stress. Anti-seize on the clutch nut and main shaft thread (635490+630661).
  • C – Check the motor terminals and test the voltage drop.
  • D – Replace all gaskets.
  • E – Remove the windlass from the deck, clean the salt from under the base and re-seal.

Gipsy Service

  • Turn the drum anticlockwise with the handle and remove it.
  • Remove the 2 M8 screws at the side of the base that hold the stripper, and take it off.
  • Slide off the upper clutch cone, gipsy and lower clutch cone.
  • Wash with running water, never a pressure washer, and check for corrosion or stress; reassemble in reverse order, greasing threads and moving parts.

Disconnect power before any maintenance. Skipping the programme voids the warranty.

Troubleshooting

Problem Possible causes Solution
Windlass does not run when a control is operated Protection switch OFF; no voltage; control box, control or motor failure Switch ON; check battery charge and connections; check/replace control box or control; measure motor voltage, if OK clean the brushes, otherwise replace the motor
Chain jams frequently Locker not deep enough for the chain carried; chain does not suit the gipsy; chain not calibrated Fit the windlass over the deepest point of the locker or carry less chain; change the gipsy; replace chain that is out of tolerance
Windlass turns slowly Cable section too small; deck faces not parallel; bad connections; dirty brushes; water in the motor Increase cable section; shim the faces parallel; check connections; clean brushes; replace the motor
Motor runs, shaft does not turn UP or DOWN Worn or broken wormwheel/worm teeth; broken motor spindle (Service) remove the windlass, replace the broken parts and check no fragments got into the oil circuit; replace the motor and check no broken piece is left in the worm bore. Replace gaskets, screws, keys, circlips and oil at the same time
Motor runs, shaft turns UP but not DOWN The emergency mechanism engages: tangled chain in the locker, poor chain (burrs, zinc), chain stowed in a block, worn emergency spring, or stripper fouling the gipsy Fit a swivel joint after the anchor; inspect and free the chain link by link; lower all the chain in deep water and recover it with the windlass; (service) replace the spring; reposition or replace the stripper. The emergency mechanism can be locked only with the owner's authorisation: this removes the emergency function
Motor runs but the drum will not warp Drum used the wrong way, so the emergency mechanism engages Warp with the main shaft turning in the same direction as the gipsy when it recovers chain
Motor and shaft run, gipsy stays still Gipsy not closed on the clutch cones; clutch or gipsy cones deformed Check clutch tightening, measure for deformation, shim if needed and replace damaged parts; replace the clutch and/or gipsy
Shaft runs out of line with the gipsy and/or drum Shaft bent by excessive load Check the windlass is used within its specification; (service) replace the shaft plus worn parts, gaskets, circlips, keys and oil
Oil leak between motor and gearbox Loose motor coupling makes the worm run irregularly and the seal leaks (Service) find why the fixings loosened, check the spindle and worm bore for ovality and repair on the bench; check for oil in the motor; replace gaskets, keys, circlips, screws, oil and worn parts
Shaft and studs too short for the gearbox at installation Wrong deck thickness given when ordering If the keyed shaft engages the gearbox along its full length, adapt the studs; otherwise order a longer shaft
Runs slowly and sometimes trips the breaker Cable section, connections, brushes, water in the motor, faces not parallel, oil loss, motor labouring, or works in one direction only Increase cable section; check connections; clean brushes; replace the motor; restore parallel faces; (service) inspect gearbox and motor; check 12/24 V across B2–C and B3–C on the control box with each button pressed, and replace the control box if a relay does not work
Finger broken Poor lay of the rope or rolling of the chain broke the finger Replace the finger; if the gipsy cannot work properly with the finger, fit the replacement kit (cap)

Spare Parts

Item numbers are drawing references. The list gives no kit letters.

Lofrans SX2 windlass exploded view

Item Description
226 Washer for M8 screw
227 Nut M8
255 Key 6×6×25
272 Handle
278 Seal 25-47-7
280 Circlip 25 DIN 471
284 Key 8×7×60
304 Seal 40-55-7
307 Spring washer for M6 screw
308 Washer for M6 screw
309 Bearing 6203
311 Thrust bearing 51105
312 Circlip 43 DIN 472
313 Seal 25-43-8
314 Key 5×5×15
351 Hd cap screw M6×20
550 Ring
870 Bearing 6008
915 Cone clutch
920 Gearcase – upper
921 O-ring 4375
922 Sleeve
923 Washer
924 Spring
925 Dog clutch
926 Wormwheel
927 Circlip 40 DIN 471
950 Circlip 47 DIN 472
964 Magnet
965 Sensor
966 Bearing 6005 2RS
1243 O-ring 2287
1304 Complete motor cover kit
1305 O-ring 2375
1306 PG13
1307 Gearcase – lower
1308 Worm
1244a Electric motor 1000 W 12 V
1244b Electric motor 1000 W 24 V
1250a Electric motor 1500 W 12 V
1250b Electric motor 1500 W 24 V
292a Stud M8×75
916a Gipsy chain 06101
916b Gipsy chain 08101
916c Gipsy chain 10101
916d Gipsy chain 10102
917a Main shaft with drum
919a Main shaft without drum
2021 Base SX2
2022 Stripper SX2
2023 Gypsy cap SX2
2024 Drum SX2
2025 M8 stripper bolts
2026 Seal ring 35-45-7 (printed in Italian: "Anello di tenuta")
2027 Hand-wheel X2 #956 CRO (printed in Italian: "Volantino")

Warranty

  • 3 years from purchase by the end user, with the maintenance programme followed.
  • 1 year for electric motors and equipment, electronic controls, hydraulic pumps, valves and actuators, gaskets and seals, and products used on charter boats.
  • Not covered: wrong product choice, use outside the design application, corrosion, UV and wear, skipped maintenance, wrong installation, modifications, removal/transport/installation costs, maintenance by people not authorised by Lofrans.

Need a part that isn't listed? Ask us to source it and quote the part number from the PDF.

Products in this Manual