Lofrans SX7 Vertical Windlass — Installation & User's Manual
INSTALLATION MANUAL
Performance data, cable sizing and wiring, installation, operation, maintenance programme, troubleshooting and the full parts list (Lofrans sale codes) for the Lofrans SX7 vertical windlass (3500W DC, 4000W AC and 8cc hydraulic), with the deck template and the large exploded view.
DocumentLofrans SX7 Vertical Windlass Installation & User's Manual
FormatPDF · 22 pages · 8.8 MB
LanguageEnglish
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Technical Data
| 3500 W | 4000 W | Hydraulic – 8cc | |
|---|---|---|---|
| Power supply (V) | 24 | 230–400 | – |
| Maximum linear load/pull | 3000 kg | 3100 kg | 3700 kg |
| Max lift working load | 800 kg | 840 kg | 1000 kg |
| Amps at work load | 240 A | 9–16 A | – |
| Max line speed | 7 m/min | 8 m/min | 10 m/min |
| Line speed | 9 m/min | 10 m/min | 10 m/min |
| Net weight with drum | 160 kg | 160 kg | 145 kg |
| Max hydraulic pressure | – | – | 200 bar |
| Max hydraulic flow | – | – | 28 l/min |
Line speed is printed higher than max line speed for the 3500 W and 4000 W versions (as printed).
Chain supported: 12 mm ISO4565, 13 mm DIN 766, 14 mm ISO 4565 (gypsies 631042 and 631065).
For hydraulic installation the manual refers to the separate Lofrans document "Hydraulic Windlasses Technical Specification".
Electrical System
| Motor (W) | Voltage (V) | Contactor (A) | Cable 15–25 m / 50–75 ft | Cable >25 m / >75 ft |
|---|---|---|---|---|
| 3500 | 24 | 200 | 95 mm² / 3/0 | * |
* Calculate for a maximum allowed voltage drop of 10%. Cable length is the total run, positive plus negative.
- Wiring diagram for the 4-terminal 3500W 24V motor: battery and fuse, solenoids, motor, deck footswitches UP/DOWN and the Thetis 1002 hand-held remote (Up/brown, Down/blue, Common/battery +).
- Control box/direction solenoids are supplied only with DC-motor units. Mount the box firmly in a dry place near the windlass, away from direct water.
- Circuit breakers: use the Lofrans breakers, chosen for their trip curve; this also keeps the warranty valid.
- Remote control panel: mount where the operator can see the windlass and seal it so the terminals stay dry.
Before You Drill
- Align the windlass precisely with the bow roller.
- The deck faces (above and below) must be parallel; shim to compensate if they are not.
- With all the chain stowed, leave a minimum of 300 mm between the underside of the deck and the top of the heaped chain.
- Bow roller height must keep the chain inclination below 5 degrees.
- Deck thickness: 100–135 mm with the standard series studs and shaft. Other deck thicknesses can be supplied on request.
- Tools: drill, 6 and 16 mm bits for wood and steel, 60 mm diameter hole saw, 10 mm, 13 mm and 17 mm hex keys.
- Electrically conductive or aluminium hulls: insulate the windlass from the deck with a non-conductive gasket (not supplied), and insulate anchor, chain, chain stopper and fixings from the hull. Without this, electrolysis corrodes the windlass quickly.
In the box: windlass with motor/gearbox, control box/direction solenoids (DC units only), handle, chain pipe; the manual is downloaded via the QR code in the package.
Deck and Under Deck
- Place 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°.
- Set the upper part of the windlass on deck. Seal the base with silicone, never with a permanent adhesive, so it can be removed for service.
- Grease the main shaft.
- Join the gearbox to the upper part with the motor positioned away from the chain hole.
- Fit the washers and nuts on the studs and tighten.
- Connect the battery cables to the motor following the wiring diagram.
Chain
- Use calibrated chain matching the gipsy fitted.
- Always fit a swivel (articulated joint) between chain and anchor so the chain does not twist.
- First load: feed the chain through the hole and secure the end to a safe point, wrap it round the gipsy, then recover all the chain under power checking it enters the gipsy aligned.
- A chain pipe is recommended to lead the chain straight into the locker.
Operation
Lowering
- Electrically: clutch tight, brake off, chain fixings off; switch on the safety switch and press DOWN. Switch off and re-engage the chain fixings when done.
- By gravity (free fall): clutch tight, stopper and brake off, then ease the clutch with the handle. Clockwise increases braking (to a full stop), anticlockwise reduces it. Then secure the chain to a strong point.
- A fully released clutch drops the anchor at high speed and can damage the hood and bow roller: always control the speed.
- Wait for the windlass to stop before reversing direction.
Recovery and Warping Drum
- Breaker on, clutch tight, brake off, handle removed, stoppers off; press UP until the anchor seats in the bow roller, then breaker off and chain on the stopper.
- Run the engine or generator during recovery; do not rely on the batteries alone.
- If the 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: brake on and anchor secured; handle in the drum, turn clockwise to release the clutch (drum turns independently of the gipsy), three turns of rope clockwise, press UP. Make the rope fast to a bollard afterwards.
- Never put chain on the warping drum. Always remove the handle when not in use.
- Lay the chain on the seabed without heaping it; motor slowly up over the anchor to ease recovery; slow down as the anchor reaches the bow roller.
- If the windlass stalls, slips or goes into self-protection during recovery, find the cause before carrying on.
Never use the windlass as a mooring point: hold the load on a chain stopper or strong point, and make sure the anchor is stowed and secured when under way.
Maintenance Programme
| Use of the yacht (months) | Less than 2 | From 2 up to 6 | More than 6 | Charter |
|---|---|---|---|---|
| Every 3 months | A – A (as printed) | A – B | A – A | |
| 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 the seals); polish the stainless parts.
- B – Grease the rotating parts with non-conductive yellow marine grease, especially the main shaft threads and clutch cones; check for corrosion and mechanical stress. Anti-seize on the clutch nut and main shaft thread (635494+636441).
- C – Check the motor terminals and test the voltage drop at the terminals.
- D – Replace all gaskets.
- E – Remove the windlass from the deck, clean the salt from under the base and re-seal.
Disconnect power before any maintenance. Skipping the maintenance programme voids the warranty.
The SX7 table prints "A – A" for charter boats every 3 months (as printed). Also disconnect power when the windlass is not used for long periods.
Gipsy Service / Replacement
- Turn the gipsy hand-wheel anticlockwise with the handle to remove it.
- Slide the upper clutch cone, the gipsy and the lower clutch cone off the shaft.
- Wash with running water. Do not use water under pressure.
- Check for corrosion or mechanical stress.
- Reassemble in reverse order, greasing the threads and all moving parts.
Troubleshooting
| Problem | Possible cause | Solution |
|---|---|---|
| Windlass does not run when a control is operated | Protection switch OFF; no voltage; control box, control or motor failure | Set the switch ON; check battery charge and connections; check/replace the control box or control; measure motor voltage – if OK, check and clean the brushes, otherwise replace the motor |
| Chain jams frequently | Locker too shallow 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 | Cables 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 turns neither up nor down | Worn or broken wormwheel/worm teeth; broken motor spindle | (Service) Remove and replace the broken parts, checking no debris has entered the oil; replace the motor, making sure 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 | Tangled chain locker, poor chain (burrs, zinc), chain stowed in a block, worn spring of the emergency mechanism, or stripper fouling the gipsy – the emergency mechanism engages | Fit a swivel after the anchor; inspect and free the chain link by link; pay out all the chain in deep water and recover it; (service) replace the spring; re-centre the stripper on the gipsy or replace it if deformed. The emergency mechanism can be locked by service only with the owner's authorisation – this removes the emergency function |
| Motor runs but the warping drum cannot be used | Drum used in the wrong direction, so the emergency mechanism engages | Warp with the main shaft turning in the same direction as when the gipsy recovers chain |
| Motor and shaft turn, gipsy stays still with the brake band loose | Gipsy not clamped on the clutch cones, or the closing wheel at end of travel; deformed cones with the hubs touching | Check clutch tightening, measure for deformation (shims can help), then replace the damaged clutch and/or gipsy |
| Shaft runs out of true, gipsy and drum wobble | Shaft bent by excessive load | Check use is within the windlass specification; (service) replace the shaft and worn parts |
| Oil leak between motor and gearbox | Loose motor coupling makes the worm run irregularly | (Service) find why the fasteners loosened, check the spindle and worm bore, repair on the bench, check for oil in the motor; replace gaskets, keys, circlips, screws and oil |
| Shaft and studs too short for the gearbox on installation | Wrong deck thickness specified | If the key engages the gearbox over its full length the studs can be adapted; otherwise order a longer shaft |
| Runs slowly and sometimes trips the breaker | Cables too small; poor connections; dirty brushes; water in the motor; deck faces not parallel; gearbox lost oil; motor strains; works in one direction only | Increase cable section; check connections; clean brushes; replace the motor; shim the faces parallel; (service) inspect the gearbox and motor; check for 12/24V between B2–C and B3–C on the control box when each button is pressed – if present and a relay does not work, replace the control box |
Spare Parts
The exploded view (also in the downloads at full size) is labelled with Lofrans sale codes.
| Sale code | Description | |
|---|---|---|
| 630866 | Ring seal 40-72-10 | Ask us to source it → |
| 630882 | Ring seal 55-90-10 | Ask us to source it → |
| 630941 | Bush | Ask us to source it → |
| 631042 | Gypsy 12mm ISO4565 – 13mm DIN766 | Ask us to source it → |
| 631065 | Gypsy 14mm ISO4565 | Ask us to source it → |
| 631222 | Base SX7 | Ask us to source it → |
| 631305 | Bush | Ask us to source it → |
| 631307 | Bush | Ask us to source it → |
| 631327 | Key 8×7×30, DIN 6885 – UNI 6604 – ISO 773, AISI 316 | Ask us to source it → |
| 631344 | Key 12×8×150 (drum version only) | Ask us to source it → |
| 631341 | Key 12×8×60 AISI 316 | Ask us to source it → |
| 631408 | Brake cover | Ask us to source it → |
| 631458 | Drum inox | Ask us to source it → |
| 631618 | Bearing 30205A | Ask us to source it → |
| 631631 | Gearcase | Ask us to source it → |
| 631748 | Bearing 6011 2Z | Ask us to source it → |
| 631749 | Bearing 6014 2Z | Ask us to source it → |
| 631767 | Bearing 51108 | Ask us to source it → |
| 631772 | Nut hexagon nylon lock DIN982 M12 A4 | Ask us to source it → |
| 631788 | Nut hexagon DIN934 M8 A4 | Ask us to source it → |
| 631790 | Nut hexagon DIN934 M12 A4 | Ask us to source it → |
| 631820 | Spiral ring D55mm | Ask us to source it → |
| 631839 | Cone clutch outer | Ask us to source it → |
| 631873 | Cone clutch inner | Ask us to source it → |
| 632051 | Key 12×8×40 C45 | Ask us to source it → |
| 632066 | Flange | Ask us to source it → |
| 632134 | Flange | Ask us to source it → |
| 632137 | Flange | Ask us to source it → |
| 632177 | Brake band (with brake lining) | Ask us to source it → |
| 633223 | Joint | Ask us to source it → |
| 633265 | Gear | Ask us to source it → |
| 633316 | Handle | Ask us to source it → |
| 633428 | Sightglass | Ask us to source it → |
| 633432 | Magnet | Ask us to source it → |
| 633505 | DC motor 24V 3,5KW | Ask us to source it → |
| 633483 | AC motor 230/400V 4,0KW | Ask us to source it → |
| 633298 | Hydraulic motor KM20-8 LEA/EA-N | Ask us to source it → |
| 633528 | Reed sensor | Ask us to source it → |
| 633538 | Spring Project 1000 (nickeled) | Ask us to source it → |
| 633541 | Spring | Ask us to source it → |
| 633547 | Spring | Ask us to source it → |
| 634563 | O-ring NB70, OR 153, int. D=49,20mm, cord D=3,53mm, BS (EN) 830 | Ask us to source it → |
| 634587 | O-ring 6945 | Ask us to source it → |
| 634618 | Pivot | Ask us to source it → |
| 634623 | Brake pivot bracket | Ask us to source it → |
| 634684 | Stud M8×45 | Ask us to source it → |
| 634863 | Washer spring lock DIN127 M8 A4 | Ask us to source it → |
| 634868 | Washer DIN125 M5 A4 | Ask us to source it → |
| 634871 | Washer DIN125 M8 A4 | Ask us to source it → |
| 634876 | Washer DIN125 M12 A4 | Ask us to source it → |
| 635219 | Circlip 15 DIN 471 steel | Ask us to source it → |
| 635286 | Stripper SX7 | Ask us to source it → |
| 635338 | Sensor support | Ask us to source it → |
| 635345 | Support brake pivot | Ask us to source it → |
| 635385 | Support wheel brake inox | Ask us to source it → |
| 635386 | Support stripper (chromed) | Ask us to source it → |
| 635435 | Circlip 90 DIN472 | Ask us to source it → |
| 635494 | Clutch nut | Ask us to source it → |
| 635698 | Worm | Ask us to source it → |
| 635700 | Screw socket set flat point DIN913 8×6 A4 | Ask us to source it → |
| 635704 | Screw socket head DIN912 5×8 A4 | Ask us to source it → |
| 635706 | Screw socket head DIN912 5×16 A4 | Ask us to source it → |
| 635731 | Screw socket head DIN912 12×30 A4 | Ask us to source it → |
| 635743 | Screw hexagon fully threaded DIN933 8×30 A4 | Ask us to source it → |
| 635763 | Screw countersunk hexagon socket DIN7991 8×120 A4 | Ask us to source it → |
| 635771 | Screw countersunk hexagon socket DIN7991 10×30 A4 | Ask us to source it → |
| 635823 | Shaft wheel brake SX7 | Ask us to source it → |
| 635824 | Brake hand-wheel pin SX7 | Ask us to source it → |
| 636225 | Washer spring lock DIN127 M12 A4 | Ask us to source it → |
| 636314 | Lofrans chain pipe SX5/SX7 | Ask us to source it → |
| 636438 | Cover for gearcase SX7 | Ask us to source it → |
| 636439 | Flange SX7 | Ask us to source it → |
| 636542 | Flange satellite holder SX7 (machined) | Ask us to source it → |
| 636441 | Main shaft SX7, L=709,3 | Ask us to source it → |
| 636445 | Gear SX7 | Ask us to source it → |
| 636450 | Wormwheel SX7 | Ask us to source it → |
| 636471 | Pivot dia. 15×55mm for SX7 | Ask us to source it → |
| 636472 | Brake hand wheel for SX7 | Ask us to source it → |
| 636473 | Ring seal 70-85-10 | Ask us to source it → |
| 636474 | Bush 70-75-50 | Ask us to source it → |
| 636476 | Key 12×8×200 A4 | Ask us to source it → |
| 636477 | Circlip 105 DIN 471 steel | Ask us to source it → |
| 636478 | Screw socket set flat point DIN913 8×10 A4 | Ask us to source it → |
| 636488 | Stud M12×200 A4 | Ask us to source it → |
| 636564 | Spacer SX5/SX7 (drum version only) | Ask us to source it → |
| 634835 | Washer 13-30-3 | Ask us to source it → |
SX7 Low Profile Version
| Sale code | Description | |
|---|---|---|
| 636810 | Clutch nut low | Ask us to source it → |
| 630874 | Ring seal 55-72-10 | Ask us to source it → |
| 636795 | Gypsy cap low | Ask us to source it → |
| 636325 | Cone clutch low | Ask us to source it → |
| 636811 | Spring low | Ask us to source it → |
| 610013 | Main shaft SX7 low | Ask us to source it → |
Overall Dimensions & Deck Template
| Dimension | mm |
|---|---|
| Base diameter | Ø264 |
| Gipsy/drum top diameter | Ø132 |
| Height above deck | 375 |
| Deck thickness | 100–135 |
| Below deck (gearbox) | 396.5 |
| Shaft centre to gearbox face | 152 |
| Motor length beyond the gearbox – electric / hydraulic | 482 / 281 |
| Electric motor diameter | Ø222 |
| Depth, brake hand wheel side | 312 |
Read from the general dimension drawings (electric and hydraulic, scale 1:10).
- Deck template (separate download): 4 × Ø16 stud holes on Ø210, Ø60 shaft hole, brake pivot holes, chain lines, the chain pipe cut-out, and the chain-line offset A for 12.5 stud link, 14.5 stud link and 14 short link chain.
- Print at 100% (actual size) and check the 50 mm and 2 inch test lines before marking the deck.
Warranty
- 3 years from the date of purchase by the end user, with normal use and the maintenance programme followed.
- Limited to one year: electric motors and electrical equipment, electronic controls, hydraulic pumps, valves and actuators, gaskets and seals, and products used on charter boats.
- Not covered: wrong choice of windlass, corrosion, UV degradation and wear, missed maintenance, wrong installation, modifications, use outside the specification, and service by persons not authorised by Lofrans.
Need a part that isn't listed? Ask us to source it and quote the part number from the PDF.
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