Lofrans Dorado, Kobra & Razza Windlasses (PDF)

OWNER'S MANUAL

Performance data, gipsy and chain/rope match, cable sizing, deck installation, operation, maintenance schedule, troubleshooting and the parts lists for the Lofrans Dorado, Kobra and Razza horizontal windlasses.

DocumentLofrans Dorado, Kobra & Razza Windlasses Installation & User's Manual

FormatPDF · 42 pages · 2.7 MB

LanguageEnglish

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Specifications Electrical Installation Operation Maintenance Troubleshooting Spare Parts Dimensions & Templates Products

Lofrans Dorado, Kobra & Razza Windlasses — Installation & User's Manual

Technical Data

	Dorado 500W 12V	Dorado 700W 12V	Kobra 1000W 12V	Kobra 1000W 24V
Vessel length, heavy duty	20–30 ft	25–35 ft	35–45 ft	35–45 ft
Vessel length, light duty	30–35 ft	35–40 ft	45–50 ft	45–50 ft
Maximum linear pull	630 kg 1386 lb	900 kg 1980 lb	1250 kg 2750 lb	1325 kg 2921 lb
Maximum lift load	345 kg 759 lb	490 kg 1078 lb	625 kg 1375 lb	625 kg 1375 lb
Max lift working load	95 kg 209 lb	125 kg 275 lb	170 kg 374 lb	170 kg 374 lb
Current at working load	65 A	80 A	150 A	80 A
Max line speed	24 m/min 78 ft/min	25 m/min 82 ft/min	32 m/min 104 ft/min	33 m/min 108 ft/min
Line speed at working load	18 m/min 59 ft/min	20 m/min 65 ft/min	16 m/min 52 ft/min	17 m/min 56 ft/min
Net weight with drum	10 kg 22 lb	11 kg 25 lb	21 kg 46 lb	21 kg 46 lb

The technical data table lists the Dorado at 500 W and 700 W; the cable table and the Razza parts list list 500 W and 800 W motors (as printed). The manual gives no performance table for the Razza.

Model	Gipsy	Chain supported	Rope supported
Dorado	6 mm	6 mm ISO, 6 mm DIN 766, 3/16" BBB	10–12–1/2" mm 3-strand; 14 mm 3-strand (as printed)
Dorado	7 mm	7 mm ISO, 7 mm DIN 766, 1/4" G4, 1/4" BBB	10–12–1/2" mm 3-strand; 14 mm 3-strand (as printed)
Dorado	8 mm	8 mm ISO, 8 mm DIN 766, 5/16" G4, 5/16" BBB	12 mm 3-strand; 14 mm 3-strand
Kobra	6 mm	6 mm ISO, 6 mm DIN 766	N/A
Kobra	8 mm	8 mm ISO, 8 mm DIN 766, 5/16" G4, 5/16" BBB	14 mm – 16 mm – 9/16" – 5/8"
Kobra	10 mm	10 mm ISO, 3/8" G4	N/A
Kobra	10 DIN 766	10 mm DIN 766, 3/8" BBB	N/A
Razza	6 mm	ISO, DIN 766	10–12 mm – 3/8" – 1/2"
Razza	7 mm	ISO, DIN 766, G40	10 mm – 12 mm – 14 mm – 3/8" – 1/2" – 9/16"
Razza	8 mm	ISO, DIN 766	12 mm – 1/2"

Electrical System

Model	Motor (W)	Voltage (V)	Contactor (A)	Cable 15–25 m	Cable 50–75 ft
Dorado	500	12	35	25 mm²	4 AWG
Dorado	800	12	70	25 mm²	4 AWG
Kobra	1000	12	100	35 mm²	2 AWG
Kobra	1000	24	70	25 mm²	4 AWG
Razza	500	12	35	25 mm²	4 AWG
Razza	800	12	70	25 mm²	4 AWG

Cable sizes are for the total run, positive plus negative.

Control box (solenoids): delayed-intervention type, rated as in the table, mounted in a dry place near the windlass.
Circuit breakers: use the Lofrans breakers, selected for their trip curve rather than a plain rating.
Remote control panel: mount where the operator can see the windlass during the manoeuvre (deck, helm or cockpit) and seal it so the terminals stay dry.

Before You Drill

In the box: windlass with motor/gearbox, remote control switch or reverser box, drilling template, handle, screws.
Tools: drill, 10 mm bit for wood and steel, 10 mm, 13 mm and 17 mm hex keys.
Bow roller height must keep the chain inclination below 90 degrees (as printed).
The deck faces must be parallel; shim 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.
Aluminium boats: insulate the windlass from the deck with a non-conductive gasket (not supplied), and insulate anchor, chain, locker and fixings from the hull.

Deck Installation

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 and connect the battery leads to the motor.
Seal the base to the deck with silicone.

Operation

Lowering

Electrically: clutch tight, brake off, chain stoppers off; switch on the safety switch, press DOWN; switch off and re-engage the stoppers.
By gravity: clutch tight, stopper and brake off, then ease the clutch with the handle. Clockwise brakes the chain (to a full stop), anticlockwise lets it run.
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, Drum and Override

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 while recovering; 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, clutch off (drum turns independently of the gipsy), three turns clockwise, press UP.
Manual override: clutch engaged, brake and stoppers off, handle in the hand-wheel and turn clockwise against the reducer spring.

Never use the windlass as a mooring point or strong point at anchor: 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. Razza: no chlorine, bleach or acid on the stainless; polish the stainless parts.
B – Grease the rotating parts, especially the main shaft threads and clutch cones; check for corrosion and mechanical stress. Razza: anti-seize on the thread of the #730 conic screw (M10×30).
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.

Gipsy Service

Turn anticlockwise with the handle to remove the gipsy.
Slide off the upper clutch cone, gipsy and lower clutch cone.
Wash with running water, never pressure-wash, 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 cause	Solution
Windlass does not run when a control is operated	Protection switch OFF	Set the switch to ON
	Low voltage in the system	Check battery charge and connections
	Control box failure	Check and if needed replace the control box
	Control failure	Check and if needed replace the control
	Motor failure	Measure motor voltage; if OK, check and clean the brushes; if it still fails, replace the motor
Chain jams frequently	Chain locker not deep enough for the chain carried	Fit the windlass over the deepest point of the locker or carry less chain
	Chain does not suit the gipsy	Change the gipsy
	Chain not calibrated	Check the chain; if out of tolerance, replace it
Protection switch trips often	Switch is not a delayed-response type	Change the protection switch
Windlass turns slowly	Cable section too small	Increase cable section
	Deck faces not parallel	Shim to make them parallel
	Bad electrical connections	Check connections
	Dirty brushes	Clean brushes
	Water in the motor	Replace the motor

Spare Parts

Dorado and Kobra lists use item numbers keyed to the exploded views; only the seal, fastener, key and circlip kits carry Lofrans codes. Kit letters show which kit includes each part.

Dorado (B.22.101)

Lofrans Dorado exploded view

Kit code	Description
KA22101	Kit A – Seals	Ask us to source it →
KB22101	Kit B – Screws & nuts	Ask us to source it →
KC22101	Kit C – Keys	Ask us to source it →
KD22101	Kit D – Circlips	Ask us to source it →

Item	Description	Kit
206a	Gipsy chain 6 – 6 pockets	–
206e	Gipsy chain 8 – 5 pockets	–
206f	Gipsy chain 7 – 6 pockets	–
207	Clutch cone – inner	–
208	Ring	–
210	Key 6×6×15	Kit C
212	Gipsy cap	–
223	Circlip 18 DIN 471	Kit D
226	Washer for M8 screw	Kit B
230	Spring washer for M5 screw	Kit B
231	Washer for M5 screw	Kit B
232	Key 4×4×15	Kit C
233b	Electric motor 500W 12V M.P.	–
233c	Electric motor 700W 12V	–
238	Spring	–
240	Stud M8×45	–
242b	Cap nut self locking M8	Kit B
249	Seal 18×28×7	Kit A
250	Hd cap screw M5×8	Kit B
251	Cover	–
252	O-ring 2325	Kit A
253	Bearing 6006	–
254	Main shaft	–
255	Key 6×6×25	Kit C
256	Wormwheel	–
257	Body	–
258	Stripper	–
259	Hd cap screw M8×16	Kit B
260	Spring washer M8	Kit B
261	Bearing 6001	–
262	Worm	–
263	Thrust bearing 51104	–
264	Circlip 37 DIN 472	Kit D
265	Seal 20×37×7	Kit A
266	Cap nut M5	Kit B
267	Finger	–
268	Nylon bush	–
269	Gasket	–
842a	Handle	–
886	Chain pipe	–
887	Pin	–

Kobra (B.08.101 Rev. A)

Lofrans Kobra exploded view

Kit code	Description
KA08101	Kit A – Seals	Ask us to source it →
KB08101	Kit B – Screws & nuts	Ask us to source it →
KC08101	Kit C – Keys	Ask us to source it →
KD08101	Kit D – Circlips	Ask us to source it →

Item	Description	Kit
209	Key 6×6×30	Kit C
217	Hex hd screw M8×20	Kit B
226	Washer for screw M8	Kit B
268	Nylon bush	–
276a	Gipsy chain 6 ISO – DIN 766	–
276b	Gipsy chain 7 ISO – 1/4" G40	–
276c	Gipsy chain 8 ISO – DIN 766 – 5/16" BBB	–
276d	Gipsy chain 5/16 G40	–
276e	Gipsy chain 10 ISO – 3/8 G40	–
276f	Gipsy chain 3/8 DIN 766 – 10 DIN 766	–
276g	Gipsy chain 3/8 BBB	–
276h	Gipsy chain 3/8 PC	–
277	Clutch cone – inner	–
307	Spring washer for screw M6	Kit B
308	Washer for screw M6	Kit B
311	Thrust bearing 51105	–
312	Circlip 43 DIN 472	Kit D
313	Seal 25×43×9	Kit A
314	Key 5×5×15	Kit C
315a	Electric motor 700W 12V	–
315b	Electric motor 700W 24V	–
315c	Electric motor 1000W 12V	–
315d	Electric motor 1000W 24V	–
316	O-ring seal 117	Kit A
317	Wingnut	–
318a	Clutch cone – outer	–
318b	Clutch cone – outer (for gipsy type e-f-g-h)	–
319	Seal 25×42×6	Kit A
320	Hd cap screw M6×16	Kit B
321	Cover	–
322	O-ring seal 4437	Kit A
323	Bearing 6005	–
324	Circlip 25 DIN 471	Kit D
325	Washer	–
326	Spring	–
327	Dog clutch	–
328	Wormwheel	–
329	Main shaft	–
332	Pawl	–
333	Spacer	–
335	Stripper for gipsy type a-b-c-d	–
335a	Stripper for gipsy type e-f-g-h	–
336	Oil plug 3/8"	–
339	Nylon washer	–
340	Emergency wheel	–
341	Emergency dog clutch	–
342	Spring	–
343	Drum	–
344	Washer	–
345	Hex hd screw M6×20	Kit B
352a	Handle	–
357	Nylon washer for screw M6	Kit B
359	Cap nut M6	Kit B
369	Washer for screw M10	Kit B
460	Hex hd screw M10×20	Kit B
471	Body	–
472	Bearing 16100	–
473	Worm	–

Razza (2024)

Lofrans Razza exploded view and parts list

Lofrans part no.	Item	Description
630974	206A	Gypsy 6 mm	Ask us to source it →
636642	206E	Gypsy 8 mm	Ask us to source it →
635423	223	Circlip 18 DIN 471	Ask us to source it →
634871	226	Washer M8 DIN 125	Ask us to source it →
631310	232	Key 4×4×15	Ask us to source it →
633531	238	Spring D8	Ask us to source it →
06288	242	Nut M8 DIN 986	Ask us to source it →
06286	249	Ring seal 18×28×7	Ask us to source it →
06296	250	Screw M5×8 DIN 912 A4	Ask us to source it →
631582	251	Cover	Ask us to source it →
634571	252	O-ring int. D82.27, cord D1.78	Ask us to source it →
631743	253	Bearing 6006 2RS	Ask us to source it →
631314	255	Key 6×6×25	Ask us to source it →
631538	256	Wormwheel	Ask us to source it →
631738	261	Bearing 6001	Ask us to source it →
635684	262	Worm	Ask us to source it →
631763	263	Bearing 51104	Ask us to source it →
06287	264	Circlip 37 DIN 472	Ask us to source it →
630845	265	Ring seal 20×37×7	Ask us to source it →
635706	351a	Screws M5×16 DIN 912 A4	Ask us to source it →
06295	351b	Screw M5×20 DIN 912 A4	Ask us to source it →
06285	351c	Screw M5×35 DIN 912 A4	Ask us to source it →
635705	691	Screw M5×12 DIN 912 A4	Ask us to source it →
635311	887	Pin 3×14 DIN 7	Ask us to source it →
634868	923	Washer M5 DIN 125	Ask us to source it →
634860	924	Spring lock M5 DIN 127	Ask us to source it →
04241	965	Sensor IRIS II	Ask us to source it →
631828	1049	Cone clutch	Ask us to source it →
06101	1204	Finger	Ask us to source it →
600100	1215b	Sealing gasket	Ask us to source it →
631836	1222	Cone clutch	Ask us to source it →
633520	1231	Motor 500W	Ask us to source it →
636050	1231B	Motor 800W	Ask us to source it →
636352	2011	Gypsy cap	Ask us to source it →
06105	2040b	Stripper	Ask us to source it →
06096	2257	Gearcase	Ask us to source it →
06294	2406	Stud M8×50 DIN 976 A4	Ask us to source it →
06235	2546	Shaft	Ask us to source it →
06098	4656	Motor cover	Ask us to source it →

Dimensions & Drilling Templates

Dorado

Kobra

Razza

Using the Templates

Dorado: three Ø10 mm (3/8") holes; one cut-out area is marked for the 700 W motor only.
Kobra: four Ø11 mm (7/16") holes; the separate Kobra deck template is in the downloads.
Razza: three Ø10 mm holes.
Print the template pages from the PDF at actual size (1:1) and measure the printed dimensions before cutting the deck. The Razza template and the separate Kobra deck template both warn that a print may not be to scale.

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