Profurl C480, C520, C530 & R480 Furlers — Installation Manual

Models & Key Data

* Installation with swageless eye: the recommended sail area of the furler and the drum capacity must be respected.

• Every extrusion is 2 m long; one of them (never the lower feeder extrusion) is cut to length.
• Warranty: 10 (ten) years from the date of purchase against parts and materials (conditions in the manual).

Assembly Sequence

1. Turnbuckle cylinder option: remove the screws and the shape adapter, fit the stop screws and the shape adapter to the top of the cylinder, fit the cylinder into the drum mechanism and fit the nippled screws. The inside of the cylinder must be perfectly clean. Unscrew the drum without taking the screws out of the flanges and open the flanges to reach the lower screw.
2. Cutting the extrusions: with the drum mechanism on the stay, measure L; total length of extrusions G = L + 45 mm / + 1 49/64'' for C480, C520, C530 and R480. Mark, cut with a metal saw, trim smooth, then dismantle the drum mechanism.
3. Upper bearing holder (slot near its end): stop washer in the slot, stop screw in the luff groove and tightened; slide the top extrusion up the stay, fit the 1/2 bearings round the wire, turn the bearing 1/4 turn and push the holder in up to the slot.
4. Joints: bearing and joining bearing holder on the stay, into the extrusion until it stops, next extrusion on. Apply the adhesive sealant supplied at the threaded hole and tighten the set screws between 4 and 5 N.m (35–44 lbf.in; 44 lbf.in max). C520/C530 only: 1 short and 1 long bearing holder per joint – slide the short one in, fit the next extrusion, then slide the long one in pushing the short one.
5. Lower extrusion: 1/2 bearing and 1/2 lower bearing holder in until they stop, the second pair round the wire, sealant, then both nippled screws.
6. Halyard swivel onto the extrusions the way shown, with its 2 shackles.
7. Drum mechanism: clean cylinder; holes T1, T2, T3 on line with the lower extrusion holes; tighten T3 first keeping T1 and T2 aligned; glue (delivered) on the lower extrusion stop screws.
8. Wrapstop: measure the stay wire Ø, drill the Wrapstop at Ø minus 1 mm (3/64''), fit and tighten it against the swage terminal with the large diameter facing forward; check it before re-attaching the stay to the mast head. Don't install in strong winds, don't over-bend the extrusions, check grub screws.
9. Turnbuckle adjustment (cylinder or long link plates): unscrew the TRHC screws of the locking devices to remove them, unscrew the turnbuckle cylinder screws and slide the drum mechanism up. Secure the whole extrusion train so it can't fall onto the turnbuckle. Adjust and secure the turnbuckle, then reassemble in reverse order.

Troubleshooting

Dimensions & Link Plates

Values in mm, standard / with turnbuckle cylinder where they differ. Letters refer to the dimension drawings in the manual (pages 27–28); imperial values are printed alongside in the PDF.

Exploded Views & Part Numbers

Profurl prints that only the kit sub-assemblies (bold italic on the drawings) are sold; single parts are listed for identification. Part numbers are as printed in the 2026 manual; the 2017 spare parts booklet shows set screws 53079 and joining kits without the S suffix.

Locking devices & link plates (C480 / C520 / C530 / R480)

VSL / SL / LM / LL = very short / short / medium / long link plates. For the link-plate pin set D the drawing also shows washer 50012 and nut 02258.