Deck preparation, sheet lead, drilling pattern, fasteners and the drum-removal procedure.
The winch must be installed on a flat area of the deck, reinforced if necessary to bear a load
equal to at least twice the maximum working load of the winch. It is the installer’s responsibility
to carry out all structural tests needed to ensure that the deck can bear the load.
Harken® does not supply the screws needed to install the winch since these may vary depending
on the deck on which it is to be installed. It is the installer’s responsibility to choose the
correct screws taking account of the loads they will have to bear. Harken® assumes no responsibility
for incorrect installation of its winches or for an incorrect choice of mounting screws.
DangerIncorrect installation of the winch may cause severe injury or death.
Consult the yard that built the boat in the case of doubt over the correct positioning of the winch.
Warning — fasteners and deck strengthFailure to use the correct number and
type of mounting fasteners or failure to ensure the correct deck strength can result in the winch
pulling off the deck suddenly and unexpectedly during high loads causing severe injury or death.
Warning — sheet entry angleVerify the entry angle of the sheet. This must be
8° with a tolerance of ±2°, to avoid sheet overrides and damaging the winch or
making the winch inoperable leading to loss of control of the boat which can lead to severe injury
or death.
Warning — drive gear positionMount the winch on the deck so that the drive
gear is positioned where the sheet enters the winch drum. Incorrect position of drive gear can weaken
the winch leading to failure which can cause an accident leading to severe injury or death.
Procedure — removing the drum
To install the winch, remove the drum and use Socket Head (SH) bolts.
Tools needed: one medium flat-bladed screwdriver.
- Unscrew the central screw — 2 Nm / 18 in-lb
- Slide off the socket n°25 and the cover n°26
- Unscrew the three screws n°24 — 4 Nm / 35 in-lb
- Remove the stripper arm n°28 by rotating and lifting it
- Lift off the drum n°21
Torque figures are the values to apply when re-assembling.
Drilling pattern
| |
40.2 STP |
40.2 STQP |
| Number of holes |
5 |
5 |
| Hole diameter |
Ø 6.2 mm |
Ø 6.2 mm |
| Bolt circle |
Ø 123 mm |
Ø 123 mm |
| Winch outside Ø |
Ø 157 mm |
Ø 180 mm |
| Hole spacing |
35° · 105° · 50° · 70° · 50° · 50° |
Installation procedure
-
A. Position the base of the winch on the deck and mark the position of the holes, or use
the drilling cut-out template at the point where you have decided to place the winch. The drilling
cut-out template is available on the Harken® website.
-
B. Remove the winch and drill the five 6.2 mm diameter holes.
-
C. Bolt the base of the winch to the deck using five M6 Socket Head (SH) bolts
(not supplied by Harken®), correctly chosen for the thickness and type of the boat deck.
Consult the yard that built the boat in case of doubt.
-
D. Fill the mounting holes with a suitable marine sealant.
-
E. Remove the excess adhesive / sealant from the holes and base drainage channels.
-
F. Reassemble the winch following the steps of the Procedure in reverse order, and apply
the products indicated in the section on maintenance.
Warning — bolt materialTo install the winch on the deck, use only bolts in
A4 stainless steel (DIN 267 part 11). Bolts made of other materials may not have sufficient
strength or may corrode, which can result in the winch pulling off the deck suddenly and unexpectedly
during high loads causing severe injury or death.
NoticeTo mount winches on the deck, do not use countersunk bolts.
Before closing the winch, make sure the holes and drainage channels in the base of the winch are
not obstructed.
Positioning the self-tailing arm
Position the self-tailing arm so that the line leaving the winch is led into the cockpit.