Andersen 12ST Self-Tailing Winch — Product Manual

Exploded View & Parts List – 12ST V.4.0 / 12ST FS V.2.0.F

The disc 726310 is not linked: the store title restricts it to older winches.

Mounting Instructions

• Tools: large screwdriver, Ø6,5 mm (1/4") drill, 6 pcs. M6 (1/4") countersunk head screws, ring spanner to match the nuts.

1. Remove screws (1), self-tailing arm (2) and drum (4).
2. Mark the bolt holes with the template. The self-tailing arm is fixed in one position on this model – get the arm position right before marking and drilling.
3. Remove the base (13); keep drilling dust away from the winch. Drill Ø6,5mm (1/4") holes.
4. Bed every bolt hole with a light coat of bedding compound, keeping the drain grooves clear, and fasten the base with 6 pcs. M6 (1/4") countersunk screws, large washers or a backing plate.
5. Reassemble and check: drum turns smoothly clockwise by hand and will not turn anti-clockwise; handle clockwise turns the drum, handle anti-clockwise does not.

Mounting template (RON-WMT-12ST-Rev.1, 1:1 on A4): winch base 115mm (4 17/32"), 6 holes 6.50 [1/4"] equally spaced on a 90mm [3 9/16"] P.C.D.; arm fixed in the position shown. Print at 1:1 and check the printed dimensions before drilling.

Service Instructions

• Tools: large and small screwdrivers, winch handle, Andersen winch grease.

1. Remove screws (1), self-tailing arm (2) and drum (4).
2. Insert a winch handle and pull the drive shaft (5) up gently while turning the ratchet gear (15) carefully; remove it.
3. Remove pawls (6) and arm springs (7), then the ratchet gear (15). Do NOT remove the insert plate (14), but check it sits in its groove.
4. Release the roller bearing (8) by gently inserting a small screwdriver between bearing and base (13); remove it and the spring (12). Do NOT remove the pawl (11) and spring (12) on the base.
5. Clean everything in white/mineral spirits, including gear teeth and the roller bearing track.
6. Reassemble, lightly greasing gear teeth, drive shaft, roller bearing, shafts, balls, pawls, springs and bushings with a small soft brush; pawls only a very thin film of Andersen Winch Grease.

When reassembling, push every pawl against its spring: it must move smoothly and snap back to engage the teeth. If not, clean and lubricate; if it still fails, replace the springs. Malfunctioning pawls can release the winch load unexpectedly.

Service Kit No: 18 (art. no. 710018) contains spare parts for this winch.

General Information

• Dismantle, clean and lubricate every second year in normal use; every year under extensive use (racing, charter, blue water sailing).
• Use only Andersen Winch Grease (silicone/Teflon); most other greases, including "marine grease", are not suitable and can cause malfunction.
• Replace the pawl arm springs every second year (spares in the Andersen Service Kit).
• Remove the handle when the winch is under load but not being worked. Use only recommended line sizes; with mooring lines do not use the self-tailer and keep the line off the arm.
• To find the output drive gear: insert a handle and turn both ways – the drive gear only rotates clockwise, in fast and slow speed.
• PVD-coated surfaces: rinse regularly in fresh water, dry with a soft cloth; for grease marks use a mild abrasive-free cleaner such as spray-on glass cleaner – never caustic or abrasive products.

Older Versions

Safety Notices

• Read the manual before installing or operating; operators must understand the winch and its hazards.
• Remove winch handles when not in use.
• Lifting operations: never with the rope in the self-tailer, two persons with constant visual contact, and never use the self-tailer as a cleat for a lifted or suspended load.