Call us on +44 (0)191 646 1000

257. Top Tips Tuesday - Pre-season Prep - Above Deck

image

GUARD RAILS AND STANCHIONS

Even though they are ‘staring us in the face’ throughout the season, stanchions and guard rail wires are often items that are overlooked during pre-season checks. Stanchions should be checked for security; make sure the base is fastened securely to the deck and/or toe rail, there is no movement and ALL fastenings are in place.

An unstable base is not only dangerous (it could possibly lead to a man overboard situation) but the mechanical fastenings could be the source of a leak into the interior. If the stanchion is secure but there is evidence of water leaking into the interior of the boat, as a stop gap you could apply sealant round the base however the correct fix is to remove the stanchion and re-fix as per our suggestions below. If the base is found to be loose, remove, clean and re-fit using the appropriate sealant, my recommendation is to go for a polysulphide, such as Arbokol 1000 or Geocel 201 as against a silicone sealant.

image

Before refastening a stanchion or any other deck fitting, make sure you remove any old sealant using Debond Marine Formula, degrease the fitting and deck using acetone or similar and, if the hole is not countersunk to accept the sealant do so. Finally, mask both the deck and the base so any excess sealant that is squeezed out as you tighten down can easily be cleaned up. However when bolting down make sure that you don’t squeeze ALL the sealant out, tighten, allow the sealant to set then go for a final turn on the spanner.

Screen Shot 2019-05-02 at 11.16.33

Should there be an issue with the integrity of the deck click here for further guidance.

Check stainless tubular type stanchions where they are drilled (for mid height guard wire to pass through) for signs of stress cracks round the hole. Make sure the stanchion is well secured into its base either by lock nut and bolt or by split pin, however if an alloy stanchion is being secured with a stainless fastening you must use a barrier such as Duralac or TefGel to prevent an electrolytic reaction, same if you are using stainless stanchions in aluminium bases isolate between the two dissimilar metals. Split pins can be very sharp, likewise the end of a stainless bolt. They should be covered in self amalgamating tape or have a blob of clear sealant applied to prevent snagging on footwear, foulies and of course skin!

image

Guard rail wires should be carefully examined for broken strands, especially where the wire exits the swage or Talurit termination and where they pass through stanchions. You will have to slacken each wire and draw it through the stanchion to fully inspect. Flex the wire gently at the start of a termination or where the wire has passed through a stanchion, if any broken or worn strands are found they MUST be replaced. It’s certainly not recommended and highly dangerous to just tape over them! PVC covered stainless steel guard rail wires (banned some years ago for use on offshore race boats) can hide broken or corroded strands, especially where the PVC cover butts up against swage or Talurit terminations. Moisture and a lack of oxygen provide the ideal scenario for crevice corrosion to go unnoticed. Any signs of rust in these areas can be a pointer to wire failure through weakening of the internal wire strands – if rust stains are in evidence, replace without question, preferably with uncovered stainless wire.

image

Ensure pelican hooks in gate assemblies are free to operate, preferably single handed, and that the piston fully engages when closed. Lubricate same with a dry film spray, Boeshield T9 or similar. Incidentally, Wichard have just brought out an automatic locking pelican hook that has been designed for single handed use and the piston engages in a different manner to traditional types. If your method of tensioning the guard rails is a cord lashing (strongly recommended as should you need to 'drop the wire' it's an awful lot quicker cutting the cord) by the pushpit, we would suggest that this is replaced on a regular basis. Check that all the clevis pins, rings or split pins in the assembly are secure and either tape over using self amalgamating tape to avoid snagging, or cover with those rather nice leather boots as blogged about on TTT.193

Screen Shot 2019-05-02 at 11.17.56

If small people or dogs etc are going to be found on board this season and netting is already fitted, examine for signs of degrading through UV exposure and check it is secured to both guard rail wires and toe rail. There’s no point in fitting it if your precious cargo can roll under the lower edge! Remember that saying 'there is no such thing as a free lunch'. Cheaper netting is welded whilst the stronger and, of course, more expensive netting is knotted!

eee5612d-52c3-4d55-b175-8586c783b258

Once you have finished your inspection of guardrails and stanchions, check the security of your bolt on accessories such as the liferaft cradle, horseshoe bracket and while you are in that area, are any electrical cables passing through the pushpit showing signs of chafe?

JACKSTAYS

image

Whether wire or webbing they should be inspected. Check wire termination, especially PVC covered as per guard rail wires, for corrosion. Webbing jackstays should have their stitching checked for integrity, if any nicks or cuts are found in the webbing or if more than 3-4 years old they should be replaced owing to UV degradation of the material. If replacing wire jackstays, consider changing to webbing as an alternative, it is kinder to decks and doesn’t roll under foot.

DECK FITTINGS

image

Mooring cleats, Fairleads, bollards, eye bolts or u-bolts, like stanchions, should be checked thoroughly for movement. Should you suspect a deck fitting as a source of a leak, as we said before the application of a bead of mastic round the edge is only a short term solution! Any shackles securing a block or similar should all be checked for wear and moused with either monel seizing wire or cable ties for added security. However, if using ties and they have been snipped, watch out for razor sharp edges, use a drop of silicone sealant to cover. Water in the fuel last season, was it a 'dodgy' refill or is the fuel filler cap nitrile seal past their sell by date, spare seals are available for the Easy filler caps and some other makes, however if sourcing a seal don't forget diesel rots neoprene in double quick time.

BLOCKS, TRACK AND CARS

image

Blocks, especially ball or roller types, should be given a good rinse with fresh water from a hose to remove all traces of grit. Lubricate ball bearing blocks using Harken’s OneDrop Ball Bearing Conditioner or if plain bearing McLube. Don’t use grease as it will attract and hold grit which makes a very effective cutting compound causing wear. DO NOT oil or grease any Tufnol based block or fitting as it causes the material to swell and will seize sheaves onto pins. Any sheaves that are found to have wear between axle and the sheave (either sideways or vertical play) or nicks in the edges of sheaves which will cause damage to sheets or halyards should be replaced. Check all cam jammers on mainsheet block systems if the teeth are worn or the springs have lost their power replace. Rinse all mainsheet and headsail cars especially those using ball systems with a hose, inspect for wear and lubricate as per blocks. If fitted with plunger stops ensure these are free, lubricate with light oil and make sure they locate correctly in the track system. Check all track fastenings for integrity and make sure all track end stops are securely fastened, any rubber pads within the stops should be replaced if worn.

WINCHES (HALYARDS & SHEETS)

image

Winches should be stripped and cleaned of all grease, if the grease is hardened it may be necessary to use paraffin and a de-greasing agent. Inspect for wear especially pawls (rounding of the edges and cracking), check for play in all bearings and especially those bearings between drum and the gearbox, if drum can be rocked excessively the caged roller (or plain) bearing is most likely worn. Re-assemble using winch grease, don’t use the white stern tube grease as it isn’t suitable for the purpose, and don’t smother parts heavily, a light coating will suffice. Keep grease away from pawls as it will make them stick, only apply a light pawl oil. Replace all pawl springs as a matter of course, a pawl that doesn’t engage through a broken or worn spring subjects the other pawls to overloading which can lead to damage. On self tailing winches check the rope gripper on the top of the winch for signs of wear, if worn replace. A manufacturer’s service kit is recommended as it usually contains most parts that are required for a full service together with an exploded diagram and instructions for stripping and rebuilding the winch. Ex-Geordie Mark Gardiner who works for Harken often jetting off round the world to service Volvo RTW winches and the like some years ago kindly wrote an excellent article on winch servicing, click here to access. Rope clutches, often neglected, should be washed thoroughly and checked for holding power, service kits are certainly available for Spinlock, Easy Marine and Barton, other makes no doubt also please check with our staff.

HEADSAIL FURLING/REEFING SYSTEMS

image

A good hosing out of both the upper swivel and the lower drum unit will remove grit and salt deposits, check both items revolve freely on their bearings, if not rinse again, DO NOT attempt to strip swivels or drum units especially older Furlex units as you will almost certainly lose some of the bearings and possibly damage the retaining circlip(s) during stripping, you may also find it impossible to re assemble the unit without the use of a special press, seek advice regarding this. Only grease systems according to the manufacturers recommendations, some systems use grease, others recommend a dry type lubricant such as McLube. Check the integrity of the furling line especially the knot that secures it to the drum and most importantly are the stanchion leads, if of the sheave type, running freely and check for flats on the sheave. If you haven't introduced some 'friction' when unfurling the genoa to prevent a riding turn on the drum why not consider a Harken ratchet block complete with becket (elastic tied to becket/guardrail to avoid it damage deck or itself)

image

WINDLASS

Last but not least don’t forget the windlass, out of sight out of mind and you certainly don’t want it to fail if you have to up anchor in a hurry! Despite having a great bunch of guys with a shed-load of expert knowledge windlass servicing is not our forte so I make no apologies for reproducing the following maintenance schedule courtesy of Lofrans. A. Clean all external surfaces and hidden points with fresh water and remove all salt layers. B. Grease the rotating parts, particularly, the main shaft threads and clutch cones. Check for evidence of corrosion and mechanical stresses. A coat of Boeshield T9 is recommended. C. Remove and clean the terminals of the electric motor. Coat terminals with Vaseline before re-assembly, then when everything is back in place, spray with Boeshield T9. Test the voltage drop at the terminals. D. Replace all gaskets. E. Remove the anchor windlass from the deck with a little help from Debond, clean all salt deposits and the like from under the base and seal with polysulphide again.

image

Leave a Reply

Sorry, you must be logged in to post a comment.