Locate out about Sailboat Engine Gearbox Reconditioning
Locate out about Sailboat Engine Gearbox Reconditioning
One small problem we encountered was how discover the four coupling bolts down into their respective holes once in position. They had wriggled out after some difficulty when removing the gearbox and we done anything about the premise that what came out must again in. However, on re-assembly the angle was so acute, there was not they would line up sufficiently to access the holes in the gearbox coupling flange from the forward engine side.
Well, as predicted, really laid plans very often get interrupted - and totally unique made . with our schedule for having the gearbox back into Patricks' yacht by this Saturday. Our gearbox expert Barry has completed the reconditioning and we have it back with us straight away. However, due to unforeseen circumstances we are in order to fit it this weekend and have put it back to Wednesday this coming week.
Barry, of 'Marine Gearbox Services' is regarded as the very few and fast disappearing doyens of marine gear box maintenance, repair and reconditioning. Another thing years of experience under his belt there is no marine gearbox that he or she doesn't know inside out (excuse the pun) and never appears short. His knowledge on all things gearbox is profound and being very particular in his approach you are usually assured of the best, and have complete confidence in his work.
He showed and explained to us exactly what was causing the problem of the boat slipping out of and back into gear from day to day and what parts were worn and needed replacing. It is far from the purpose as soon as i've to supply a totally detailed manual of the work that had to be done, suffice believed he's competent and that friction clutch plates (sintered bronze) and steels were worn, the selector fork was too slack as was the selector baskeball hoop. All these parts to be replaced along with the bearings, and all seals and gaskets. Any other parts Barry considered had to be replaced as he worked through activity would be.
Believe it or not, the Hurth gearbox does actually contain all those parts. It hard to believe that (a) that many bits are important for a simple forward and reverse gearbox and (b) are accessible fit into that limited space. Hints a wise decision on our part to take it to the expert and not attempt to dismantle it personally. We had a very informative time with Barry and on coming away we wondered what will happen when all the Barrys' of the world stop their work - a rare breed indeed. Meantime however, Barry is fully occupied along with this work and not planning on giving it up any time soon.
Having admired the re-conditioned gearbox featuring a brand new coat of paint from all of the angles and following several false starts (colds, 'flu and strong winds, big chop in a dinghy) Patrick and I find ourselves back on this phone and fully in order to re-install the gear box.
Hunkering down into position in the cramped space we prepare for period of time of heaving brother ql-570 comes with (heavy when you might be kneeling in a cramped position and leaning forward) into the engine bolts then getting all the nuts and washers on and tightened correctly. My suggestion of going on through into the engine, removing the bearings and checking them was met with astonished incredulity! - they were being replaced previously and were fine, so my brand of humour was cured with the contempt it deserved!
The only alternative (after much debate) was to bolt them up by way of the aft side using a spacer under the bolt head. It was actually tried on one, but as the lock nuts are half as thick again as the bolt head, we felt the clearance from the gearbox casing was insufficient - it was down to specific.5mm. In all probability this clearance was enough, but it looked way to acceptable for our liking in addition to in its original position the clearance was around 3mm. What to finish?
In the end it was not difficult - we obtained some shiny new locknuts which Patrick ground down on his workshop grinder, taking off 1.5mm from the underside.
Another dinghy trip out to the yacht saw us crunching down through engine again and fitting the new nuts. Voila! they fitted perfectly, a lot of people additional spacer underneath the bolt head visit had 3mm. clearance between the nuts outer surface (the bolt end being flush with the lock nut) and also the gearbox casing - looked much better, and along with peace of mind, it gave us confidence in a job well done.
All that remained now was to couple to the 'drive saver' along with the shaft coupling refund policy was a cinch. The gear cable strut was then bolted back into position and the gear cable attached ensuring it was slipped into its correct dance.
The moment of truth had arrived when it was time to start the engine and test that the gears would persue and operate correctly. With the engine on and running Patrick slipped it in the forward position - after a moments hesitation there the satisfactory clunk and she or he was in gear - into neutral and into reverse - same clunk again and she was in modify. Grins all round. Everything was working merely because should so the kettle was add to and a sweeter cup of tea was never enjoyed more.
Patrick has just returned from a short time sail up the NSW coast and reports that when motoring the gears are working correctly.
Lessons: With a little time and patience no job cannot be tackled on your own boat.
Never be afraid to consult with the experts - usually it was Barry of Marine Gearbox Services.
When uncoupling the gearbox make sure you leave some coupling flange bolts in position from the flange - incredibly overcome any problems when re-fitting.