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Götaverken exhaustvalve

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rederiert



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Registered: November 2005
Posts: 375
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This is the older type of exhaustvalve liftrollers who was driven from two big exenters on crankshaft for each cylinder.
· Date: Fri, 11 February 11 · Views: 423
· Filesize: 57.1kb, 57.1kb · Dimensions: 793 x 899 ·
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Keywords: Götaverken exhaustvalve
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Blackal

Senior Member

Registered: January 2008
Location: Scotland
Posts: 2,823
Mon, 14 March 11 03:46

Those are fairly large conventional nuts on the bottom ends

Does anyone know if there is a primary locking device (so that the split pin is secondary)?

One nut backing off to the split-pin would possibly overload the opposite bottom end bolt?

Al
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SwanseaChief
Member

Registered: December 2010
Location: Swansea
Posts: 78
Wed, 30 March 11 21:24

Hello Al,

There is no other locking device.
The nuts were 'flogged up', using the biggest hammer that you could wield in the crank case and the pin inserted.
Spent many years on 'Victoria', ex - 'Kungsholm' and never had any problems with tension in any of these big assemblies. The pull rods for the exhaust valve yolks were in three sections and they were held together with nuts, tab washers and split pins. They frequently failed but could be retightened whilst running, so long as you didn't mind risking your fingers ! On one high speed run from Madeira to Southampton, I retensioned the pull rod and leaving the spanner in place on the top of the pull rod, lashed it to the yoke, whilst running at 110rpm. There was no other way to 'lock it' and no time to stop. It lasted until Southampton but the Technical Manager wouldn't believe the Chiefs report, that we had returned from a World Cruise, with the engine, 'tied together' !
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