MD 17D w/. power take off to a compressor
which is mounted to the bulkhead uses 2 belts. Refer Compressor
is hinged and a spring provides tension for the belts. The flywheel is perilously close to the compressor case... but if things remain as they are ... no problem.
Recently we were motor
sailing and heeled over and heard occasional knocking which turns out to be the flywheel banging into the compressor when it was not operating. This led to the paint
being stripped off the flywheel as it was being ground by a bolt mounting (not used) on the compressor.
I am trying to figure out what's up... My thoughts are as follows:
1. The engine
mounts are soft (bolts are tight) and allow the engine
to tip a bit toward the compressor when heeled.
2. the compressor belts (replaced last year) may be a tad too short pulling the engine closer to the compressor
3. the spring is too weak and doesn't hold the compressor away from the engine (enough)
When I step / push down on the compressor belts BOTH then engine and the compressor move toward each other. I can't remember if this is normal... But the engine mounts of course have some flex.
This system worked for 20 something years although over the last several I did notice some paint
wear on the flywheel. it only seems rather exaggerated and the knocking noise
sailing heeled ill advised? How much heel would be acceptable if any when motoring? Of course without the compressor this condition does not exist... but then the refer is useless.
There's little to possibility to reposition the compressor. I wedged a block or wood between the engine and the engine room bulkhead which prevents the engine from moving in that direction. I am thinking of replacing the wood with a threaded metal pipe to resist the engine movement. Is this a crazy idea?
Thanks for your comments!