Posted by Ian Easton on May 16, 2003 at 01:04:30:
In Reply to: Valve Troubles posted by Mark on May 14, 2003 at 21:15:34:
We have 4 983's at work. A couple of them had quite slow valves (one used to 'catch' on the upstroke) when they were new. How old is yours?
The steps I used:
First I checked the students' hand positions; thinking that if the right hand fingers were pushing the valves sideways, the valves would catch.
Then I resorted to:
Washing the valves and inside the casing with warm water and a little dishwashing liquid. Use a valve brush...rinse thoroughly.
Oil, with a quality valve oil.
If that doesn't help, some lapping may be needed (see the archives): I used Solvol, which is (as far as I can tell) the Australian equivalent of Lava Soap.
Let us know how that works...
Ian Easton