Pablo_Gg? said:My trusty Silca track pump's (early 1980) pressure gauge needle
resets back to 20 psi rather than 0. This only started showing up
the past month. While pumping it appears to register pressure
increases correctly (although probably off by 20 psi)
This is usually cause by not freeing the valve pin of the Presta valve
after unscrewing the seal nut. In that state far more than 200psi are
required to make the valve open. Such high pressures ruin pressure
gauges whose range is exceeded. When I allowed bikies to pump up
their tires with my floor pumps, about five to six gauges were ruined.
Quoted message said:2 questions:
Quoted message said:1. Might as well take a wack at repairing the gauge first. What is
the technique to resetting the default needle position?
There is a tool called a gauge set that is a tiny wheel puller to pull
off the needle to re-install it in the zero position. This is only a
partial repair because the gauge is damaged.
Quoted message said:2. If that fails, might as well buy a new guage. I know they go for
about 11 bucks, however my concern is regarding the quality of the
newer gauges. Any people using the newer gauges/encountered quality
issues?
My favorite gauge is by Rainbird except that it has a 1/4NPT instead of
1/8NPT (pipe thread) and requires a machining job.
Quoted message said:Thanks in advance.
You can omit "in advance" unless you want to appear illiterate.
Jobst Brandt
[email hidden]
