Smiths Tachometer strange behaviour

b20e · Nov 28th, 2010, 14:55

So.... most of the time my P1800ES tachometer is well behaved
But sometimes its a bit sticky on startup and a tap on the glass seems to do the trick and moves off zero.
Yesterday however it jumped all the way around to 7000 RPM's and stayed there. Now the engine was behaving very well and certainly not doing these RPM's.
Even with engine off but with the ignition on the needle was stubbornly on 7000.
However after several minutues driving it slowly fell back in stages and carried on as nothing had happened.
So please if anyone has any ideas why this happens I would be really pleased to know.
Best wishes
S

Clan · Nov 28th, 2010, 15:04

After 37 years these instruments need a service ! there are capaicitors which go off and the lubricant which is on the needle bearing has turned to grease , There are specialist repairers in UK for these smiths instruments .. Its not just volvos its all the 1970's smiths equipped cars with tachometers . you will probably find it works better in summer :-)

b20e · Nov 29th, 2010, 19:19

Thanks
Be neat if I posted this in the right place too.

Brickhouse858 · Dec 23rd, 2010, 16:04

If I remembor correctly, the ignition fully goes though the tach also. but doesn't seem to be effecting anything. Good luck.

Nov 28th, 2010, 14:55	#1
b20e Simon Good Last Online: Aug 21st, 2019 07:05 Join Date: Apr 2007 Location: Reading View Photos By: b20e	Smiths Tachometer strange behaviour So.... most of the time my P1800ES tachometer is well behaved But sometimes its a bit sticky on startup and a tap on the glass seems to do the trick and moves off zero. Yesterday however it jumped all the way around to 7000 RPM's and stayed there. Now the engine was behaving very well and certainly not doing these RPM's. Even with engine off but with the ignition on the needle was stubbornly on 7000. However after several minutues driving it slowly fell back in stages and carried on as nothing had happened. So please if anyone has any ideas why this happens I would be really pleased to know. Best wishes S

Nov 28th, 2010, 15:04	#2
Clan Experienced Member Last Online: Yesterday 22:51 Join Date: Jun 2007 Location: L/H side	After 37 years these instruments need a service ! there are capaicitors which go off and the lubricant which is on the needle bearing has turned to grease , There are specialist repairers in UK for these smiths instruments .. Its not just volvos its all the 1970's smiths equipped cars with tachometers . you will probably find it works better in summer :-) __________________ My comments are only based on my opinions and vast experience .

Nov 29th, 2010, 19:19	#3
b20e Simon Good Last Online: Aug 21st, 2019 07:05 Join Date: Apr 2007 Location: Reading View Photos By: b20e	Thanks Be neat if I posted this in the right place too.

Dec 23rd, 2010, 16:04	#4
Brickhouse858 Member Last Online: Apr 5th, 2013 22:17 Join Date: Dec 2010 Location: Hanford, California	If I remembor correctly, the ignition fully goes though the tach also. but doesn't seem to be effecting anything. Good luck.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)