On Jul 24, 1:21*pm, Jim Stewart wrote:
Jon Elson wrote:
Calif Bill wrote:
..........
A friend of mine got hold of a genuine Teletype maint manual for the
ASR33, and I was blown away (we all were) to discover the power-on
lifetime of that model was 2 months. *...

I fixed my share of ASR33's. *Kept clean and lubricated
once a month, they would last far longer than that.

From a 1968 ASR33 manual:

LUBRICATION INTERVAL IN WEEKS
BASED ON 5-DAY WEEK
......
SPEED 0-8 HRS 8-16 HRS 16-24 HRS
60 WPM 39 26 13
100WPM 26 13 6

jsw