18 Oct
2025
18 Oct
'25
3:27 p.m.
On Oct 18, 2025, at 4:12 PM, Van Snyder via cctalk
<cctalk(a)classiccmp.org> wrote:
On Sat, 2025-10-18 at 10:31 -0700, Fred Cisin via cctalk wrote:
Our college 1620 had its 1311 system disk spring a hydraulic leak (the head actuator is
hydraulic in that device). The heads and system pack were cleaned with reagent grade
isopropyl alcohol from the Chemistry department, the leak fixed and the actuator refilled
and bled -- and all was well. That was in 1974 or 1975. Nice job by the local IBM CE.
paul
On Sat, 18 Oct 2025, Adrian Godwin via cctalk
wrote:
But one 1403 at CHM does have a hydraulic fluid leak. Surely those spinning mechanisms in Colossus rely
somewhat on oil. Though I
haven't noticed it spraying a skidmark across the walls.
The 1401 room at the college (55+ years ago) always seemed to have a
"burnt oil" smell. But, that might have been mostly unskilled
maintenance of the EAM equipment. That smell is absent from the
[working!] 1401 at CHM