Helios-40-2 85mm f1.5 891117 disassembling, cleaning, relubricating

A service video of the vintage soviet lens Helios-40-2 85mm f1.5 SN: 891117

Prior condition of the lens:
Stiff focusing ring
Oily aperture blades

A summary of work done for this lens:
Completely strip off of old soviet grease in the entire lens
Relubricated focusing helicoid with Polar Bear Camer NLGI #00 grease
Relubricated aperture ring mechanism with Polar Bear Camera NLGI #3 grease
All lens elements wiped down with IPA99%
Replaced all old screws with new 303 stainless steel and threadlocked with Loctite 222

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00:00:00 initial inspection
00:01:21 removing tripod collar
00:22:04 disassembling focusing helicoid
00:42:58 cleaning focusing helicoid
01:17:01 relubricating focusing helicoid
02:02:00 removing rear group element
02:09:44 removing aperture ring
02:25:23 removing front group element
02:37:31 cleaning lens block
02:56:38 cleaning aperture ring
03:23:15 relubricating aperture ring
04:30:59 cleaning front lens group
05:00:33 reassembling aperture ring
05:09:45 cleaning rear lens group
05:44:41 threadlocking screws
05:57:23 reassembling tripod collar
06:27:57 final inspection

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