Pentax ist DL Service Manual page 17

3. 0-G100
(1) Apply G126 at 11 positions and apply L115 at one position.
(2) Install B20 to B11.
(3) B11--- Hook spring to shaft of mirror sheet.
[Note] Caution for come off spring.
(4) B19
(5) B10
(6) B21
(7) Install B17 to B9.
(8) Install B18 and B9.
(9) 0-B8
--- Apply G126 to surface of cam.
(10) B7
--- Apply G126 to surface of cam
on both side.
(11) Align the both hole of 0-B8 and B7.
(12) B3
(13) B4
(14) B5
(15) B6
(16) Turn B7 clockwise until the arrow indicated in figure right.
(2)
(6)
(7)
(15)
(14)
(13)
(12)
76570EM 16
(1)
L115
G126
(3)
(5)
(4)
(8)
(9)
(11)
(10)
(16)