Vinten Vision 30 - Page 30

30
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21.1.1 Slacken M3 socket head grubscrew (20) securing axle-cross member roller (19).
21.1.2 Press out axle (19) and remove track roller (17) and its associated shims (18).
21.2 For each lateral guide roller (22) on rear cross member (21):
21.2.1 Unscrew and remove M4 button head screw (24).
21.2.2 Remove bush (23) complete with its lateral guide roller (22).
Assemble
22 The cross members are assembled as follows (Fig 6.2):
22.1 For each lateral guide roller (22) on rear cross member (21):
22.1.1 Assemble lateral guide roller (22) to its bush (23).
22.1.2 Assembly bush (23) and roller (22) to cross member (21) using M4 button head screw
(24) removed at Para 21.2.1. Do not fully tighten screw at this stage.
22.2 For each yoke type track roller (17):
22.2.1 Apply white bearing grease to track roller (17) and faces of shims.
22.2.2 Assemble track roller (17) with one shim (18) on each side face into cross member and
retain with an axle (19) removed at Para 21.1.2. Ensure M3 socket head grub screw (20) is
seated on flat of axle and that axle is flush with inner face of cross member.
22.2.3 Tighten M3 socket head grub screw (20) to retain axle (19).
Refit
23 To refit the cross members continue as follows (Fig 6.2):
23.1 Apply white bearing grease to cross member locating pins (93).
23.2 Very sparingly apply Loctite 221 into tapped hole of locating pins (93).
23.3 Position each cross member on its respective locating pins (93).
23.4 Insert M4 button head screws (16) and evenly adjust both ends of each cross member so that
yoke type track rollers (17) just contact mechanism block tracks (168) (Fig 6.6) with no pre-load. Check
no clearance exists between any horizontal track and associated roller (8 positions).
23.5 Adjust lateral position of mechanism block assembly (12) to equalize clearance between block
(166) should be central with guide roller tracks (90) (Fig 6.3) on inner surface of main casting (61).
23.6 Tighten lateral guide roller screws (24) on rear cross member (21) so that there is no clearance
between rollers and their tracks on mechanism block (166). Do not pre-load.
NOTE: The lateral guide rollers (22) on the rear cross member (21) locate between the two vertical
tracks machined into the rear of the mechanism block assembly (12).