Vinten Vision 30 - Page 29

29
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Refit
19 The end plate/adjustment thread assembly is refitted as follows (Fig 6.7 and Fig 6.2):
19.1 Insert main spring (28) into mechanism block (12).
19.2 Grease thread of main spring adjustment shaft (191) with molybdenum disulphide grease GP50.
19.3 Ensure adjustment nut (201) assembled to collar (197) is screwed up to thrust race (192) on end
bracket (195) by turning adjustment knob (186) fully counter-clockwise.
19.4 Insert main spring adjustment shaft (191) into mechanism block (12) ensuring plain end of shaft
(191) is inserted in the mechanism blocks adjustment shaft bearing (169) (Fig 6.6) and that the guide
roller bearing (199) engages in the lower trackway in the primary mechanism assembly.
19.5 Secure end bracket (195) to main casting (61) with six M6 button head screws (30) removed at
Para 18.4 and one M6 button head screw (31) removed at Para 18.3.
19.6 Turn adjustment knob (186) clockwise two or three turns to apply light pressure to main spring
(28).
19.7 If mechanism block assembly (12) has not been disturbed slacken four M5 button head screws
(14) securing load beam (174) (Fig 6.6).
19.8 Checking that loading bar assemblies (119) and (130) are positioned vertically and that
secondary spring (176) (Fig 6.6) is centrally located in its bore in balance mechanism block (166),
tighten load beam securing screws (14).
Cross members
Remove
20 The procedure for both front and rear cross members (15 and 21 respectively) is similar except that the
rear cross member is fitted with two additional rollers. The procedure is as follows (Fig 6.2):
20.1 Remove platform assembly as detailed at Para 9.
20.2 Remove top cover as detailed at Para 14.
20.3 Remove front cover as detailed at Para 16.
20.4 Remove end plate/adjustment thread assembly and main spring as detailed at Para 18.
20.5 Unscrew and remove M4 button head screw (16) from each end of cross member (15) or (21) -
front or rear respectively.
20.6 Lift cross member (15) or (21) from its locating pins (93) (Fig 6.3).
Dismantle
21 To dismantle the cross member continue as follows (Fig 6.2):
21.1 For each yoke type track roller (17):