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55.7 Replace the drag unit into tilt drag housing (141).
56 Further assembly of the tilt drag unit should be performed over a shallow tray to catch any spilt fluid.
Continue as follows:
56.1 Supporting the tilt drag unit with drag adjustment stud (150) upwards, introduce Vinten Fluid No.
3 into tilt drag housing (141) ensuring the fluid fills the space below friction shoe carrier-top (142). This
is a slow process and sufficient time for fluid settlement must be allowed. The chamber must be 3/4
filled.
56.2 Fit omniseal (153) to top plate (154) with the open side towards the fluid.
56.3 Following the manufacturers instructions, apply Blue Hylomar to the top plate mating face of tilt
drag housing (141).
56.4 Exercising great care not to damage omniseal (153) slide top plate (154) over friction shoe
carrier-top (142) and secure with eight M3 screws (155) removed at Para 54.3. Lock screws with
Titanine.
56.5 After ten minutes re-tighten top plate (154) securing screws (75).
56.6 Remove surplus sealant when it has cured.
56.7 When lubricant has ceased to flow from top plate (154) bleed hole fit and secure M2.5 Posidriv
screw (156) with Blue Hylomar sealant.
Refit
57 If repair to the tilt drag unit assembly in isolation has been performed only the procedure at Para 58.5
applies.
58 The tilt drag unit assembly is refitted to the head as follows (Fig 6.5):
58.1 Lightly apply white bearing grease to all moving contact surfaces particularly bearings (62), pan
and tilt brake and tilt drag mechanisms. Ensure braking surfaces are completely free from grease.
58.2 Fit bearing shield (66).
58.3 Insert tilt drag unit assembly (100) into the main casting and retain with snap ring (83).
58.4 Fit brake housing body-tilt (99), with tilt brake shaft (103), shim (104), and brake segment
assembly (6) in position, insert brake flange assembly (101) via the access hole in underside of main
casting, bias brake flange assembly (101) upwards and secure with two M4 screws (24) removed at
Para 52.6.
58.5 Reverse the procedure detailed at Para 52.3 to Para 52.5 using new Scotch Y909 adhesive tape
where required. After Para 52.3.1, check that tilt brake operates correctly and that lower face of brake
flange (102) does not foul main casting (61).
58.6 Refit LH loading bar assembly (130) as detailed at Para 47.
58.7 Comply with Para 6.
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