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17.9 Using a degreasing fluid which does not contain an oil-based corrosion inhibitor, thoroughly
clean the face of the friction plate assembly (5).
17.10 Lubricate bearing (27) with white bearing grease and install it in constant drag assembly (8).
17.11 Position tilt brake disc (11) and tilt braked clamp ring (12) on boss of constant drag assembly (8)
and rotate both components to align holes for screws and Spirol pins, noting that there is only one
position in which all the holes are aligned.
17.12 Secure tilt brake clamp ring (12) and tilt brake disc (11) to constant drag assembly (8) with six
screws (24). Do not tighten screws at this stage,
17.13 Install two Spirol pins (10) through tilt brake clamp ring (12) and tilt brake disc (11) into constant
drag assembly (8), ensuring the ends of the pins are driven flush to surface of clamp ring. Tighten six
screws (24).
17.14 Ensure that both faces of tilt brake disc (11) are free from grease.
17.15 Install tilt drag shaft (26) in bearing (27), ensuring it is fully seated.
17.16 Position the spacer (28) in the constant drag assembly (8), with the counterbore towards the
constant drag assembly.
17.17 If constant drag assembly (8), labyrinth (7) or spacer (28) has been replaced it will be necessary
to check that the thickness of shim pack (29) is correct. Otherwise, examine the shims for damage and
replace as necessary. Do not use any shims that are not completely flat. Use a micrometer to measure
the thickness of an undamaged area of the old shim and select a replacement of the same thickness.
17.18 To adjust the thickness of the tilt shim pack:
17.18.1 Fit the 3 mm setting piece to the shim setting tool (T61463) and fully tighten the screw,
Zero the dial indicator. Remove the setting piece.
17.18.2 Ensure that spacer (28) is positioned in the constant drag assembly (8), with the
counterbore towards the constant drag assembly, then install the constant drag assembly in the
shim setting tool.
17.18.3 Fully tighten the screw and read off the figure on the dial indicator. Convert from
millimetres to inches by dividing by 25.3, This is figure (A). Write the figure on the spacer and tilt
drag shaft for future reference.
17.18.4 Remove the assembly from the setting tool.
17.18.5 Figure (B), in thousandths of an inch, will be found written on the labyrinth. This may be
positive or negative figure, or zero.
17.18.6 Add figure (A) to figure (B). This gives the required thickness of the shim pack.
EXAMPLE: A = 0.020 in., B = -2(-0.002 in.). A-B = shim pack thickness = 0.018 in.
17.18.7 Using shims Part No. 3364-253 (0.05mm (0.002in.)), Part No. 3364-254 (0.08mm
(0.003in.)) and Part No. 3364-255 (0.25mm (0.010in.)), assemble a pack of shims of the required
thickness.
17.19 Fit a suitable temporary pin (4 mm dia x 30 mm long) in the tilt shaft to aid alignment of spacer,
shims and labyrinth.
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