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4.4 Unscrew and remove balance knob assembly (24) together with Spirol ring (25).
4.5 Remove grub screw (19), which is secured with Loctite, from the RH side of mechanism housing
(15).
4.6 Remove the sliding pin from tool T39300 and install the body of the tool in place of the balance
knob assembly, aligning the hole in the tool with the hole in the end face of adjustment slide (38).
Tighten the tool securing screw until solid, ensuring that the alignment of the hole in the tool is
maintained. As the tool securing screw is tightened, the preload on the balance spring assembly will be
transferred from guide pin (20) to the tool.
4.7 Using a syringe filled with white bearing grease, completely fill the hole in the tool with grease.
4.8 Position the sliding pin in the hole in the tool and drive it in to eject guide pin (20) from the side of
mechanism housing (16).
4.9 To release the screw securing tool T39300, temporarily insert a 3.0mm diameter pin, not less
than 30 mm long, in the hole in the side of the mechanism housing vacated by the guide pin. Ensure
that the pin is fully engaged in the slot in the adjustment slide. The temporary pin must be removed as
soon as the securing screw starts to turn or it will prevent release of the spring preload.
Tilt unit assembly
5 To remove the tilt unit assembly:
5.1 Remove the platform (Para 3).
5.2 Remove the balance mechanism guide pin (Para 4).
5.3 Referring to Fig 6.4, prise off pan brake knob cap (19) and remove the old adhesive from the
knob and cap.
5.4 Release the pan brake. Remove screw (18) and pan brake knob (17).
5.5 Unscrew and remove pan brake shaft (16).
5.6 Referring to Fig 6.2, remove two screws (29), one screw (31) and one screw (32) which secure
the outrigger of the tilt unit to the mechanism housing. Note the positions from which the screws were
removed. These screws are secured with Loctite.
5.7 Withdraw the tilt unit assembly in the direction of the tilt axis until the boss of tilt housing (Fig 6.4
item 1) is clear of bearing (17) in the mechanism housing cover.
6 To dismantle the tilt unit assembly:
6.1 Referring to Fig 6.6, remove drag knob sleeve (1), which is secured with adhesive.
6.2 Turn the drag knob counter-clockwise to the stop, remove screw (2), which is secured with
Loctite, and drag knob (3).
WARNING!: Before attempting to remove the tilt unit assembly or the RH side plate, the
balance mechanism guide pin must be removed to release the preload on the balance
mechanism. Failure to release the balance mechanism preload may result in serious
damage to the head.
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