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14.57.7 Lubricate internal serrations of pan drag knob (3) with white bearing grease and install
on drag knob boss (4) with zero aligned with index mark on mechanism housing and secure with
screw (2). Do not apply Loctite or fully tighten screw (2) at this stage.
14.58 Turn drag knob clockwise to take up slack in the drag mechanism.
14.59 Referring to Fig 6.3, tighten four screws to a torque of 2.82 Nm (25 lbfin.).
14.60 Turn pan drag knob fully clockwise (maximum drag) and allow unit to stand for 24 hours prior to
adjusting the pan drag knob (See “Resetting the drag knobs” on page 22) after assembly of the head.
Balance mechanism
15 If dismantled, assemble the balance mechanism as follows (Fig 6.2):
15.1 Secure buffer (46) to spring end cap (47) using Loctite IS495.
15.2 Lubricate needle roller bearing (39) with white bearing grease and install in actuator shaft (42).
15.3 Trial assemble actuator shaft (42), complete with needle roller bearing (39), into adjustment slide
(38) and install sufficient shim washers (40), equally distributed on each side of the bearing, to leave
minimum side play between the bearing and the adjuster slide when dowel pin (41) is installed.
15.4 Degrease dowel pin (41) and cross holes in adjustment slide (38), apply Loctite 601 to dowel pin
(41) and assemble with shims (40) in position.
15.5 Degrease the threaded bore of actuator shaft (42) and thread of screw (48).
15.6 Lubricate all moving contact surfaces of balance mechanism with Easyrun 50 grease.
15.7 Assemble actuator shaft (42) into spring actuator (43), locate collar (44), spring (45) and spring
end cap (47) on spring actuator.
15.8 Apply Loctite 222E to thread of screw (48) and secure spring end cap (47) to actuator shaft (42),
ensuring that dowel pin (41) lies parallel to trunnions of spring actuator (43).
16 Install the balance mechanism as follows (Fig 6.2):
16.1 Lubricate two shim washers (40) with white bearing grease and fit one onto each trunnion of
spring actuator assembly (43).
16.2 Lubricate needle roller bearing in boss of RH side plate (15) with white bearing grease. Apply
white bearing grease sparingly to outside diameter of boss of RH side plate.
16.3 Locate the boss of RH side plate (15) in bearing (17) in mechanism housing (16) but do not push
the boss fully home. Lay circlip (18) on the end face of the boss.
16.4 Tilt the RH side plate counter-clockwise when looking on the open side of the mechanism
housing and fit the trunnion of the balance mechanism into needle roller bearing in the boss of the RH
WARNING!: The spring actuator assembly (3364-908SP) requires special equipment for
assembly and should not be dismantled. If faulty, it must be replaced.
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