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Balance mechanism
12
Assemble/install the balance mechanism as follows (
Fig 6.3
):
12.1 If the bearing (22) has been removed from the mechanism housing cover (21) a replacement
may be installed without heating the cover. It is essential that a suitable press, fitted with a mandrel
adaptor and support ring to match the bearing, is used. Proceed as follows:
12.1.1
Remove all traces of adhesive from bearing and seating in mechanism housing cover.
Degrease bearing seating and outer race of bearing.
12.1.2
Apply Loctite 641 to outer race of bearing and press into mechanism housing cover,
ensuring bearing is correctly seated.
12.2 Assemble the pan mechanism (
Para 10
)
12.3 Assemble the tilt mechanism (
Para 11
).
12.4 Using Loctite 495, adhere buffer (32) to end washer (33).
12.5 Lightly lubricate components as follows:
12.5.1
All moving contact surfaces of the balance mechanism with grease GP50.
12.5.2
All bearings and shims with white bearing grease.
12.6 Fit equal numbers of shim washer (19) on each side of bearing (18) to minimise side play
between the adjuster slide (17) and actuator shaft (29).
12.7 Using tool
3431-912TL
, secure dowel (20) in adjustment slide (17) using Loctite 601.
12.8 Assemble actuator shaft (29), spring actuator (30), spring (31) and end washer (33).
12.9 Apply Loctite 270 to screw (34) and tighten to allow about 2 mm (1/12 in.) clearance.
12.10 Position circlip (11) inside the mechanism housing.
12.11 Install two shim washers (19) on spring actuator (30). Holding the assembled balance
mechanism with the slot in the adjustment slide (17) facing downwards, position the balance
mechanism in the mechanism housing (16).
12.12 Turn the balance mechanism through 90°, until the slot in the adjustment slide (17) aligns with
the hole in the mechanism housing (16) and needle roller (15) can be pushed fully home.
12.13 Install bearing shim (9) on RH side plate (7).
12.14 Install RH side plate (7) in mechanism housing (16), ensuring spring actuator (31) engages with
needle bearing. Secure with circlip (11).
12.15 Install mechanism housing cover (21) on mechanism housing (16) and secure with three screws
(23).
NOTE:
The remaining assembly of the balance mechanism, side plate, tilt mechanism and final
adjustment of the balance spring must be completed before the Loctite on screw (35) sets.