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Pan drag unit assembly
Remove
35 The pan drag unit assembly (3) is removed as follows (Fig 6.2):
35.1 Align two notches in periphery of pan drag unit assembly (3) with securing screws (10) of brake
flange assembly (9).
35.2 Unscrew and remove two M4 button head screws (10) and remove brake flange assembly (9).
Do not operate the PAN BRAKE knob (53) if movement of brake housing body (68) is restricted, i.e. in
contact with work bench.
35.3 Unscrew and remove six M5 socket cap head screws (4) and (5) from periphery of pan unit top
plate (224), noting position of two shorter screws for refitting.
35.4 Lift pan drag unit assembly away from head withdrawing square drive of drag actuator shaft
(230) from pan drag lever (76). Remove brake segment assembly (6) from pan brake actuator shaft
(69).
36 To remove the pan drag unit from the assembly proceed as follows (Fig 6.9):
36.1 Support assembly over a shallow tray to catch lubricating fluid as drag unit elements are
separated.
36.2 Remove bleed screw (236) from push-on cover assembly (233).
36.3 Remove push-on cover assembly (233).
36.4 Drain off lubricating fluid.
36.5 Unscrew and remove four M4 socket cap head screws (41) securing friction shoe carrier-top
(228) to pan unit top plate (224).
36.6 Unscrew and remove two M4 socket button head screws (227) retaining pan drag housing (226)
to bearing housing (221).
36.7 Separate pan drag unit sub-assembly from pan unit bearing sub-assembly. Two M4 jacking holes
are provided in top plate (224) to enable the pan drag unit sub-assembly to be pushed out.
Dismantle
37 To dismantle the pan drag unit sub-assembly proceed as follows (Fig 6.9):
37.1 Unscrew and remove four M5 countersunk socket head screws (110) securing friction shoe
carrier-lower (231) to friction shoe carrier-top (pan) (228). Remove friction shoe carrier-lower (231).
37.2 Remove shim (229).
37.3 Withdraw drag actuator shaft (230) from friction shoe carrier-top (228). The four actuator rods
(151) will pivot outwards with the shaft and may be removed.
37.4 Remove second shim (229).
37.5 Remove four friction shoe assemblies (144) and two friction shoe pivots (143).
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