PenBits Bachmann Class 66, Assembly Instructions Manual, Page: 32 / 61

Slide the central (smaller) of the three idler
gears into position between the plates,
lining up with the axle hole in the middle of the
plates. Press the idler axle into place to retain
the gear.
Similarly fit one of the other two gears and
axles in the remaining idler axle position.
Check that the gears rotate freely.
Now slide the exposed end of the
transmission plate assembly into the cut
end of the larger part of the Drive Unit
moulding.
Slide the remaining idler gear between the
Plates, line it up with the holes in the
plates, line up the holes in the plates with the
holes in the moulding, and insert the idler axle
to retain the axle and plates in position. Check
for freedom of movement between the two
parts of the drive train moulding: it should be
sufficient for the inner axle to move up and
down about 1mm with respect to an imaginary
line joining the centres of the other two axles.
It will probably be much more than this, but if
there is a problem just file back the cut edges of the moulding where they come close.
Check that the three idler gears rotate freely together as they did before disassembly.
If any tightness is present, strip down the gears and ensure that they are clean and
free from any kind of swarf or dust residues.
Bachmann Class 66: Modifying the Bogie Drive 32/60
(c) PenBits Model Railways, All Rights Reserved 27/09/2021