D14/4
ENGINE
B10
FIG. B10.
New clutch springs have a free length of 1-9/64"
(29 mm.) and if this length has reduced by more than
1/32" (0·8 mm.) it is recommended that a new set be
fitted.
The four driving plates have segments of a special
friction material securely bonded to the metal.
All these segments should be complete and
unbroken. Even if there appears to be no damage to
the plates or segments, the overall thickness of each
segment should be measured. The thickness of a new
driving plate is
⅛
" (3·2 mm.) and if the wear is
excessive the plates should be renewed.
The tags on the outer edges of the plates should be a
reasonable fit in the housing slots. If there are any
burrs on the tags, renew the complete plate.
The three plain driven plates should be free from
score marks, and must be perfectly flat. To check the
latter lay the plate on a piece of plate-glass, or other
known flat surface: if it can be rocked it is obviously
buckled and must be replaced with a new one.
Service tool No. 61-3796 must now be used to pull
the engine sprocket off the tapered shaft, but do not
forget to first screw in the protector bolt, as the end of
the shaft is easily damaged. After removing the
sprocket, tap out the small Woodruff key, and take off
the rubber oil seal and steel collar.
The crankcases are now about ready for splitting.
First take out the twelve Phillips-head screws from
around the outer edge of the case on the generator
side, two of which are to be found below the cylinder
barrel flange, and then remove the four screws from
around the gearbox sprocket.
Tap out the two hollow dowels from each end of the
case, through the upper engine bolt holes, using a
suitable drift.
The crankcase halves can now be parted by gently
tapping with a hide-mallet. Under no circumstances
should any attempt be made to lever the crankcase
halves apart as this will cause irreparable damage to
the joint face.
When the crankcases have been separated the sleeve
pinion can be tapped out of the bearing in the left-hand
crankcase. Check for any shims stuck to the main
bearing.
The flywheels can now be removed from the right-
hand half, by tapping the crankcase with a hide-mallet
taking care not to damage the joint faces. Take careful
note of the number and positions of any shims on
either of the flywheel shafts.
GEARBOX DISMANTLING
First take off the loose fitting light coil spring, and lift
the selector plate off the gearchange spindle.
Withdraw the spindle, complete with return spring
from the case.
Summary of Contents for D14/4 BANTAM SUPREME D14/4 BANTAM SPORTS
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Page 28: ...D14 4 ENGINE B2 FIG B1 Engine exploded ...
Page 47: ...D14 4 CARBURETTER C2 FIG C 1 Concentric carburetter exploded ...
Page 55: ...D14 4 FRAME AND FITTINGS D2 FIG D1 Frame dimensions ...
Page 100: ...D14 4 ELECTRICAL SYSTEM G14 FIG G8 Wiring diagram all models except Bushman Pastoral ...
Page 101: ...D14 4 ELECTRICAL SYSTEM G15 FIG G9 Wiring diagram Bushman Pastoral models ...