Royal Enfield Z-Drive 130, Service Manual And Parts List

Page: 4 / 29

4
DESCRIPTION
The ENFIELD "Z-DRIVE" transom unit is a transom
mounted drive unit incorporating a reverse and
reduction gear. It is suitable for adaption to either petrol
or diesel engines within its power capacity.
Installation is easily accomplished, the standard
mounting plate being arranged to suit a transom raked
aft at 12° to the vertical. Where the transom is at a
different angle an adaptor block is used.
DRIVE
Power from the engine is supplied through a flexible
rubber-metal coupling to the drive unit input shaft. Two
constant-velocity universal joints transmit the power to
the top bevel gears and thence via the floating
mainshaft to the gearshift bevels on the propeller shaft.
PROPELLER ROTATION
The standard propeller rotation is left hand, i.e.
anti-clockwise looking forward when in forward gear.
Rotation can be in the opposite direction so that
contra-rotating twin units may be used.
ENGINE ROTATION
The "Z-DRIVE" transom unit is to be used on
engines which rotate anti-clockwise when viewed from
aft. Clockwise rotation
engines can be used providing manufacturers are
informed when ordering.
GEAR CHANGE
An external lever, on the port side of the unit,
controls the gear change by an internal linkage to the
sliding dog clutch on the propeller shaft. A lock comes
into operation automatically in the astern gear position
to prevent the unit kicking up under reverse propeller
thrust. The external gear change lever is arranged to
suit a single lever control cable and quick release
cable fittings are embodied. Gear positions are
forward, neutral and reverse.
LUBRICATION
The unit must be filled with oil, up to the centre line
of the input shaft. The filler plug Ref.169 is situated on
the upper housing top cover, and the level plug is on
the port side of the upper housing. Ref.172 Plate.E.
STEERING
Steering is by a tiller arm which is adaptable to
either wire rope and pulleys or a proprietary push pull
system.