Installation manual

HURTH TRANSMISSIONS
CHANGING THE TRANSMISSION FLUID
ACTUATING
LEVER
16mm (8") SCREW
Filter Element
O-RINGS
MODEL 450
FILTER ELEMENT
The Hurth transmission has a filter element located opposite
the dipstick. This filter must be replaced whenever the fluid
is
changed.
Remove the filter
by loosening the screw on the cover using a
6mm Allen wrench.
Twist and pull out the filter and remove the element.
Place
the new filter onto the cover and lock it into place by turning
it clockwise. Check the
O-rings for damage and replace if
necessary. Replacement filters can be obtained from your
local WESTERBEKE dealer or
ZF (Hurth dealer).
Removing the Fluid
Push a suction pump hose down through the pipe hole (under
the filter) to the bottom
of the housing and suck out the fluid.
Remove the oil return line from the cooler and allow the oil
to drain into a container, then reconnect the oil return line.
Wipe down the transmission and properly dispose
of the used
fluid.
Replacing the Fluid
Pour in new Dextron 1Il ATF fluid and check the quantity
with the dipstick.
Transmission fluid quantities will vary with the use
of cool-
ers, length of hoses and the angle of the transmission.
Approximate Quantities
HURTH 45 - 2.12 quarts (2.0 Liters)
HURTH 63 - 3.2 quarts (3.0 Liters)
Reinsert the filter assembly into the housing. Press it
in place
and tighten the Allen screw.
NOTE: Some transmissions use a "T" handle in place of a
screw on their filter assemblies.
After running the engine, shut down and recheck the fluid level.
A WARNING: Neller pull out the dipstick while the
engine Is ronnlng. Hot nuld will splash from the dipstick
hole. This could cause sell ere bums.
MAINTENANCE
Transmission maintenance is minimal. Keep the exterior
housing clean, check the fluid level as part
of your regular
routine, and change the fluid every
300 operating hours.
Periodically inspect the transmission and the cooler for leaks
and corrosion. Make certain the
air vent is clear and when
checking the fluid level look for signs
of water contamination
(fluid will appear as strawberry cream).
Lay-upJWinterize
Storage requires special care. Follow these procedures:
D Drain water from the transmission oil cooler and replace
with a proper mixture of antifreeze coolant.
NOTE: This operation will normally occur when the
engine raw water cooling system is properly winterized.
D Clean up the transmission and touch up unpainted areas
(use heat resistant paint).
D Fill the transmission with Dextron 1Il ATF fluid to pre-
vent internal corrosion (extended storage only, twelve
months
or more).
D Loosen attaching hardware from the transmission output
flange and propeller shaft coupling flange before
remov-
ing the boat from the water. Separate the flanges and
spray with lubricant.
D Inspect the gear shift cable, linkage, and attachments.
Look for corrosion
of the end fittings, cracks or cuts in
the conduit, and bending of the actuator rods. Lubricate
all moving parts.
NOTE: If the transmission is to be stored for a 10llg time
(twelve months or more), it should be topped off with
fluid to prevent internal corrosion. Reduce the fluid level
before putting the engine back into service.
Engines & Generators
37