Zf Transmissions - Westerbeke 44A FOUR - 35C THREE Operator's Manual

ZF MARINE· TRANSMISSIONS
INITIAL OPERATION
All HBW marine transmissions are test-run on a test stand
with the engine at the factory prior to delivery. For safety
reasons the fluid is drained before shipment.
Fill the gearbox with Automatic Transmission Fluid
(DEXRON II or DEXTRON III). The fluid level should be
up to the index mark on the dipstick. To check the fluid level,
just insert the dipstick, do not screw it in. Screw the dipstick .
into the case after the fluid level is checked and tighten. Do
not forget the sealing ring under the hexhead of the dipstick.
Check for leaks and change the fluid after the first 25 hours,
also make a visual inspection of the coupling, oil cooler and
hoses, and shift cables.
NOTE: Keep vent
FLUID LEVEL
Change the fluid for the first time after about 25 hours of
operation, then every 250 operating hours or at least once a
year or when you change engine oil.
Removing the fluid
Push a suction pump hose down through the dipstick hole to
the bottom of the housing and suck out the fluid. (If space
allows, use the transmission drain). Remove the drain plug
from the bottom of the transmission and allow the fluid to·
drain into a container, then reinstall the plug with its sealing
washer. Wipe down the transmission and properly dispose of
the used fluid. After running the engine, shut down and
recheck the fluid level.
Drain plug torque 20 - 25 Mbs
NOTE : When changing the fluid, take care not to lose the
drain plug sealing washer. The drain plug will leak without
this sealing washer.
A
WARNING:
Never pull out the dipstick while the
engine is running. Hot fluid will splash from the dip·
stick hole. This could cause severe burns.
41
OPERATING TEMPERATURE
The maximum permissible ATF temperature should not exceed
230°
(110~.
This temperature can only be reached for a short
time.
A
CAUTIO~ffthe·transmissio"f/uid
temperature is
too high$ stop the engine immediately and check the
transmission fluid.
LOCKING THE PROPELLER
Locking of the propeller shaft by an additional brake is not
required: use the gear shift lever position opposite your direc-
tion of travel for this purpose. Never put the gear shift in the
position corresponding to the direction of travel of the boat.
WHEN UNDER SAIL OR BEING TOWED
Rotation of the propeller without load, such as when the boat is
being sailed, being towed, or anchored in a river, as well as
operation of the engine with the propeller stopped (for charg-
ing the battery), will have no detrimental effects on the trans-
mission
DAILY OPERATION
D
Check the transmission fluid.
D
Visually check the gear shift linkage and transmission.
D
Start the engine in neutral, allowing a few minutes at
idle to warm the fluid.
D
Shift into gear.
NOTE : Too low an idle speed will produce a chattering noise
from the transmission gear and damper plate. In such cases
the idle speed should be increased
For additional information refer to the following text in this
Transmission Section: SHAFT COUPUNGS, MAINTENANCE
AND TRANSMISSION TROUBLESHOOTING.
ZF TRANSMISSIONS SPECIFICATIONS
General
Gear Ratio (optional)
Note: There are a variety
of gear ratios available.
Only a few are listed.
Lubricating Fluid
Propeller Shaft
Direction of Rotation
(ZF Standard Transmission) Case
hardened helical gears, with a
servo-operated multiple disc clutch
ZF 15MA (1.88:1 or 2.63:1)
ZF 10MA (1.79:1)
ZF 12MA (2.63:1)
ZF 15M IV (2.13:1 or 2.72:1)
ATF- Type A or Dextran - II or Ill
Right-hand rotation for above models
listed.