Westerbeke 12C- TWO User Manual

HURTH HBW/ZF TRANSMISSION TROUBLESHOOTING
CONTROL CABLES
The majority of transmission difficulties arise as a result of
improper
clutch adjustments (manual transmissions) or
'problems with control cables (hydraulic transmissions)
rather than from problems with the ·transmission itself.
A new cable and perhaps a new linkage mechanism may be
, needed. While the cable is loose, shift the transmission in and
out of gear
using the lever on the side of the transmission to
make sure there's no binding inside the case.
HURTHIZF clutches, in particular, are very sensitive to
improper cable adjustments.
If the transmission passes these tests, crank the engine and
have a helper put it in forward and reverse while you observe
the propeller shaft; if the shaft isn't turning, the transmission
needs professionaI attention. If it does tum but there's no
thrnst, check to see you still have a propeller on the end of
the shaft or, if you have a folding or feathering propeller,
If you experience operating problems with the transmission,
shut the engine down. First check the transmission.fluid
level,
then have a helper move the cockpit shift lever througb
the full
range - from neutral to full forward, back to
neutral, into full reverse, and back to neutral- while you
observe the actuating lever on the transmission. If the remote
is stiff to operate, break the cable loose at the transmission
and try
again. If it is still stiff, check the cable for kinks or
excessively tight bends, and check any linkage for binding.
that it isn't stuck
in the "no pitch" position.
Problem
Transmission gears c~nnot be shifted.
Fails to move into gear.
Transmission shifts into gear,
but fails to propel the boat.
Delay of gear engagement or engages
only after an' increase in speed.
Transmission noise becomes louder.
Ch-attering transmission noise,
mainly at low engine speed.
Boat fails to attain specified max, speed.
Oil leakage.
Probable Cause
NOTE: If you suspect a major problem in your transmission,
immediately contact your
WESTERBEKE dealer or an
authorized marine transmissioll[acility.
Ve,ilicatlon/Remedy
1.
Actuating lever is loose.
1. Tighten damping bolt on shifting lever.
2.
Shifting cable Is broken, bent or
2. Check the cable, reattach or replace.
unattached. Cable radius is too severe.
3.
Shift lever Is binding against cover plate.
3. Detaoh the shift cable and operate the lever by hand.
.
Clearance should be 0.02 in (0.5mm) .
.
1.
Output coupling Is not turning.
1.
Transmission needs professional attention.
2.
Propeller shaft is not turning.
2. The coupling bolls are sheared or the coupling is slipping
Output coupling is turning. on the propeller Shaft. Tighten or replace set screws, keys,
pins and coupling bolts as necessary.
3. Output coupling and 3. Inspect the propeller. It may be missing or damaged.
propeller shaft are turning. A folding propeller may be jammed. A variable pitch
propeller may be in "no pitch" position:
1. Lever travel N to B not equal to N to A. 1. Adjust cover plate until the lever is exact mid-position.
Refer to diagram. Refer to SHIFT LEVER TEXT AND DIAGRAM.
2.
Shift level travel in insufficient.
2. Check shift lever cable length. See SHIFT LEVER DIAGRAM.
3.
Shift lever Is binding against cover plate.
3.
Check clearance, adjust if necessary.
1.
Damage starting on flexible coupling due
1.
Check angnment, inspect flexible coupling. If noise perSiSts,
to wear or fatigue, possibly due to inspect the damper plate between the transmission and the
misalignment between engine and engine. Replace if necessary.
drlveshaft.
2.
Beginning damage of bearings in
2.
Transmission needs professional attention.
transmission due to torsional Vibrations,
running without fluid, overload, wrong
. alignment of transmiSSion, or excessive
engine output
1. The engine or propeller generates torsional 1. Mount a flexible coupling with another stiftness factor
vibratIons in the drive unit which produces between the transmissIon coupling with and the driveshaft.
a "chattering" noise in the transmission. A higher stiffness factor might be suHiclent.
2. Inspect the damper plate between the engine and the
transmission. Replace if necessary.
1. Operating temperature is high. 1. Wrong type of flUid. Use ATF. Check fluid level.
2.
Operating without cooling.
2.
Check cooler, Inspect coolant hoses and coolant flow_
1.
Corrosion at radial sealing ring and shaft. 1. Transmission needs professional attention.
Damag~d sealing ring.
2. MisaQgnment of output flanges. 2. Check 'lignment. Must be within 0.003 in (O.OBmrri).
NOTE: [[you suspect a major problem in your transmission,
immediately contact your WESTERBEKE dealer or an
authorized marine
transmission facility. ~ WESTERBEKE
Engines & Generators
49

Westerbeke 12C- TWO Specifications

General

Brand	Westerbeke
Model	12C- TWO
Category	Engine
Language	English