Westerbeke W-70GA Manual de Instalação descarregar pdf (Página 47)

TRANSMISSION

TROUBLESHOOTING

[ZF]

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.

ZF

clutches,

in

particular,

are

very

sensitive

to

improper

cable

adjustments.

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

through

the

fuII

range

-

from

neutral

to

full

forward,

back

to

neutral,

into

fuIl

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.

Problem

Probable

Cause

Transmission

gears

cannot

be

shifted.

1.

Actuating

lever

is

loose.

Fails

to

move

into

gear.

2.

Shifting

cable

is

broken,

bent

or

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.

If

the

transmission

passes

these

tests,

crank

the

engine

and

have

a helper put it

in

forward

and

reverse

while

you

observe

the

propeIIer

shaft;

if

the

shaft isn't

turning,

the

transmission

needs

professional

attention.

If it

does

tum

but

there's

no

thrust,

check

to

see

you

still

have

a propeller

on

the

end

of

the

shaft

or,

if

you

have

a

folding

or

feathering

propeller,

that

it isn't

stuck

in

the

"no

pitch"

position.

NOTE:

If

you

suspect a major

problem

in

your

transmission,

immediately contact your

WESTERBEKE

dealer

or

an

authorized

marine

transmission

facility.

Verification/Remedy

1.

Tighten

damping

bolt

on

shifting

lever.

2.

Check

the

cable,

reattach

or

replace.

unattached.

Cable

radius

is

too

severe.

3.

Actuating

lever

is

binding

against

the

3.

Detach

the

shift

cable

and

operate

the

actuating

lever

by

hand.

Clearance

should

be

0.02

in

(0.5mm).

Transmission

shifts

into

gear,

1.

Output

coupling

is

not

turning.

1.

Transmission

needs

professional

attention.

but

fails

to

propel

the

boat.

2.

Propeller

shaft

is

not

tuming.

2.

The

coupling

bolts

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.

Delay

of

gear

engagement

or

engages

1.

Actuating

lever

travel

N

to

B

not

1.

Adjust

cover

plate

until

the

lever

is

exact

mid-position.

only

after

an

increase

in

speed.

equal

to

N

to

A.

See

ACTUATING

LEVER

TEXT

AND

DIAGRAM.

2.

Actuating

level

travel

in

insufficient.

2.

Check

shift

lever

cable

length.

See

ACTUATING

LEVER

DIAGRAM.

3.

Actuating

lever

is

binding

against

cover

plate.

3.

Check

clearance,

adjust

if

necessary.

Transmission

noise

becomes

louder.

1.

Damage

starting

on

flexible

coupling

due

1.

Check

alignment,

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.

transmission.

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.

Chattering

transmission

noise,

1.

The

engine

or

propeller

generates

torsional

1.

Mount

a

flexible

coupling

with

another

stiffness

factor

mainly

at

low

engine

speed.

vibrations

in

the

drive

unit

which

produces

between

the

engine

and

transmission;

a

coupling

with

a

"chattering"

noise

in

the

transmission.

a

higher

stiffness

factor

might

be

sufficient.

2.

Inspect

the

damper

plate

between

the

engine

and

the

transmission.

Replace

if

necessary.

Boat

fails

to

attain

specified

max.

speed.

1.

Operating

temperature

is

high.

1.

Wrong

type

of

fluid.

Use

Dextron

III,

check

fluid

level.

2.

Operating

without

cooling.

2.

Check

cooler.

Inspect

coolant

hoses

and

coolant

flow.

Oil

Leakage.

1.

Corrosion

at

radial

sealing

ring

and

shaft.

1.

Transmission

needs

professional

attention.

Damaged

sealing

ring.

2.

Misalignment

of

output

flanges.

2.

Check

alignment.

Must

be

within

0.003

in

(0.08mm).

Engines & Generators

41

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