Operating Manual ZF/ZFE 25 A - ZF/ZFE 85 IV
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List of recommended fluids
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The Customer/Operator is responsi
ble to perform the necessary safety
checks to ensure that lubrication, cool
ing, maintenance and recommended
practices are strictly followed for safe,
All Transmission units are covered by
a guarantee. Therefore: In respect to
the handling of the transmission units
the instructions stated in this manual
are to be strictly followed.
The manufacturer is not liable for
any damages or losses caused by
faulty installation, wrong handling
of the equipment and/or deficient
The Customer has to make sure,
that any external forces, as well
as vibration caused by torsion and
The interaction between engine,
shaft and propeller may lead to
torsional vibration, producing a
hammering noise of gears and
might damage the engine and/or
The Supplier is not liable for such
torsional vibration inherent to the
This manual includes, among others,
the following three main chapters:
This part briefly describes function,
operation and design of the ZF/ZFE
This part describes the procedures for
Operation and all necessary safety
This part contains all maintenance and
service tasks to be performed by the
Whenever the terms «right, left, star
board, port» are used in this manual,
they always refer to the installed
transmission in direction of forward
Important information related to tech
nical reliability and operational safety
are highlighted by the identifying words
Any procedure, practice, condition,
statement etc., which is not strictly
followed, could result in injury or
Any procedure, practice, condition,
statement etc., which is not strictly
followed, could result in damage or
destruction of equipment.
Applies to technical require
ment to which the user of the equip
ment must pay particular attention.
always precede the text to which they
The identification plate is affixed to the
An example of an identification plate
Transmission ratio propeller rota
tion opposite to a engine rotation.
Transmission Serial Number.
Every year a new progressive letter
Transmission part number.
Transmission ratio propeller rota
tion same as engine rotation.
Significance of transmission designa
Nominal transmission ratio
Position the control lever (refer to the rela
tive figures for the various models):
Electric valves pos. «A» and «B» corre
spond to shifting lever «A» and «B» pos.
The ZF / ZFE A/H/IV marine trans
mission is a hydraulically activated
helical gear unit, developed for use in
commercial and pleasurecraft and de
signed as a three shaft type gearbox.
(Four shafts design for IV type).
The transmission is provided with a
disc-type reversing clutch mounted
on the input shaft and supplied with
hydraulic pressure from a fluid pump.
Operation of the fluid pump is depend
ent on the engine speed; the pump is
integrated in the control block.
The transmission is lubricated by
splash and force-feed lubrication.
A head, astern, clutch disengagement
are operated electrically by ON/OFF
Electronic control block includes «get
A simple mechanical device permits
manual engagement of the clutch.
Connecting thread for temperature
Connection for shifting pressure
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