WORKSHOP MANUAL
MP 84/98 - MP 84/98 Hy
3. Maintenance
This chapter covers the main aspects of a servi c
ing procedure.
A specic chapter is dedicated to a quick trouble
shooting guide on the most frequent questions
and the chapter references providing information
on the interventions required to resolve the same.
4. Adjustments and tuning
his chapter deals with the adjustments to be ma de
to remedy the more frequent performance fai lures
and are usually resolved by quick checks and tun
ings.
5. Removal of external parts and main assem-
blies
For doing more dicult jobs, greater accessibility
may be required. This can be done by taking the
unit concerned o and working at the bench, or by
removing the cover or other external parts.
Whether or not this will be useful is at the discre
tion of the mechanic’s experience.
6. Repairs
This chapter deals with all the more complex work
connected with the replacement or repair of mal
functioning or worn parts.
The descriptions must follow a logical sequence
and can include operations not specically con
nected to a particular type of repair.
In this case, careful reading of the entire procedure
can help you omit all those operations not connect
ed with the case in hand without, however, over
looking anything that may be necessary.
7. Electrical system
This chapter deals with the problems and checks
con nect ed with the electrical system.
All work can be done using a tester without ha ving
to use special equipment.
The electrical diagrams can be useful to you for
B) Identication and number of the page based on
the following criteria:
– the rst eld indicates the section and chapter;
– the second eld indicates the revision index;
– the third eld indicates the chapter validity start
date, i.e. the year of manufacture of the ma-
chine;
– the fourth eld indicates the page number and
total number of pages dedicated to the subject.
C) Chapter title.
D) General information, references to other chapters
in the manual, technical information related to the
topic, and buttons with links to the machine oper-
ating units map can be found in the left column on
each initial page.
SECTIONS OF THE MANUAL
The content of the manual is divided into sections
which correspond to the various subjects and the dif-
ferent types of servicing.
1. Rules and procedures for Service Centres
This chapter covers all the main aspects of the re
lationship between the manufacturer and the ser
vice centres.
A close collaboration between the manufacturer
and the service centres is conclusive for solv
ing problems in the most eective way as well as
maintaining an image of eciency and reliability.
Compliance with these brief and simple guide
lines will facilitate this task and prevent general
mi sunderstandings and timewasting for both the
manufacturer and the service centre.
2. General regulations
This chapter covers the main aspects of a servi
c ing procedure and the general rules for guaran
teeing a successful service which protects the
en vironment and respects the safety of both the
ser viceman and the user of the apparatus.
GENERAL INFORMATIONS
The purpose of this manual is to assist Service Cen-
tres with service, disassemble and repair the versions
of the machines:
– mechanical driven (MP 84/98);
– hydrostatic driven (MP 84/98 Hy).
The manual has left out the simplest and quickest
operations that can be handled by a good mechanic,
while concentrating more on specic aspects with
tips and advice on the best servicing procedures.
Please take time to read through this manual to ac-
quire a basic understanding of the machine, which is
necessary for working rationally without making er-
rors or wasting time.
All problems related to the use of the machine are
fully covered in the User manual.
STRUCTURE OF THE MANUAL
The manual is divided into sections and chapters.
Each page of this manual states the following infor-
mation:
A) Machines or series of machines to which the con-
tents of the chapter are applicable.
CHAPTER REVISION FROM ... PAGE
i 1 2018 1 of 2
HOW TO USE THE MANUAL
WORKSHOP MANUAL
Map of functional units
MP 84/98 - MP 84/98 Hy
Disconnect the connectors (3) from the clutch con-
tacts (2), unhook the return spring (4) from the clutch
side and unscrew the central screw (5) with the help
of a power screwdriver.
Remove the clutch (2) from the engine shaft, together
with the transmission command pulley (6) and the
spacer (7 - if installed).
IMPORTANT To remove
the clutch (2) from the en-
gine shaft, absolutely do
not use a lever to force
the pulleys or the outer
cover. In case of diculty,
apply an unlocking spray
and gently tap on the hub
with a hammer, to facili-
tate extraction.
Remove the exhaust guard (8).
Disconnect the accelerator cable control and the
e lectrical cables.
Remove the front hood.
For greater operating convenience it is recommended
that the transmission belt is slackened o; this is done
by enga ging the parking brake.
FIRST disconnect the black earth cable from
the bat tery, and THEN the red cable, to prevent pos-
sible short circuits and dangerous situations.
Free the blade belt (1) from the clutch pulley (2).
REMOVAL OF THE ENGINE
CHAPTER REVISION FROM ...
5.5 2 2018
General informations
Since there are dierent types of drive, the stag-
es de scribed here refer to those shared or similar
in all types of engine.
Related topics
[
5.1] Removal of front hood
[
6.8] Replacement of the accelerator and ad-
justment of the carburettor
Tightening torques
5 Screw for pulley ............................. 45 ÷ 50 Nm
- Screws for engine fastening ............ 25 ÷ 30 Nm
3
2
7
6
1
2
4
5
A C B
D
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