Stiga MP 84/98 - Page 21

WORKSHOP MANUAL
MP 84/98 - MP 84/98 Hy
Important informations
Characteristics of the original belts
The standard belts on the market have dierent
characteristics compared to the requirements of
the original spare belts, supplied by the authorised
dealer. The latter are designed and manufactured
in close cooperation with the belt supplier and the
machine manufacturer.
Here are the reasons why it is important to choose
an original belt, useful when making such deci
sions..
a) Adhesion on the pulley. The
belt rests with the sides inclined
against the walls of the pulley.
There must be a gap between the
belt and the bottom of the groove.
b) Floating pulley on cutting
equipment. The original Power
Take O (PTO) belt is designed to
work even if the pulleys move up
and down and tilt at the same time.
c) Curvature in two directions.
All the original belts, which work
with tensioning arms acting on the
external side, are equipped with re
inforcements. The reinforcement is designed spe
cically for these specic cases..
2. Transmission - Brakes - Wheels
Problem Probable cause Solution
The machine moves
slowly, looses power or
doesn't move at all
Slack belt Adjust [4.3]
Worn or oily belt Replace [6.4]
Broken pulleys Replace
[5.5]
[*]
The brake is not adjusted
correctly
Check and adjust [4.2]
Hydrostatic unit failure
1)
Check the Manufacturer's Instruction
Manual.
[*]
The machine will not
move in either direction
Pulley splines broken Replace [*]
Hydrostatic unit failure
1)
Check the Manufacturer's Instruction
Manual.
[*]
The machine does not
reach the foreseen
speed in forward drive
1)
Incorrect pedal adjustment
1)
Adjust [4.4]
Uncertain or ineective
braking
The brake is not adjusted
correctly
Check and adjust [4.2]
Hydrostatic unit over-
heating
1)
Insucient oil level
1)
Top up [*]
Clogged oil lter
1)
Clean and/or replace [*]
Abnormal noise and
vibrations
Slack or worn belt Check and/or replace [6.4]
Irregular fan rotation
Check the condition of the fan, that it is
securely fastened in place and that noth-
ing interferes with the rotation movement
[*]
Incorrect positioning of the by-
pass valve
1)
Check and adjust [*]
Loose bolts and screws
Check and tighten to the prescribed
values
[5.6]
[5.6a]
The machine moves in
neutral gear
1)
Incorrect micro-switch
adjustment
1)
Adjust [4.4]
Slack or worn linkage system
1)
Check and/or replace [4.4]
Pushing the machine by
hand is dicult
1)
By-pass partially enabled
1)
Check [*]
The parking brake does
not stop the machine on
a 30% slope
Incorrect brake adjustment Adjust [4.2]
Excessive clearance on
the front wheels
Worn bearings Replace [6.2]
1)
Hydrostatic drive models
[*] Check the transmission unit Manufacturer’s Instruction Manual.
CHAPTER REVISION FROM ... PAGE
3.2 0 2018 2 of 3
TROUBLESHOOTING AND REMEDIES