Global Garden Products Lawn Mower 98S 98S Hydro Instructions Manual

							© by GLOBAL GARDEN PRODUCTS
98S
4.1.0
BLADE ENGAGEMENT ADJUSTMENT





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4.1 BLADE ENGAGEMENT ADJUSTMENT
The blades are run from the engine using a “V”
belt and are engaged by a stretcher worked from
the lever.
After a certain amount of use the belt and the
cable can become longer which can result in mal-
functioning, i.e.:
–belt slipping = belt or cable stretched
–difficulty in disengaging, with a stiff lever and
the blades continuing to run = belt shortened
In both cases the stretcher needs to be adjusted.
With the cutting deck in its lowest position, look for
the adjuster 
(1)which can be reached from the
wheel arch of the right-hand rear wheel. Turn the
nuts until the spring 
(2)reaches the length 94 ÷ 96
mm, measured from the outer edge of the eye-rings
with the blades engaged.
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2
94 ÷ 96 mm1 
						

							4.2 BLADES BRAKE ADJUSTMENT
Disengaging the blades causes a double brake to
come into action. This is to stop the blades turn-
ing within five seconds.
Longer braking times do not comply with safety
regulations, but adjusting the brake so that it
stops quicker than this can cause the belt to slip
on the shoes resulting in overheating with the typ-
ical smell of burnt rubber.
Take off both the right-hand protective cover (1)and
left-hand one 
(2)secured by the screws (3).
Disengage the blades and check that the two shoes
(4)and (5)press on the belt (6)without interfering
with the respective pulleys.
With the blades disengaged, check the length of the
spring 
(7)that determines the braking power on the
right-hand blade. Adjust the nuts
(8)until the spring
is 129 ÷ 131 mm long, measured from the outer
ends of the spring.
Next, check the length of the spring 
(9)that deter-
mines the braking power on the left-hand blade.
Adjust the nuts 
(10)until the spring is 32 ÷ 34 mm
long, measured from the outer ends of the spring. 
7
129 ÷ 131 mm
8
9
32 ÷ 34 mm
8
10
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5
4
6
6
33
2
1
33
98S
4.2.0
BLADES BRAKE ADJUSTMENT





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							4.3 BRAKE ADJUSTMENT
Reduced braking power is corrected by adjusting
the spring on the brake rod.
➤In mechanical drive models:

Remove the fuel tank [see 5.3].
➤In the hydrostatic drive models: 
Use a socket spanner to make the adjustment
through the hole 
(1) on the rear plate.
The adjustment is to be made with the parking
brake engaged and consists of altering the length of
the spring 
(2)to the best measurement. The braking
capacity is increased by screwing the nut down on
the rod (and thus shortening the length of the
spring).
Loosen the nut (4) which retains the bracket 
(5)and
then turn the nut 
(6)so that the length «A»of the
spring 
(2)is:
–43,5 ÷ 45,5 mm➤In mechanical drive
models
–45 ÷ 47 mm➤In hydrostatic drive models 
measured from the inside of the washers. When the
adjustment has been made, tighten the nut 
(4).
Never go under these amounts to avoid overloading
the brake unit.
When the adjustments have been made, the park-
ing brake should prevent the lawn-tractor from
moving on a slope of 30% (16°) with the driver in
position.
➤In mechanical drive models:
If braking is still poor or uneven even after having
made the adjustment, remove the control rod 
(3)
from the lever (7)and check that this lever has a
free movement of 20 mm (measured vertically
next to the pin rod) before beginning the braking
action. If this is not the case, the free movement
can be adjusted with the screw 
(8), unless the87
20
mm
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37
A
4632
5
1
98S
4.3.0
BRAKE ADJUSTMENT





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							3/2002
brake pads or discs are so worn that they need replacing [see 6.11].
When connecting the rod 
(3)be sure to use the uppermost hole in the lever (7)and then check the length of
the spring again 
(2).
➤In the hydrostatic drive models: 
If braking is still poor or unsteady even after making the adjustment, you cannot make any further adjust-
ments from the outside. Therefore you need to dismantle the whole rear axle of the machine [see 5.5] and
contact one of the manufacturer’s Service Centres.
When assembly is completed …
➤In mechanical drive models:

Refit the fuel tank [see 5.3].
98S
4.3.0
BRAKE ADJUSTMENT





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							© by GLOBAL GARDEN PRODUCTS
98S
4.4.0
DRIVE BELT ADJUSTMENT





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4.4 DRIVE BELT ADJUSTMENT
If it seems that the forward drive is not working
properly after a long period of use or after replac-
ing the belt, this may be caused by a change in the
length of the belt.
–A loose belt reduces output from the transmis-
sion and limits forward movement power;
–a belt which is too tight increases noise and
results in jerky movements or tipping up when
engaging the drive.
In these cases the stretcher will need to be adjust-
ed.
The stretcherg can be accessed from the front
hood. Adjust the tension of the spring 
(1)by turning
the nuts 
(2)until achieving length «A»of:
–119 ÷ 121 mm➤In mechanical drive models
–120 ÷ 122 mm➤In hydrostatic drive models
measured from the outer ends of the springs with
the drive commands disengaged.
When the adjustment has been made, tighten the
nuts 
(2).
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A
2
1 
						

							4.5 DRIVE PEDAL ADJUSTMENT  (➤Hydrosta-
tic drive models) 
This operation should be carried out every time
the rear axle, the pedal or the control rod is
removed in order to get the correct travel for the
pedal and to enable reaching the envisaged
speeds both forwards and in reverse.
A) Adjusting the pedal in the “neutral” position
The pedal (1)is in the ideal position when the lever
(2)of the hydrostatic unit is in “neutral” and the
lower rubber edge 
(3)on the reverse side is 24 – 26
mm from the footboard.
The pedal position must be adjusted with reference
to the neutral position 
«N»of the hydrostatic unit
lever 
(2); this position is reached when this lever is
perfectly vertical with a tolerance of ± 1mm (± 0.8°).
Make the adjustment through of the rear plate using
the nuts 
(4)of the control rod (5)until the pedal is
positioned properly. Take care not to accidently
change the position of the lever 
(2)during the
adjustment.
B) Adjusting the “neutral” position of the micro-
switch
IMPORTANT! - This is a very important adjust-
ment for the operation of the safety devices
regarding permitting starting and stopping of
the lawn-tractor during work.
The neutral position «N»is signalled by the
microswitch 
(6)of the cam (7).
After checking that the adjustment 
«A»has been
correctly made, make sure that the pedal is
released and in neutral 
«N»then loosen the locknuts
(8)of the microswitch and position it in line with the tip
of the cam.
After making the adjustments, move the pedal 
(1) from
the neutral position 
«N»to the forward and reverse
gear positions: you should hear the click of the button
at each gear change before the wheels start moving.
68
74
5
2
N
2
5
90°
1
N
F
R24 - 26 mm
3
4/2005
98S
4.5.1
DRIVE PEDAL ADJUSTMENT





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							4.6 ALIGNING THE CUTTING DECK 
The cutting deck is lowered by a level controlled
cable, and is moved by two trace rods at the front
and back.
In order to get a good cut it is essential that the
cutting deck is parallel with the ground crosswise,
and slightly lower at the front.
Three adjustments can be made on the jointed
system of the cutting deck:
a)a combined adjustment to the parallel and the
minimum height front and back
b)an adjustment to just the parallel across the
cutting deck
c)adjusting the regularity of raising and lowering
Check the tyre pressures. If one or more tyres have
been replaced and there are found to be differences
in diameter, 
do not attempt to compensate these
differences by giving different tyre pressures
,
but make the adjustments as in points 
“A”and “B”.
A) The combined adjustment to the parallel and
the minimum height front and back
Put the lawn-tractor onto a flat and stable surface
(such as a work bench) and put blocks beneath the
cutting deck in line with the centre lines of the
blades:
–at the front  26 mm 
(1)# code 60700000/0
–at the rear  32 mm 
(2)# code 60700001/0
Put the height lever in position «1» and completely
loosen the adjuster 
(3), the nuts (4 - 6 - 8)and the
locknuts 
(5 - 7 - 9)of the three trace rods until the
deck is resting on the blocks.
Turn the two right-hand upper nuts 
(6 - 8)and the
left-hand lower nut 
(4)to the point where the deck
just begins to lift.
Tighten the three locknuts 
(5 - 7 - 9)and turn the
adjuster 
(3)until the control cable is taut.
Check that the deck rises and lowers regularly as
indicated in point “
C”.
B) Adjusting the parallel across the cutting deck
Any difference in height from the ground between
the left and right sides of the deck can be compen-
sated by turning the two nuts
(4 - 8)and locknuts (5
- 9) of just the back rods
.
11
10
10
7
6
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5
4
39
8
12
1 - h = 26 mm
2 - h = 32 mm
98S
4.6.0
ALIGNING THE CUTTING DECK 





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							3/2002
C) Adjusting the regularity of raising and lowering
When the adjustment as at point “A” has been made, put the control lever in 2 or 3 different positions and
check that the deck rises evenly and that at each position it constantly maintains the difference in height from
the ground between the front and back edges.
If the front part tends to rise faster or slower it can be adjusted by turning the nuts 
(10)on the link rod (11).
Turning the nuts clockwise will lift the front part and make it rise faster, and turning anti-clockwise will give the
opposite effect.
The right distance between the two centres is 356 ÷ 357.5 mm, which will give an even rise and descent [see
8.2.9].
Remember to tighten all the nuts and locknuts once these adjustments have been made.
98S
4.6.0
ALIGNING THE CUTTING DECK





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							4.7 STEERING ALLOWANCE ADJUSTMENT
The steering allowance should never be excessive
if driving is not to be impaired.
Check that the movement is not caused by loose
linkage nuts and tighten all the nuts of the tie-rods
and ball joints.
If the movement is due to the ring gear / pinion cou-
pling, it will be necessary to adjust the arrangement
of the set of blocks between the ring gear and the
frame.

 Remove the fuel tank [see 5.3].
To facilitate access to the parts concerned, it is best
to loosen the drive belt.
This is done by ...
➤In mechanical drive models:  engaging the
parking brake 
➤In hydrostatic drive models:  loosening the
nut 
(1) of the stretcher. 
Release the spring 
(2)and lift the steering column
(3) enough to be able to draw out the pinion(4).
Unscrew the nut 
(5)and take out the whole ring
gear shaft
(6)without dismantling the tie-rod (7).
Take away one or both of the blocks
(8)under the
ring gear depending on the amount of free play to
be reduced.
Reassemble the pinion and the ring gear shaft, lin-
ing up the two reference points ( 
➜- ) punched
on them, and making sure that the notch 
(9)on the
frame slots into one of the housings in the bush. Put
the whole assembly back together and fully tighten
the nut 
(5). If the movement is still there after having
removed all the spacers, check and, if necessary,
replace the ring gear  / pinion unit [see 6.3], or look
for other possible causes.
➤In hydrostatic drive models:   tighten the spring
of the stretcher [see 4.4].
If only the front nut 
(1)has been loosened without
having touched the rear one, the right tension will
be achieved by just tightening up the nut 
(1).25
9
8
6
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4
6
7
2
5
1
98S
4.7.0
STEERING ALLOWANCE ADJUSTMENT





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							3/2002
When assembly is completed …

Refit the fuel tank [ see 5.3].
Tightening torque
5Nut for ring gear  ............................. 45 ÷ 50 Nm
98S
4.7.0
STEERING ALLOWANCE ADJUSTMENT





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