Global Garden Products Lawn Mower 72 72 Hydro Instructions Manual

							4.6 ALIGNING THE CUTTING DECK
The cutting deck is lowered by a lever and is guid-
ed by a connecting rod at the front and one at the
back right. A third connecting rod at the front left
is connected to the deck by an adjuster system.
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.
Two adjustments can be made on the jointed sys-
tem of the cutting deck:
a)a combined adjustment to the parallel and the
minimum height front and back
b)an adjustment to the parallel across the cutting
deck alone
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 machine onto a flat and stable surface (such
as a work bench) and put blocks beneath the cut-
ting deck:
–at the front 26 mm 
(1)# code 60700000/0
–at the rear 32 mm 
(2)# code 60700001/0
Put the cutting height adjustment lever into the
notch at position «1» and loosen the nuts 
(3 – 5 – 7)
and the locknuts (4 – 6 – 8)so that the deck rests
firmly on the blocks.
Screw down the nut 
(3)until the front part of the
cutting deck starts to rise, then tighten the relevant
locknut 
(4)in order to create a fixed reference point
for the following stages.
Turn the nut 
(5)so that it presses on the pin (9)and
causes the rod 
(10)to move forward until all free
movement is eliminated and the front right of the
deck begins to rise.
8
7
109
56
4
3
21
3/2002
72
4.6.0
ALIGNING THE CUTTING DECK





1 / 2
WORKSHOP MANUAL
page from 
1998to  ••••
© by GLOBAL GARDEN PRODUCTS 
						

							Having checked that the rod has no possibility of longitudinal movement, tighten the locknut (6).
Screw down the nut 
(7)of the transverse adjuster until the front left begins to rise, and then tighten the lock-
nut 
(8).
B) Adjusting the parallel across the cutting deck alone
Any difference in height from the ground between the left and right sides of the deck can be compensated by
turning the nut 
(7)and the locknut (8)at the front left coupling point.
NOTE
Remember to tighten all the nuts and locknuts once these adjustments have been made, leaving the neces-
sary free rotation movement to the pins [see 2.6.B].
3/2002
72
4.6.0
ALIGNING THE CUTTING DECK





2 / 2
WORKSHOP MANUAL
page from 
1998to  ••••
© by GLOBAL GARDEN PRODUCTS 
						

							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 in the pinion to ring gear cou-
pling, the height of the ring gear will need to be
adjusted by inserting spacers inside the hub.

 Remove the front and rear protection cover of
the steering column [see 5.1].

 Remove the footboard [see 5.2]. 
Unhook the spring 
(1)and lift the steering column
(2)far enough to be able to take out the pin (3)and
the pinion 
(4).
Undo the screw 
(5)and take out the ring gear (6).
Put one or two 11 x 17 x 0.5 mm spacers 
(7)code
12520031/0 (according to requirements) inside the
hub so that the ring gear is raised higher than the
pinion.
Line up the front wheels and refit the ring gear 
(6)
with the arrow pointing forwards, then fully tighten
the screw 
(5).
Turn the steering column so that the hole of the pin
(3)is at right angles to the longitudinal axis of the
machine, and then fit the pinion 
(4) so that the pin is
fully inserted in its seat.
Push the end of the steering column 
(2) right down
in the hole of the bush 
(8), check that the teeth of
the ring gear in the new position are correctly
meshed with those of the pinion and finally, refit the
washer 
(9)and the spring (1).
If the movement is still there after having removed
all the spacers, check it and if necessary, replace
the ring gear/pinion unit [see 6.3], or look for other
possible causes.
7
6
5764
8
91
2
4653
8
9
1
3/2002
72
4.7.0
STEERING ALLOWANCE ADJUSTMENT





1 / 2
WORKSHOP MANUAL
page from 
1998to  ••••
© by GLOBAL GARDEN PRODUCTS 
						

							When all parts have been fitted, ...

 Fit the footboard  [see 5.2].

 Fit the front and rear protection covers for the steering column and the footboard [see 5.1].
Tightening torque
5Ring gear fixing screw  .................... 25 ÷ 30 Nm
3/2002
72
4.7.0
STEERING ALLOWANCE ADJUSTMENT





2 / 2
WORKSHOP MANUAL
page from 
1998to  ••••
© by GLOBAL GARDEN PRODUCTS 
						

							4.8 STEERING GEOMETRY ADJUSTMENT
The correct steering geometry is given by the dis-
tances between centres of the two tie-rods con-
necting the wheels. Any faults caused by knocks
or accidents result in reduced driving precision
and increased wear on the tyres.
These can be overcome as follows:
–uneven or excessive wear on the front tyres =
toe-in adjustment,
–the machine does not maintain a straight line
when the steering wheel is straight = adjust-
ment of tie-rods.
NOTE
Before any other action, check that the ball joint
connections have not become loose.
A) Toe-in adjustment
The exact toe-in is obtained when there is a dis-
tance of 429 - 431 mm measured between the two
centres of the stub axle joints 
(1)which is obtained
when the distance between the joints of the two tie-
rods 
(1 – 2)is 200.5 - 201.5 mm [see 8.2.3].
If the amount is different to this, check if the error is
due to one or both of the tie-rods. Dismantle the
part concerned, loosen the locknut 
(3)and screw
the joint up or down on the rod 
(4) until achieving
the exact amount.
NOTE
The two tie-rods must always be adjusted to the
same length.
On fitting, fully tighten the locknuts 
(3)and the nuts
(5)fastening the joints.
B) Adjusting the steering wheel position
Firstly check the toe-in (point “A”) and align the
front wheels.
If the steering wheel is not straight, check that both
tie-rods have the same distance between the joints
(1 – 2) (200.5 - 201.5 mm) [see 8.2.6].
Having identified the part that has a different length,
adjust as indicated in point «A».On fitting, fully tighten the locknuts 
(3)and the nuts (5)
fastening the joints.
When the adjustment has been made, check the toe-in
as described at point ”
A”.
Tightening torques
3Locknuts for articulated joints .......... 25 ÷ 30 Nm
5Fastening nuts for articulated joints.  45 ÷ 50 Nm
4
3
1
5
1
429 - 431 mm
200,5 - 201,5
mm
221
3/2002
72
4.8.0
STEERING GEOMETRY ADJUSTMENT





1 / 1
WORKSHOP MANUAL
page from 
1998to  ••••
© by GLOBAL GARDEN PRODUCTS 
						

							© by GLOBAL GARDEN PRODUCTS
72
4.9.0
CHECK ON BLADE ALIGNMENT





1 / 1
WORKSHOP MANUAL
page from 
1998to  ••••
3/2002
4.9 CHECK ON BLADE ALIGNMENT
Excessive vibration when cutting and an uneven
cut can be due to misalignment of the blade
owing to deformation of the flange or the shaft as
a result of accidental knocks.

Place the machine on its side [see 2.4].
Always wear strong gloves when handling the
blade.
Disengage the blade, place a straight metal rod (1)
on a point around the edge of the deck (2), turn the
blade by hand and check the distance between the
rod and the two ends “
A” and “B”. The distance
should be the same, and any difference should not
exceed 2 - 3 mm.
If higher amounts are found, check that the blade is
not distorted. If this is not the case, check the sup-
port or the shaft for the blade [see 6.6], replacing if
necessary, and check the condition of the point
where the flange rests on the cutting deck.
IMPORTANT!
Always replace a damaged blade and do not
attempt to repair or straighten it. Always use
manufacturer’s genuine spare parts!
1
A
B
2
12 
						

							4.10 SHARPENING AND BALANCING OF THE
BLADE
A badly sharpened blade causes grass to
become yellow and reduces grass collection
capability. If not balanced, excessive vibration
can be caused during use.
Always wear protective gloves when handling
the blade and protect eyes when sharpening.
For removing a blade it must be firmly held and the
central screw 
(1)undone.
A) Sharpening
Always sharpen both cutting edges of the blade (2)
using a medium grade grinder. Sharpening must
only be done from the rounded side, removing as
little as possible.
The blade is to be replaced when the cutting edge
has worn down to 10 mm.
B) Balancing
Using the appropriate equipment, check the bal-
ance to make sure that there is a maximum differ-
ence of 1 gram between one side and the other.
When refitting, make sure that the key 
(3)is correct-
ly positioned on the shaft, that the wings are turned
towards the inside of the deck and that the cupped
part of the flexible washer 
(4)is pressing against the
blade.
Tightening torque
1Screw for blade  .............................. 45 ÷ 50 Nm
2
4
1
3
4
1
2
2
max 10 mm
1
3/2003
72
4.10.1
SHARPENING AND BALANCING OF THE BLADE





1 / 1
WORKSHOP MANUAL
page from 
1998to  ••••
© by GLOBAL GARDEN PRODUCTS 
						

							© by GLOBAL GARDEN PRODUCTS
72
4.11.1
ADJUSTMENT OF THE COLLECTOR CHANNEL GUIDE





1 / 1
WORKSHOP MANUAL
page from 
1999to  ••••
4/2005
4.11 ADJUSTMENT OF THE COLLECTOR
CHANNEL GUIDE
This adjustment is to be made after any work on
the collector channel guide and if the rear plate
has been dismantled.
The importance of this adjustment is in avoiding
that incorrectly inserting the channel opening in
the hole in the plate prevents the wheels cover
[see 2.5] from closing properly which could let
grass cuttings get into the engine housing causing
damage.

 Fit the channel [see 5.5]. 
Take the cutting deck to position «1». In this condi-
tion, the channel 
(1)should be properly sitting in the
guide 
(2).
If the guide is lower or tends to raise the channel
too much, loosen the screw 
(3)and make the guide
slide until it is repositioned correctly.
Always check that, when the wheels cover is closed
according to the regular procedure [see 2.5], the
channel always inserts in the hole of the plate regu-
larly and automatically, and with no need to help it
in manually.
30 mm32
~ 3 mm
12
3 
						

							© by GLOBAL GARDEN PRODUCTS
72
5.1.1- REMOVAL OF THE STEERING COLUMN
PROTECTION COVER




1 / 1
WORKSHOP MANUAL
page from 
1999to  ••••
4/2005
5.1 REMOVAL OF THE STEERING COLUMN
PROTECTION COVER
Removing the front protection cover of the steer-
ing column gives better access to:
–the battery
Remove the rear protection (1), held by two side
screws 
(2).
Dismantle the starter unit 
(3)and take out the signal
LED 
(4).
Dismantle the steering wheel 
(5)after having
removed the pin 
(6)using a punch.
Undo the two side screws 
(7). The front protection
cover 
(8)can be taken out from the top.
56
8
34
1
2
7
8 
						

							5.2 REMOVAL OF THE FOOTBOARD
Removing the footboard gives access to:
–the pinion and the ring gear of the steering.

Remove the steering column protection cover
[ see 5.1].
Dismantle the pedal 
(1) by unscrewing the two nuts
(2), and unscrew the knob (3)of the parking brake.
Unscrew the nut 
(4)to slightly lift the wheels cover
(5).
The footboard 
(6)is held to the frame by four inter-
nal screws 
(7)and four longer external screws (8)
with washers (9)for resting on the tubular support
element.
On refitting, reverse the order of the previous steps,
remembering to put the washers 
(9) under the
screws 
(7)and lastly, …

Refit the protection covers on the steering col-
umn [see 5.1].
Tightening torque
7-8Self-threading screws for the footboard6,5 Nm7
9
8
98
67
5
4
3
1
2
3/2002
72
5.2.0
REMOVAL OF THE FOOTBOARD





1 / 1
WORKSHOP MANUAL
page from 
1998to  ••••
© by GLOBAL GARDEN PRODUCTS