Global Garden Products Lawn Mower 72 72 Hydro Instructions Manual

							If it does not enter easily and correctly,

 Adjust the insertion [see 4.11].
Fully tighten the nut
(5), put the lever (6)in position «7» engaging it in the stop notch,and remove the blocks
(2). Then refit the lever knob(3)and the hatch(4).
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2.5.1
OPENING THE WHEEL COVER 





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WORKSHOP MANUAL
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							2.6 PRACTICAL HINTS
A) Fitting snap rings
One side of the “Benzing” snap rings (1)has a
rounded edge and the other a sharp edge.
For maximum grip the rounded part needs to be
facing towards the element to be held 
(2), with the
sharp edges on the outside.
B) Joint pivot pins
There are a large number of pivot pins, usually con-
nected to rods, that need to be able to move in var-
ious directions.
A typical situation has the pin 
(3) fixed by a self-
locking nut 
(4) with two anti-friction washers (5)in
between the pin 
(3)and the support element, and
between this and the nut (
4).
Since these are joints, the nut must never be tight-
ened completely but only so much that it can
ensure the free rotational movement of the pin on its
axis without, however, creating excessive free play
which could result in the parts concerned becoming
misaligned and failing to work correctly.
C) Crown fasteners
Some pin ends(6) are secured by crown fasteners
(7). During dismantling, these fasteners are always
damaged and lose their hold, 
so they should never
be reused
.
On assembly, make sure it is inserted in the right
direction and push the fastener 
(7)onto the pin
using a pipe or socket spanner 
(8)with the right
diameter, so that it can be fitted without deforming
the fastener “crown”.
A deformed fastener should always be replaced.
7
6
7
6
8
3
55
4
3
45
1
2
1
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2.6.1
PRACTICAL HINTS





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WORKSHOP MANUAL
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© by GLOBAL GARDEN PRODUCTS 
						

							3.1 CRITERIA FOR MAINTENANCE
The Instruction Handbook has a number of operations to be carried out by the Customer for a minimum of
basic maintenance, and other operations not always within his capacity.
For this reason the Service Centre should undertake to keep the machine in perfect working order in two
ways:
a)Tuning the machine whenever possible.
b)Proposing a regular maintenance programme to the Customer to be carried out at prearranged intervals
(for example, at the end of the summer or prior to a long period of inactivity).
a) Occasional tuning
–Check working order of safety devices and renew illegible or missing labels
–Check tyre pressures
–Clean air filter
–Check engine oil level
–Check for fuel leaks
–Align cutting deck
–Sharpen and balance the blade and check the condition of the hub
–Check for wear in the belts
–Check the blade brake and engagement
–Grease joint pins and bushes of front wheels
–Grease the bush of the drive lever 
( ➤ hydrostatic drive models)
–Check and tightening of engine screws
–Check all those items indicated in the engine booklet
b) Regular maintenance
–All work carried out in section a), plus:
–Check battery charge
–Check tension of belts
–Adjust drive engagement 
(➤ mechanical drive models)
–Adjust brake
–Adjust blade engagement
–Adjust blade brake
–Check steering allowance
–Check front bearings
–General lubrication
–Clean away grass cuttings and wash exterior
–Clean and wash inside cutting deck and collector channel
–Clean and wash grass-catcher
–Touching up of any damaged paint
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3.1.1
CRITERIA FOR MAINTENANCE





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WORKSHOP MANUAL
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							© by GLOBAL GARDEN PRODUCTS
4.1 BLADE ENGAGEMENT ADJUSTMENT
The blade is run from the engine using a «V» belt
and is engaged by a stretcher worked from the
lever.
After a certain amount of use the belt can become
longer which can result in malfunctioning, i.e.:
–belt slipping = belt stretched
–difficulty in disengaging, with a stiff lever and
the blade continuing to run = belt shortened
In both cases the stretcher needs to be adjusted.
The length of the spring(1) must be adjusted with
the blade engaged and the cutting deck in position
«1», because in other positions the length can vary
considerably.
Loosen the nuts 
(2)and screw or unscrew them on
the control rod
(3) in order to obtain a distance of
77-79 mm between the bracket 
(4)and the inside
of the washer 
(5).
When the adjustment has been made, screw the
nuts 
(2)back on.
When the blade engagement has been adjusted it is
always advisable to …

 Check that the blade brake is working correctly
[see 4.2].
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4.1.1
BLADE ENGAGEMENT ADJUSTMENT





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1
 77 - 79 mm
2
3
5
4 
						

							© by GLOBAL GARDEN PRODUCTS
72
4.2.1
BLADE BRAKE ADJUSTMENT





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4.2 BLADE BRAKE ADJUSTMENT
Disengaging the blade causes a brake to come
into action. This is to stop the blade turning 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 shoe resulting in overheating with the typi-
cal smell of burnt rubber.
The braking power on the blade belt is generated by
the spring 
(1)which catches the blade engagement
lever 
(2)after disengagement. In order to use all the
braking power, do not allow the lever to reach its
end of travel in relation to the guide shoe 
(3).
Check that the brake shoe 
(4)is not deformed.

Remove the steering column cover [see 5.1].
Disengage the blade and check that the lever 
(2)
and guide shoe(3)have a clearance of at least 7-8
mm.
If this is not so, adjust the nuts 
(5)on the tie-rod (6)
until you achieve this clearance.
After adjustment, disengage the blade; the brake
shoe 
(4)should press adequately against the belt
(7), stopping rotation within 5 seconds of disen-
gagement.
6
5
4
7
1
7-8 mm
2
3 
						

							4.3 BRAKE ADJUSTMENT
Reduced braking power is corrected by adjusting
the spring on the brake rod which can be reached
after having lifted the wheels cover.

Lift the wheels cover [see 2.5].
The adjustment is to be made with the parking
brake engaged and consists of altering the length of
the spring 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).
➤In mechanical drive models:
Loosen the nut (1)which retains the bracket (2)
and then turn the nut (3)until the spring (4)is 46 -
48 mm long, measured from the inside of the
washers.
When the adjustment has been made, tighten the
nut 
(1).
Never go under these amounts to avoid over-
loading the brake unit.
If braking is still poor or uneven even after having
made the adjustment, uncouple the pin
(7)of the
control rod 
(8)from the lever(5)uncouple the
control rod 
(8 )pin (7)or from the lever (5)while
the pedal is fully released, and then check that
this lever has a free movement of 12 mm before
beginning the braking action.
If this is not the case, it is possible to adjust the
free movement at the nut 
(6), unless the brake
pads or disc are so worn that they need replacing
[see 6.8].
Refit the pin 
(7)with the control rod (8)and fully
tighten the nut 
(9); then recheck the length of the
spring 
(4).
➤In hydrostatic drive models:
Turn the nut (2) so that the spring (1) is 45 - 47
mm long, measured from the inside of the wash-
ers. 
Never go under these amounts to avoid over-
loading the brake unit.
NOTE
No further adjustments to the braking system are
required.
When the adjustments have been made, the parking
brake should prevent the machine from moving on a
slope of 30% (16°) with the driver in position.

Close up the wheels cover [see 2.5].
11
45 - 47
mm10
6
12
mm
5
46 - 48 mm
1359
72
4
8
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4.3.2
BRAKE ADJUSTMENT





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							© by GLOBAL GARDEN PRODUCTS
72
4.4.1
DRIVE BELT ADJUSTMENT





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WORKSHOP MANUAL
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4.4 DRIVE BELT ADJUSTMENT
(➤mechanical drive models)
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 stretcher can be reached through the hatch at
the base of the seat.
Adjust the tension of the spring 
(1)by turning the
nuts 
(2) until you obtain a length of 86 mm mea-
sured from the outer ends of the spring, with the
drive controls released.
In this condition, the control lever 
(3)should be
completely vertical.
When the adjustment is done, tighten the nuts 
(2).
NOTE
➤Hydrostatic drive models:there is no adjust-
ment to be made to the drive belt
.
3
90°
1
1
3
2
86 mm 
						

							© by GLOBAL GARDEN PRODUCTS
72
4.5.2
DRIVE LEVER ADJUSTMENT





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4.5 DRIVE LEVER ADJUSTMENT
( ➤hydrostatic drive models) 
This adjustment should be made every time work
is done on the drive lever unit or when the pedal
shaft, back axle or the lever return cable are dis-
mantled.
The main indicators that it is not working properly
are:
–the lever does not return when the pedal is
pressed = cable loose,
–the lever does not go the full distance, reducing
performance = cable too tight,
–the lever is stiff = the spring for the clutch
device is badly adjusted,
–he lever is too loose and, under pressure, does
not stay in position = the spring for the clutch
device is badly adjusted or there is oil on the
friction disc,
–the machine has a tendency to move when the
lever is in “neutral” = the connection rod is
incorrectly adjusted.
A) Adjusting the “neutral” position
The pedal position is to be adjusted starting with
the lever 
(1) of the hydrostatic unit in the “neutral”
position. This position «N» is easily recognised,
since it is held fast by a check ball.

Remove the right-hand rear wheel [ see 6.1].

Remove the collector channel [see 5.5]
Keep the lever
(1)held in “neutral” and with the
wheels cover closed and firmly fastened, turn the
nuts
(2)on the rod (3)until the control lever(4)is
centred on the central slit
(5)of the cover.
Check that the drive to the wheels engages only
when  the control lever 
(4)is moved forwards or
backwards.
Check that the probe of the microswitch 
(6)is in the
“pressed” position on the tip of the cam 
(8). If it
isn’t, loosen the locknuts 
(7)and move the
microswitch 
(6) sufficiently so that by moving the
control lever 
(4)the click of the contact can be
heard passing from the “pressed” position to the
“released” position.

Reattach the collector channel [see 5.5].
B) Adjusting the release rod of the clutch device
With the brake pedal released, turn the nuts (9) until
10
0,5 mm
11
9
4
5
23
1
N
7
8
6 
						

							there is a free play of 0.5 mm between the shoe (10)
and the release rod (11).
C) Adjusting the clutch device
When in motion, the lever is held in the selected
position by a clutch device which is made up of a
sliding sector 
(12)between two friction discs (13),
pressed together by a spring 
(14).
The spring tension 
(14)is adjusted at the nut (15)
until a length of 18 mm is obtained with the pedal
released.
Check that the friction discs 
(13)are in good condi-
tion and with no traces of oil. Otherwise replace
them [see 6.11]. 
D) Adjusting the lever return cable

Lift the wheels cover [see 2.5].
With the control lever in the “neutral” position and
the pedal released.
Check the length of the spring 
(16)and regulate the
adjuster 
(17)until a length of 74 - 76 mm is obtained
measured from the outside of the eye-rings.
When this adjustment has been made, with the
parking brake engaged, there should be free play of
0.5 ÷ 1 mm between the lever 
(18)and the limit stop
(19).

Close up the wheels cover [see 2.5].
E) Adjusting the limit stop position of the levers
If the stop hook has been dismantled or replaced,
the position of the terminal 
(20)will need to be
adjusted compared to the levers 
(21)and (22).
This must be a position which prevents the terminal
(20) from interfering with the swinging movement of
the lever 
(21)and blocking the lever (22)at the
same time. 

Lift the wheels cover [see 2.5].
Put the control lever in “neutral” and engage the
parking brake.
2120
22
19
0,5 - 1 mm
18
16
74 - 76 mm
17
18
mm
13
12
14
15
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4.5.2
DRIVE LEVER ADJUSTMENT





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© by GLOBAL GARDEN PRODUCTS 
						

							© by GLOBAL GARDEN PRODUCTS
72
4.5.2
DRIVE LEVER ADJUSTMENT





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WORKSHOP MANUAL
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3/2006
With both nuts (24)loosened, close the two levers
(22) and (23)so that the terminal (20) is held
between them, push it back as far as possible and
then tighten the two screws 
(24).

Close up the wheels cover [see 2.5].
Tightening torque
24Nuts for lever limit stop  .................. 8 ÷ 11 Nm
24
20
22
23