EMAK STARJET AJ102 Manual De Usuario página 55

6.3.12 CHECKING AND ADJUSTING THE DRIVE BELT
Regularly check the drive belt tension. The belt is properly tensioned, when exerting 4 kPa
of pressure halfway between pulleys (1) and (3) and the belt sags about 1.5 cm.
If the sag is greater, adjust the tension.
To measure the force, use, for example, a standard dynamometer available in
stores that carry them.
The positions in the illustration are:
(1) The engine pulley
(2) The guide pulley
(3) The tension pulley
(4) The transmission pulley
Adjust belt tension by tightening the nut on the bolt that tenses the tension spring, and then
finish the adjustment using the bolt (5) on the pulley (2) so that the spring is stretched to a
length of 50±1 mm.
Do not stretch the belt above this threshold. It can shorten the belt's life
and even damage the transmission!
6.3.13 REPLACING BELTS
Replacing the drive belt is a relatively demanding procedure and must be entrusted to an authorized
service facility.
6.3.14 REPLACING WHEELS
Before changing one of the wheels, park the tractor on a solid, level surface, shut off the engine and
remove the key from the ignition. Change the wheel as follows:
Raise the machine using an appropriate jack on the side on which the wheel is to be

changed. Set the jack below a solid part of the machine's frame or on the transmission
arm. Secure the machine below with an appropriate wooden block.
Remove the protective cover from the wheel (front wheels only).

Use an appropriate screwdriver to remove the retaining ring and remove the washer.

Take the wheel off the shaft. For rear wheels there is a spring on the shaft.

When putting the wheel back on, perform the assembly steps in reverse order. Before installing the
wheel, clean all parts, and lightly grease the shaft. Especially for wheels on the rear axle, this greasing
is indispensable for later wheel removal. If the shaft is not greased, later assembly may be
difficult.
When installing a rear wheel, be careful of the mutual position of the spring on the shaft and the groove
in the wheel.
6.3.15 REPAIRING TYRE DEFECTS
The machine is equipped with tubeless tyres. If they are defective, entrust their repair to a professional
tyre service or to an authorized Seco lawn mower service centre.
55
6.3.12a
6.3.12b
6.3.14