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Check the oil every time when topping up. The
level should come up to the “FULL” mark.
CHANGING THE TRANSMISSION
OIL (President - Pro16 - Pro18)
Change the oil the first time after 50 hours of oper-
ation, and then after every 250 hours or operation
or once a season.
Use a good grade of SAE 20W-50 oil (service
grade SE, SF or SG).
Total amount of oil:
President - 1.6 litres
Pro16, Pro18 - 3.3 litres
NOTE that the design of the transmission per-
mits only about 80% of the total amount of oil
to run out when the oil is changed.
After filling the transmission with oil, the oil
which is left in the transmission mixes with the
new oil.
You should, therefore, not pour in too much oil
when you change the oil. Check the oil level sev-
eral times while filling.
It is important that you observe clean-
ness when handling oil for the transmis-
sion. There must not be any particles of
dirt in the system as dirt can easily
cause total failure of the transmission.
President:
1. Unscrew the oil drain plug D. This is located to
the right as viewed from the rear (figs 14 and 25).
Allow the oil to run out into a collection vessel.
2. Screw the oil drain plug back into place.
3. Remove the oil dipstick and top up with new oil.
Pro16-Pro18:
1. Remove the oil reservoir cover (fig 10).
2. Unscrew the oil drain plug E. This is located to
the left as viewed from the rear (figs 15 and 26).
Allow the oil to run out into a collection vessel.
3. Screw the oil drain plug back into place.
4. Remove hose F from the lower side of the oil
reservoir (fig 16).
5. To facilitate filling up the oil, we recommend
that you use, for example, a pump (figure 16 shows
a STIGA pump, part number 1134-3898-01).
6. Fill the pump with oil. Then insert the nipple
into the hose F and slowly press the oil into the
transmission.
7. Connect the hose to the oil reservoir.
8. Finally, fill the oil reservoir with oil.
AIR BLEEDING (President - Pro16 -
Pro18)
After filling with oil, it may be necessary to bleed
the transmission.
1. Raise the rear part of the machine to enable the
drive wheels to rotate freely.
2. Start the engine and allow it to idle.
3. Press the drive pedal down forwards and back-
wards alternately.
4. When the drive wheels start to rotate, lower the
machine down onto its wheels.
5. Push the machine backwards while pushing the
front part of the drive pedal down. Then push the
machine forwards while pushing the rear part of
the drive pedal down.
6. When the machine starts to move, put the throt-
tle control at full throttle.
7. Start and stop the machine rapidly until its speed
is normal.
Remarks: Initial bleeding can be made as early as
when filling with oil. While filling, rotate the
transmission's belt pulley by hand.
REPLACING ENGINE OIL FILTER
(Pro16 - Pro18)
Replace the oil filter after every 100 hours of oper-
ation.
Before screwing the new filter securely into place,
oil the filter gasket with motor oil.
Screw the filter G securely by hand until the filter
gasket touches the filter attachment. Then tighten
three-quarters of a full turn (fig 13).
Start the engine and run it for 30 seconds. Then
switch off the engine. Check the oil level. If the oil
level is below the “FULL” mark on the dipstick,
top up with oil.
Start the engine and check for any oil leakage.
LUBRICATION
The machine has four grease nipples H which
should be lubricated with universal grease every