Husqvarna Z448 Manual De Usuario página 22

5. Find the drain hose at the right rear part of the
engine.
6. Put a container below the oil drain hose.
7. Remove the oil drain plug.
8. Let the oil run out into the container.
9. Replace and install the oil drain plug.
10. Fill with new oil and do a check of the engine oil
To do a check of the engine oil
level. Refer to
level on page 21 .
11. Install the oil tank cap and the dipstick.
Note:
For safe disposal of used engine oil, refer to
Disposal on page 27 .
To remove air from the hydrostatic
system
You must remove air from the hydrostatic
system regularly to prevent high noise operation,
high operation temperature, component damage,
excessive expansion of hydraulic oil, and decrease
of the drive. The first time that air is removed from
the hydrostatic system, the drive wheels must be set
above the ground. You must also remove air from
the hydrostatic system each time the hydrostatic
system has been opened for maintenance and when
hydraulic oil has been added.
1. Make sure that the hydraulic oil level is correct.
2. Disengage the parking brake.
3. Disengage the drive system. Refer to
disengage and engage the drive system on page
12 .
4. Start the engine and apply fast idle speed. Refer
To start the engine on page 13 .
to
5. Slowly move the control levers forward and
rearward approximately 5 or 6 times. When air
is removed from the hydrostatic system, the
hydraulic oil level will decrease.
6. Set the throttle control to idle speed. Refer to
Throttle control on page 4 .
7. Engage the drive system. Refer to
and engage the drive system on page 12 .
8. Slowly move the control levers forward and
rearward for 5 or 6 times.
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9. Stop the engine.
10. Do a check of the hydraulic oil level and fill
11. If it is necessary, do the above steps again until
To do maintenance on the
hydrostatic transmission
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Lubrication, general information
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To
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To disengage
hydraulic oil if it is necessary.
all air has been removed from the hydrostatic
system. When the product operates correctly,
all air has been removed from the hydrostatic
system.
CAUTION:
are to do warranty repairs must have
an approval before maintenance of
a hydrostatic transmission, unless the
servicing dealer is a current approved
servicing center for the brand of
transmission being serviced.
Do a check of the oil level in the expansion
tanks. If the engine is cold, make sure that the
tanks are at the FULL COLD level.
Examine the drive belt, idler pulleys and idler
springs. Make sure that the drive belt has traction
and that the tension is correct.
Examine the transmission cooling fan for broken
and bent blades.
Remove grass, leaves and dirt.
Examine the parking brake and vehicle linkage to
make sure that they operate correctly.
Examine the vehicle control linkage to the
directional control arm on the transaxle.
Make sure that the control arm is correctly
attached to the trunnion arm of the transaxle.
Examine the bypass mechanism on the transaxle
unit linkage to make sure that it rotates and
releases fully.
Remove the ignition key to prevent accidental
movements during lubrication.
Clean the area before you lubricate a part on the
product.
Use oil when you lubricate with an oil can.
When you lubricate with grease, use a chassis
or ball bearing grease that prevents corrosion.
Remove unwanted grease after lubrication.
Lubricate 2 times a week if you operate the
product daily.
Do not spill lubricant on the drive belts or the
grooves of the belt pulleys. If you do spill, clean
with alcohol. If the friction between the drive belt
and the pulley is not sufficient after you clean
with alcohol, replace the drive belt.
CAUTION:
other petroleum products to clean drive
belts.
Servicing dealers that
Do not use gasoline or
2237 - 001 - 11.08.2023