36
Section 4 Maintenance and Lubrication
Z52®, Z60® & Z72® Zero Turning Radius Mowers Accu-Z 356-005M
03/11/03
Land Pride
Kawasaki Engine Shown
Figure 4-8
Engine Air Filter
Refer to Figure 4-9
Perform engine air filter maintenance per Maintenance
Schedule on page 31.
A specially designed dry filter is standard equipment on
the mower and supplies clean combustion air to the
engine.
Figure 4-9
Many engine failures can be attributed to improper air
cleaner servicing. Ingested dust and dirt will cause
cylinder, piston and bearing damage in a few hours.
Dusted engines will result from:
1.
Over servicing the air filter element.
2.
Improper installation of an air filter element.
3.
Damaged filter, seals or canister.
4.
Incorrect air filter element size and/or use of poorly
designed aftermarket air filter elements.
Air cleaner servicing is an inexpensive maintenance
check that can prevent costly non-warrantable premature
engine damage.
Over Servicing
Over servicing occurs when an air filter element is
removed for cleaning or replacement before it is
necessary. Each time the filter is removed a small amount
of dirt and dust could fall in the intake system. This
accumulated dirt can cause a dusted engine. It only takes
a few grams of ingested dirt over the normal service life of
an engine to cause a dusted engine.
Do not clean element, replace with a new element
only. Cleaning used air filter elements, through improper
cleaning procedures, can get dust on the inside of the filter
causing dirt ingestion and engine failure.
It is important to note that whenever an air filter element is
cleaned by any method, the person or company
performing the cleaning assumes responsibility for the
integrity of the filter from then on. The Donaldson
warranty for air filters expires upon cleaning or
servicing in any manner because the condition of the
filter after servicing is completely out of their control.
Therefore, on a dust ingested engine failure, there will
be no warranty consideration if the air filter element
has been cleaned or serviced in any manner.
A partially dirty air filter element works better than a new
element. Therefore, a dirty filter element is not bad for the
engine unless it is excessively restricting the air flow and
engine performance is affected. The reason is simple. The
media in the filter must be porous to allow air to pass
through it. When dirty air passes through the filter, the dirt
plugs some of the holes in the media and actually acts as
part of the filter media. When the next round of dirt enters,
the first dirt helps filter out even smaller particles making
the filter more efficient at stopping dirt from entering the
engine. This is referred to as barrier filtration.
Of course, at some point the filter media becomes too
clogged to allow air to pass.
The mowing conditions will determine the frequency of air
filter element changing.
Improper Installation
Dust must not leak past the seals on each end of the air
filter element. The filter must be aligned within the canister
and properly seated for an effective seal so that no dirt can
enter the engine.
19072
Oil Filter
Engine Oil Filler Tube
Drain Plug
Pre-cleaner
Canister
