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Section 4 Maintenance and Lubrication
ZRP44 & ZRP52 Zero Turning Radius Mowers 356-117M
7/14/08
Land Pride
Table of Contents
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 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.
Damaged filter, Seals or Canister
Never bang or bump the filter element against the tire or
any solid object, as dust and dirt particles will be forced
through the media causing continual passing of dirt into
the engine. Visually inspect the outside of the air cleaner
canister periodically for external damage and replace if
necessary.
Incorrect Air Filter Element
Use only the correct Donaldson air filter element, Land
Pride part number 839-312C, which is designed to fit the
canister properly. Land Pride air filter elements have the
correct media composition, filter area, micron size and
dimensions. Always use genuine Land Pride filters. Many
aftermarket filters have been found to be incompatible
with Land Pride’s canisters and engines.
The air filter must remain intact to block passage of dirt
and foreign particles from entering the engine. Being
inclined to disbelieve the need for more expensive air filter
elements used on gasoline engines may cause some
individuals to opt for a less expensive part.
The filter element must be sufficient size and construction
to withstand stresses, caused by rapid cycling of the air
volume demanded by the engine, without cracking or
tearing under fatigue and pressure. Therefore, Land Pride
and the engine manufacturers have carefully selected a
reliable filter designed to fit the needs of the engines. The
filter specified is a Donaldson filter, Land Pride part
number 839-312C.
Owners should be reminded that failure to use original
equipment replacement parts is an alteration and will not
be considered for warranty in the event of engine damage.
Engine Air Filter Service Procedure
1.
Release clamps and remove element. Clean the
canister with a damp cloth.
2.
Before installing a new element, inspect it by placing a
bright light inside and rotate the element slowly,
looking for any holes or tears in the paper. Also check
gaskets for cuts or tears. Do not attempt to use a
damaged element which will allow abrasive particles
to enter the engine.
3.
Reinstall the dust cup. Make sure it seals all the way
around the air cleaner body, then tighten the clamps.
4.
Check all fittings and clamps periodically for tightness
and inspect hoses for holes or cracks.
5.
Periodically check the intake hose for signs of
ingested dust. Locate and repair the source of
ingested dirt.
6.
Never operate a machine without an air filter installed.
General Engine Maintenance
Detailed instructions and recommendations for break-in
and regular maintenance are specified in the engine
operator’s manual. Please refer to this manual for engine
servicing, lubricating oil levels with quality and viscosity
recommendations, bolt torques, etc. The engine warranty
is backed by the engine manufacturer. Special attention
should be paid to applicable data which will not be
duplicated here.
Belt Replacement
Refer to Figure 4-11 and Figure 4-12:
Replace belts which show signs of severe cuts, tears,
excessive weather checking and cracking or burns
caused by slipping. Slight raveling of belt covering does
not indicate failure, trim ravelings with a sharp knife.
Inspect the belt pulley grooves and flanges for wear. A
new belt, or one in good condition, should never run
against the bottom of the groove. Replace the pulley when
this is the case, otherwise belt will lose power and slip
excessively.
Never pry a belt to get it on a pulley as this will cut or
damage the fibers of the belt covering.
Keep oil and grease away from belts, and never use belt
dressings. Any of these will destroy the belt composition in
a very short time.
!
WARNING!
If the pump belt fails, loss of control may occur when operating
on a slope.
