1998 S/N 21329 - Walker Mowers

Maintenance Instructions
CLEANING
Turbine Precleaner
The turbine precleaner is mounted on a remote air
intake tube connected to the Donaldson air cleaner.
A spinning fan driven by the intake airflow separates
dust from the air, giving the initial stage of air cleaning.
Dust particles are exhausted through a single
small vent in the side of the housing. Since no dust
is trapped, the precleaner operates without cleaning.
The only maintenance required is to check the
operation of the internal fan every 100 hours. Verify
operation:
1. Look into the exhaust vent while shining a light
into the intake.
Cover
Vacuator
Valve
Cover Latch
Canister
Radialseal
Filter Element
2. Start the engine and watch the fan begin to spin
as the throttle is advanced.
If the fan is not spinning, service or replace the precleaner
as required.
Donaldson Radialseal Air Cleaner (Primary)
A remote mounted Donaldson Radialseal air
cleaner provides the primary air filtering function
(ahead of the standard Kohler engine air cleaner).
The paper filter element slides over an outlet tube inside
the air cleaner canister with radial sealing action,
eliminating the possibility of dust leaks due to
improper filter installation. Intake design, internal
baffling, and a Vacuator valve provide dust separation
and automatic precleaning action. Daily or
frequent servicing of the air cleaner is not required.
Use the air restriction gauge on the air cleaner outlet
to indicate when the air filter needs servicing -- a red
flag will appear when the filter is overly restricting
airflow into the engine.
IMPORTANT: Use only Donaldson air filter elements
for replacement (Donaldson P822686 or
Walker 5090-1). Aftermarket filters may not seal
properly or filter efficiently.
Air Cleaner Components
(shown with cover being removed)
IMPORTANT: The Donaldson air cleaner uses a dry
paper-type air filter element. NEVER apply oil to the
paper element.
Push Button to Reset
Indicator After Service
Air Restriction
Gauge
Air Restriction Gauge Location
Clean and inspect the paper element after every
100 hours of service and replace the element yearly
or after six (6) cleanings (or when dirty or damaged).
More frequent cleaning may be required
when operating in extremely dusty conditions as indicated
by the air restriction gauge. Service the air
cleaner as follows:
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