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JWN-SERIES RIDE-ON POWER TROWEL • OPERATION MANUAL — REV. #1 (05/12/12) — PAGE 23
MAINTENANCE
When performing any maintenance on the trowel or engine,
follow all safety messages and rules for safe operation
stated at the beginning of this manual.
At the front of this manual there is a “Daily Pre-Operation
Checklist”. Make copies of this checklist and use it on a
daily basis.
MAINTENANCE SCHEDULE
1. Check and retighten all fasteners as necessary.
Daily (8-10 Hours)
1. Check the fluid levels in the engine and gearboxes, fill
as necessary. Check air cleaner. See section on Air
Cleaner servicing.
Weekly (30-40 Hours)
1. Relube arms, thrust collar and steering links.
2. Replace blades if necessary.
3. Check and clean or replace the engine air filter
as necessary. (See following section on Air Filter
Maintenance.)
4. Replace engine oil and filter as necessary. (See
following section on Oil and Filter.)
Monthly (100-125 Hours)
1. Remove, clean, reinstall and relube the arms and thrust
collar. Adjust the blade arms.
2. Replace gearbox lubricant after the first 100 hours of
operation. Replace every 500-600 hours thereafter.
3. Check drive belt for excessive wear. (Refer to following
section on Drive Belt maintenance.)
WARNING
Accidental starts can cause severe injury or
death.
ALWAYS place the ON/OFF switch in the
OFF position.
Disconnect and ground spark plug leads
and disconnect negative battery cable
from battery before servicing.
Yearly (500-600 Hours)
1. Check and replace if necessary the arm bushings, and
thrust collar bushings, shaft seals and belts.
2. Check pitch control cables for wear.
3. Replace gearbox lubricant.
Air Cleaner (Daily)
Thoroughly remove dirt and oil from the engine and
control area. Clean or replace the air cleaner elements as
necessary. Check and retighten all fasteners as necessary.
1. Release the four latch tabs (Figure 13) from the air
cleaner cover, and remove the cover.
Figure 13. Air Cleaner Components
2. Remove the foam filter from the cover.
3. Remove the paper filter from the air cleaner case.
4. Inspect both air filter elements, replace them if necessary.
5. To clean the paper air filter, tap the filter element
several times on a hard surface to remove dirt, or
blow compressed air (not to exceed 30 psi (207 kPa,
2.1 kgf/cm2) through the filter element from the air
cleaner case side.
6. NEVER try to brush off dirt; brushing will force dirt
into the fibers. If the paper element is excessively dirt,
replace element.
7. Clean the foam air filter element in warm soapy water,
rinse and allow to dry thoroughly. Or clean with a
nonflammable solvent and allow to dry. DO NOT pour
any type of oil into the foam element.
8. Wipe dirt from the inside of the air cleaner body and cover,
using a moist cloth. Be careful not to let any dirt or debris
enter the air chamber that leads to the carburetor.