Alternator Belt Tension; Security Of Air Filtration Components; Battery; Electrolyte Level - Walker D21d Operator's Manual

Maintenance Instructions

Alternator Belt Tension

Check and adjust the alternator belt tension to avoid
engine overheating and insufficient battery
charging. Push on the belt in the middle of the span
between the alternator and crankshaft. If properly
tensioned, it should deflect about 0.4 in. (10 mm).
Also check the belt for cracks or deterioration.
Alternator Belt
Alternator Belt Tension

Security of Air Filtration Components

NOTE: The following inspection is only an exter nal
inspection and should be done without "dis-
turbing" the filtration components.
On a daily basis, visually inspect the external condi-
tion of the complete air cleaner system. The follow-
ing items should be inspected:
1. Check the Donaldson Radialseal™ air cleaner
canister for damage. Make sure the cover is in
place and the cover latches are secure—do not
run the engine without the air cleaner cover in
place and secure.
2. Inspect the air intake hose for cracks, nicks,
cuts, etc., and check the hose clamps for tight-
ness.
3. Check to make sure the air filter restriction
gauge is in place and hose connections are se­
cure.
0.4 in. (10 mm)
Deflection
CHECKING/SERVICING

Battery

NOTE: For initial battery service during setup, re fer
to Battery Service in Assembly Instructions.
IMPORTANT: Make sure battery is securely mount­
ed in the frame. A loose battery may cause damage
to the case resulting in acid leakage and severe
damage to the machine. A hazard may be created
by damage to critical working parts and safety sys­
tems.

Electrolyte Level

The battery electrolyte level should be checked af-
ter every 25 hours of operation. To check electro-
lyte level:
1. Remove battery cell filler caps.
2. Check the electrolyte level. If the level is below
the bottom of the vent well, fill with distilled wa­
ter to the bottom of the vent wells [1/4 to 1/2 in.
(6 to 13 mm) above the plates].
3. Replace filler caps.
IMPORTANT: DO NOT overfill the battery. Electro-
lyte will overflow through the vented caps onto parts
of the machine and WILL result in severe corrosion.

Cleaning the Terminals

If battery terminals are corroded, remove battery
from the mower. Using a wire brush, remove corro-
sion with a solution of one part baking soda and
four parts water. Rinse with clean water. Coat the
terminals with petroleum jelly or terminal protector
spray to retard further corrosion.
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