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Maintenance Instructions REPLACING/REPAIRING
Fuel Filter
DANGER
Gasoline is extremely ammable and can
be highly explosive. To minimize danger:
• Use only an approved fuel container for
gasoline.
• DO NOT allow open ames or sparks
near the machine while performing main-
tenance or refueling; DO NOT smoke
while working with fuel.
• Wipe up spilled gasoline immediately
and completely.
Model MC19 is equipped with an in-line fuel lter.
Visually inspect the lter periodically, and replace
the lter yearly.
In-Line
Fuel Filter
Fuel Filter Location
IMPORTANT: Replace the fuel lter only in a clean
area where the fuel line and connections will not be
contaminated by any dust and dirt.
1. Expand and slide clamps on either side of the
lter away from lter and pull fuel lines off lter.
2. Replace lter, making sure that the arrow on the
lter is aligned with the fuel ow through the
lter.
3. Verify that the fuel lines and clamps are secure-
ly attached, and that no fuel leaks are present.
Blade Overload Shear Bolts
NOTE: Blade shear bolts are not used on belt driv-
en decks.
On gear driven decks each cutting blade is keyed to
a blade hub by two (2) shear bolts (10-24 x 5/8 in.
stainless steel machine screws). These bolts are
designed to shear and protect the blade drive gear-
box from damage if the blade encounters a shock
load.
Cutting Blade
Shear Bolts
Cutting Blade Shear Bolts
NOTE: Tightening the 5/8-18 blade mounting nut
to 60 lb·ft (81 N·m) is also important for proper
shock load protection. It is important to not over-
tighten the mounting nut since this defeats (over-
rides) the function of the shear bolts.
If these bolts shear, remove the blade and install
new bolts. Refer to CHECKING/SERVICING in
this section for Sharpen Mower Blades which de-
scribes the blade removal and installation proce-
dure.
After reinstalling the blade, check blade timing (on
gear driven decks) by moving blades through one
(1) complete revolution. Make sure blade tips pass
clear of each other. If timing is incorrect, contact
your Walker dealer.