Maintenance Instructions B27i
Replacing and Repairing
62
Fuel Filter
DANGER
Gasoline is extremely ammable and can
be highly explosive. To minimize danger:
● Before servicing the fuel system:
1. Disconnect the spark plug leads.
2. Disconnect the negative (-) battery
cable from battery.
● Use only an approved fuel container
for gasoline.
● DO NOT allow open ames or sparks
near the machine while performing
maintenance or refueling; DO NOT
smoke while working with fuel.
● Wipe up spilled gasoline immediately
and completely.
Model B27i is equipped with an inline fuel lter
between the fuel tank and the fuel pump (low pres-
sure fuel pump). Visually inspect the lter periodi-
cally, and replace the lter every 400 hours. Use
Walker P/N 5020-3 or Kohler P/N 24-050-13, 9-12
microns for replacement lter.
Fuel Pump
In-Line
Fuel Filter
Fuel Pump and Fuel Filter Locations
IMPORTANT: Replace the fuel lter only in a
clean area where the fuel line and connections will
not be contaminated by dust and dirt.
1. Expand and slide clamps on either side of the
lter away from lter and pull fuel lines o 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 se-
curely attached, and that no fuel leaks are
present.
Blade Overload Shear Bolts
NOTE: Blade shear bolts are not used on belt
driven decks.
On gear driven decks, each cutting blade is keyed
to the 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 gearbox 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 prop-
er shock load protection. It is important to not
overtighten the mounting nut since this defeats
(overrides) the function of the shear bolts.
If these bolts shear, remove the blade and install
new bolts. Refer to Sharpen Mower Blades on
page 56 which describes the blade removal and
installation procedure.
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.
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