Fuel Filter; Blade Overload Shear Bolts - Walker D21d Operator's Manual

Maintenance Instructions

Fuel Filter

Model D21d has two (2) fuel filters. Replace both
the in-line filter and the Kubota filter element yearly
or every 400 hours of operation.
Cold Start Lever
(For Reference)
In­Line
Filter
Fuel Filter Location
IMPORTANT: Replace the fuel filters only in a clean
area where the fuel line and connections will not be
contaminated by dust and dirt.
1. Close the Kubota fuel filter cock.
2. Remove and replace the in-line filter; expand
and slide clamps on either side of the filter away
from filter and pull fuel lines off filter.
3. Loosen the ring screw on the Kubota filter as­
sembly, remove the filter pot and filter element.
4. Clean the filter pot and reassemble the filter as­
sembly with a new filter element (use only a
Kubota replacement filter #15231-43560).
5. Open the fuel filter cock.
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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 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.
Kubota
Fuel Filter
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.
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, con­
tact your Walker dealer.
REPLACING/REPAIRING
Cutting Blade
Shear Bolts
Cutting Blade Shear Bolts
Refer to CHECKING/SERVICING in