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WALKER MANUFACTURING COMPANY
July 2006
SERVICE INSTRUCTIONS
Fuel Filter - Model MD
Model MD has two (2) fuel filters. Replace both the
in-line filter and the Kubota filter element every 400
hours of operation.
Fuel Filter Location
IMPORTANT: Replace fuel filters only in a clean area
where the fuel line and connections will not be contam-
inated 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 assem-
bly, 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.
Blade Overload Shear Bolts - All Models
The 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 en-
counters a shock load.
Cutting Blade Shear Bolts
NOTE: Tightening the 5/8-18 blade mounting nut to
60 ft-lb (81.3 Nā
m) is also important for proper 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 CHECKING/SERVICING in the Mainte-
nance Instructions Section for Sharpen Mower
Blades which describes the blade removal and instal-
lation procedure.
After reinstalling the blade, check blade timing by mov-
ing blades through one (1) complete revolution. Make
sure blade tips pass clear of each other. If timing is in-
correct, refer to Mower Deck Gearbox Replacement
in this section.
CAUTION
Standard fuel line is not compatible and
must not be used! Use only Oetiker
clamps (Kohler Part No. 24 237 05-S or
Walker P/N 5879-5) on fuel line connec-
tions.
In-Line
Filter
Kubota
Fuel Filter
Cold Start Lever
(For Reference)
Cutting Blade
Shear Bolts
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