Walker MDD (20.9 HP) - Manual (Page 76)

Maintenance Instructions
REPLACING/REPAIRING
72
Fuel Filter
Model MDD 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 contaminated by dust and dirt.
1. Close the fuel tank shut-off valve and the Kubo-
ta 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 and fuel tank shut-off
valve.
Blade Overload Shear Bolts
NOTE: Shear bolts are not used on the DSD62
mower deck.
The cutting blade is keyed to the blade hub by two
(2) shear bolts (10-24 x 5/8 in. stainless steel ma-
chine 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
NOTE: Tightening the 5/8-18 blade mounting nut
to 60 ft-lb (81.3 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 sec-
tion for Sharpen Mower Blades which describes the
blade removal and installation procedure.
After reinstalling the blade, check blade timing by
moving blades through one (1) complete revolu-
tion. Make sure blade tips pass clear of each other.
If timing is incorrect, refer to Mower Deck Gearbox
Replacement in this section.
Kubota
Fuel Filter
In-Line
Filter
Cold Start Lever
(For Reference)
Cutting Blade
Shear Bolts