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WALKER MANUFACTURING COMPANY
July 2006
SERVICE INSTRUCTIONS
Mower Deck Gearbox Oil Seals - All Decks
The mower deck gearbox seals should be inspected
every 25 hours for evidence of oil leaking; particularly
the lower oil seal on the blade drive gearbox. This
seal is protected by the trash guard on the blade hub
and seal protector plate on the housing, but is still vul-
nerable to seal damage due to operating in an adverse
environment. The mower blade must be removed for
inspection of the seal, so it is recommended to inspect
the gearbox seals when blades are removed for
sharpening. If an oil leak is noted, the seal should be
replaced and the gearbox assembly relubricated. Re-
fer to LUBRICATION for Mower Deck Gearbox Lubri-
cation in the Lubrication Section.
Fuel Lines and Clamps - All Models
Every year, inspect the fuel supply line from the tank to
engine for deterioration or damage. Also, inspect the
fuel line clamps for tightness. Good preventive main-
tenance calls for complete replacement of fuel lines
and clamps every two (2) years.
Model MTEFI, MTLEFI
NOTE: High-pressure fuel line with an SAE R9 rating
is required for safe and reliable operation, due to the
higher operating pressure of the EFI system. Special
Oetiker clamps are used on all fuel line connections to
prevent tampering and safety hazards with the high fuel
pressure. The old clamp must be cut to open a connec-
tion, so replacement is necessary each time.
Model MD
NOTE: This procedure is of special importance for the
diesel engine due to poor performance when air is in-
jected with the fuel.
Radiator Hoses and Clamps - MD, MTL
Inspect the radiator hoses every 200 hours for deteri-
oration or damage. Also check the tightness of the hose
clamps. Good preventive maintenance calls for com-
plete replacement of the radiator hoses and clamps
every two (2) years.
Engine Valve Clearance - Model MD
Check and adjust the Kubota engine valve clearance
every 800 hours. Refer to the Kubota Engine Owner's
Manual and Workshop Manual for specifications and
procedure to check the valve clearance. For engine
servicing, contact an authorized Kubota engine dealer
or a trained engine technician.
IMPORTANT: Always use the proper engine service
manual when working on the engine. Improper engine
maintenance or adjustments will adversely affect en-
gine operation, performance, and durability and may
VOID the warranty.
Engine Valve Clearance - Model MC
Yearly or every 500 hours, check and adjust the
Kohler engine valve clearance. Refer to the Kohler Ser-
vice Manual for specifications and procedure to check
the valve clearance or contact an authorized Kohler en-
gine dealer to perform this service.
Fuel Injection Nozzle Pressure - Model MD
Check and adjust the Kubota diesel engine fuel injec-
tion nozzle pressure yearly or every 1000 hours (or in
case of low power). Refer to the Kubota Workshop
Manual for specifications and procedures to check noz-
zle pressure. For engine servicing, contact an autho-
rized Kubota engine dealer or a trained engine
technician.
IMPORTANT: Always use the proper engine service
manual when working on the engine. Improper engine
maintenance or adjustments will adversely affect en-
gine operation, performance, durability, and may VOID
the warranty.
Engine Starter - Model MC, MT, MTL, MTEFI
Yearly or every 500 hours disassemble and clean the
solenoid shift starter. Refer to the Kohler Service Man-
ual for this procedure or contact an authorized Kohler
engine dealer to perform this service.
CAUTION
Standard fuel line is not compatible and
must not be used! Use only Oetiker
clamps on fuel line connections.
WARNING
The fuel oil injection system operates un-
der high pressure and can penetrate the
skin and result in serious injury. Unqual-
ified persons should not remove or at-
tempt to adjust a pump injector, nozzle, or
any part of the fuel injection system.
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