Spark Plugs; Ignition Wires; Fuel Lines And Clamps; Blade Brake Action - Walker B27i Operator's Manual

Maintenance Instructions
Checking and Servicing

Spark Plugs

Every 200 hours of operation, remove the spark
plugs, inspect, clean, and reset the gap (or replace
with new plugs). Before removing the spark
plugs, clean the area around the base of the plugs
to keep dirt and debris out of the engine. Clean
spark plugs with a wire brush. DO NOT use an
abrasive grit type cleaner. If the electrodes are
burned short or pitted, replace plugs with Cham-
pion type RC12YC (or equivalent). Check spark
®
plug gap with a wire-type feeler gauge and set the
gap at 0.030 in. (0.76 mm). Reinstall and tighten
to between 18 and 22 lb·ft (24 to 30 N·m).

Ignition Wires

Good preventive maintenance calls for complete
replacement of spark plug wires every two (2)
years.

Fuel Lines and Clamps

NOTE: The engine fuel injection system is pres-
surized and should only be serviced by a Walker
dealer or authorized Kohler service dealer.
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 maintenance calls for complete
replacement of fuel lines and clamps every two
(2) years.

Blade Brake Action

It is important to check and maintain blade
brake action for safe operation of the ma-
chine.
Check the function of the cutter blade brake by
engaging the blade clutch (PTO), operating the
engine at full throttle, then disengaging the clutch
and measuring how quickly the blades stop.
Watch the rotation of the blade drive shaft as a
visual indication that movement has stopped. If
the brake is working properly, all rotation will
stop five (5) seconds after disengagement of
the clutch. If the brake system malfunctions –
blades do not stop in five (5) seconds, the electric
clutch/brake assembly will need to be repaired or
replaced. Contact your Walker Dealer for this
service.
58
WARNING

PTO U-Joints

The PTO U-joints should be inspected yearly for
looseness and wear. If either is noticed, the
respective shaft or tube should be replaced. A
worn U-joint can cause vibration and extensive
damage to the PTO and the whole machine.

Engine Starter

Yearly or every 500 hours disassemble and clean
the solenoid shift starter. Refer to the Kohler Ser-
vice Manual for this procedure or contact an autho-
rized Kohler engine dealer to perform this service.

Safety Switch System

WARNING
It is important to check and maintain the
safety switch system for safe operation of
the machine.
There are four (4) safety interlock switches on the
tractor; Seat Switch, FSC Neutral-Park Switch,
PTO Switch, and Parking Brake Switch.
If any of the following conditions occur during
starting or operating, a safety interlock switch may
be malfunctioning. Contact your Walker dealer for
troubleshooting and/or replacement.
● With or without an operator in the seat, the
engine starts with the Forward Speed Control
(FSC) and/or the PTO engaged, or the parking
brake disengaged.
● With an operator in the seat and the parking
brake engaged, the engine starts but dies
soon after the parking brake is disengaged
and the Forward Speed Control (FSC) or PTO
is engaged.
● Without an operator in the seat, the engine
starts and continues to run with the Forward
Speed Control (FSC) and/or PTO engaged, or
the parking brake disengaged.
● With an operator in the seat, the Forward
Speed Control (FSC) and PTO disengaged,
the parking brake engaged, and Oil Pressure
Warning Horn sounding, but the starter will
not engage.
B27i