T27i
Maintenance Instructions
Checking and Servicing
75
Mower Deck Gearbox Oil Seals
The mower deck gearbox seals should be inspect-
ed
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 vulnerable to seal damage due
to operating in an adverse environment. The mow-
er blade must be removed for inspection of the
seal, so it is recommended to
inspect the gear-
box seals when blades are removed for sharp-
ening.
If an oil leak is noted, the seal should be
replaced and the gearbox assembly relubricated.
Refer to
Mower Deck Gearbox Lubrication on page
59.
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 engine service outlet.
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.
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.
Transmission Control Setting
On a
yearly
interval or when an out-of-adjustment
condition is observed, check the transmission
control for proper function as follows:
Neutral-Park
With the mower parked on level ground, start and
run the engine, first at idle and then normal operat-
ing speeds. With the FSC in the
NEUTRAL-PARK
position, there should be no movement of either
drive tire. If the tire(s) are “creeping” forward or
reverse, refer to
Adjustments for Transmission
Control in Neutral Function Adjustment - Step 4 on
page 86
.
Straight Ground Tracking
Check for straight ground track by driving on a
smooth, level surface with hands off the steering
levers. Set the FSC at different speeds and
observe if the mower moves in a straight line (use
a cement joint or other line on the ground for refer-
ence). If the machine is drifting to the right or left,
refer to
Adjustments for Transmission Control in
Straight Ground Travel Adjustment - Step 5 on
page 87.
Blade Brake Action
WARNING
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 (and
blower brake on GHS models) by engaging the
blade clutch (PTO), operating the engine at full
throttle, then disengaging the clutch and measur-
ing how quickly the blades stop. Watch the rota-
tion of the blade drive shaft and blower pulley 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—adjust or
repair the brake before operating the mower. Con-
tact your Walker dealer for this service or refer to
Adjustments for Blade Brake Band Adjustment -
Step 3 on page 91
.
