65
Maintenance Instructions CHECKING/SERVICING
Mower Deck Gearbox Oil Seals
The mower deck gearbox seals should be inspected
every 25 hours for evidence of oil leaking; particu-
larly the lower oil seal on the blade drive gear-
box. 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 operat-
ing 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 gear-
box assembly relubricated. Refer to LUBRICATION
for Mower Deck Gearbox Lubrication in this sec-
tion.
Spark Plugs
Every 100 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 Champion
®
type XC92YC
(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
The Briggs & Stratton engine is equipped with an
electronic ignition. No breaker points, maintenance,
or adjustments are necessary with this system.
Contact an authorized Briggs & Stratton engine
dealer in case of ignition failure.
Ignition Wires
Good preventative maintenance calls for complete re-
placement of spark plug wires every two (2) years.
Fuel Lines and Clamps
Every year, inspect the fuel line from the tank to
engine for deterioration or damage. Also, inspect
the fuel line clamps for tightness. Good preven-
tive maintenance calls for complete replacement of
fuel lines and clamps every two (2) years.
Transmission Control Setting
On a yearly interval or when an out-of-adjustment
condition is observed, check the transmission con-
trol for proper function as follows:
Neutral-Park
With the mower parked on level ground, start and
run the engine, rst 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 re-
verse, refer to ADJUSTMENTS for the Neutral
Function Adjustment - Step 3 in this section.
Straight Ground Tracking
Check for straight ground track by driving on a
smooth, level surface with hands o the steering le-
vers. Set the FSC at dierent speeds and observe
if the mower moves in a straight line (use a cement
joint or other line on the ground for reference). If the
machine is drifting to the right or left, refer to
ADJUSTMENTS for Straight Tracking Adjustment -
Step 5 in this section.
Blade Brake Action
WARNING
It is important to check and maintain
blade brake action for safe operation of
the machine.
Check the function of the cutter blade brake and
blower 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 and
blower pulley as a visual indication that movement
has stopped. If the brake is working properly, all
rotation will stop ve (5) seconds after disen-
gagement of the clutch. If the brake system mal-
functions - blades do not stop in ve (5) seconds -
adjust or repair the brake before operating the
mower. Refer to ADJUSTMENTS for Blade Brake
Band Adjustment in this section, or contact your au-
thorized Walker dealer for this service.
To Next Page
Loading...
Need help?
General
