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 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 mower blade must be removed for inspection of the seal, so it is recom- mended to inspect the gearbox seals when blades are removed for sharpening. If an oil leak is not- ed, the seal should be replaced and the gearbox assembly relubricated. Refer to LUBRICATION for Mower Deck Gearbox Lubrication in this section.
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 Champion‚ type RC12YC (or equivalent). Check spark plug gap with a
Fuel Lines and Clamps
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 replace- ment 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 Service Manual for this procedure or contact an authorized Kohler engine dealer to perform this service.
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 by engaging the blade clutch (PTO), operating the engine at full throttle, then disengag- ing 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 five (5) seconds after disen- gagement of the clutch. If the brake system mal- functions - blades do not stop in five (5) seconds - adjust or repair the brake before operating the mower. Contact your Walker dealer for this service or refer to the Walker Service Manual.
Safety Switch System
WARNING
It is important to check and maintain the safety switch system for safe operation of the machine.
There are three (3) safety interlock switches on the tractor; Seat Switch, FSC Neutral - Park Switch, and PTO Switch.
NOTE: There is a 1/2 second time delay function on the seat switch to avoid engine power interruption when driving over bumps.
If any of the following conditions occur during start- ing or operating, a safety interlock switch may be malfunctioning. Contact your Walker dealer for trou- bleshooting 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.
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