Walker T25i Operator's Manual

Also see for T25i: Operator's Manual Safety, Assembly, Operating, and Maintenance Instructions Operator's manual

Contents

69Maintenance Instructions CHECKING/SERVICING6. Check blade balance by positioning the bladehorizontally on a blade balancer or use a nailor shaft through the center hole. If either end ofthe blade rotates downward, grind (remove)metal on that end until the blade will balance.The blade is properly balanced when neitherend drops. Balance of a blade is generallymaintained by removing an equal amount ofmaterial from each end of the blade whensharpening.Blade BalancerBlade Balanced on MagneticWall-Mounted Balancer7. Mount the blade with wing tips pointing up intothe housing. For gear driven decks reinstallthe blade, washer, lock washer, and nut. Tight-en the nut to 60 lb·ft (81 N·m). For belt drivendecks reinstall the spacer (if applicable), blade,washer, and bolt. Tighten the bolt to 70 lb·ft(90 N·m).NOTE: When reinstalling blades on GHS mod-els, remember, the blades turn toward eachother (counter-rotate) and the RH and LH bladecannot be switched. Check for proper blade ro-tation before installing blades on the deck. Re-fer to Blade Rotation for GHS Mower Deck il-lustration shown in Clogging Checklist inOperating Instructions for correct blade rotation.Drive BeltsRaise the body and inspect the condition of thefour (4) belts (3 belts on SD models) every 25 hoursof operation - engine PTO drive, jackshaft drive, hy-drostatic ground drive, and GHS blower drive. If thebelts show signs of cracking or deteriorating, thebelts should be replaced. Refer to REPLACING/REPAIRING the Drive Belts in this section.Mower Deck Gearbox Oil SealsThe mower deck gearbox seals should be inspectedevery 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 bladehub and seal protector plate on the housing, but isstill vulnerable to seal damage due to operating inan adverse environment. The mower blade must beremoved for inspection of the seal, so it is recom-mended to inspect the gearbox seals when bladesare removed for sharpening. If an oil leak is noted,the seal should be replaced and the gearbox as-sembly relubricated. Refer to LUBRICATION forMower Deck Gearbox Lubrication in this section.Spark PlugsEvery 200 hours of operation, remove the sparkplugs, inspect, clean, and reset the gap (or replacewith new plugs). Before removing the spark plugs,clean the area around the base of the plugs to keepdirt and debris out of the engine. Clean spark plugswith a wire brush. DO NOT use an abrasive grittype cleaner. If the electrodes are burned short orpitted, replace plugs with Champion ® 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 and22 lb·ft (24 to 30 N·m).Ignition WiresGood preventive maintenance calls for complete re-placement of spark plug wires every two (2) years.Fuel Lines and ClampsNOTE: The system is pressurized and should beserviced by a Walker dealer or authorized Kohlerengine service outlet.Every year, inspect the fuel supply line from thetank to engine for deterioration or damage. Also,inspect the fuel line clamps for tightness. Goodpreventive maintenance calls for complete replace-ment of fuel lines and clamps every two (2) years.Engine StarterYearly or every 500 hours disassemble and cleanthe solenoid shift starter. Refer to the Kohler ServiceManual for this procedure or contact an authorizedKohler engine dealer to perform this service.