Simplicity 1691957 GTH-L Parts Manual
![Simplicity 1691957 GTH-L Tractor manual cover](/images/XVJzhaYKZVYkqEPPVDUtHwdS/thumbs/thumb175x175.webp)
To change the oil, first, run the engine for a few minutes to warm it up. Then, turn off the engine and remove the spark plug wire. Place a container under the oil drain valve, open the valve, and let the oil drain completely. Replace the oil filter, close the valve, and refill with new oil, checking the level with the dipstick.
Use unleaded gasoline with an octane rating of 87 or higher. Avoid using gasoline with more than 10% ethanol content to prevent engine damage.
Check the battery for a full charge and clean, secure connections. Ensure the fuel tank has fresh gasoline and the fuel filter is not clogged. Inspect the spark plug for wear or fouling and replace if necessary. Ensure that the safety interlock switches are functioning properly.
The recommended tire pressure for the front tires is 14 PSI, and for the rear tires is 10 PSI. Ensure to check the pressure regularly and adjust as needed for optimal performance.
Clean the tractor thoroughly, removing any dirt and debris. Stabilize the fuel or drain it completely. Change the oil and replace the oil filter. Inflate the tires to the recommended pressure and disconnect the battery. Store in a dry, covered area.
Locate the cutting height adjustment lever on the tractor. Move the lever to the desired cutting height position, which is typically marked on the tractor. Ensure that the deck is level and check the height on a flat surface to confirm.
Check the PTO switch to ensure it is in the "on" position. Inspect the drive belt for signs of wear or damage and replace if necessary. Verify that the safety interlock switches are functioning and that there is sufficient battery power.
Check the air filter every 25 hours of operation or monthly. Clean it if it's dirty, and replace it every 100 hours or annually, whichever comes first, to ensure optimal engine performance.
Regularly check and change the oil, replace the oil filter, and inspect the air filter. Keep the mower deck clean, check tire pressure, and lubricate all moving parts. Sharpen or replace mower blades as needed, and ensure the battery is charged and connections are clean.
Excessive vibration may be caused by unbalanced or damaged mower blades. Check the blades for damage and balance them if necessary. Inspect the drive belt for wear or misalignment, and ensure all mounting hardware is secure.