Each 100 hours of operation or 3 months Clean or replace paper air cleaner cartridge. Tap gently to remove dirt. Change engine oil. Use SAE 30 or 10W–30 detergent oil. Each 500 hours of operation or 6 months Change pump oil. Use SAE 20 or 30 non–detergent oil or genuine CAT pump oil. 308532 9 Troubleshooting WARNING To reduce risk of serious injury, including fluid injection and splashing in eyes, or on skin, always follow Pressure Relief Procedure on page 6 before proceeding. Problem Cause Solu