UNDERCARRIAGE / Front Idler Installation CAUTION: Front idler weight: ZAXIS450-3, 450LC-3, 470H-3, 470LCH-3: 281 kg (619 lb) ZAXIS500LC-3, 520LCH-3: 353 kg (778 lb) 1. Install the front idler in reverse procedures when removing. Clean and apply grease to the bearing (5) sliding surface on track frame (1). Direction to Install 1 5 W17P-03-05-001 W3-5-2