310A - BACKHOE, LOADER CHASSIS WEIGHTS 1749 Parts group CHASSIS WEIGHTS 1749 CHASSIS WEIGHTS 1749 . FRONT AXLE COUNTERWEIGHT FOR BACKHOE (260 KG (574 LBS.)) [01K05] ADDITIONAL FRONT AXLE COUNTERWEIGHT FOR BACKHOE (123 KG (271 LBS.)) [01K06]