Hitachi ZW 120-6 Operator's Manual page 241

8. One point each to right and left steering cylinder rod
pins (12 and 13).
--- every 500 hours (250 hours at first time only)
Left rear (12)
Right rear (13)
9. One point each to upper and lower frame center hinge
pins (14 and 15).
--- every 100 hours
Upper (14)
Lower (15)
MAINTENANCE
7-23
14 12, 13
MNSC-07-003
15