Hitachi ZW 310-6 Operator's Manual page 342

6. One point each to right and left lift arm pivot pins (8).
--- every 500 hours (250 hours at first time only)
7. One point each to right and left lift cylinder pins (9).
--- every 500 hours (250 hours at first time only)
8. Two points to right steering cylinder pins (10 and 11).
--- every 250 hours
Cylinder right front (10)
Cylinder right rear (11)
9. Two points to left steering cylinder pins (12 and 13).
--- every 250 hours
Cylinder left front (12)
Cylinder left rear (13)
MAINTENANCE
7-28
90Z7-7-21-1
90Z7-7-21-2
90Z7-7-22-1