Hitachi ZW 550-6 Operator's Manual page 306

11. Two points to main propeller shaft universal (26).
--- every 12000 hours
f
NOTE: When the machine is continuously operated
under severe conditions for a long time, shorten the
greasing intervals.
12. One point to front (second) propeller shaft universal
(18).
--- every 12000 hours
f
NOTE: When the machine is continuously operated
under severe conditions for a long time, shorten the
greasing intervals.
MAINTENANCE
7-22
26
MNHE-07-017
18
MNHE-07-013