Hitachi EX 3600-6 Operator's Manual page 196

15. Remove drain plug (2) on the suction manifold and
loosen drain valve (3).
Allow oil to drain.
16. Remove drain plug (9) under oil tank and loosen
drain cock (8) to drain water and sediment com-
pletely.
17. Install drain cock (8).
18. Tighten drain valve (3).
19. Clean, install and tighten drain plug (2).
20. Add oil via cover (4) hole until it is between the marks
on sight gauge (5) of hydraulic oil tank. Be sure to
use only recommended oil (see Recommended Hy-
draulic Oil Chart).
21. Reinstall cover (4) with bolts (4 used). At this time, be
sure to replace the O-ring with new one and check
that it is correctly installed.
22. Bleed any air remaining in the hydraulic system
NOTE: Refer to page 7-58 for bleeding air properly.
23. Confirm that the oil level is at the mark on gauge (5).
Start the engine and operate all cylinders and motors
at slow speed for about 15 minutes. Stop the engine
after bleeding air from the hydraulic circuit sufficiently.
Ten to twenty minutes later, check oil level again and
add oil if necessary.
NOTE: Always allow oil to settle before checking the
level. This may require 15 minutes.
NOTE: Oil can be refilled from the ground using the
Fast-Filling panel located in the rear of the base
machine. Refer to page 1-38 for the Fast-Filling
panel operation.
MAINTENANCE
7-57
8
5
3
2
M146-03-033
4
M146-07-031
9
M146-03-034
M146-07-034