Hitachi ZX27U-2 Operator's Manual page 146

5. Slowly loosen drain plug (2) on the bottom of the hy-
draulic oil tank. Allow oil to drain thoroughly
6. Clean, install and tighten drain plug (2) to the original
position.
⋅ ZX30U
ZX27U
-2 -2
Wrench Size : 12 mm (PT3/8 Square Head Plug)
Tightening Torque : 49 N⋅m (5 kgf⋅m, 36 lbf⋅ft)
ZX40U and ZX50U
-2
Wrench Size : 27 mm (G1/2 Hexagonal Head
Tightening Torque : 95 N⋅m (9.7 kgf⋅m, 70 lbf⋅ft)
7. Supply hydraulic oil via the filler port on the top of the
hydraulic oil tank while checking the oil level with level
gauge (3).
MAINTENANCE
and ZX35U
-2
-2
Plug with O-ring)
2
ZX27U
7-26
, ZX30U , ZX35U
-2 -2 -2
3
ZX40U , ZX50U
-2 -2
M1M7-07-033
3
M1M7-07-034
M1M7-03-004