Manitowoc Grove RT770E - Page 205

5-5
RT770E HOIST AND COUNTERWEIGHT
5
Published 11/26/2014, Control # 447-05
GROVE
Table 5-1
Compare your reading with (Table 5-1) and take the required
action.
Reading Diagnosis Action Required
Oil is not visible in the sight glass.
The hoist is under
filled.
Fill the hoist with oil from the upper access hole until the
oil level rises within the sight glass. Do not fill above
3 mm (1/8 in) from the top of the site glass.
Refer to Hoist, page 9-30 for the correct type of oil.
Oil is visible in the sight glass and the
level is no more than 3 mm (1/8 in)
from the top of the sight glass.
The oil level is
correct.
No action is required.
Oil level is more than 3 mm (1/8 in)
from the top of the sight glass or the
oil is escaping from the vent plug (4).
The hoist is overfilled.
Drain the hoist drum from the upper access hole until the
oil level falls to within 3 mm (1/8 in) from the top of the
sight glass.
FIGURE 5-3
3
4
1
2