Manitowoc 777 Service And Maintenance Manual

Reference Only
HYDRAULIC SYSTEM 777 SERVICE MANUAL
2-20 Published 10-01-2012, Control # 045-08
Initial Oil Fill
1. Check for correct piping between load drum pumps and
filters. Oil must flow as shown in Figure 2-17.
2. Fill all pump cases (except auxiliary) with oil to level of
case drain ports (4, Figure 2-17). Use new oil filtered
through a 10-micron element.
3. Fill all motor cases with oil to level of case drain ports
(Figure 2-18). Use new hydraulic oil filtered through
a 10-micron filter.
4. If crane has an auxiliary load drum, fill auxiliary pump
case as follows:
a. Disconnect case drain hose (1, Figure 2-19) from
manifold on hydraulic tank.
b. Place end of hose (1) in a container below level of
auxiliary pump.
c. Disconnect case drain hose (2, Figure 2-19) from oil
cooler manifold under fuel tank.
d. Fill hose (2) with oil until oil flows out hose (1). Use
new oil filtered through a 10-micron element.
e. Securely reconnect hoses (1 and 2, Figure 2-19).
5. Make sure main tank and supercharge filter shut-off
valves are fully opened (Figure 2-20).
6. At engine, check that engine clutch is engaged
(Figure 2-21).
7. Remove cap from bleed port at Filters 1, 3, 4, and 6 if
equipped (Figure 2-22).
A1033
OUT
(to filter)
Filter
Adapter
IN (from filter)
Closest Port to Pump
Typical All Load Drum Pumps
Out
(to pump)
IN
(from pump)
Filter (arrows
on head indicate
proper oil flow)
FIGURE 2-17
CAUTION
Equipment Damage!
Incorrect oil flow through filters will result in damage to
pumps and motors.

Manitowoc 777 Specifications

General

Brand	Manitowoc
Model	777
Category	Construction Equipment
Language	English