Manitowoc 777 Service And Maintenance Manual

Reference Only
HYDRAULIC SYSTEM 777 SERVICE MANUAL
2-14 Published 10-01-2012, Control # 045-08
10. Bleed air from boom hoist cylinder pressure sender as
follows:
a. Connect a bleed line with a shut-off valve to coupler
for boom hoist cylinder pressure sender
(Figure 2-12). Open valve in bleed line. Use a
suitable container to catch oil flow.
b. With all control handles in off, start engine and allow
it to idle.
c. Crack open shut-off valve — 1/4 turn
COUNTERCLOCKWISE — for boom hoist cylinder
pressure sender (Figure 2-13) so oil flows to bleed
line. Boom may lower slowly during this step.
d. Observe oil flowing from bleed line at boom hoist
cylinder pressure sender.
e. Close shut-off valve for boom hoist cylinder
pressure sender (Figure 2-13) when clear oil flows
from bleed line (no air bubbles in oil).
f. Stop engine.
g. Remove bleed line from coupler at boom hoist
cylinder pressure sender.
11. Fully open shut-off valve for boom hoist cylinder
pressure sender (Figure 2-13) — turn
COUNTERCLOCKWISE. Erratic operation will result
if this step is not performed.
Swing Planetary
Brake Solenoid Valves
Crawler Planetary
2 Places
Load Drum Planetary
Typical 2 – 4 Places
Disc Brake
Disc
Brake
Disc
Brake
FIGURE 2-14
P496
P516
A961
P495
P515a

Manitowoc 777 Specifications

General

Brand	Manitowoc
Model	777
Category	Construction Equipment
Language	English