OPERATING CONTROLS AND PROCEDURES 777 OPERATOR’S MANUAL
3-26 Published 10-01-12, Control # 044-05 v2
PREPARING CRANE FOR OPERATION OPERATION
Engine Start-up
See engine manual for additional start-up instructions and
precautions.
1. If used, unplug or turn off engine block heater, engine oil
pan heater, hydraulic tank heaters and any other heaters
crane is equipped with.
NOTE: Manitowoc recommends the use of heaters
(engine, hydraulic tank, etc.) to aid start-up when
the ambient temperature will be 32°F (0°C) and
below.
2. Open hydraulic shut-off valves. (Figure 3-11).
WARNING
Read Capacity Charts!
Do not attempt to operate crane without first reading and
understanding capacity charts.
Crane must be rigged and operated according to
instructions given in capacity charts and rigging drawings.
Unless otherwise specified in capacity charts, all crane
operations must be performed with crane level to within
one percent of grade; otherwise, crane could tip.
Observe minimum block weight requirement given on
capacity charts.
Beware when operating in those areas of capacity chart
marked (b) — weight of backstay pendants can pull jib
against physical stops if load block or hook and weight
ball is not heavy enough. This action will result in sudden
unexpected movement of the load.
Make sure crawlers are blocked, if required per capacity
chart, prior to raising and lowering attachment. Read and
comply with instructions in Crawler Blocking Diagram in
Capacity Chart Manual.
Do not operate crane, to include raising boom from
ground level, if wind exceeds limits given in Capacity
Charts. Contact your local weather station for wind
velocity.
Failing to comply with capacity charts can result in tipping
or structural failure of boom/luffing jib.
Moving Load Hazard!
Operator must select proper operating mode prior to
operation.
Unexpected drum motion or improper limit responses can
result if wrong mode is selected.
Limit bypass switches must be in “activate” position and
all limits with which crane is equipped must be operational
before operating crane.
Avoid injuring personnel in operating area! Sound horn to
alert personnel that operation is about to begin.
CAUTION
Avoid Machinery Damage!
Before operating crane at start of each shift, perform
preventive maintenance checks and lubrication services
listed in your Operator’s Manual. Adjust operator’s seat
as shown in Figure 3-10.
Remove optional rear drum pressure roller for lift crane
operation. Rear drum pressure roller is required for duty-
cycle application only.
WARNING
Avoid injuring personnel or damaging crane and
property!
• Do not start engine if warning or out-of-order sign is
present at start controls.
• Check that all controls are off so crane and load do
not move when engine is started.
• Check that all personnel are clear of crane before
starting engine. Sound horn to alert personnel.
FIGURE 3-11
P432
Close
P433
Open
Latch allows
handle to be
locked in
open position
Front of
Hydraulic Tank
Close
Open
Supercharge
Filter Shut-off
Valve
Left Side of Engine
Hydraulic
Tank Shut-off
Valve
Padlock
Hole
Must Pull Latch
Up to Turn
Handle
To Next Page
Loading...
Need help?
General
