3-6 07-03-19 Control # 091-09
CONTROLS AND OPERATING PROCEDURES OPERATOR MANUAL 600H SERIES
Operating the transmission with a sump temperature below
normal operating temperature is limited to:
• operating in the neutral gear or
• driving with an unloaded crane while not exceeding
1500 engine RPM and not exceeding half throttle.
Alternate Warm-up Procedures for Truck Mount (TM/
TMS) Cranes:
1. Setup the crane on outriggers.
2. Engage the transmission and allow crane to run at idle
until the temperature of the transmission sump reaches
normal operating temperature.
Hoist
Performing a warm-up procedure is recommended at every
startup and is required at ambient temperatures below 4°C
(40°F).
Warm-up Procedures:
1. Without operating the hoist function, warm the hydraulic
oil (see Hydraulic Oil System, page 3-6).
2. Once the hydraulic system is warm, operate the
unloaded hoist, in both directions, at low speeds several
times to prime all hydraulic lines with warm hydraulic oil
and to circulate gear lubricant through the planetary
gear sets.
Swing Drive and Turntable Bearing
Warm-up Procedures for Temperatures Above -7°C
(20°F):
1. Setup the crane on fully extended outriggers, with the
boom fully retracted and near maximum lift angle with no
load applied.
2. Rotate the superstructure at a speed of less than one
RPM for at least one complete revolution in one
direction, then rotate the superstructure at a speed of
less than one RPM for at least one complete revolution
in the opposite direction.
Warm-up Procedures for Temperatures Below -7°C
(20°F):
1. Ensure the boom is fully retracted and near maximum lift
angle with no load applied.
2. Rotate the superstructure at a speed of less than one-
half RPM for at least two complete revolutions in one
direction, then rotate the superstructure at a speed of
less than one-half RPM for at least two complete
revolutions in the opposite direction.
Axles
NOTE: For National Crane axle warm-up procedures, refer
to chassis manufacturer’s manual.
Hydraulic Oil System
Operating Limits and Warm-up Procedures:
• From 4°C to -10°C (40°F to 15°F): Crane operation
without
a load is allowed with medium engine RPM and
medium function speed (joystick position) until the fluid
reaches at least 10°C (50°F). It is then recommended
that all crane functions be cycled to remove cold fluid
from all components and cylinders of the hydraulic
system. If there is any unusual sound coming from the
crane’s hydraulic pumps or motors, stop the operation
and engine immediately and contact a National Crane
distributor.
• From 10°C to 4°C (50°F to 40°F): Crane operation with
a load is allowed with medium engine RPM and medium
function speed (joystick position) until the fluid reaches
at least 10°C (50°F).
• From 95°C to 10°C (200°F to 50°F): Crane operation
with a load is allowed with no restrictions.
• Above 95°C (200°F): No crane operation is allowed. Let
the crane’s hydraulic oil cool by running the engine at
idle with no functions actuated.
JUMP STARTING HAZARD
Do not attempt to jump start the crane.
All crane models, particularly those produced since 2000,
have multiple computer systems (crane control, RCL, engine
& transmission control) that are highly susceptible to voltage/
amperage surges in the electrical system.
The batteries should be completely disconnected from the
crane electrical system and charged using a battery charger
of appropriate voltage level or replace the batteries with fully
charged batteries. Refer to Charging the Battery, page 3-6.
CHARGING THE BATTERY
When charging the batteries, do not turn on the battery
charger until the charging leads have been connected to the
CAUTION
It is strongly recommended that the batteries not be
“jumped” with a different vehicle, portable power pack,
etc. The surge of power from these sources can
irreparably damage the various electronic controls and
computer systems. Jump starting the crane batteries with
a different vehicle while the engine is running can damage
the donor vehicle electronics as well if done improperly.
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