Revised: October 2005
OPERATING PROCEDURES
3 - 5RT700
Good judgement in the selection of gear range and
route of travel is essential when operating off the road.
Though designed primarily for use in off-road condi-
tions, there may be instances when highway travel is
necessary. In such instances, the crane is subject to
the same regulations which govern the operation of
other heavy equipment on public roads. Adequate
lighting, flares, flags and safety equipment should be
on the cranes at all times.
When operating on hard surfaces, use high range F4
thru F6 two-wheel drive only.Failure to do so may re-
sult in severe drive line “wind-up” and component fail-
ure.
The operator may start from rest in either forward or re-
verse in F4 or F2.
In addition to conditions of terrain, gear selection while
traveling is also determined by transmission tempera-
ture. Normal operating temperature is 160 to 200 deg.
F. If the transmission temperature rises above 250
deg. F. (121.1 deg. C.) while traveling, the crane must
be stopped and allowed to cool. Shift to neutral and run
the engine at 1000-1200 rpm. The temperature should
drop rapidly to the engine coolant temperature. If the
temperature does not drop, trouble is indicated, and
should be determined before moving again. Overheat-
ing generally occurs due to working in too high a gear
ratio. DO NOT SHUT OFF THE ENGINE WHEN THE
TRANSMISSION IS OVERHEATING.
NEVER SHIFT BETWEEN FORWARD AND
REVERSE WHILE THE CRANE IS IN MOTION.
Full power shifts under load may be made with- out en-
dangering the transmission or drive components. How-
ever, downshifts should not be made when the vehicle
speed exceeds the maximum speed of the next lower
range. Downshifting at excessive speeds will over-
speed the drive train components with possible result-
ant damage to the drive shafts.
Do not travel for extended periods at wide open throt-
tle.
Four wheel drive engagement is accomplished by a
solenoid shifted coupling in the transmissions. In the
ranges F1 thru F3 and R2 and R3.
Continuing to pull the block up after contact has been
made may result in damage to the boom head,
sheaves and anti-two block switch.
3. Check hydraulic outrigger beam retaining pins.
4. Disconnect the main pump if the crane is to be driv-
en more than approximately 2 miles.
5. Shift into high range (two wheel drive).
6. Check the tires for proper inflation pressure as indi-
cated on the “Crane Load Chart”.
7. Check that the rear wheels are centered and switch
to 2-wheel steer.
8. Adjust the seat and mirrors for clear vision to the
rear.
9. Check that the transmission oil pressure is within the
normal operating range of 240 to 300 psi with 180-
200° F oil temperature and engine at idle. Colder oil
and higher RPM may create pressures over 300
psi. Low pressure may indicate a worn charge
pump, clogged filter, or low oil level.
Never move the carrier if the transmission oil pressure
is below 240 psi. Low pressure will cause transmission
slippage and consequent premature failure of the
clutch packs.
MOVING THE CRANE TO A JOB SITE The proce-
dure for moving a crane is as follows:
1. Start the engine, following the procedure given in the
topic “Starting the Engine”.
2. Allow air pressure build-up.
3. Apply the swing brake.
4. Apply the swing lock.
5. Apply the Service Brake.
6. Release the Parking Brake.
7. Select the desired transmission range.
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