RT700E OPERATOR’S MANUAL
OPERATING CONTROLS AND PROCEDURES
steer control valve to allow the operator to safely steer the crane to a safe stop. The LOW STEER PRESSURE (PRESS) indicator comes on during pressure drops. This indicates the secondary steering system should also be working.
throttle until maximum first gear speed is attained and shift into the second (2) gear position. 4.
Repeat the above procedure for the third (3) gear position until the desired travel speed is attained.
CAUTION Do not downshift to a lower gear if the road speed is greater than the maximum speed of the lower gear.
Traveling - Reverse 6402-1 Front-Wheel
Rear Wheel
Traveling in reverse is accomplished the same way as traveling forward, except for shifting the transmission shift lever to reverse (R) position and rotating the knob to the 1, 2, and 3 positions. (Refer to TRAVELING - FORWARD.)
CAUTION Apply service brakes and bring crane to a complete stop before shifting transmission into reverse.
6402-2 Four-Wheel
Four-Wheel Drive Operation
Crabbing
FIGURE 3-4
Crabbing Crabbing is accomplished with the steering wheel and the REAR STEER control switch. Depending upon which direction the operator wishes to travel (crab), the steering wheel is turned in the same direction as the REAR STEER control switch. This permits driving the crane forward or backward in a crabbing manner
Traveling - Forward
If more traction is required due to slipping or spinning wheels, engage the front axle drive as follows:
CAUTION Before shifting from two-wheel drive to four wheel drive (or from four back to two), crane travel must be stopped. 1.
Position the DRIVE AXLE selector switch to 4WD LO.
2.
Select gear speed and direction of travel.
3.
Return the DRIVE AXLE selector switch to the 2WD HI position as soon as two-wheel traction will suffice.
CAUTION Engage the swing lock pin for extended travel.
Travel On Slopes
1.
After the engine has warmed up, position the transmission shift lever from neutral (N) to forward (F) position.
Observe the following when operating a crane on a slope: •
The slope -- side to side or fore and aft -- must not exceed 15% (8.5 degrees).
Position the DRIVE AXLE switch to either 2WD-HI or 4WD-LO.
•
Travel must be on an improved surface or on hardpacked dry earth having a minimum 0.5 coefficient of adhesion.
CAUTION
•
Travel must be limited to a forward direction only.
Use four wheel drive only when more traction is required.
•
Travel must not exceed a speed of 1 mph.
•
All boom sections must be fully retracted.
•
The boom extension must be in the stowed position or removed from the crane.
•
The boom must be lowered to horizontal and positioned over the front of the crane.
2.
NOTE: 3.
If service brake hydraulic accumulator pressure is low, the parking brake cannot be released.
Put the transmission shift lever knob to the first (1) gear position and release the parking brake. Depress the foot
Published 05-23-08 Control # 072-05
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