Jacobsen R311T-T4I, Safety, Operation And Maintenance Manual

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5 OPERATION
en-30
5.8 HILLSIDE OPERATION _____________________________________________________
The mower has been designed for good traction and
stability under normal mowing conditions; however, use
caution when operating on slopes, especially over rough
terrain, or when the grass is wet. Wet grass reduces
traction and steering control.
1. Always mow with the engine at full throttle but reduce
forward speed for safe operation.
2. If the mower tends to slide or the tires begin to
“mark” the turf, angle mower into a less steep grade
until traction is regained or tire marking stops.
3. If mower continues to slide or mark the turf, the
grade is too steep for safe operation. Do not make
another attempt to climb, back down slowly.
4. When descending a steep slope, always lower
implements to the ground to reduce the risk of
mower overturning.
5. Correct tire pressure is essential for maximum
traction.
Front - 16 to 20 psi (1.10 to 1.38 BAR)
Rear - 10 to 12 psi (0.69 to 0.83 BAR)
6. If additional traction is required, adjust the weight
transfer knob as described in
Section 8.13 .
Figure 5B
Figure 5C
WARNING
To minimize the possibility of overturning, the safest
method for operating on hills and terraces is to travel
up and down the face of the slope (vertically), not
across the face (horizontally). Avoid unnecessary
turns, travel at reduced speeds, stay alert for hidden
hazards, and drop offs.
CAUTION
Do not operate this mower on slopes greater than 16°
angle or 29% grade.
!
!
16°
29%
Maximum
16°
29%
Maximum
0°
Degrees are shown to nearest 1/4°
General Slope of Roadway Embankment - 45°
Steepest Grass Area - 31°
Slope of Average Roof - 19-1/4°
2nd Class Highway Maximum Grade - 4-1/2°
Toll Road or Freeway - 1-3/4°
0%
2-3/4°
5%
5-3/4°
10%
8-1/2°
15%
11-1/4°
20%
14°
25%
16-3/4°
30%
19-1/4°
35%
21-3/
4°
40%
24-1/
4°
45%
26-1/2°
50%
28-3/4°
55%
31°
60%
33°
65%
35°
70%
36-3/4°
75%
38-3/4°
80%
40-1/4°
85%
42°
90%
43-1/2°
95%
45°
100%
Deg
rees
Gr
ade