CRANE INSTALLATION 1300A
9-6 01-22-2019 Control # 051-08
Pump Rotation
The three section hydraulic pump that is installed in a 1300A
application must be the correct pump rotation configuration
for the PTO. Verify the direction the PTO output shaft rotates
before selecting a clockwise (CW) or counter-clockwise
(CCW) rotation hydraulic pump (Figure 9-3). Both CW or
CCW rotation pumps are available, and are marked clearly
with a directional arrow on the pump housing.
TRUCK FRAME STRENGTH
For a truck frame to be suitable for a Series 1300A crane, the
truck frame must:
• be rigid enough to allow excessive boom movement due
to truck frame deflection when lifting over the front of the
unit.
• be strong enough to resist the loading induced by the
crane.
• not permanently bend or deform.
The Section Modulus (S.M.), which determines the rigidity of
the frame, is a measurement of the area of the truck frame.
Resistance to bending moment (RBM) is a measurement of
strength and is determined by multiplying the section
modulus of each frame rail by the yield strength of the rail
material.
The 1300A Series require a minimum of 3,300,000 in-lb
(372,850 N·m) RBM and 30 in
3
(492 cm
3
) S.M. from the rear
of the truck frame to the front of the front outrigger boxes.
The truck frame strength required from the front of the
outrigger boxes to the front stabilizer attachment point is
variable and is listed in the table below. Most truck frames
have reduced section properties through the front
suspension due to truck frame cut outs or because outer
channel reinforcement stops short of the front suspension. In
these cases it is imperative that the truck frame is measured
and the section modulus is calculated and compared to the
table below to ensure adequate strength exists for front
stabilizer loading.
CAUTION
Rotating the pump in the wrong direction damages the
pump.
Distance From
Stabilizer Attachment
Inches (centimeters)
Section
Modulus Per
Rail in.
3
(cm
3
)
0 - 12 (0 - 30) 2.7 (44)
12 - 24 (30 - 61) 5.5 (90)
24 - 36 (61 - 91) 8.2 (134)
36 - 48 (91 - 121) 11.0 (180)
48 - 60 (121 - 152) 13.7 (224)
60 - 72 (152 - 182) 16.5 (270)
72 - 84 (182 - 213) 19.2 (315)
84 - 96 (213 - 243) 21.9 (359)
96 - 108 (243 - 274) 24.7 (405)
108 - 120 (274 - 304) 27.4 (449)
120+ (304 +) 30.0 (492)
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