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Body and Implement Mounting Guidelines U500 North America
Code
Tire
R34
395/85 R20 XZL
R40
315/80 R22.5 XDN
R41
385/65 R22.5 XZY
R42
445/65 R22.5 AC70
R42
445/65 R22.5 XZL
R61
445/70 R24 XM47
Table 4.3:Statically (loaded) tire radius
h
α
=
f
⇒
α
=
sin
arcsin
l
=
+
h
h
r
s
cog
Equation for lifted front axle:
−
Q
RAW
l
=
h
*
RAW
*
s
h
GVW
f
Alternative equation for lifted front axle using the angle α:
−
Q
RAW
=
RAW
h
*
l
*
s
GVW
Equation for lifted rear axle:
−
Q
FAW
l
=
h
*
FAW
*
s
h
GVW
f
Alternative equation for lifted rear axle using the angle α:
−
Q
FAW
=
FAW
h
*
l
*
s
GVW
Page 74 of
294
r
stat
21.34 in
542 mm
19.88 in
505 mm
19.65 in
499 mm
21.22 in
539 mm
21.18 in
538 mm
22.36 in
568 mm
h
f
Equation 4.4
l
Equation 4.5
stat
2
−
2
+
l
h
r
Equation 4.6
f
stat
1
+
r
Equation 4.7
( )
α
stat
tan
2
−
2
+
l
h
r
Equation 4.8
f
stat
1
+
r
Equation 4.9
( )
α
stat
tan
Example:
Calculation of the center of gravity height
Q
=
10,271 lbs
FAW
GVW
=
19,200 lbs
FAW
=
9,000 lbs
h
=
45 in
f
r
=
21.34 in (tire size: 395/85 R20)
stat
l
=
131.89 in
Note: Rear axle is lifted up.
−
l
Q
FAW
=
FAW
h
*
*
s
h
GVW
f
−
131
.
89
in
10
,
271
lbs
, 9
000
=
h
*
s
45
in
19
,
200
lbs
=
h
45
.
39
in
s
Caution:
Practical determination of the center of gravity
height may only be carried out by experienced
personnel using suitable lifting facilities.
Implement / Body Installation
2
−
2
+
l
h
r
f
stat
lbs
2
−
2
+
*
(
131
.
89
in
)
(
45
in
)
21
.
34
August 2005
in
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