Ford 3930 - Page 115

---------------SECTION C
ROAD SPEEDS (Constant Mesh Transmi~ion - continued)
The following charts show the road speeds in MPH and km/h for 4630 and 5030 tractors with Constant
Mesh transmission, fitted with
12.4- 32 or 14.9 - 28 rear tires (these two tire sizes have the same rolling
radius).
If the rear tires of your tractor are of a different size, multiply the road speeds shown in the printed
charts
by the following conversion factors:
Tire size: 12.4 - 28 12.4 - 36 13.6 - 28 13.6 - 36 14.9 - 24 14..9 - 30
Faetor: 0.922 1.078
0.953 1.117 0.922 1.039
Tire sl7.e:
Factor:
16.9-24
0.969
16.9-30
1.086
16.9-34
1.164
18A-26
1.047
18A-30
1.125
NOTE: For your convenience, the right-hand side of each chart has been left blank._so,.shouldyour
tractor have rear tires of a different size, you may insert your own calculated Foad speeds.
Ford 4630 and 5030 with Constant Mesh transmission and 12.4 - 32 or 14.9 - 28 rear tires
Miles
per hour
Miles
per hour
Engine Speed (rev/min)
Engine Speed (rev/min)
Gear
1200
1800
2200
1200 1800
2200
1
0.79 1.18
1.45
2
0.98 1.48
1.80
3
1.73
2.59
3.17
4
2.35
3.52
4.31
4
2.81
4.23 5.16
6 3.52 5.28
6.44
7
6.17
9.25
11.31
8 8.40
12.60
15.40
Low Reverse
1.13
1.70
2.08
High Rev~rse
4.05
6.08
7.43
Ford 4630 and 5030 with Constant Mesh transmission and 12.4 - 32 or 14.9 - 28 rear tires
Kilometers
per hour
Kilometers per hour
Engine Speed (rev/min) Engine Speed (rev/min)
Gear 1200 1800
2200
1200
1800 2200
1
1.27 1.90
2.33
2
1.58 2.38 2.90
3
2.78
4;17
5.lO
4
3.78
5.67
6.94
4
4.53
6.80
8..il
6
5.66 8.49
10.37
7
9.93 14.89
18.20
8
13.52
20.28
24.78
Low Reverse
1.82
2.74
3.34
High Reverse
6.52
9.78
11.95
17