New Holland Workmaster 50 Operator's Manual page 109

The following chart gives the load carrying capacity of the tires at the tire pressure indicated:
Tire
Size
141
kPa
(20.5
psi)
7.50 6 ply 500
-16
8 ply 500
(2WD)
9.5–24 6 ply 740
(4WD)
8 ply 740
Tire
Size
83 kPa
(12 p-
si)
8.3-24 6 ply 400
(FWD)
9.5-24 6 ply 500
(FWD)
Tire Size
12.5-18(FWD)
The above charts are for tractors operated at speeds up to 32 km/h (20 mph). Under front-end loader applications at
speeds up to 8 km/h (5 mph), the above loads may be increased by 50% maximum for the same inflation pressure.
6 - WORKING OPERATIONS
Front tire pressure and permissible loads
169 200 228
kPa kPa (2 kPa (3
(24.5 9 psi) 3 psi)
psi)
535 605 660
535 605 660
770 795 825
770 795 825
96.5 110 124
kPa (1 kPa (1 kPa (1
4 psi) 6 psi) 8 psi)
438 463 500
544 580 630
28 psi
10 ply 4435 lb
Cold Inflation Pressure - kPa (psi)
248 279 310
kPa (2 kPa kPa (4
6 psi) (40.5 5 psi)
psi)
Maximum load per tire - kg
-
695 745
695 745 790
855 880 915
855 880 915
Cold Inflation Pressure - kPa (psi)
138 152 165
kPa (2 kPa (2 kPa (2
0 psi) 2 psi) 4 psi)
Maximum load per tire - kg
-
531 558
671 712 748
Cold Inflation Pressure - psi
36 psi
Maximum load per tire - lb
5240 lb
6-25
341 372 400
kPa kPa (5 kPa (5
(49.5 4 psi) 8 psi)
psi)
- - -
830 870
— —
940
940 965 990
179 193 207
kPa (2 kPa (2 kPa (3
6 psi) 8 psi) 0 psi)
- - -
776 826 848
45 psi
6005 lb
421 448
kPa (6 kPa (6
1 psi) 5 psi)
-
— -
1015 1040
- -
- -
61 psi
7205 lb