446B Backhoe Loader Caterpillar

The following tables show general torques for bolts, for nuts, and for taperlock studs. The components have a rating of at least SAE Grade 5.

Table 1

Torques for Bolts and for Nuts
Thread Size	Standard Torque
	N·m	lb ft
1/4 inch	12 ± 3	9 ± 2
5/16 inch	25 ± 6	18 ± 4.5
3/8 inch	47 ± 9	35 ± 7
7/16 inch	70 ± 15	50 ± 11
1/2 inch	105 ± 20	75 ± 15
9/16 inch	160 ± 30	120 ± 20
5/8 inch	215 ± 40	160 ± 30
3/4 inch	370 ± 50	275 ± 37
7/8 inch	620 ± 80	460 ± 60
1 inch	900 ± 100	660 ± 75
1 1/8 inch	1300 ± 150	950 ± 100
1 1/4 inch	1800 ± 200	1325 ± 150
1 3/8 inch	2400 ± 300	1800 ± 225
1 1/2 inch	3100 ± 350	2300 ± 250

Table 2

Torques for Taperlock Studs
Thread Size	Standard Torque
	N·m	lb ft
1/4 inch	8 ± 3	6 ± 2
5/16 inch	17 ± 5	13 ± 4
3/8 inch	35 ± 5	26 ± 4
7/16 inch	45 ± 10	33 ± 7
1/2 inch	65 ± 10	48 ± 7
5/8 inch	110 ± 20	80 ± 15
3/4 inch	170 ± 30	125 ± 22
7/8 inch	260 ± 40	190 ± 30
1 inch	400 ± 60	300 ± 45
1 1/8 inch	525 ± 60	385 ± 45
1 1/4 inch	750 ± 80	550 ± 60
1 3/8 inch	950 ± 125	700 ± 90
1 1/2 inch	1200 ±150	885 ±110