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Cummins V/VT 378, 504 and 555 Torque Specifications
Pipe Plug Torque Specs. |
Size |
ft-lb |
N-m |
1/8 |
5-7 |
7-9 |
1/4 |
15-20 |
20-27 |
3/8 |
20-25 |
27-34 |
1/2 |
20-25 |
27-34 |
3/4 |
25-30 |
34-41 |
1 inch. |
40-45 |
54-61 |
Side Capscrews |
Torque |
ft-lb |
N-m |
1. Tighten to |
35-40 |
47-54 |
1. Tighten to |
100-110 |
136-149 |
|
Plate Capscrew Torque |
ft-lb |
N-m |
|
20-23 |
27-31 |
Main Bearing Capscrews |
Torque Sequence |
ft-lb |
N-m |
1. Tighten to |
55-65 |
75-88 |
2. Advance to |
115-125 |
156-170 |
3.Advance to |
165-175 |
224-237 |
4. Loosen |
All |
5. Repeat Steps |
1,2 and 3 |
|
V-378 & V-504 Cyl. Head Capscrew Torque |
ft-lb |
N-m |
*1. Tighten to |
80-90 |
108-122 |
*2. Tighten to |
110-115 |
149-156 |
Cylinder Head Plug Specs. |
Size |
ft-lb |
N-m |
1/8 |
5-10 |
7-14 |
Fuse
Plug |
5-10 |
7-14 |
3/8 |
35-45 |
47-61 |
1/2 |
60-70 |
81-95 |
3/4 |
65-75 |
88-102 |
1
inch. |
135-145 |
183-197 |
Connecting Rod Nut |
Torque Sequence V/VT 555 |
ft-lb |
N-m |
1. Tighten to |
40-45 |
54-61 |
2. Advance to |
85-90 |
115-122 |
3. Loosen |
All |
4. Tighten to |
40-45 |
54-61 |
5. Advance |
60° in 30° increments |
Connecting Rod Nut |
Torque Sequence V 378,504 |
ft-lb |
N-m |
1. Tighten to |
20-25 |
27-34 |
2. Advance to |
50-55 |
68-75 |
3. Loosen |
All |
4. Tighten to |
20-25 |
27-34 |
5. Advance |
60° in 30° increments |
|
V-555 Cyl. Head Capscrew Torque |
ft-lb |
N-m |
*1. Tighten to |
25-30 |
34-41 |
*2. Tighten to |
80-90 |
108-122 |
*3. Tighten to |
135-140 |
183-190 |
* Follow Sequence Below
Cylinder Head Tightening Sequence - V6
* Follow Sequence Below
Cylinder Head Tightening Sequence - V8
Note: The capscrews securing the rocker lever assembly are part of the cylinder heads capscrews.
Capscrew Markings & Torque Values |
Capscrew Body Size |
SAE 1 or 2 |
SAE 5 |
SAE 6 or 7 |
SAE 8 |
Ft-lb [N-m] |
Ft-lb [N-m] |
Ft-lb [N-m] |
Ft-lb [N-m] |
1/4-20 |
5 [7] |
8 [11] |
10 [14] |
12 [16] |
1/4-28 |
6 [8] |
10 [14] |
|
14 [19] |
5/16-18 |
11 [15] |
17 [23] |
19 [26] |
24 [33] |
5/16-24 |
13 [18] |
19 [26] |
|
27 [37] |
3/8-16 |
18 [24] |
31 [42] |
34 [46] |
44 [60] |
3/8-24 |
20 [27] |
35 [47] |
|
49 [66] |
7/16-14 |
28 [38] |
49 [66] |
55 [75] |
70 [95] |
7/16-20 |
30 [41] |
55 [75] |
|
78 [106] |
1/2-13 |
39 [53] |
75 [102] |
85 [115] |
105 [142] |
1/2-20 |
41 [56] |
85 [115] |
|
120 [163] |
9/16-12 |
51 [69] |
110 [149] |
120 [163] |
155 [210] |
9/16-18 |
55 [75] |
120 [163] |
|
170 [231] |
5/8-11 |
83 [113] |
150 [203] |
167 [226] |
210 [285] |
5/8-18 |
95 [129] |
170 [231] |
|
240 [325] |
3/4-10 |
105 [142] |
270 [366] |
280 [380] |
375 [508] |
3/4-16 |
115 [156] |
295 [400] |
|
420 [569] |
7/8-9 |
160 [217] |
395 [536] |
440 [597] |
605 [820] |
7/8-14 |
175 [237] |
435 [590] |
|
675 [915] |
1-8 |
235 [319] |
590 [800] |
660 [895] |
910 [1234] |
1-14 |
250 [339] |
660 [895] |
|
990 [1342] |