McCulloch 966582001, ZM3816 BF manual Technical Data, Torque Specifications, Standard Hardware

TECHNICAL DATA

Torque Specifications

Engine crankshaft bolt	50 ft/lb (67 Nm)	Standard 5/16" fasteners	18 ft/lb (25 Nm)
Deck pulley bolts	150 ft/lb (203 Nm)	Standard 3/8" fasteners	33 ft/lb (44 Nm)
Lug nuts	75 ft/lb (100 Nm)	Standard 7/16" fasteners	52 ft/lb (70 Nm)
Blade bolt	90 ft/lb (122 Nm)	Standard ½” fasteners	80 ft/lb (110 Nm)
Standard ¼" fasteners	9 ft/lb (12 Nm)

HEX HEAD CAP SCREWS

The torque values shown should be used as a general guideline when specific torque values are not given.

U.S. Standard Hardware

Grade

thread)	ft./lbs
	¼
coarse	5/16
	3/8
fine or
	7/16
inches,	½
	/16
in	9
(Diameter	5/8
Size	¾
	7/8
Shank
	11/8

SAE Grade 5		SAE Grade 8		Flangelock Screw
				w/Flangelock Nut
ft./lbs	Nm	ft./lbs	Nm	ft./lbs	Nm
9	12	13	18
18	24	28	38	24	33
31	42	46	62	40	54
50	68	75	108
75	102	115	156
110	150	165	224
150	203	225	305
250	339	370	502
378	513	591	801
782	1060	1410	1912

** Grade 5 - Minimum commercial quality (lower quality not recommended)

Metric Standard Hardware

Grade

Shank Size (Diameter in millimeters, fine or coarse thread)

ft./lbs

M4

M5

M6

M7

M8

M10

M12

M14

M16

M18

M20

M22

M24

M27

Grade 8.8		Grade 10.9		Grade 12.9
ft./lbs	Nm	ft./lbs	Nm	ft./lbs	Nm
1.5	2	2.2	3	2.7	3.6
3	4	4.5	6	5.2	7
5.2	7	7.5	10	8.2	11
8.2	11	12	16	15	20
13.5	18	18.8	25	21.8	29
24	32	35.2	47	43.5	58
43.5	58	62.2	83	75	100
70.5	94	100	133	119	159
108	144	147	196	176	235
142	190	202	269	242	323
195	260	275	366	330	440
276	368	390	520	471	628
353	470	498	664	596	794
530	707	474	996	904	1205

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