7 BOLT TORQUE

CHECKING BOLT TORQUE

The tables shown below give correct torque values for various bolts and capscrews. Tighten all bolts to the torques specified in chart unless otherwise noted. Check tightness of bolts periodically, using bolt torque chart as a guide. Replace hardware with the same strength bolt.

ENGLISH TORQUE SPECIFICATIONS

Bolt

Diameter

"A"

1/4"

5/16"

3/8"

7/16"

1/2"

9/16"

5/8"

3/4"

7/8"

1"

SAE 2

(N.m) (lb-ft)

Bolt Torque*

SAE 5

(N.m) (lb-ft)

SAE 8

(N.m) (lb-ft)

61

95

128

225

8

13

27

41

230

345

45

60

95

165

6

10

20

30

170

225

110

155

215

390

12

25

45

72

570

850

80

115

160

290

9

19

33

53

420

630

17

36

63

100

155

220

305

540

880

1320

115

165

220

400

12

27

45

75

650

970

METRIC TORQUE SPECIFICATIONS

Bolt

Diameter

"A"

M3

M4

M5

M6

M8

M10

M12

M14

M16

M20

M24

M30

M36

8.8

Bolt Torque*

(N.m) (lb-ft)

10.9

(N.m) (lb-ft)

25

50

90

140

.5

3

6

10

225

435

750

1495

2600

.4

2.2

4

7

18

37

66

103

166

321

553

1103

1917

1.8

4.5

9

15

35

70

125

200

310

610

1050

2100

3675

1.3

3.3

7

11

26

52

92

148

229

450

774

1550

2710

Torque figures indicated above are valid for non-greased or non-oiled threads and heads unless otherwise specified. Therefore, do not grease or oil bolts or capscrews unless otherwise specified in this manual. When using locking elements, increase torque values by 5%.

* Torque value for bolts and capscrews are identified by their head markings.

95

8 INDEX

B

PAGE

Bolt Torque ....................................................95

I

Introduction .....................................................1

O

Operation Guidelines .....................................12

Air System ................................................28

Tanks ...................................................29

Break-In ....................................................14

Controls ....................................................16

End Gate ..................................................26

Hooking Up/Unhooking ............................23

Hooking Up .........................................23

Unhooking ...........................................25

Lift Cylinder ..............................................27

Loading/Unloading ...................................30

Optional Equipment ..................................38

Pre-Operation Vehicle Inspection

Procedure ............................................20

Terminology ..............................................13

To the New Operator or Owner ................12

Transporting .............................................35

Braking Guidelines ..............................36

Operating Instructions .........................35

Tires .....................................................37

S

PAGE

Safety ..............................................................2

General Safety ............................................3

Loading Safety ...........................................6

Maintenance Safety ....................................4

Operating Safety ........................................4

Safety Signs/Decals ...................................6

Sign-Off Form .............................................7

Tire Safety ..................................................6

Travel Safety ...............................................5

Unloading Safety ........................................5

Safety Sign (Decal) Locations .........................8

Service and Maintenance ..............................39

Periodic Maintenance and Adjustments ..54

Air Chamber/Spring Brake ..................77

Air System ..........................................85

Air System Functional ....................85

Air System Inspection ....................85

Axle Alignment ....................................57

Brakes .................................................67

Electrical System .................................86

Kingpin and Anchor Frame ..................56

Slack Adjuster .....................................70

Automatic Slack

Adjuster ..........................................70

Automatic Slack

Adjuster Maintenance ....................71

Suspension System .............................79

Air Ride Suspension .......................79

Spring Suspension .........................83

Suspension System Schematics ....84

Tires .....................................................65

Torque Specification Summary ...........54

Trailer ABS ...........................................78

Wheels .................................................63

Wheel Hubs/Bearings ..........................59

Service ......................................................39

Fluids and Lubricants ..........................39

Greasing ..............................................39

Service Record Summary (Lube) .........53

Servicing Intervals ...............................41

T

Trouble Shooting ...........................................87

96

MIDLAND MANUFACTURING LIMITED

BOX 249

ROSENORT, MANITOBA

CANADA, R0G 1W0

PHONE (204) 746-2348

TOLL FREE 1-800-827-7023

FAX (204) 746-2286

www.midlandtrailers.com

PRINTED IN CANADA

ISSUE DATE: JANUARY, 1998

REPRINT: JANUARY, 2014

PART NUMBER: 1900191

OPERATOR’S MANUAL