| Component | Torque (ft-lb) | Torque (Nm) |
| Quick-Align pivot bolt connection fabricated type | 505-595 | 685-807 |
| Quick-Align pivot bolt connection parabolic type | 410-445 | 550-600 |
| Shock Absorber Bolts | 315 | 425 |
| U-Bolt Nuts | 445-480 | 600-650 |
| Upper Air Spring Nuts | 44-52 | 60-70 |
| Lower Air Spring Nuts | 170-185 | 230-250 |
| Brake Chamber Mounting Nuts | 100-110 | 136-149 |
| S-Cam Support Bearing Mounting Nut | 35-45 | 47-61 |
| Check Condition of Airbags Weekly | ||
| Check Trailing Arms for stress cracks Monthly |
| Component | Torque (ft-lb) | Torque (Nm) |
| Quick-Align pivot bolt (M24x3P, 8.8) | 442 | 600 |
| Shock Absorber Bolts (M14x2P, 8.8) | 84 | 115 |
| U-Bolt Nuts (5/8″UNF, Grade 8) | 120 | 163 |
| Upper Air Spring Nuts (3/4″UNC, Grade 5) | 100 | 135 |
| Lower Air Spring Nuts (3/8″UNC, Grade 5) | 26 | 35 |
| Lower Air Sping Bracket Bolt (M10x1.5P, 10.9) | 48 | 65 |
| Brake Chamber Mounting Nut | 100-110 | 136-149 |
| S-Cam Support Bearing Mounting Nut | 35-45 | 47-61 |
| Check Condition of Airbags Weekly | ||
| Check Trailing Arms for stress cracks Monthly |
Check torque values after ‘Break In’period of approximately 1000 to 3000 miles (1600 to 4800Km) and annually thereafter.
| Component | Torque (ft-lb) | Torque (Nm) |
| Quick-Align pivot bolt (M24x3P, 8.8) | 442 | 600 |
| Shock Absorber Bolts (M14x2P, 8.8) | 84 | 115 |
| U-Bolt Nuts (5/8″UNF, Grade 8) | 120 | 163 |
| Upper Air Spring Nuts (3/4″UNC, Grade 5) | 26 | 35 |
| Lower Air Spring Nuts (3/8″UNC, Grade 5) | 26 | 35 |
| Lower Air Sping Bracket Bolt (M10x1.5P, 10.9) | 48 | 65 |
| Brake Chamber Mounting Nut | 100-110 | 136-149 |
| S-Cam Support Bearing Mounting Nut | 35-45 | 47-61 |
| Check Condition of Airbags Weekly | ||
| Check Trailing Arms for stress cracks Monthly |
Check torque values after ‘Break In’period of approximately 1000 to 3000 miles (1600 to 4800Km) and annually thereafter.
| Component | Torque (ft-lb) | Torque (Nm) |
| U-Bolt Nuts | 368-398 | 500-540 |
| Torque Arm Nuts, 1″ | 406-443 | 190-220 |
| Adjustable Torque Arm Clamp Nuts, 5/8″ | 295-310 | 170-205 |
| Equalizer Bolt, 1″ | 443-480 | 545-610 |
| Retainer Bolt Nuts, 1/2″ | 44-52 | 95-110 |
| Check Wheel Nuts Torque Settings | 450-500 | 610-678 |
| Check Outer Axle Nut Torque | 315-385 | 427-521 |
| Check Grease Cap for Tension | ||
| Check Bearing Grease every 12 Months |
Check torque values after ‘Break In’period of approximately 1000 to 3000 miles (1600 to 4800Km) and annually thereafter.
| Component | Torque (ft-lb) | Torque (Nm) |
| U-Bolt Nuts (5/8″ UNF, Grade 8) | 120 | 163 |
| Leaf Spring Eye Bolt (M20x2.5P, 8.8) | 265 | 360 |
| Rocker Hanger Bolt (M30x3.5P, 8.8) | 885 | 1200 |
| Rear Hanger Bolt Nuts (M16x2P, 8.8) | 7.5 | 10 |
| Check Wheel Nuts Torque Settings | 450-500 | 610-678 |
| Check Outer Axle Nut Torque | 315-385 | 427-521 |
| Check Grease Cap for Tension | ||
| Check Bearing Grease every 12 Months |
Check torque values after ‘Break In’period of approximately 1000 to 3000 miles (1600 to 4800Km) and annually thereafter.
| Component | Torque (ft-lb) | Torque (Nm) |
| U-Bolt Nuts (5/8″UNF, Grade 8) | 120 | 163 |
| Leaf Spring Eye Bolt (M20x2.5P, 8.8) | 265 | 360 |
| Rocker Hanger Bolt (M24x3.5P, 8.8) | 442 | 600 |
| Rear Hanger Bolt Nuts (M16x2P, 8.8) | 7.5 | 10 |
| Check Wheel Nuts Torque Settings | 90 | 122 |
| Check Outer Axle Nut Torque | 315-385 | 427-521 |
| Check Grease Cap for Tension | ||
| Check Bearing Grease every 12 Months |
Check torque values after ‘Break In’period of approximately 1000 to 3000 miles (1600 to 4800Km) and annually thereafter.
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ATM and GTM
The maximum weight of a trailer is specified as either its Aggregate Trailer Mass (ATM) or Gross Trailer Mass (GTM).
ATM is the combined weight of the trailer and its full load when it is not coupled to a tow vehicle. GTM is the weight of the fully loaded trailer that is imposed o the trailers axle when it is coupled to the tow vehicle. GTM will always be less than ATM as some of the trailer weight is transferred to the tow vehicle when the trailer is coupled to it.
All new vehicles built since August 1989 are required to have a plate listing, amongst other things, the trailers Aggregate Trailer Mass, although some trailer plates will also show its Tare weight (the unladen weight of the trailer) and its GTM.
You must ensure the towing vehicle has sufficient capacity to tow the trailer when it is fully laden.
GCVM
Gross Combination Vehicle Mass (where given) is the maximum allowable weight of the trailer, tow vehicle and the load in the tow vehicle and trailer (including passengers).
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