4-8
F-844-0117
MAINTENANCE AND LUBRICATION
Suspension Maintenance
Air Ride Suspension
See Figures 4-3 and 4-4
for Tandem Axle and Tandem
Axle w/ Flip Axle Air Ride Suspension drawings.
1.
Physically check all nuts, bolts, and air line fittings for
proper torque
*
Air Spring Connections Only.
**
First number listed is torque required if bolt head
designated with Neway; Second number listed is torque
required if bolt head designated with Holland Neway.
2.
Check all other suspension components for any sign
of damage, looseness, wear or cracks.
3.
With trailer on level surface and air pressure in
excess of 65 psi, all air springs should be of equal
firmness. The height control valve on right side of
front axle controls all air springs on tandem axle
suspensions.
4.
The height control valve on right side of center axle
controls ride height for all air springs on triple axle
suspension.
Table 4-4: Air Suspension Torque Chart
Figure 4-3: Tandem Axle Air Ride Suspension System
AIR SUSPENSION TORQUE CHART
SIZE
1-1/8”-7
1/2”-13
*
3/4”-16
3/4”-10
TORQUE
IN FT.
LBS
**
800
OR
550
35
35
150
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