S7128 Natural Rubber Air Spring/1R14-025 Air Suspension Spring
Parts For OEM Piston Steel W01-358-9156 11 10.5-21 A 370
OEM Numbers
Contitech
11 10.5-21 A 370
HENDRICKSON TRAILER
S7128
Firestone
W01-358-9156 1T19L-11/F-11
PEERLESS
0550-00080
Goodyear
1R14-019 1R14-025
Product Drawing
Technical Data
Bolt or stud 1/2"-13 UNC Blind nut for bead plates 3/8-16 UNC; for pistons 1/2"-13 UNC Air inlet 1/4 " - 18 N.P.T. Combination air inlet & stud; stud outside thread 3/4"-16, stud
inside thread for air inlet 1/4" - 18 N.P.T.
Air Spring Compressed Height
8.8 in.
Air Spring Type
1T Reversible Sleeve
Diameter
10.62 in.
Maximum Height
27.3 in.
Piston Height
7 in.
Bead Plate Top Diameter
11.31 in.
Top Mount
flat
Bottom Stud Configuration
4
Bottom Mount
flat
Top Stud Configuration
5
Bead Plate Bottom Diameter
10.3 in.
Application
City Welding, Peerless 0550-00080, Hendrickson Trailer S7128
Assembled Product Weight (lb)
24.4
Bellows
1T19L-11
Design Height (in.)
14.5-18.5
Loading Capacity at 20 psig
1,760 lbsf
Loading Capacity at 60 psig
5,280 lbsf
Loading Capacity at 90 psig
7,920 lbsf
Maximum Diameter
13.7
Minimum Jounce Height (in.)
8.88
Natural Frequency
Hz
Operating Temperature (Deg C)
57 to -54
Maintenance of the air springs, Vehicle Check-List
Check the air lines and devices of leakage and that
they turns freely.
Check the bellows bearing for damage, correct
fastening, deformation, sharp edges.
Check the shock absorbers for operation and
impermeability as well as tightness and bearing.
Periodically, check nuts and bolts for proper torque.
For specific recommendations see manufacturer's manual.
Check axle suspension, trailing arms and rods for wear.
Check height control valve to see that it is functioning
properly. A properly maintained valve will save unneeded maintenanceexpense.
Routine inspection of all of the above according to
manufacturer's instructions, will extend the life of your vehicle and reduce
your overall maintenance expense.
Air Spring Installation
Before you start installing air springs, make sure you have
all the necessary tools and equipment to perform the repair
safely.
Familiarize yourself with the suspension on which you are
performing the repair by reviewing the manufacturers
service guide.
If you are in doubt about something, ask for assistance from
a qualified suspension specialist, the suspension
manufacturer or the air spring manufacturer; This can save you
a lot of time and aggravation later in the job.
Important tips to remember when installing a new unit
Check levelling valve, linkage and transmission parts for wear
and damage and if necessary replace the damaged parts.
Check that the shock absorber for leakages and take a shock
absorber test. A defective shock absorber must be replaced.
Once the air lines are disconnected, check their entire length
for cracks or other damage. Replace worn parts.
With the air spring removed, other parts of the air
suspension become more accessible. Check for wear or
damage of the frame hangers, trailing arm bushings, torque
rods, the trailing arms and the air spring mounts. When it is
necessary, also replace parts.
Check bearing for air spring bellow for external
damage, deformation, sharp edges and correct fastening.
Before installing the new unit, clean the air spring
mounting plates to ensure proper attachment to the suspension.
Always use new attaching bolts for the installation
and observe the tightening torques. Never use old
bolts, because these can fall out.
Check the linkage of the levelling valve to see that it
is functioning properly. Under load, the linkage should
move from the neutral position up to the intake position. This
lets air into the springs, which brings the arm back to the
neutral position. This lets air into the springs, which brings
the arm back to the neutral position. That opens the
exhaust valve, allowing air to escape until the arm returns to
the neutral position. Then check the driving level.