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S7128 Natural Rubber Air Spring/1R14-025 Air Suspension Spring Parts For OEM Piston Steel W01-358-9156 11 10.5-21 A 370

Minimum Order Quantity : 10 Pieces Price : $1.00 - $50.00/Pieces
Packaging Details : CARTON/PALLET Supply Ability : 2000000pcs/Year
Place of Origin: Guangdong, China Brand Name: VKNTECH
Certification: IATF16949/ISO9000 Model Number: 1K9156

Detail Information

OE NO.: 11 10.5-21 A 370 Material: Imported Natrul Rubber
Type Of Goods: Air Spring/Air Bags/Air Ballons Car Model: For Bus/truck&trailer
Warranty: 12 Months Type: By Sea / By Air / By Truck
Price Condition: FOB China Sample: Available
Operation: Gas-filled Brand: VKNTECH Or Customized
Service Offered: OEM Suspension System: Air Spring Suspension
Package: Standard Packing Or Customized Payment Term: T/T&L/C
Port: Guangzhou

Product Description

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
PEERLESS 0550-00080
Goodyear 1R14-019





Product Drawing



S7128 Natural Rubber Air Spring/1R14-025 Air Suspension Spring Parts For OEM Piston Steel W01-358-9156 11 10.5-21 A 370 1




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 maintenance expense.
  •  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

  1. Before you start installing air springs, make sure you have all the necessary tools and equipment to perform the repair safely.
  2. Familiarize yourself with the suspension on which you are performing the repair by reviewing the manufacturers service guide.
  3. 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.



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