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378 Reference for continuing updates.
Hendrickson Trailer
Component Charts
Hendrickson Trailer HT Components
Air Springs
Air Spring Beam Assemblies
Air Springs
Part
No.
Hend.
No.
Top Plate
Stud/Hole
Qty.
Bottom Plate
Piston/Hole
Qty.
Top
Plate
Dia.
Piston
Dia.
Compressed
Height Model**
352-9270 S-20010 1 4 9.00 9.50 5.60 HS 230,HT 230 & HT 250US
352-9581 S-20414 1 4 9.00 9.50 7.30 HT 250U,HT 250US & HT 250U-Y
352-9640 S-20223 1 4 9.00 9.75 5.40 HS 190,HT 190T & HT 250US
352-8944 S-20217 1 4 9.00 11.06 7.30 HT 190U
352-9265 S-20124 1 4 9.00 11.06 7.30 HT 250T,HT 250US & HT 250U-Y
352-9299 S-20716 1 4 9.00 11.06 7.30 HT 250U & HT 250US
352-9265 S-20413 1 4 9.00 11.06 7.30 HT 250U,HT 250US & HT 250U-Y
352-9580 S-20127 1 4 10.38 10.75 7.30 HT 250U,HT 250US & HT 250U-Y
352-9367 S-14249 2 4 9.00 10.25 9.20 HT 250US
— S-26773 2 4 10.36 10.57 5.15 HT 230
352-8755 S-22045 2 4 10.38 8.43 7.30 HK 190T
352-8756 S-22046 2 4 10.38 9.38 7.30 HK 230
352-9122 S-3830 2 4 10.38 10.25 8.90 HT 300YB/U
352-5514 S-22173 2 4 11.31 10.25 8.90 HT 300U
352-9264 S-13122 2 4 11.31 10.25 10.10 HT 250 & HT 250US
352-8050 S-4771 2 4 11.31 11.50 5.80 HT 250US & HT 300T
— S-25319 2 4 11.38 11.13 7.87 HT 300US
352-8800 S-21208 3 4 9.00 9.50 5.60 HT 230
HK/HS/HT
Trailing Beam Assemblies
HK/HS/HT Model** Part No.* *Hend. No. Alignment Remarks**
HK 190T/230, HS 190T/230/300T & HT 230 SP 21736-1/-2 ALL 36 ¹³⁄₁₆ " OAL; Units w/ SURELOCK; HT 230 TA/TB-601
HS 190T/230/300T & HT 190T/230 338-1983 / 338-1984 20000-1/-2 ALL 32 ⁵⁄₈ " OAL; HT 230 All, Except TA/TB-522/601
HS/HT 300T 338-2010 / 338-2011 20186-1/-2 ALL 34 ⁹⁄₁₆" OAL; All Models
HT 190U 338-2417 / 338-2418 20200-1/-2 ALL All Except 6.75-001/002/003/020 & 9-007
SP 20333-1/-2 ALL 6.75-001/002/003/020
SP 20663-1/-2 ALL U-9-007
HT 230 SP 27614-1/-2 ALL HT 230TA/TB-522
HT 250T 338-2012 / 338-2013 20602-1/-2 ALL All Models
HT 250U SP 20338-1/-2 ALL U-7.5-021
SP 20338-3/-4 ALL U-9-020/021/023, UB-9-022 & U/UB-15-022
338-2060 / 338-2061 20335-1/-2 ALL All Not Listed Above
HT 250US 338-2233 / 338-2234 24186-1/-2 ALL All Models
HT 250U-Y 338-2081 / 338-2082 20131-1/-2 WELD
SP 21076-1/-2 WELD Units w/Shock Strap
HT 250YB SP 22350-1/-2 QUIK
SP 22350-3/-4 QUIK Units w/Shock Strap
HT 250YS SP 30873-1/-2 QUIK
HT 300U 338-2419 / 338-2420 20252-1/-2 ALL All Models
HT 300US 338-2421 / 338-2422 32426-1/-2 QUIK All Models
HT 300YB SP 31377-1/-2 QUIK
* Roadside/Curbside **Suspension I.D. Tag is located Front of the Roadside Hanger or Inside the Curbside Beam