Catalog status
Active catalog
Air suspension
Parts / Navistar
55-1237
Published specs for 55-1237. Compare them with the air-suspension arm in hand, then ask about price, stock, or fit.
Technical record
Part numbers, specs, and how to ask about this part.
Use these published details to compare the air-suspension arm in hand and ask about the right part.
Position
Air suspension
Spring group
Air suspension
Spring stage
Single stage
Air suspension style
H type
Leaf count
2
Eye-to-mount length (La)
25-1/4"
Mount-to-end length (Lb)
18-1/2"
Vertical rise (C)
1-7/16"
Pivot eye diameter (Ø Eye)
2-1/2"
Width / thickness (W)
Width 3" · Thickness 3/8" × 2"
Part details
Part number and references.
Start here, then compare the air-suspension arm in hand.
- SRI number
- 55-1237
- Catalog status
- Active catalog
- OEM references
- 3544145C94 · 3544145C95 · 544145C96
These reference numbers help you check the listing. The guide below is only a general measuring guide for the air-suspension arm in hand.
Inquiry
Send this part page with details included.
Ask about price, stock, or fit for 55-1237. The email includes the page link and specs.
- Part number: 55-1237
- Catalog status: Active catalog
- Vehicle shown: Navistar (RH) 3544145C96
- Spring group: Air suspension
- Spring stage: Single stage
- Air suspension style: H type
- Email includes: page link, specs, reference numbers, and any load or weight details shown.
- More than one part? Add each one to the inquiry list and send them together.
Opens an email draft to [email protected] with the page link, status, and specs. Existing customers can keep going in customer login.
Measurement guide
Measure the air-suspension arm in hand.
Use this as a measuring guide for the air-suspension arm you removed. It is not a factory drawing for this part.
Selected diagram · Air suspension H-type diagram
Air suspension H-type diagram
Use this diagram as a measurement guide. Match the letters below against 55-1237. This is not a factory print.
La
Eye center to mounting centerline
Lb
Mounting centerline to arm end
C
Vertical rise from the pivot-eye datum
Ø Eye
Pivot eye diameter
W
Width across the arm or mount; confirm thickness from the material-size row
#L
Plate or leaf count in the arm assembly
- La Eye-to-mount length
- 25-1/4" Measure from the pivot eye center to the mounting centerline.
- Lb Mount-to-end length
- 18-1/2" Measure from the mounting centerline to the arm end or air-spring seat. Source length pair.
- C Vertical rise
- 1-7/16" Measure vertically from the pivot-eye datum line to the arm crown or mounting centerline.
- Ø Eye Pivot eye diameter
- 2-1/2" Check the pivot eye diameter before treating this arm as a match candidate.
- W Width / thickness
- Width 3" · Thickness 3/8" × 2" Match the Width value to the W callout across the arm or mount, then confirm the listed thickness on the removed arm.
- Leaf count
- 2 leaves Count the main plates or leaves in the arm assembly and compare the layout.
Before you send it
Check these basics first.
- Check this part number against the spring tag, old invoice, or service record for Navistar (RH) 3544145C96.
- Measure the length marks on the removed air-suspension arm: La / eye-to-mount length: 25-1/4"; Lb / mount-to-end length: 18-1/2".
- Check the hardware marks: Ø Eye / pivot eye diameter: 2-1/2".
- Confirm the secondary checks: C / vertical rise: 1-7/16"; W / width / thickness: Width 3" · Thickness 3/8" × 2"; leaf count: 2 leaves.
- Vehicle name and OEM numbers help narrow the search. They do not prove fit by themselves.