Catalog status
Active catalog
Air suspension
Parts / Navistar
55-1235
Published specs for 55-1235. 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 numbers and reference numbers.
Start here, then compare the air-suspension arm in hand.
- SRI number
- 55-1235
- Catalog status
- Active catalog
- OEM references
- 3544138C94 · 4C4Z5560FA
These reference numbers help you check the listing. The guide below is only a general measuring guide for the air-suspension arm in hand.
Cart or quote
Choose the right buying path.
Add this part to the cart. If it is ready now, checkout handles it. If APM needs to check it, we reply by email.
- Part number: 55-1235
- Catalog status: Active catalog
- Vehicle shown: Navistar (LH) 3544144C96
- Spring group: Air suspension
- Spring stage: Single stage
- Air suspension style: H type
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- Parts to check: APM keeps them in the cart and replies by email.
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Measurement guide
Measure the air-suspension arm in hand.
Use this as a field guide for the air-suspension arm you removed. It is not a factory print 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 55-1235. This is not a factory print.
FL
Full arm length reference shown on the diagram
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
Leaves
Plate or leaf count in the arm assembly; source field #L
- 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 the basics first.
- Check this part number against the spring tag, old invoice, or service record for Navistar (LH) 3544144C96.
- 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 narrow the search. They do not confirm fit by themselves.