Chassis Documentation: Difference between revisions
Created page with "== Chassis Documentation == {| class="wikitable" |- | '''Status''' || VIN, GVWR, and wheelbase '''confirmed and cross-checked'''. Trans and axle codes '''pending chart decode'''. |} === VIN === <code>1FDXB70K4JVA01204</code> Decode: {| class="wikitable" |- ! Position !! Value !! Meaning |- | 1FD || USA / Ford / incomplete vehicle (chassis cab) |- | X || Restraint / GVWR class code |- | B70 || Chassis series — medium-duty |- | K || Engine code — 429 |- | 4 || Che..." |
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* [[Engine Identification]] | * [[Engine Identification]] | ||
* [[Fuel System]] | * [[Fuel System]] | ||
* [[ Bus_Specs_Start | The Original Specifications ]] | |||
Revision as of 17:12, 29 October 2026
Chassis Documentation
| Status | VIN, GVWR, and wheelbase confirmed and cross-checked. Trans and axle codes pending chart decode. |
VIN
1FDXB70K4JVA01204
Decode:
| Position | Value | Meaning |
|---|---|---|
| 1FD | USA / Ford / incomplete vehicle (chassis cab) | |
| X | Restraint / GVWR class code | |
| B70 | Chassis series — medium-duty | |
| K | Engine code — 429 | |
| 4 | Check digit | |
| J | Model year — 1988 | |
| V | Assembly plant — Kentucky Truck Plant (Louisville) | |
| A01204 | Sequential production number |
Title and insurance must read 1988 and match the VIN exactly. The incomplete-vehicle build date is October 1987; the body is March 1988. Title as an 88.
GVWR and weights
| Field | Value |
|---|---|
| GVWR | 28,000 lb |
| GAWR front | 9,000 lb — 265/75R22.5, 22.5x7.5 rims, 120 psi cold, single |
| GAWR rear | 19,220 lb — 265/75R22.5, 22.5x7.5 rims, 110 psi cold, dual |
Front and rear GAWR sum to 28,220 lb; GVWR is set 220 lb below the axle sum. Rear axle is a heavy full-floating medium-duty unit — good margin for the blower plan.
Check: confirm current tires are rated for 120 psi cold front. A lower load-range tire makes the label pressure wrong and over-tires the steer axle.
Buck tag
Firewall-mounted, adjacent to VIN and DSO tag. Ford format ("Vehicle manufactured by Ford Motor Company, Made in USA").
| Field | Value |
|---|---|
| Wheelbase | 275 (275 in)
|
| Type-GVW | B70280 (B70 series, 280 = 28,000 lb class)
|
| Body | 7
|
| Trans | AA — pending decode
|
| Axle | 2MN — pending decode
|
| DSO | blank — DSO on separate tag |
VIN on buck tag matches jamb label exactly. Verified character for character.
DSO tag
Firewall-mounted. Partially illegible.
| Field | Value |
|---|---|
| DSO | 74
|
| Special order | 3152
|
| Remainder | Illegible — not scrubbed, preserved as-is |
A DSO tag carrying a special order number is physical proof of a fleet special order. Match against the Marti invoice when it arrives.
Fleet special-order options
- Built-in traction sanders (hopper and dispenser — photograph mounting and frame attachment)
- Front tow hooks (factory option on B-series; photograph brackets)
Both point to a municipal or district fleet order, consistent with factory LPG.
Open items
AAtrans code — must resolve before the shop quotes. Build assumes C6; do not let a quote rest on that assumption.2MNaxle code — ratio drives cruise rpm at 28,000 lb and blower gearing. Check for a ratio tag on a differential cover bolt or the housing.- Both resolve via the Marti deluxe report.
Documentation
Photos filed: jamb label, buck tag, DSO tag, sander hopper and mounting, tow hook brackets.