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Ford Bronco V8 Thermactor Air Pump Emissions System Exploded Parts Diagram
Reference · 1966-1977 BroncoAll 140 exploded parts diagrams
Exploded parts diagram of the engine with air pump, accessory brackets, hoses, and fasteners labeled with Ford part numbers.
Part of 1966-1977 Ford Bronco Exploded Parts Diagrams
This is a Ford (FoMoCo) factory exploded-parts illustration (figure P-12150) showing the Thermactor air injection / emissions system on a V8 engine. The main drawing depicts the complete engine with carburetor, exhaust manifolds, and air hoses routed to both cylinder banks, identified by base part numbers 9F287, 9A487, and 9B466. Five lettered callouts (A-E) reference detail views. Detail A shows the air pump (9A485/9A486), pulley (9B447), mounting brackets (9B452, 9B450), adjusting arm (57494-S), fittings (9C475), and hardware such as bolts 57723-S, 57719-S, 383272-S, 351440-S, 376258-S, 58650-S, and nuts 355432-S, all with 'W/P/S' (with power steering) notation. Detail B shows check valve and hose components 9A487, 9C435, and clamp 386190-S. Detail D shows the alternate pump mounting for trucks without power steering (W/O P/S), including 375277-S and 6026. Detail E shows the air bypass/diverter valve assembly with parts 9B289, 9B290, 9E441, hoses 9B466, and clamps 8287. The footnote states the numbers are for reference use only, copyright FoMoCo. A reader can identify Ford base part numbers for every component and fastener in the emission air pump system, including differences between power-steering and non-power-steering installations.
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Frequently asked questions
- What part number is the Thermactor air pump on this diagram?
- The air pump is labeled 9A486 (with 'PART OF 9A486' noted for the attached fitting/elbow), with pulley 9B447 and fitting 9C475.
- Does the diagram show different mountings for power steering vs. non-power steering?
- Yes. Callout C/A shows the W/P/S (with power steering) mounting, and Callout D shows the W/O P/S (without power steering) mounting with brackets 9B450, 375277-S, and spacer 6026.
- What are the hose clamp part numbers shown?
- Clamps 8287 are shown on the hoses, plus clamp 386190-S (BB-898) on the check valve hose in Callout B.
- What part numbers make up the air bypass valve area in Callout E?
- Callout E shows 9B289, 9B290, 9E441, hoses 9B466, clamps 8287, and hose 9F287.
- What figure/reference number is this illustration?
- The illustration is marked P-12150, with the note 'Numbers for reference use only, COPYRIGHT FoMoCo'.
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