Disassembly
Disassembly of throttle body unit for immersion in cleaning solvent requires removal of throttle body cover or fuel meter assembly, TPS and IAC assembly. Throttle valve screws are staked in position and should not be removed. Before working on throttle body assembly, it is essential that residual pressure be relieved before throttle body is removed. See FUEL PRESSURE RELIEF (GASOLINE) in this article.
| WARNING | Pressure regulator includes spring under heavy tension which may cause personal injury if released. DO NOT immerse cover in any type of cleaning solvent. |
Fuel Meter Assembly (Model 700)
Remove fuel meter-to-throttle body retaining screws. Remove fuel meter assembly. (Scheme 7) Discard gasket. If fuel pressure regulator cover is removed, regulator diaphragm must be replaced to prevent fuel leaks.
Scheme 7
Reassembly Throttle Body Cover (Model 220)
- Install new dust seal into recess of throttle body. Install fuel outlet passage gasket on cover. Install throttle body cover gasket on throttle body. Install cover, making sure that pressure regulator dust seal and cover gaskets are in place.
- Apply thread locking compound to cover attaching screws. Install cover screws and lock washers. Tighten screws. Connect electrical lead to fuel injector and install air cleaner.
Reassembly Fuel Meter Assembly (Model 700)
- Install new fuel meter-to-throttle body assembly gasket. Match cutout portions of gasket with openings in throttle body assembly.
- Place fuel meter assembly on throttle body. Install fuel meter-to-throttle body retaining screws and washers (screws should be coated with locking compound). Tighten screws to specification. See «TORQUE SPECIFICATIONS»(ref-10152-S13522269852001010200000) at end of article.
- Install new "O" rings on fuel lines. Using a back-up wrench on fuel fittings, tighten fuel line nuts to 20 ft. lbs. (27 N.m). To complete reassembly, reverse disassembly procedure.
Disassembly & Reassembly
- Disassembly procedure not supplied by manufacturer. (Scheme 8)-10 for exploded views.
- When reassembling, ensure pick-up assembly arm is correctly installed on pin. If not, arm can float and cause ignition timing to vary. To prevent corrosion, ensure terminals are lubricated with petroleum jelly before installation.
- To prevent heat damage, coat bottom of module and module rest pad in housing with silicone grease. Before installing roll pin in driven gear, ensure timing mark on roll pin and rotor tip align. (Scheme 8)-10.
