Description

AMC O. & V. B. A 703, 903 Parts Catalog

You are halfway through a stabilizer jack replacement on a 703 or 903 crane, and the part number is worn off. Without the factory parts catalog, you waste hours chasing the wrong component. This 117-page document kills that guesswork. Every table in this catalog corresponds to a specific assembly—base, slewing group, hydraulic system, control valves—with part numbers and logbook codes printed alongside exploded drawings. Italian and English side by side.

Basamento (Base) and Gruppo Rotazione (Slewing Assembly): Chapter Breakdown

The catalog opens with the base structure (page 1) and the slewing assembly (page 2). Part numbers like 6.24.0054-1-1 for the slewing group include the logbook code (Codice libretto). If you need the hydraulic jack for rotation, page 3 lists it under “IMPIANTO IDRAULICO (MARTINETTO ROTAZIONE)”. Each chapter references the correct code—no cross-referencing third-party lists.

For tractor or other equipment fastener specs, see Massey-Harris-Ferguson FF 30 GS 1957 Parts Catalog | OEM Fastener Guide. The same level of detail applies.

Does This Manual Cover the Hydraulic System?

Yes, multiple chapters. The catalog devotes pages 4 through 16 to the hydraulic system: stabilizer jacks, control valves (5 and 6 sections), solenoid valves, and the system safety valve. Each component has its own table. For example, the stabiliser ram (Martinetto Stabilizzatore) appears on page 6 under code 6.40.0109-1-1. If your crane uses extra-extensible stabilizers, page 7 covers those rods (ASTE STABILIZZATRICI EXTRA ESTENDIBILI). The CE variant is on page 13. You find the right variant fast.

117 pages. That is the full count. No fluff.

Stabilizer Rod and Extra-Extensible Variants

Standard stabilizer rods appear on pages 4, 6, and 10. The extra-extensible rods (page 7) have a different part number series. The hydraulic jack for each rod type is listed separately—page 5 for the standard ram, page 12 for another variant. If you own a machine with the CE safety upgrade, page 13-14 cover that specific hydraulic installation. The catalog also includes the rotation limiting device (page 28) and electrical controls (pages 26-27).

For wear parts on other equipment, the Futura Wear Technology Parts Catalog is a useful reference.

3 Reasons to Use the Factory Parts Catalog Over Aftermarket

1. Logbook code matching. Every assembly has a “Codice libretto” that ties to the machine’s registration. Aftermarket catalogs omit this—you risk ordering a part that fits another revision.
2. Exploded views with callouts. Each drawing numbers components. The table next to it lists each number, description, and part code. No ambiguity.
3. Seven languages. Italian, English, French, German, Spanish. If your shop works with multilingual manuals, this saves a phone call to the manufacturer.

Double Controls and Solenoid Valve Diagrams

Pages 21 through 24 cover double controls (bilateral controls) for both 5- and 6-element systems, plus the solenoid valve hydraulic circuit. The rotation limiting device on page 28 is a safety-critical assembly. Having the OEM diagram means you can verify the correct limit switch part number without tearing the cab apart.

Understanding crane manufacturing standards is important: see Automotive Industry Overview for context. For more on hydraulic system design in mobile equipment, refer to Automotive Industry Overview.

For a different approach to part indexing, the LANDTRAC TRACTOR Parts Manual Models 410-550 DTC – Section: Numerical Index shows how numerical indexes are structured.

FAQ

Does this catalog include torque specifications?

No. This is a parts catalog, not a repair manual. Torque values are not listed.

How do I identify the correct part number for a stabilizer ram?

Use the table index starting on page 2. Locate the assembly group (e.g., Martinetto Stabilizzatore on page 5). Find the part number and logbook code. Cross-reference with the exploded view. If you have the serial number of your crane, contact AMC O. & V. B. A directly. For example, the standard stabiliser ram part number is 6.40.0109-1-1. If your crane has the extra-extensible option, the ram is listed on page 7 with a different code. The catalog also includes CE variants. Always verify by the logbook code (Codice libretto) printed on the machine’s data plate. Using the wrong part can lead to hydraulic misalignment or safety risk.

You have the machine. You need the part. This is the factory-issued book that gets it right. Access the Factory Manual and keep your AMC O. & V. B. A 703 or 903 working.