HeavyEQ parts intelligence
Caterpillar 320B and 320C: research the installed assembly
Research first. Identify the installed component. Confirm the application.
Keep 320B, 320C and the current 320 as separate machine identities. A familiar family name cannot identify a service filter, cylinder kit or travel assembly. Begin with the exact designation and document what is installed today before requesting a replacement.
Original identification research · Manufacturer model associations are general evidence · Serial and installed-assembly application outstanding
Comparison alternatives, discontinued references and actual seller availability are separate records. Use the private request to state the assembly scope and evidence you have. Select the exact machine in the request; a shared guide does not select a generation for you.
Preserve generation and modification history
Read the factory designation without dropping letters or suffixes. Retain the equipment research context already associated with that identity. Record a known engine, pump or cylinder replacement separately from the machine’s original description. An undocumented modification should remain a question. A machine can keep its original nameplate after a major assembly has changed, so the model record and component record must both accompany a parts investigation.
Identify the circuit and service location
For filtration, identify the actual housing, service circuit and existing readable element marking. Similar dimensions or a shared model list do not establish the required efficiency class or service function. Keep an uncertain housing or illegible marking unresolved. Ask the supplying technical source which documentation connects its proposed item to that installation. This guide provides no service interval, fluid specification, dimensions or approved substitute.
Separate a cylinder kit from the cylinder
Record the installed cylinder’s position, assembly marking and documented revision before investigating its internals. A kit for one cylinder group cannot be assigned to the boom, stick or bucket position merely from the carrier designation. For travel components, distinguish a complete drive, motor, reduction, valve and shaft. Describe the requested scope explicitly and retain the installed side, connections and component tag as observations rather than proof of interchangeability.
Prepare a useful request
Use the existing historical research identity where it is available and leave unsupported identifiers blank. State whether the reference came from a readable marking, a general manufacturer model list or a serial-filtered source. Ask a real supplier what is included, what further identification is needed and whether the actual item is available. Keep full PINs and identifiable photos out of public descriptions. A private HeavyEQ receipt confirms intake; it does not confirm fitment or dispatch an inquiry to Caterpillar.
Source references
- Caterpillar Parts Store: identify the machine before selecting an application ↗ · reviewed 15 October 2026 · public factual reference
- Caterpillar SIS2GO: serial and service-information context ↗ · reviewed 15 October 2026 · public factual reference
Original research commentary. Manufacturer drawings, catalogue tables and inventory are not reproduced.