Market: United States current product page
Model: Cat 320
Engine: Cat C7.1
Evidence scope: current listed configuration
Model
Caterpillar 320
Current U.S. configuration on Caterpillar’s 320 hydraulic-excavator page; maximum system ratings are not service-test thresholds.
What concrete information can you get from this page?
Verified application example: United States current product page · Cat 320 · Cat C7.1
VERIFIED FACTModel / system fact
Caterpillar lists a Cat C7.1 engine application on the current 320 product page.
FAULT SEPARATIONWhen a symptom appears
If all functions are slow, correlate engine RPM/derate, pump command, main-system pressure and pilot/load-sense behavior to separate global pump issues from a single actuator fault.
FIRST MEASUREMENTBefore replacing parts
Do not use product-page maximum pressure as a service adjustment; serial number and service information determine the proper test port, mode and threshold.
Primary source: Caterpillar 320 Hydraulic Excavator official product data
Vehicle Identity and Application Matching
BrandCaterpillar
Related categories
RELATED SYSTEMS AND CODES
Technical topics in the same fault chain
Construction-equipment technical verification chain
This chain does not assume an exact engine or transmission code. Verify vehicle, build period, market and ECU/TCU identity before moving into technical atlases.
- Engine and derate conditions
- Hydraulic pump/pressure
- Control valves
- J1939/SPN-FMI
- Aftertreatment
- Temperature/pressure verification under load
Continue to workshop technical center → · Maintenance and ownership decisions →
Verified model-variant application graph
No exact model-variant binding is available in source data yet. The system does not infer variants from similar names.
Next technical research for this vehicle class
Model technical depth plan
This plan moves a model page from catalog identity to diagnosis and service decisions. Exact values are used only when verified for the specific application.
Use manufacturer service information and verified vehicle identity for exact OEM procedures, values and part applications.
6-step technical decision tree
- Verify identity
- Preserve first-event data
- Compare command and feedback
- Confirm with physical measurement
- Isolate root cause
- Retest under the same condition after repair
OEM EVIDENCE DOSSIER
Verified technical facts and application boundary
- Caterpillar lists a Cat C7.1 engine application on the current 320 product page. [S1]
- The official page lists 429 L/min as main hydraulic-system maximum flow. [S1]
- Caterpillar lists maximum pressures of 35,000 kPa for equipment, 38,000 kPa in lift mode, 34,300 kPa for travel and 27,500 kPa for swing. [S1]
- These are maximum product ratings, not automatic service-test thresholds or test-port specifications. [S1]
Verified application matches
The matches below are published only within the stated market, model-year and evidence scope. Fitment is not extrapolated to uncited variants.
System architecture and component relationships
- Separate the excavator power chain into engine ECU, hydraulic-pump control, main control valve and actuator circuits; poor performance may come from engine derate, pump command or hydraulic restriction/leakage.
- Travel and swing circuits have different maximum pressure classes; a single pressure expectation should not be applied to every function.
- Aftertreatment/DEF faults can derate the engine and mimic a hydraulic-performance problem, so engine load/derate state should be checked before hydraulic testing.
DTC / SPN-FMI / symptom discrimination map
- If all functions are slow, correlate engine RPM/derate, pump command, main-system pressure and pilot/load-sense behavior to separate global pump issues from a single actuator fault.
- If only one function is weak, use comparative cylinder/valve leakage testing to distinguish local leakage from pump-capacity problems.
- If hydraulic temperature rises, investigate pressure-side leakage, prolonged relief operation and cooling performance together.
Measurement and diagnostic strategy
- Do not use product-page maximum pressure as a service adjustment; serial number and service information determine the proper test port, mode and threshold.
- Compare electronic pump command with external flow/pressure measurement under the same condition to separate sensor bias from real hydraulic loss.
- Test travel, swing and equipment circuits separately; normal/high pressure in one circuit does not prove the others are healthy.
Exact pinouts, torque values, pressure thresholds or service limits are published only when explicitly verified by the applicable OEM service source.
Evidence provenance and primary sources
- Caterpillar 320 Hydraulic Excavator official product data · OEM-primary · 2026-08-15
- Caterpillar 320/320 GC/323 maintenance and service · OEM-primary · 2026-08-15
Other names and search terms
320Caterpillar 320
RELATED TECHNICAL TOPICS
Topics in the same system and fault chain
Technical Sources and Verification
How to verify the technical identity
The same model name can carry different engines, transmissions, emissions packages and ECU software across years and markets. Verify VIN/chassis, engine code, production period and controller identity together before selecting parts or procedures. If an exact value is not supported, AutoAtlas does not fill the gap by guessing.
Model and variant research coverage
Caterpillar 320 generation, engine, transmission, variant, DTC, common-problem and used-vehicle inspection research follows verifiable application links.
Deep technical guides
Deep symptom diagnostics
Connect technical research to the next decision
Connect model identity to engine, transmission, DTC and maintenance context to reduce wrong-part and wrong-procedure risk.
Next technical step for this model
Confirm engine and transmission identity, review related DTC and system records, and preserve the same vehicle identity for used-vehicle or maintenance decisions.
Engine Atlas → · Transmission Atlas → · Used-vehicle inspection →
Sources & freshness
Sources & freshness
Exact technical values, prices and failure rates are not invented without verified vehicle/manufacturer evidence.