CAT 320D-336D 36 PDF pages
Main pump & pump control
Training reference / model variants differ
View contentsYUANJIAN MACHINERY / TECHNICAL LIBRARY
CAT 320D Repair & Technical Resources
CAT 320D reference contents, actual machine evidence and matched technical support.
Look inside the references
CAT 320D-336D 59 PDF pages
Travel system & final drive
Training reference / different model sections
View contentsWhat the 320D reference set contains
The inspected collection includes 258 pages of hydraulic system operation, 140 pages of hydraulic testing, separate main-pump and main-control-valve training, swing and travel explanations, electrical diagrams and an illustrated 320D L parts file. The pump/travel training covers multiple D-series models in separate sections; do not assume identical pumps, settings or assemblies across the range.
Find your model and reference
15 selected records. Checked opening-page identities and page counts are shown where available; each full document still needs serial and edition matching.
15 references
CAT 320D CAT-D-01
Hydraulic system testing and adjustment
Contents sampled; 140 PDF pages
140 PDF pagesRequest reference
CAT 320D CAT-D-02
Electrical system diagram (Chinese edition)
Catalogue metadata; edition to confirm
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CAT 320D CAT-D-03
Boom, stick and bucket circuits
Catalogue metadata; edition to confirm
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CAT 320D CAT-D-04
Swing system operation
Contents sampled; 38 PDF pages
38 PDF pagesRequest reference
CAT 320D CAT-D-05
320D-336D system introduction
Catalogue metadata; edition to confirm
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CAT 320D CAT-D-06
Pilot hydraulic system
Catalogue metadata; edition to confirm
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CAT 320D CAT-D-07
Travel system operation
Contents sampled; 59 PDF pages
59 PDF pagesRequest reference
CAT 320D CAT-D-08
Main control valve and return system
Contents sampled; 29 PDF pages
29 PDF pagesRequest reference
CAT 320D CAT-D-09
Main hydraulic pump and pump control
Contents sampled; 36 PDF pages
36 PDF pagesRequest reference
CAT 320D CAT-D-10
Hydraulic schematic
Catalogue metadata; edition to confirm
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CAT 320D CAT-D-11
Operation and maintenance reference
Catalogue metadata; edition to confirm
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CAT 320D CAT-D-12
Electrical circuit diagram (Chinese)
Catalogue metadata; edition to confirm
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CAT 320D CAT-D-13
Electrical system operation and principles
Catalogue metadata; edition to confirm
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CAT 320D CAT-D-14
Fan clutch reference
Catalogue metadata; edition to confirm
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CAT 320D / MCH YJ-320D-HYD-OP
320D hydraulic system operation
Selected pages inspected; confirm edition and serial range
258 PDF pagesRequest reference
No matching entry in this public selection. Send the model, serial prefix and technical issue so we can check the wider archive.
Practical technical guides
CAT 320D hydraulics slow or weak?
Separate one-function faults from machine-wide loss of performance.
Main pump or pilot system: what is the difference?
Understand the control path before blaming or buying a pump.
Why is one CAT 320D track slow?
Track-side evidence, travel circuits and final-drive checks.
Which CAT manual matches my serial number?
Model suffix, engine, serial range and document revision.
What should CAT 320GC inspection evidence include?
Serial identity, hours, engine, pump and undercarriage.
From technical information to the actual machine
YUANJIAN MACHINERY INTERNATIONAL TRADING LIMITED
Technical support beyond the machine sale
A direct used excavator supplier in China with our own refurbishment team, real-machine inspection photos and working videos. Customers who buy a used excavator from YUANJIAN receive available, applicable resources and free machine guidance for 5 years after purchase.
Resource access, safety and service terms
Public pages contain original YUANJIAN explanations and selected catalogue metadata. Complete documents are supplied only where available, applicable and permitted. Manufacturer rights remain with their owners; YUANJIAN is not a Caterpillar-authorized service center. These indexed collections can combine engine and machine chapters, languages and revisions. Confirm the complete machine serial number, engine identity and the current procedure before repair.
Five-year guidance covers operation, maintenance questions and troubleshooting communication. It is not a five-year machine warranty and does not include free parts, consumables, freight, on-site labor or repairs. Qualified technicians must perform pressure tests, adjustments, lifting and disassembly using the serial-specific service instructions.