Direct answer
For a Lovol excavator described as “65,” confirm the complete model suffix and serial number before using a service specification. A slow boom is a symptom, not proof that the main pump requires overhaul.
Scope and safety
This is a symptom-recording and service-handoff guide, not a procedure for testing or adjusting the machine. Follow the exact machine manual and displayed safety instructions. Keep clear of moving equipment and suspected pressurized leaks. Shutdown alone may not remove stored pressure; hydraulic work and attachment support require the correct procedure and qualified personnel.
Define the complaint
Record whether only boom raising is slow or other functions were also affected. Note the attachment, work mode, warning messages and whether the complaint appeared after routine maintenance or a repair.
Collect records without dismantling
Supply recent filter and fluid service details, the machine plate and safely accessible component labels. Report visible leakage from a safe position. Do not lift the attachment to an extreme position to investigate drift.
Request the matching test procedure
Ask for a service report based on the precise model rather than a generic “65” pressure table. The technician should explain how the findings distinguish the proposed component repair from other possibilities. Relief adjustment, valve removal and cylinder work need the specified isolation and support arrangements.
Service handoff record
| Record | Information to supply |
|---|---|
| Identification | Full machine model and serial; engine or attachment identity where relevant. |
| Complaint | The affected function, direction, timing and original screen message. |
| History | Recent service, changed parts and existing test reports; mark missing information as unknown. |
| Diagnosis | Technician’s confirmed component, applicable manual reference and repair scope. |
Frequently asked questions
What is the correct main or pilot pressure?
This page does not establish those values. Obtain them with their test conditions from the matching manufacturer procedure.
Is the oil’s color enough to prescribe replacement?
Record its appearance as an observation and provide the service history; follow the specified maintenance and diagnostic guidance.
Sources and scope of evidence
- Lovol Heavy Industry manufacturer website — manufacturer documentation or support access; obtain the reference for your exact machine.
- Caterpillar hydraulic hose inspection and pressure safety — general hydraulic inspection and stored-pressure safety.
These public sources provide documentation/support routes and general safety context. They do not verify a model-specific fault-code definition, pressure setting or repair case. This guide therefore supplies no such specifications. Source links checked 14 September 2026.
Related guides
- Excavator Preventive Maintenance Checklist
- Excavator Hydraulic Pump Failure Symptoms and Next Checks
- How to Check Parts Fitment Before an International Order
Parts identification after diagnosis
Danch Machinery supplies genuine parts. Send the confirmed part number, machine serial number and clear identification photographs for an availability and fitment inquiry. A symptom description does not establish fitment or current stock.
Request a parts identification check
About this guide
Published by Danch Machinery as general parts-identification and service-planning information. It is not a signed technical inspection or a machine-specific repair approval. Refer to the sources and scope stated in the article; confirm service procedures and fitment with the current manufacturer documentation for the exact machine.
Machine configurations and service requirements can differ by model, serial number and market. Confirm procedures and fitment with the current manufacturer documentation for your exact machine.
