Against the backdrop of strong global infrastructure demand, China’s excavator exports have maintained robust growth, and Shandong Shitian Heavy Industry has become a trusted supplier of high-quality excavators for international B2B buyers. As a core part of equipment maintenance, engine oil replacement directly determines the service life, operational stability and operating cost of export excavators. Based on general excavator operation guidelines and the Shandong Shitian Heavy Industry Excavator Operation Manual, this article systematically explains the engine oil replacement conditions, preparations, detailed steps and precautions for export excavators, providing professional maintenance guidance for global agents, construction teams and equipment managers to ensure the efficient and continuous operation of Shitian excavators under various overseas working conditions.

1. Engine Oil Replacement Conditions for Shitian Export Excavators

1.1 Engine Oil Replacement Conditions for Shitian Export Excavators

Standard working conditions: Replace every 500 working hours or every 6 months;

Severe working conditions: Shorten to 250–300 working hours in mines, quarries, high-temperature areas, cold regions or long-term high-load continuous operation;

New machine running-in period: Replace engine oil within 50 working hours for new machines or overhauled engines to remove running-in impurities.

1.2 Judgment of Oil Quality and Appearance

• Color and condition: The oil turns black, turbid, with visible metal shavings, sludge or water emulsification (milky white);
• Viscosity degradation: The oil becomes too thin or too thick, losing normal lubrication and protection performance;
• Foreign matter contamination: A large amount of dust, sand or coolant mixed in the oil.

1.3 Special Replacement Scenarios for Export Excavators

• After ocean transportation: It is recommended to replace the engine oil before commissioning after long-distance ocean shipping to eliminate moisture and contamination risks during transit;
• Cross-climate operation: Replace oil with appropriate viscosity grade when transferring between regions with large temperature differences (5W-40 for low temperature, 15W-40 for high temperature);
• Adapt to local fuel: Adjust replacement frequency according to the quality of overseas diesel, as poor fuel quality will accelerate oil deterioration.

2. Preparations Before Engine Oil Replacement

2.1 Preparation of Tools and Consumables

• Genuine Shitian special engine oil: Select API CF‑4/CH‑4/CJ‑4 grade and SAE 10W‑30/15W‑40 viscosity to meet export model requirements;
• Genuine Shitian oil filter: Must be replaced synchronously with engine oil to avoid residual impurities affecting lubrication;
• Special tools: Filter wrench, socket wrench, oil drain pan, clean rags, funnel, protective gloves, goggles;
• Environmental and safety equipment: Warning signs, fire extinguisher, leak-proof cloth, complying with overseas environmental operation standards.

2.2 Equipment and Site Preparation

• Park the excavator on flat and solid ground, lower the boom, retract the bucket, apply the parking brake and shut down the engine;
• Start the engine to preheat for 3–5 minutes, raising the oil temperature to 40–60°C to improve fluidity for complete drainage;
• Clean the oil filler cap, drain plug and filter base to prevent dust from entering the engine during operation;
• Prepare sealed waste oil containers and strictly comply with overseas environmental regulations for waste oil disposal.

3. Detailed Steps for Engine Oil Replacement

3.1 Drain the Old Engine Oil

• Place the oil drain pan directly under the engine oil pan drain plug;
• Loosen the drain plug counterclockwise with a wrench, remove it by hand and let the old oil flow out completely;
• Clean the drain plug during oil drainage and remove metal shavings adsorbed on the magnetic part;
• After draining the old oil, reinstall the drain plug and tighten it to the specified torque (usually 30–50N·m).

3.2 Replace the Oil Filter

• Loosen and remove the old filter with a filter wrench, tilt the filter to drain residual oil inside;
• Clean the engine filter mounting surface and remove residual adhesive from the old gasket;
• Fill about 2/3 of the new filter with new oil, and apply a thin layer of new oil on the rubber gasket;
• Hand-tighten the filter until the gasket fits the mounting surface, then tighten an additional 1/2–3/4 turns; over-tightening is prohibited.

3.3 Add New Engine Oil

• Open the oil filler cap and insert a clean funnel;
• Slowly add genuine Shitian engine oil in the specified capacity (6–12L for small models, 20–35L for medium and large models);
• Let it stand for 10–15 minutes after filling, check the oil level with the dipstick; the oil level should be between the MIN and MAX marks, preferably near the MAX mark;
• Securely install the oil filler cap.

3.4 Inspection and Test Run

• Start the engine and idle for 3–5 minutes, check for leaks at the drain plug and filter;
• Observe the oil pressure gauge/warning light; oil pressure should remain 0.2–0.6MPa and the warning light should go out normally;
• Shut down the engine, check the oil level again after standing for 20 minutes, and top up appropriately if insufficient;
• Record the replacement date, working hours, oil model and filter number to establish an overseas equipment maintenance file.

4. FAQ

Can local non-genuine oil be used for Shitian export excavators?

We strongly recommend using genuine Shitian engine oil or international brand oil that meets API CH‑4/CJ‑4 and SAE 15W‑40 standards. Substandard oil will aggravate engine wear, increase fuel consumption, and even invalidate overseas warranty.

What is the oil replacement interval for excavators working in tropical regions such as Africa and the Middle East?

Under high-temperature, dusty and high-load conditions, it is recommended to shorten the replacement interval to 250–300 hours, and use 15W‑40 fully synthetic oil to improve oxidation resistance and thermal degradation resistance.

Is the oil replacement process the same for different Shitian models such as 6T/22T/38T?

The basic operation process is identical, but the oil filling volume and filter part numbers vary. Be sure to follow the Shitian Operation Manual for the corresponding export model.

For global international buyers and partners:

Choose Shandong Shitian Heavy Industry excavators, deepen infrastructure with global quality, and create value with professional maintenance. Join hands with Shitian for a win-win in the global engineering market.