An excavator that sits for a season does not simply wait. Oil drains off the surfaces it was protecting, seals take a set in one position, moisture condenses inside tanks and cylinders as the temperature swings, batteries self-discharge and sulphate, and unprotected bores begin to corrode. The damage accumulates silently, and it is usually discovered at the restart, when a machine that was parked in good order produces a hydraulic system carrying water and a pump making a noise it never made before. Guangzhou Shenyue Machinery Technology Co., Ltd. has supplied Kobelco parts since 2007, and this guide sets out the sequence that keeps a parked machine ready to work.
Why storage is harder on a machine than work
In service, oil is constantly circulating: it carries heat away, keeps surfaces wetted, and the filter keeps stripping contamination out of it. In storage none of that happens. Condensation forms inside the hydraulic tank and the fuel tank as the air above the oil warms and cools, and the water it leaves goes to the bottom of the tank and into the oil. Cylinder rods left exposed lose their oil film and can pit. Seals compressed in one position take a set and leak at the first stroke. A battery left connected will be flat and sulphated within weeks. None of this is dramatic, and all of it is avoidable.
The shutdown sequence, in order
Work the machine to full operating temperature first, so the oil you are leaving in the system is dry and has been through the filter. Then park it on firm, level ground with the attachment lowered and the bucket curled under, so no cylinder is holding load and no rod is exposed longer than it must be. Wash the machine — mud holds moisture against metal and hides leaks — and let it dry fully before it is closed up. Top up fuel nearly full to limit the air space where condensation forms, and drain any water from the fuel separator now rather than at the restart. Remove the battery and store it dry on a maintenance charger. Finally, seal the exhaust and any open breathers so damp air and insects cannot enter.
| Step | Why it matters |
|---|---|
| Run to operating temperature | Leaves dry, filtered oil in the system |
| Park on firm level ground, attachment down | No load held, minimum exposed rod |
| Wash and dry fully | Mud and moisture breed corrosion |
| Fill the fuel tank | Less air space, less condensation |
| Drain the water separator | Water sits at the bottom and corrodes |
| Remove the battery | Avoids sulphation and parasitic drain |
| Seal the exhaust and breathers | Keeps damp air and insects out |
The monthly round nobody does
Two hours a month separates a machine that restarts from one that needs a hydraulic flush. Turn the engine over on the starter without letting it fire, to circulate oil without combustion heat, or run it briefly and operate each function slowly. Cycle the cylinders a little to keep the seals wetted and change the set of the seal lips. Check under the machine for fresh weeps, which indicate seals beginning to fail in storage. On machines stored for a season, that monthly movement is the highest-value maintenance item available.
The restart, which is where the money is lost
Do not crank and work. Check the oil for water before anything else, and change the return and pilot filter elements before the machine works at load, because whatever settled in the tank over the storage period is now going to move. Our stock carries the pilot inline filter YN50V00020F1 and the hydraulic pipe filter LS50V01001S001, and the filters and lubricants range covers the return elements. Recharge or replace the battery, start the engine and let it idle warm, then operate each function slowly through its whole range before applying load. Watch hydraulic oil temperature on the first day, because a cooler with blocked fins or a restricted return path shows itself as heat before it shows itself as a failure. The hydraulic components range covers the filter, hose and cooler lines a stored machine most often needs, including hoses such as LC05P00043S032 / LC05P00043S002C.
How we supply
Guangzhou Shenyue Machinery Technology Co., Ltd. has specialised in Kobelco since 2007, with 4 warehouses over 1000 m² in Guangzhou, 3,000+ part types on the shelf and 100,000+ part numbers available to order through original supply channels. Shenyue is an independent supplier and is not an authorized dealer of Kobelco Construction Machinery Co., Ltd.; for Kobelco, Hino, Isuzu, Yanmar, Cummins, Kawasaki, Nabtesco, KYB and KPM we supply genuine parts ordered through original supply channels alongside quality replacement alternatives, at prices close to agent level, and the five brands we hold formal authorization for — Mitsubishi, Garrett, TONGMYUNG, Marusan and NIKURA — are named on every quotation. Fleets that store several brands side by side and want filter and preservation consumables consolidated into one shipment can compare the multi-brand range at excavatorpartsglobal.com, while this page stays focused on Kobelco service. Published Kobelco service data is a useful cross-reference for long-term parking.
Frequently Asked Questions
How long can I leave a Kobelco parked before it needs preparation?
Anything beyond a few weeks deserves the full shutdown sequence, and anything beyond a month needs the monthly round as well. The damage in storage is cumulative and mostly invisible until restart, so treat a seasonal park as a scheduled procedure rather than simply switching the machine off.
Should I drain the hydraulic oil before long storage?
No. Run the machine to full operating temperature first so the oil left in the system is dry and freshly filtered, and deal with water at the restart by checking the oil and changing the return and pilot filters before the machine works under load. Draining and refilling introduces its own contamination risk.
Why will my machine not start properly after six months parked?
Usually the battery, and then the fuel. A connected battery sulphates within weeks, and fuel left with air space above it collects condensation and water in the separator. Recharge or replace the battery, drain the separator, and check the oil for water before attempting to work the machine.
What parts should I have ready before restarting a stored Kobelco?
Return and pilot filter elements, a battery, and fuel separator elements at minimum. Guangzhou Shenyue Machinery Technology Co., Ltd. quotes those as a preservation kit and can add hoses, cooler lines and cooler parts where the machine shows heat on the first day back at work.