2-28
Hydraulic system
1. Safety rules for high pressure oil
There is always pressure inside the hydraulic system.
When inspecting or replacing pipes or hoses, be sure
to check whether the pressure in the hydraulic oil
circuit has been released. If the oil circuit is still under
pressure, serious injury or damage will be caused, so
follow these regulations:
1) Do not check or replace when there is pressure in
the hydraulic system.
2) If there is any leakage in the pipe or hose, the
surrounding area is wet, so check if the pipe or hose is
broken and the hose is swollen. Wear goggles and
leather gloves when performing an inspection.
3) The high-pressure oil leaking from the small holes
will penetrate into the skin, and there will be a risk of
blindness if it directly touches the eyes. If you are
injured by high pressure oil hitting your skin or eyes,
rinse with clean water and contact your doctor for
treatment immediately.
2. Safe operation of high pressure hoses
If the high pressure hose leaks oil or fuel, it may cause a fire or operation failure, resulting in
serious injury or damage. If the bolts are found to be loose, stop the work and tighten the
bolts to the specified torque. When welding the machine, it is strictly forbidden to do it
without isolating the hydraulic oil pipeline (hose). If any damage to the hose is found, stop
the operation immediately and get in touch with the Yuchai agent.
If the following problems are found, replace the hose:
1) Damaged or leaking hydraulic pipe joints;
2) The cladding is worn or broken, or the steel wire of the reinforcing layer is exposed;
3) The cladding swells in some places;
4) The movable part is twisted or crushed;
5) There are impurities in the cladding.
3. Safety rules for hot oil
The hydraulic oil that is not cooled during or after work is at high temperature and high
pressure. To prevent scalding caused by sprayed oil or contacting hot parts when checking
or draining oil, wait until the oil cools to the temperature that can touch the cover or plug
before starting operation. Even if the oil has cooled, slowly loosen the cover or plug before
removing the cover or plug to drain the internal pressure.
Summary of Contents for U35
Page 5: ...1 1 1 Preface...
Page 15: ...2 1 2 Safety regulations...
Page 45: ...3 1 3 Introduction of components...
Page 70: ...4 1 4 Operation guide...
Page 90: ...4 21 6 After the engine shuts down reset the shutdown lever...
Page 104: ...5 1 5 Maintenance...
Page 147: ...6 1 6 Accessories guide...