4-29
Storage of the machine
1. Preparation before storage
When storing the machine for a long time, follow the below steps.
1) Clean and rinse all parts, and then put the machine in the room. If you have to store the machine
outdoors, choose a flat ground and cover the machine with a cover cloth.
2) Apply a thin layer of grease to the metal surface of the piston rod. Lubricate all lubrication points.
3) Remove the battery, and then store it in a dry and non-freezing place after adding the liquid and
charging it.
4) The engine oil is discharged in a hot state and the engine is filled with anti-corrosion engine oil.
The anti-corrosion engine oil used is MIL-L-21260 for piston engines. Use grade 1 or 2 SAE10W for
winter storage and grade SAE30 for summer storage.
5) Add 4 to 6% of the same type of anti-corrosion engine oil in the fuel, and mix the two together well.
In order to prevent the generation of condensed water, the fuel tank must be refilled with this mixed
fuel.
6) Check the antifreeze performance of the coolant, and use the method of adding antifreeze to make
its antifreeze power at least -20
℃
. If the coolant does not contain an anti-corrosion agent due to the
weather, you should add an anti-corrosion agent (for example, according to MIL-G4339C, it should
contain a 5% anti-corrosion agent).
7) Start the engine and let it rotate for more than 15 minutes. Different speeds can be used but no
load. It should also run when draining lubricating oil from hydraulic components and reducer, and
then replaced with new oil for storage.
8) Close the air inlet of the air filter and the outlet of the exhaust pipe. For this, it is recommended to
use plastic thick paper and adhesive tape.
9) Lock the platform, raise the left control box, so that the joysticks and pedals are in a locked state.
10) Put the shut-off valve used to install accessories on the machine to the locked position. Install a
plug on the elbow.
11) Keep the machine clean and store it in a dry place.
Note: When storing the machine, adjust the
machine to the posture shown in the figure on
the right to protect the piston rod of the cylinder
and prevent the piston rod from rusting.
Summary of Contents for U27
Page 1: ...U27Hydraulic Excavator Instruction Manual Guangxi Yuchai Heavy Industry Co Ltd...
Page 5: ...1 1 Preface...
Page 17: ...2 1 Safety regulations...
Page 44: ...3 1 Parts introduction...
Page 49: ...3 6 Panel meter Oil level pointer Timing display Water temperature pointer Indicator area...
Page 55: ...4 1 Operation guide...
Page 89: ...5 1 Maintenance...
Page 130: ...6 1 Accessories guide...