Mechanical Operation and Maintenance Manual for ER20-1700 Industrial Robot
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For screws tightening and replacement, a torque wrench must be used to properly
tighten and paint them. Besides, unloosened bolts cannot be tightened with a torque
higher than required.
4.3 Change Lubricant
4.3.1 Lubricant Supply Quantity
Table 4-6 Amount of Lubricant to be Changed
Position
Amount
Lubricant Name
Remarks
J1 axis reducer
1310cc
MOLYWHITERE No.00
Quick injection can cause rising
pressure in the tank and crack of the
sealing ring, which lead to lubricant
leak. Therefore, injection speed should
be controlled under 40cc/10 seconds.
J2 axis reducer
1000cc
J3 axis reducer
320cc
J4 axis reducer
125cc
wrist parts
140cc
4.3.2 Lubrication Position and Angle
It is recommended to refer to the table below for lubricant replacement or supplement.
Table 4-3
Angle of Each Axis in lubricant Injection
Position
Angle
J1
J2
J3
J4
J5
J6
J1 axis reducer
any
any
any
any
any
any
J2 axis reducer
0°
J3 axis reducer
0°
0°
J4 axis reducer
any
0°
wrist parts
0°
0°
0°
0°
4.3.3 Procedures for Lubricant Change in J1~J4 Axis Reducer and
Wrist Parts
1
）
Move the robot to the lubrication position as described in table 3.7.
2
）
Cut off power.
3
）
Remove the M10*1 hexagon head plug of the lubricant inlet and outlet ports, as shown in Fig. 4-1.
4
）
Inject new lubricant until it drains from the outlet port.
5
）
Install the hexagon head plugs on the inlet and outlet ports.
6
）
Release the residual pressure in the cavity after injection according to the procedures in 4.3.4.
Incorrect operation may increase internal pressure in the cavity and damage the sealing part, which
lead to lubricant leak and malfunction. Therefore, please follow the steps below to apply lubrication.
