Motoman PX2750, Manual

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9.2 Maintenance for Manipulator
9-8
HW0480633
Grease Replacement
Refer to " Fig. 22 S-axis RV Speed Reducer " and " Fig. 23 L-axis RV Speed Reducer ".
1. Remove the plug in the So (Lo) grease exhaust port. Remove the cover on the L-axis
motor side.
2. Inject grease into the Si (Li) grease inlet. Before injecting grease in the Li port, remove
the plug on Li and install a G nipple A-PT1/8.
3. The grease replacement is complete when new grease appears in the So (Lo) exhaust
port. The new grease can be distinguished from the old grease by color.
4. Move the S-axis (L-axis) for a few minutes to discharge the excessive grease.
5. Wipe the So (Lo) exhaust port with a cloth and reinstall the plugs in the So (Li and Lo)
exhaust port. Apply Three Bond 1104 on screwed parts.
Reinstall the cover on the L-axis motor side.
Fig. 22 S-axis RV Speed Reducer
• If grease is added without removing the plug, the internal pressure will be higher and may
damage it. It is absolutely necessary to remove the plug.
• When injecting grease into the L-axis speed reducer, grease may come out from the air
flow on the motor base. Remove the cover on the motor side to check if excessive
grease is coming out. If there is any grease, wipe it off.
Grease type: Molywhite RE No. 00
Amount of grease: 2000 cc for S-axis; 2300 cc for L-axis
If the plug is installed when the grease is being exhausted, the grease will go inside the
motor and may damage it. Reinstall the plug after the excessive grease is completely dis-
charged.
NOTE
NOTE
(with G nipple A-PT1/4)
Si: Grease inlet
So: Grease exhaust port
S-axis speed reducer
Cover
(with hexagon socket head plug PT1/8)