28
Load-side bearing
Grease port
Anti-Load-Side bearing
Grease port
Grease pan
Grease pan
CAUTION
Be cautious of replenishing grease more than the spcified amont. It may cause leaking of grease and/or
malfunction of the protective device due to overheat of the bearing. Grease at once during start-up
commissioning. Periodically replace the main motor bearing in accordance with
“
3. Maintenance”
Maintenance Schedule A Maintenance Schedule B in pages 13 to 16
[Fixed speed type]
Grease pan
Load-side bearing
Grease port
●
Example of grease gun
Lever-type grease gun CH-400 Micro-Hose (pin type
SPK-1C) by Yamada Corporation
Grease filling amount
Operation condition
Filling
frequency
Filling amount
Fixed-speed Variable-speed
For 8,000 hours or less
operating hours per year
Every 3
months
Fill 2.3 oz
(65 g) each
on the load
and opposite
sides.
Fill 2.6 oz
(75 g) on the
load side.
For 4,000 hours or less
operating hours per year
Every 6
months
①
Open the front door. Inject a specified amount of
grease through the grease inlet using a grease gun.
②
If used grease is discharged in the grease pan under
the grease inlet, clean the pan as necessary.
③
Close the front door.
The bearing on the opposite side is shield type; filling
of grease is not necessary on the opposite side.
●
Contact the local HITACHI distributor/master dealer or
representative office for the grease detail.
●
Greasing must be done while the main motor
operating.
●
Cleaning of grease pan must be done while the air
compressor stops.
IMPORTANT
The main motor bearings must be greased as following
table.
Grease following amount of RMS grease (Ref. No. 455)
(Raremax Super by Kodo Yushi) .
4.10 Main Motor Greasing
