Main Motor Greasing - Hitachi NEXT Series Service Manual

4.10 Main Motor Greasing

The main motor bearings must be greased as following
table.
Grease following amount of RMS grease (Ref. No. 455)
(Raremax Super by Kodo Yushi) .
IMPORTANT
● 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.
● Example of grease gun
Lever-type grease gun CH-400 Micro-Hose (pin type
SPK-1C) by Yamada Corporation
Grease filling amount
Filling
Operation condition
frequency
For 8,000 hours or less Every 3
operating hours per year months
For 4,000 hours or less Every 6
operating hours per year months
[Fixed speed type]
Load-side bearing
Grease port
Grease pan
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
Maintenance Schedule A Maintenance Schedule B in pages 13 to 16
Filling amount
Fixed-speed Variable-speed
Fill 2.3 oz
(65 g) each Fill 2.6 oz
on the load (75 g) on the
and opposite load side.
sides.
Anti-Load-Side bearing
Grease port
Grease pan
CAUTION
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.
Load-side bearing
Grease port
28
Grease pan
"3. Maintenance"