Hitachi NEXT Series Instruction Manual page 103

Main Motor Greasing
13
The main motor bearings must be greased as following
table.
Grease following amount of RMS grease (Ref. No. 455)
(Raremax Super by Kyodo 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 of Compressor" and
Maintenance Schedule B .
9. MAINTENANCE [How to Service the Air Compressor]
Filling amount
Fixed-speed Variable-speed
Fill 2.3 oz
Fill 2.6 oz
(65 g) each
(75 g) on
on the load
the load
and opposite
side.
sides.
Anti-Load-Side bearing
Grease port
Grease pan
CAUTION
"9.2 Standard Maintenance Schedule" Maintenance Schedule A
① Open the front door. Grease the specified amount
through the grease port using a grease gun.
② Check the grease pan, and 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
Grease pan
"9.1 Periodical
101