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BJ5-615 Chapter 5: Maintenance 37 of 85
Replacing or Refilling Lubricant
• Fill the bearings uniformly with grease until all operating surfaces are well-greased.
• For the rotor bearings, a lubricant quantity of one third to a maximum of half of the
bearing volume per bearing is required. If too much grease is used, the lubricant will
become unusable due to excessive temperature.
• Only one type of grease may be used, mixing different types of grease is prohibited.
The bearings have been filled at the factory with lithium base saponification roller
bearing grease F3.
• Refer to the “List of Lubricants” in this section for recommended bearing grease.
Refilling lubricant
The grease reaches through the circulating grooves and bores via lubrication nipples into the
interior of the bearing.
The greasing quantity is .13 to .22 lbs (60 to 100 g) roller bearing grease F3 per bearing.
Grease Nipple
Replacing Lubricant
Renewing the lubricant between intervals is only necessary when there unusual noises or
overheating. Mounting and dismounting of the bearings must be carried out in
accordance with the instructions in this operation manual (see replacing the bearings).
1. Open the bearing.
2. Remove the bearing housing and the bearing cover.
3. Clean the bearing carefully using petroleum ether.
NOTE: Petroleum ether, petroleum, spirit, aqueous neutral or alkaline
cleaning agents may be used to clean the bearings. After washing