Makita HM1400 Instruction Manual page 5

Fig.8
Remove the plate 50 using a screwdriver, then replenish
with fresh grease (60 g). Use only Makita genuine
hammer grease (optional accessory). Filling with more
than the specified amount of grease (approx. 60 g) can
cause faulty hammering action or tool failure. Fill only
with the specified amount of grease.
Fig.9
Reinstall the plate 50 and secure with the screws.
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be
performed by Makita Authorized Service Centers,
always using Makita replacement parts.
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