3M 26878 Manuel D'utilisation page 20

Locking Collar Removal
If desired, the atomizing head locking collar
can be removed from gun frame in order to
thoroughly clean head of gun body�
1� While atomizing head locking collar is in the
"+ configuration" and without an atomizing
head attached to the spray gun body, pull
locking collar firmly forward�
2� Reverse process to re-attach locking collar
ensuring that the retention bumps on the ID
align with spray gun body head protrusions�
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