Briggs & Stratton PowerBoss Operator's Manual page 8

Lubricate O-Rings
Lubrication of o-rings is extremely important for
installation and operation. The use of a lubricant
(petroleum or synthetic grease) during assembly helps
seat o-rings properly and provides an improved seal. It
also helps protect the o-ring from damage by abrasion,
pinching or cutting and extends the life of the o-ring.
NOTICE ALWAYS apply a small amount of lubricant
on o-rings prior to assembling the garden hose to the
pump (A), high pressure hose (B), spray gun (C), and
nozzle extension (D).
8
Lubricate all connections shown below, following
these instructions:
1. Inspect and clean connecting surfaces prior to
lubrication and assembly.
2. Use lubricants sparingly during assembly; a light
film is all that is required.
3. Use a small brush or cotton swab to apply grease
directly to o-rings where they are not accessible
(QC fitting, M22 fitting).
C
D
B
A
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