Nordson ProBlue Flex Product Manual page 279

Problem
5.
Air leaking from the
exhaust ports on the air
manifold located under
the regulator cover
when the pump is not
moving
6.
Pump leaks air from
between the air cylinder
and cylinder head
7.
Pump leaks air from
between the air cylinder
and pump frame
8.
Pump leaks air from
between the piston shaft
and the underside of the
air motor
E 2020 Nordson Corporation
Possible Cause
Loose air piston assembly
Damaged or missing air piston cups
Missing or damaged O-ring
Loose cylinder screws
Missing or damaged O-ring
Loose cylinder screws
Air motor piston shaft seal missing,
worn, or damaged
SP Pump Diagnostics and Repair
Corrective Action
Inspect and repair the air piston
assembly.
Replace the O-ring.
Tighten the screws to 25 – 31 in-lbs.
Replace the O-ring.
Tighten the screws to 25 – 31 inch lbs.
Replace the air motor piston shaft seal.
B-7
Part 1128350_02