13
309224
Troubleshooting
PROBLEM
CAUSE
SOLUTION
Continuous air exhaust
from muffler.
Worn or damaged motor piston o-ring (32).
Inspect and replace. See page 21.
Air cup (7) not seating properly, or damaged.
Inspect; reseat or replace. See page 24.
Continuous air exhaust
from pilot valve vent
holes.
Worn or damaged carriage spool
u-cups (3c).
Inspect and replace. See page 24.
Worn or damaged actuator valve pin o-rings
(23).
Inspect and replace. See page 21.
Air motor not shifting
properly; erratic opera-
tion/stalling.
Worn or damaged actuator valve pin o-rings
(23, top or bottom).
Inspect and replace. See page 21.
Damaged actuator valve springs (16, top or
bottom).
Replace. See page 21.
Worn or damaged carriage spool u-cups
(3c). (Characterized by continuous air leak-
age from actuator valve vents.)
Inspect and replace. See page 24.
Clogged or obstructed valve porting.
Clean.
Worn out valve housing (3a).
Replace. See page 24.
Improper seating or damaged port or valve
housing o-rings (21, 30).
Inspect o-ring and groove. Clean or replace as neces-
sary.
Air leaking from base vent
hole.
Worn or damaged low pressure u-cup seal
(19).
Inspect and replace. See page 20.
Fluid leaking from base
vent hole.
Worn or damaged high pressure u-cup seal
(20).
Inspect and replace. See page 20.
