Graco Inc. 308178 - Manual (Page 8)

8 308178
Troubleshooting
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 4.
Relieve the pressure.
Check all possible problems and causes before
disassembling the pump or surge suppressor.
PROBLEM CAUSE SOLUTION
Surge suppressor operates
erratically Clogged air line or air inlet Inspect; clear.
Air line connected to pressure gauge
port Connect air line to air inlet
(see page 11).
Clogged fluid supply line, fluid inlet or
fluid outlet Inspect; clear.
Diaphragm (13 or 21 [ ) ruptured Replace. See page 9.
Unbalanced air pressures between
pump and surge suppressor Ratio of air inlet pressure to surge
suppressor and air inlet pressure to
pump must be the same as pump ra-
tio, but air pressure to surge sup-
pressor must never exceed 100 psi
(0.7 MPa, 7 bar). See page 7.
Air bubbles in fluid Fluid supply line loose Tighten.
Diaphragm (13 or 21
[
) ruptured Replace. See page 9.
Manifold o-rings (16) leaking Replace. See page 10.
Fluid in exhaust air Diaphragm (13 or 21
[
) ruptured Replace. See page 9.
Diaphragm plates (12 or 32) loose or
damaged Tighten or replace. See page 9.
Damaged shaft (11) or shaft o-rings
(19) Replace. See page 9.
Pump leaks air or fluid from cover (7) V-clamp (6) is loose Tighten V-clamp. See page 9.
[ Ref. No. 21, the PTFE diaphragm, is used only in Surge Suppressor Models 224892 and 224894.