Troubleshooting - Graco Husky 205 D110 Series Instructions Manual

Relieve the pressure before you check or service the
equipment.
Check all possible problems and causes before you
disassemble the pump.
Internal Air Valve-Operated and Remote Solenoid-Operated Pumps
PROBLEM
The pump cycles at stall, or it fails to
hold pressure at stall.
The pump operates erratically.
There are air bubbles in the fluid.
There is fluid in the exhaust air.
The pump exhausts air near the fluid
covers.
The pump exhausts air near the air
valve.
The pump leaks fluid from the check
valves.
10 308652ZAM

Troubleshooting

To reduce the risk of serious injury whenever you are
instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
CAUSE
The check valves (20) or o-rings (21)
are leaking.
The check valves (20) are worn.
Debris is stuck between the a check
valve (20) and the seat.
The suction line is clogged.
The check valves (20) are sticking or
leaking.
A diaphragm (30) is ruptured.
The suction line is loose.
A diaphragm (30) is ruptured.
The manifold (52) is loose, or the
o-rings (21) are damaged.
The fluid covers (51) are loose.
A diaphragm (30) is ruptured.
A diaphragm plate (50) is loose.
The fluid covers (51) are loose, or the
o-rings (57) are damaged.
The air valve cover screws (14) are
loose.
The top (5) and/or side (6) air valve
o-rings are damaged.
The o-rings (21) are leaking, or the
screws (58) are loose.
www.northridgepumps.com
WARNING
SOLUTION
Replace the check valves and/or
o-rings. See page 14.
Replace the check valves.
See page 14.
Clean the check valve/seat area.
See page 14.
Inspect and clear the line.
Replace the check valves, or clean
and check the valve/seat area.
See page 14.
Replace the ruptured diaphragm.
See page 13.
Tighten the suction line.
Replace the ruptured diaphragm.
See page 13.
Tighten the manifold screws (58).
Replace the o-rings (21). See
page 14.
Tighten the fluid cover screws (58).
See page 13.
Replace the ruptured diaphragm.
See page 13.
Tighten the diaphragm plate.
See page 13.
Tighten the fluid cover screws (58), or
replace the o-rings. See page 13.
Tighten the screws. See page 12.
Replace these o-rings.
See the Parts Drawing on page 17.
Replace these o-rings, and tighten the
screws. See page 14.