SERVICE
WARNING
To
reduce
the
risk
of
serious
bodily
injury, including injection, splashing
in
the eyes, or injury from moving parts,
al-
ways follow the Pressure Relief Procedure on page
when checking or servicing any part of the
ing
system, when installing, cleaning or changing spray tipslnozzles, and whenever you stop
TROUBLESHOOTING CHART
PROBLEM
Pump fails to operate
Pump operates but:
-output
low
on both strokes
-output low on downstroke
-output low on upstroke
Erratic or accelerated pump speed
3ck all possible causes and
CAUSE
Restricted line or inadequate air
Insufficient air pressure, closed or
clogged air valves, etc.
Obstructed fluid hose or
gunldispensing valve
Fluid dried on the displacement rod
Dirty or worn air motor parts
Air motor
Restricted line or inadequate air
Insufficient air pressure, closed or
clogged air valves,
Obstructed fluid hose or
gunldispensing valve
Bleeder valve open
Air leaking into supply drum
Fluid too heavy for pump priming
Worn throat packings in displace-
ment pump
Air motor icing
Fluid too heavy for pump priming
Held open or worn priming piston
Air motor icing
Held open or worn piston valve or
packings
Air motor icing
Exhausted fluid supply
Fluid too heavy for pump priming
Held open or worn piston valve or
packings
Held open or worn priming piston
Worn throat packings in displace-
ment pump
Air motor icing
before disassembling the pump.
SOLUTION
Clear; see TECHNICAL DATA on
pages
Open, clear
Clear.
Clean;
see
SERVICE
Clean; service (see
should have
dew point
Check air line moisture content;
Clear; see TECHNICAL DATA on
page
Open, clear
Clear'
Close
Check inductor or ram plate seal
Use bleeder valve; see page
5;
use
inductor or ram unit
Clear; service
should have
dew point
Check air line moisture content;
Use
hleeder valve:
see
page
5:
use
inductor on ram unit
Clear; service
should have
dew point
Check air line moisture content;
Clear; service
should have
dew point
Check
air
line moisture content;
Refill and prime
Use bleeder valve;
see
page
6;
use
inductor or ram unit
Clear; service
Clear; service
Clear; service
should have
point
Check air line moisture content;
"Follow
the
Pressure Relief Procedure
and disconnect
the fluid
line.
If
the pump
starts
again
when
the
air is
turned on, the
fluid
hose, etc.,
is
clogged.
6
