Free-Air Pump Trouble Shooting Guide - Bullard EDP10 Instruction Manual

TROUBLE SHOOTING GUIDE
If your Bullard Free-Air pump is not working
satisfactorily, please follow the trouble shooting
steps below:
SYMPTOM: Pump Fails to Start or
Hums
1. Turn pump switch off and disconnect from
the power source.
2. Check for the correct electrical current as
shown on the motor plate and in the Electric
Motor Specification Chart on page 7 of this
manual.
3. The pump is equipped with a thermal
overload protector that turns the current off
when subjected to electrical overloads.
Check to be sure that the circuit is not
overloaded by the pump and other electrical
equipment.
4. Wait 15 minutes and restart.
SYMPTOM: Outlet Air Pressure
Too Low
1. Be sure you know the proper pressure
range for the respirator - see the respira-
tor's instruction manual.
2. Be sure the respirator and air supply hose
are connected when the gauge reading is
taken.
3. Check to see that the gauge is functioning
properly. Replace the gauge if broken or
malfunctioning.
4. Check to see that the outlet filter jar is
seated firmly into the filter housing's O-ring
so that no air can escape. Replace the jar
and/or O-ring if damaged or worn.
5. Check to see that no air is escaping from
the relief valve in the outlet filter body. Reset
the pressure adjustment valve if necessary.
6. Check that both the inlet filter (Cat. No.
23611) and outlet filter (Cat. No.
S17101)are clean and replace if necessary.
Dirty filters restrict air flow.
FREE-AIR ® PUMP
7. Flush the pump with Loctite Safety Solvent
(Cat. no. S17931) to remove excessive dirt,
sand, particles, moisture or oil in the rotor
assembly.
See the Maintenance Section on Page 12
of this manual for proper directions on
flushing the pump.
When the parts are reassembled, attach
the respirator and turn the pump on,
monitoring the outlet pressure.
SYMPTOM: Outlet Pressure Too
High
1. The pressure adjustment valve is set too
high - reset to a lower pressure. Be sure
the outlet pressure remains in the proper
range for the respirator as specified by the
respirator manufacturer - see the respira-
tor's instruction manual.
2. Check the respirator's air supply hose for
kinks.
SYMPTOM: Pump Overheating
1. 160°-200°F (71°-93°C) is normal output air
temperature when the pump is continuous-
ly running. This heat is dissipated as it
travels through the respirator's air supply
hose until it reaches ambient air tempera-
ture.
2. Make sure that both the inlet and outlet
filters are clean. Replace if necessary.
3. The pressure adjustment valve is set too
high - reset to a lower pressure. Be sure
the outlet pressure remains in the proper
range for the respirator as specified by the
respirator manufacturer - see the respira-
tor's instruction manual.
4. Flush the pump with Loctite Safety Solvent
(cat. no. S17931) to remove excess dirt,
sand, particles, moisture or oil in the rotor
assembly.
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