Page 16 3000-4, 2000-5 NG/LP
HOW TO CORRECT PROBLEMS IN THE MACHINE
Problem
Cause
Action
Oil is dripping
The oil seal is worn.
Contact an authorized Delco service person.
Chemical not
Chemical control valve
Tighten all fittings. Check for leaks in plastic
picking up.
leaking around fittings.
chemical lines.
Chemical control valve
Tighten jam nut. Replace valve.
leaking around stem.
Screens on chemical
Clean or replace.
suction lines stopped up.
Pop-off valve leaking
Not adjusted properly.
Contact an authorized Delco distributor.
Seat bad or worn.
Replace pop-off valve.
Nozzle stopped up or
Remove nozzle and clean. Turn hi-pressure
restricted in discharge.
pump on and flush lines, then replace nozzle.
The pump
The oil level is low.
Fill to the proper oil level with high quality SAE
overheats.
30-weight non-detergent oil.
The machine has been
Immediately press the gun release lever
running for an extended
to allow cool water to flow into the pump.
period of time with the trigger gun off.
Pressure excessive, rises
Scale or dirt in coils
See "Preventative Maintenance" descaling of coils.
too fast, and pops off at relief valve
High pressure nozzle.
Remove nozzle at tip of gun and clean. Flush.
There is/has been
The oil seal is worn.
Contact an authorized Delco service person.
water in the oil and water is dripping
from under the pump.
The humidity is high.
Contact an authorized Delco service person.
Cracked plunger.
Contact an authorized Delco service person.
The plunger packing isworn.
Contact an authorized Delco service person.
The plunger retainer
Contact an authorized Delco service person.
o-ring is worn.
Excessive vibration to gun
Worn, clogged or defective
Contact an authorized Delco service person.
and hose
check valves in pump.
Restricted or under size nozzle.
Clean and or replace with proper size.
The pump is drawing air.
Contact an authorized Delco service person.
The motor will not start.
Power cord may not be connected.
Connect the power cord.
Switch may not be turned "ON",
Turn switch "ON".
Ground fault circuit
Reset the ground fault circuit interrupter.
interrupter did not reset.
The power cord may be
Contact a licensed electrician.
connected to a dead outlet.
May have a defective motor or switch.
Contact your authorized Delco dealer.
The thermal overload switch tripped.
Allow motor to cool, reset thermal switch.
The motor has difficulty
Circuit may be too long,
Locate the outlet nearest to the circuit
starting, or is overheating.
overloaded, or conductors
panel which can be reached with the
may be undersized.
cord supplied with the machine.
Incorrect voltage or frequency.
Check the voltage and frequency.
The motor is wet.
Contact an authorized Delco service person.
The coils are limed.
Delime the coils. See Operators Safety Manual
The nozzle is dirty.
Remove and clean the nozzle.
Low Pressure
Loose belt on pump.
Tighten the belt.
Leaks in plumbing.
Tighten all connections.
Insufficient water supply
Increase water supply by using larger lines.
Insufficient water.
Check water pressure and flow to machine.
Check float valve and float valve adjustments.
Nozzle is worn.
Replace the nozzle.
Wrong nozzle size.
Replace with proper size.
Dirty or worn check valves in pump.
Contact an authorized Delco distributor.
V-packings.
Contact an authorized Delco distributor.
