Graco LubePro A4000, Instructions Manual

Page: 13 / 38

Troubleshooting
3A5266G 13
Troubleshooting
Problem Cause Solution
Pump is not operating. No lubricant
flow.
No air
1. Adjust air pressure/supply.
2. Open bleed-type master air valve (F)
(page 5 and 6).
Pump is operating. No lubricant flow.
No lubricant in reservoir Fill the reservoir.
Losing prime
1. Remove trapped air (see Priming,
page 10).
2. Prime pump.
Injectors not cycling or only some of the
injectors are operating
No lubricant flow See Pump is not operating. No lubri -
cant flow in Troubleshooting table.
Low pressure or no pressure
1. Check piping for leaks. If a leak is
detected, repair or replace piping.
2. Check injectors for leaks. If a leak is
detected, repair or replace injector.
3. If the pressure relief valve is set
below the injector firing pressure,
the injector will not operate. See
page 11 for pressure relief setup
instructions.
4. Check vent and relief valve o-rings.
Damaged/worn o-rings will not allow
pump to reach full pressure.
Pump seals are bad Replace seals. See Parts, page 18
and 20.
Divider valve not cycling
No lubricant flow See Troubleshooting, Pump is not
operating.
Low lube point pressure or no pressure
See Troubleshooting, Pump is not
operating.
Check valve block for leaks.
Check valve block for stuck pistons.
Pump seals are damaged Replace seals.