Graco 25U085, Инструкция по эксплуатации

Страница: 17 / 26

Troubleshooting
3A8307D 17
Troubleshooting
1. Follow Pump: follow manufacturer's
recommendations. , page 7, before checking or
repairing the dispensing valve.
2. Check all possible problems and causes before
disassembling the dispensing valve.
Problem Cause Solution
Display does not activate or is show -
ing unintelligible characters
Electronic control is malfunctioning Replace electronic control. Order
PM8/20 Electronics Kit. Kit includes
electronic control, seal and mounting
screws.
Two or more batteries are installed
with incorrect polarity.
Check the polarity of all four (4) bat -
teries, and correct if necessary.
Batteries in electronic control are
depleted
Replace batteries.
Slow or no fluid flow Strainer (32) is clogged. Clean or replace strainer (32).
Pump pressure is low. Increase pump pressure.
Shut off valve is not fully open. Fully open shut off valve.
Foreign material is jammed in the
meter element.
Contact your local Graco distributor
for repair or replacement.
Fluid leaks from swivel (101) Swivel (33) is loose. Torque the swivel (33) to 15 to 20
ft-lbs (20 to 27 N•m).
If the problem remains, contact your
Graco distributor for repair or
replacement.
Damaged or worn o-ring(s) (PN
105765) (Reference item 33, Notes: ,
page 19)
Replace the o-rings (PN 105765) and
torque the swivel (33) to 15-20 ft-lbs
(20 to 27 N•m).
If the problem remains, contact your
Graco distributor for repair or
replacement.
Fluid flow does not stop when valve
is closed
Worn valve seat (30) Replace valve seat (30).
Rebuild valve using valve kit 18F174
for oil and gear lube models, 18F175
for anti-freeze models.
Fluid leaks from trigger barrel seals Damaged or worn o-ring(s) (24) Replace o-rings (24).
Rebuild valve using valve kit 18F174
for oil and gear lube models, 18F175
for anti-freeze models.
Trigger lock on/off feature does not
work
Damaged trigger components Replace trigger assembly. Order
PM8/20 Trigger Kit (18F172).