Graco E Series User Manual

IO OUTPUT
TYPE OF PROBLEM WHAT TO CHECK
If check Is OK, go to the next check.
Motor runs and pump
strokes
1. Check paint supply.
2. Check for clogged intake strainer.
3. Check for
loose suction tube or fittings.
4. Check to see if intake valve ball and pis -
ton ball are seating properly. See man -
ual 307-793.
5. Check for leaking around throat packing
aged packings. See manual
307-793.
nut which may indicate worn or dam-
Motor runs but pump does
rodpin. See page 31.
not stroke
1. Check displacement pump connecting
I
2. Checkconnectingrodassembiyfordam-
age. See page 30.
3. Be sure crank'in drive housing rotates;
plug in sprayer and turn
on momentarily
to check. Turn off and unplug sprayer.
See page 30.
~~...~~
~
- "
If check is not OK, refer to this column.
1. Refill and reprime pump.
2. Remove and clean, ihen reinstall.
3. Tighten; use thread sealant or sealing
tape
on threads if necessary.
4. Remove intake valve and clean. Check
balls and seats for nicks; replace
if neces -
sary. See manual 307-793.
5. Replace packings. See manual 307-793.
Also check piston valve seat for hardened
paint or nicks and replace
if necessary.
1. Replace pin
if missing. Be sure retaining
spring is fully
in groove all around con -
necting rod. See page 31,
2. Replace connecting rod assembly. See
page 30.
3. Check drive housing assembly for dam
-
age and replace if necessary. See page
32.
'YPE OF PROBLEM
spray pattern varlations.
WHAT TO CHECK
If check Is OK, go to the next check.
1. Be sure both G1 and G2 leads from
bridge (308) to circuit board (118) are
firmly connected. See page 26.
2. Check stall pressure. Refer to Calibra
-
tion procedure on page 28.
3. Check bourdon tube flag and detector
position. Turn pressure setting to
maxi-
tical detector slot of circuit board.
mum; flag
sho.uld not drag or bind in op-
CIRCUIT BOARD
''\ FLAG
4. Check circuit board (1 18) by substitut -
ing with a good board. See page 26.
5. Check LOW OUTPUT section on page
16.
WHAT TO DO
If check is not OK. refer to this column.
1. Reconnect securely. See page 26.
2. Calibrate pressure control. See page
3. Carefully bend flag into alignment with
detector
slot to see if that corrects prob -
lem. If not, replace bare pressure con -
trol assembly (301). Calibrate pressure
control after reassembly.
28.
4. Replace circuit board. See page 26.
307-670 17

Graco E Series Specifications

General

Brand	Graco
Model	E Series
Category	Paint Sprayer
Language	English