Graco 239716, Instructions-Parts List Manual

Page: 9 / 18

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Maintenance
Cleaning or Servicing the Meter Chamber
WARNING
INJECTION HAZARD
To reduce the risk of an injection injury or other
serious injury, follow the Pressure Relief Proce-
dure on page 6 whenever you are instructed to
relieve pressure.
WARNING
FIRE, EXPLOSION, AND ELECTRIC
SHOCK HAZARD
Installing and servicing this equipment
requires access to parts that may cause
electric shock or other serious injury if
the work is not performed properly. Do not install or
service this equipment unless you are trained and
qualified.
Use only genuine Graco replacement parts. Sub-
stitution of components may impair intrinsic safety.
This could result in a failure which causes serious
injury and/or substantial property damage.
NOTE: Clean and service the meter at a clean work-
bench. Use only lint-free cloth on parts.
1. Follow the Pressure Relief Procedure, on page
6. Then close the fluid shut-off valve on each side
of the meter.
2. Disconnect the cable from the electronic sensor
device.
3. Disconnect both fluid line fittings and remove the
meter from the fluid line.
4. Loosen the two screws and remove the electronic
sensor device from the flow meter upper housing.
See the parts drawing, page 10.
5. Loosen the screws. Keep a few threads of two
opposing bolts engaged to minimize the torque
stress on the shafts when you separate the meter
housings.
6. Hold onto the upper housing and gently tap the
opposing bolts to separate the lower housing.
CAUTION
To avoid damaging the shafts, keep the housings
parallel to each other when separating them; do not
rock the housings from side to side. Do not use
chisels or screwdrivers to split and pry apart the
housings.
7. Remove and inspect the gears and shafts. Clean
the meter parts with solvent.
8. Reassemble the gears and shafts into the lower
housing in the position they were removed from.
Check the gears for free and easy rotation.
9. Make sure the two locating pins are in place.
10. Assemble the two meter housings, making sure to
keep them parallel to each other.
11. Install the screws. Tighten them oppositely and
evenly, to 12 ft-lb (16 N m). Do not over-tighten.
12. After re-assembling the meter, test the gear rota-
tion by applying a brief air blast to the meter inlet.
You should clearly hear the gears spin.
13. Set the electronic sensor on the upper housing
and tighten the two screws hand-tight, about 3.5
ft-lbs (4.7 N
m). Do not over-tighten.