User's Manual

12 308968
Maintenance
Disassembly
WARNING
INJECTION HAZARD
To reduce the risk of an injection injury or other
serious injury, follow the Pressure Relief Proce-
dure on page 8 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
8. Then close the fluid shut-off valve on each side
of the meter.
2. Remove the sensor (140) by releasing the locknut
and removing the sensor from the flow meter
housing.
3. Loosen the six bolts (20) at the sensor end (60) of
the flow meter.
4. Remove four of the six bolts, keeping two opposite
bolts engaged by several threads.
CAUTION
To avoid damaging the shafts (80 and 90), 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.
5. Hold the upper housing (60) at the sensor end and
gently tap on the two bolts, alternately, to separate
the lower housing (70).
6. Remove the last two bolts (20) and carefully
separate the two sections completely.
7. Remove and inspect the helical gears (80 and 90),
the sleeve bearing (120) and the sleeve (110) by
lifting the gears straight out.
8. Check that the ball bearings (100) do not fall out.
9. Unscrew the housing bolts (10) and remove the
inlet housing (50).
Inspection
1. Inspect the gears
2. Inspect the housing
3. Check the o–ring (30) condition, replace the o–ring
if necessary
Assembly
1. With the lower housing (70) inlet side pointing up,
check that the o–ring is seated snugly and screw
the inlet housing (50) on hand tight. Make sure the
two index marks on the housing line up.
2. Install the second o–ring (30) in its groove.
3. With the upper housing (60) facing up, insert the
large helical gear (80), including the donut bearing
into the opening with the tooth gear end going first.
4. Raise the gear until the spacer sleeve (110) can be
placed into the same hole above the donut bear-
ing.
5. Press the sleeve down until it sits flush in the
housing.
6. Install sleeve bearing (120) into its hole, lifting the
gear if necessary.
7. Insert the small helical gear (90) into the sleeve
bearing, making sure that the two helical gears
mesh with each other.
8. Line up the holes in the lower housing (70) with the
gears, and carefully slide the housing over the
gears.
9. Insert two opposing bolts (20) and alternately
tighten each down until the two housing parts (60
and 70) are together.
10. Insert and tighten the remaining four bolts (20).