Graco HG6000 [10/20] Assembly
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Graco HG6000 [10/20] Assembly

Maintenance
10 309834T
5. Hold the end housing (1) and gently alternately tap
on the two screws (2) with a hammer to separate
the middle housing (11).
6. Remove the last two screws (2) and carefully sepa-
rate the end (1) and middle housings (11) com-
pletely.
7. Remove and inspect the helical gear assemblies (4
& 8), gear bearings (5 & 7), and gear spacer (9) by
lifting the gears straight out.
8. Check that the ball bearings (6) and dowel pins (13)
did not fall out of their locations.
9. Unscrew the six M8 screws (15) and remove the
end cap (14).
Inspection
1. Inspect the gears, shafts and bearings.
2. Inspect the housings.
3. Check the o-ring (12) condition, replace the o-ring if
necessary.
4. Clean the meter parts with compatible solvent.
Assembly
1. With the middle housing (11) inlet side pointing up,
check that the o-ring (12) is seated snugly on the
end cap (14). Screw the end cap (14) to the middle
housing (11) using M8 screws (15) and hand
tighten. Make sure the four index holes on the hous-
ing line up. Torque the six screws (15) to 350 +/- 15
in-lb. (39.5 +/- 1.7 N•m). Do not overtighten.
2. Flip the middle housing (11) and end cap (14), so
the outlet side is facing up. Check that o-ring (12) is
seated snugly in its groove.
3. With the end housing (1) facing up, insert the
2-tooth helical gear assembly (4) including the cen-
tering spacer bearing into the larger bore of the end
housing (1) with the spur gear end going first.
4. Slide the shaft spacer (9) over the 2-tooth helical
gear (4) and place it into the large bore of the end
housing (1) above the centering spacer bearing.
5. Press the shaft spacer (9) down until it sits flush in
the end housing (1).
6. Install the gear bearing (5) into its hole in the end
cap (1), lifting the 2-tooth helical gear (4) if neces-
sary.
7. Insert the 3-tooth helical gear (8) into the gear bear-
ing (5), making sure the two helical gears mesh with
each other.
8. Line up the holes in the middle housing (11) with the
helical gears, and carefully slide the housing over
the gears.
Use locating dowel pins (13). Choose dowel length
based on the depth of the dowel holes in the
housings. If both housings have 0.19 in. deep dowel
holes, use 0.312 in. dowels. If one housing has 0.19
in. deep dowel holes and the other housing has 0.4
in. deep dowel holes, use 0.55 in. dowels. If both
housings have 0.4 in. deep dowel holes, use.75 in.
dowels.
9. Insert the two opposing screws (2) in the end hous-
ing (1) and alternately tighten each down until the
two housing parts (1 and 11) are together.
10. Insert and tighten the remaining four screws (2) in
the end housing (1).
11. Torque the six screws (2) in the end housing (1) to
350 +/- in-lb (39.5 +/- 1.7 N•m). Do not over-
tighten.Assemble the sensor assembly (19) and
sensor pad (17) to the flow meter using M4 screws
(18 & 20). Tighten the M4 screws (18 & 20) to 42 +/-
15 in-lb (4.75 +/- 1.7 N•m). Do not overtighten.

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