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8.2 ASSEMBLY OF 3200C SERIES BOOSTERS
The assembly procedure is generally the same for all series, but where there are differences, notations are
made. All vacuum joints, end covers, seal casings, and plugs should be sealed with an RTV Silicone Sealer
equal, unless O-rings have been provided.
Gaskets are never used between rotor housing and end plates. Dowel pins are used to locate end plates,
housing, and drive end cover in proper location relative to each other. Be sure they are in place.
It is recommended that the gear end rotor shaft bearings be purchased from Tuthill Vacuum and Blower
Systems, as they are specially ground to locate the rotors with correct end clearance relative to the gear end
plate. Do not use standard bearings which have not been flush ground within .001” (.025 mm) tolerance.
Use factory approved parts.
It is suggested that long feeler gauges (12” or 30 cm) be used to check the interlobe timing, preferably (2)
.006” (.15 mm), (1) .005” (.13 mm), (1) .004” (.10 mm), and (1) .003 (.08 mm). This will give you all the
combinations from .003” (.08 mm) to .021” (.53 mm) and also .024” (.61 mm) which is the total.
8.2.1 PREPARATION OF END PLATES FOR ASSEMBLY
1. Remove all nicks, scratches, etc. from all sealing
surfaces. Clean all parts thoroughly. See seal
pressing tool drawing (T32018) on page 44.
2.
90/91 Series
- Press in new labyrinth seals [51]
into bores of both end plates [4] making sure
the scalloped areas of seal case are aligned
with openings in vent area of seal bore. Coat
O.D. of mechanical seal with sealer and press
into seal bore, coming to rest on top of labyrinth
seal. Make sure seals are fully seated without
deforming case. Keep sealer from carbon surface. Carefully wipe carbon with soft tissue and cleaning
agent (acetone) before continuing assembly.
92/93 Series
- Press in new oil slinger stators [79] if required.
8.2.2 GEAR END ASSEMBLY
3. Stand rotors [1] on arbor press table with gear end shafts up. See Figure 9. Two keyways should point
in the same direction, to the right.
4. Carefully install gear end plate over rotor shafts.
NOTE
The drive rotor should always be on the left side. Make sure the end plate
feet are facing in the proper direction so the assembled unit will have the
same drive shaft location as before.
5.
90/91 Series
- Some earlier models used an O-ring [314] under the mating portion of the mechanical seal. This
has been discontinued and O-rings should not be used with newly purchased seals. Check lapped surface
of seal mating ring to be sure it is perfectly clean. Use soft tissue and cleaning agent if necessary. Place a few
drops of lubricating oil on its surface and install on shaft with lapped surface coming to rest on top of carbon.
Gently press with fingers to insure compression is taking place and ring is not hung up for any reason.
92/93 Series -
Slide seal slinger [238] over shaft. Also install spacer [129] if two piece.
Figure 9 - Keyways position
DRIVE
Keyways
Facing
Same
Direction
Содержание M-D Pneumatics 7010
Страница 43: ...43 NOTES ...
Страница 50: ...50 3200C CUTAWAY DRAWING 3200 90C 91C 92C 93C 1 OF 2 A ...
Страница 51: ...51 3200C CONFIGURATIONS DRAWINGS 3200 90C 91C 92C 93C 2 of 2 A ...
Страница 54: ...54 5500C CUTAWAY DRAWING 5500 90C 91C 92C 93C 1 OF 2 E OIL LEVEL SIGHT GAUGE DETAIL ...
Страница 55: ...55 5500C CONFIGURATIONS DRAWINGS 5500 90C 91C 92C 93C 2 of 2 E ...
Страница 56: ...56 7000C CUTAWAY DRAWING 7000 90C 91C 1 OF 3 ...
Страница 57: ...57 7000C CONFIGURATIONS DRAWING 7000 90C 2 OF 3 ...
Страница 58: ...58 7000C CONFIGURATIONS DRAWING 7000 91C 3 OF 3 7000 91C 7013 SHOWN ...
Страница 68: ...68 NOTES ...