Brooks Instrument 5860i - Manual (Page 29)

4-5
Brooks ® Model 5860 i
Section 4 Maintenance
Installation and Operation Manual
X-TMF-5860i-MFM-eng
Part Number: 541B110AAG
November, 2008
1. Remove the three screws (8) attaching the electronics cover and
loosen the upper jack post on the D-Connector. Remove the
electronics cover (11).
2. Unplug the sensor connector from the PC Board. Remove the two
screws securing the bracket (13) and PC Board (2). Remove the
bracket and PC Board.
3. Remove the two screws (6) and washers (7) securing the sensor
assembly (3). Remove the sensor assembly.
Note: Do not attempt to disassemble the sensor assembly.
4. Remove the backup rings (5) and the sensor assembly O-rings (4)
from the flowmeter body (1). Using the Brooks O-ring removal tool
will help prevent scratching the sealing surface.
5. Remove the adapter fittings (15) from the flowmeter body (1).
6. Remove the restrictor assembly (9) from the inlet side of the
flowmeter body (1) using the restrictor tool (part of service tool kit
listed in Section 5, Table 5-2).
B. Assembly
Note: It is recommended that all O-rings be replaced during meter
assembly. All O-rings should be lightly lubricated with Fomblin lubricant
(part of O-ring kit, Section 5) prior to their installation.
1. Examine all parts for signs of wear or damage, replace as necessary.
2. Place the restrictor O-ring on the restrictor assembly. Screw the
restrictor assembly (9) into the inlet side of the flowmeter body using the
restrictor tool, hand tighten snug.
3. Press the lubricated sensor O-rings (4) into the flowmeter body (1).
Press the back up rings (5) into the O-ring cavity above the O-rings.
Be sure that the O-rings are seated squarely and the backup rings
are below the surface of the body. The back end of the O-ring
removal tool is useful to press the backup rings all the way into the
body.