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5.2.2.1 Check that rotor turns freely. If bearings appear tight, see Repair.
5.2.2.2 Check rotor shaft for setscrew marks other than on flat. If such marks
5.2.3 Stator Condition
5.2.3.1 Perform motor winding test given in Testing and Troubleshooting. If stator
5.2.3.2 Motor should be returned to Micropump for any further testing.
6. Repair
6.1 Tools and Materials
6.1.1 The following tools and materials may be required to effect repairs:
6.1.1.1 One (1) each 6-32 tap.
6.1.1.2 One (1) each bushing insertion tool. Refer to Special Tools.)
6.2 Pump Assembly
6.2.1 Repair of pump assembly is limited to replacing parts.
6.2.1.1 Replacement of O-rings is recommended each time pump is
6.2.1.2 Replace any parts that show physical damage such as cracks, breaks
6.2.1.3 Replace body and/or pump assembly if interior or lip of any hole is
6.2.1.4 Replace inlet screen if it is corroded.
6.2.1.5 Replace ball in flow sensor/system check/over-pressure valve assembly if
6.2.2 Bushing replacement (Refer to Figure 2 in IPL.)
6.2.2.1 To remove bushing, run 6-32 tap into bushing three or four turns and pull
PO Box 8975, Vancouver, WA 98668-8975 • Phone: 360/253-2008 • Fax: 360/253-8294
2 Howard Road, Eaton Socon, St.
are found, check for bent rotor shaft. Refer to Repair.
windings do not pass test, refer to Repair.
disassembled. (Included in P/N 81257 Service Kit.)
Note: Actual replacement may be based on in-service experience.
and scarring.
damaged.
it is hard.
bushing out.
MICROPUMP, INC.
A Unit of IDEX Corporation
MICROPUMP
A Subsidiary of Micropump, Inc.
Neots, Cambridgeshire, PE 19 8ET England, • Phone: 011-44-1480-356600 • Fax: 011-44-
LIMITED
356300
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