Micropump GM Series Service Instructions - Manual (Page 3)

MICROPUMP, INC.
A Unit of IDEX Corporation
PO Box 8975, Vancouver, WA 98668-8975 • Phone: 360/253-2008 • Fax: 360/253-8294
MICROPUMP LIMITED
A Subsidiary of Micropump, Inc.
Howard Road, Eaton Socon, St. Neots, Cambridgeshire, PE 19 8ET England, • Phone: (44) (0) 1480-356600• Fax: (44) (0) 1480-35630 0
REVISION
LTR. DESCRIPTION DATE BY
A ORIGINATED PER E14164 1/28/04 CMA
PART NUMBER: L23154
Page 3 of 9
Note: Remove bushings and O-
rings ONLY if replacement is necessary.
4.
Inspection of Pump Components
4.1 Magnet Cup (10)
4.1.1 Visually check the outside of the magnet cup (13) for rub marks on the
back and sides. Marks on the back indicate that the hub assembly is
misaligned axially. Marks on the sides indicate radial misalignment.
4.1.2 Visually check the inside surfaces of the magnet cup (13) for rub marks. Marks on
the bottom surface indicate that either the driven magnet (12) or hub assembly is
misaligned. See section 7.12 for driven magnet (12)
installation. See section
8.1 for hub assembly installation. Marks on the insides of the magnet cup (13)
indicate radial misalignment of the driven magnet (12), refer to section 6.2.
4.2 Driven Magnet (12)
4.2.1 Visually check the driven magnet (12) for wear on the outside shell; refer to section
6.2.
4.2.2 Visually check the driven magnet (12) for metal particles. See cleaning instructions,
section 5.
4.3 Driving gear (6) and driven gear (7)
4.3.1
Visually check the gear teeth on both gears for pits, wear, or damage.
Replace both gears if either gear is damaged or worn.
4.3.2 Visually check gear shafts for wear, pits, scoring, or corrosion. Light wear marks on
shaft circumference will not normally impede the operation of the pump. Replace
both gears if either gear shafts are scored or damaged.
Note: ALWAYS replace all bushings if either gear shaft is worn or damaged.
4.4 Bearing plate (2) (Section 4.4.1 applies when wear plates not used)
4.4.1 Visually check the bearing plate (2) surface that contacts the gears for scoring. Refer
to section 6.4.
4.4.2
Visually check the bearing plate lube holes for debris. See cleaning instructions,
section 5.