Micropump GM Series Service Instructions User Manual
Page 8
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 8 of 9
Note: Pumps with Teflon o-rings may require screws to be tightened 2 to 3
times, due to the hardness of the Teflon material.
7.10
If an elastomer o-ring is used, apply a light even film of Dow Corning
vacuum grease or equivalent (do not use on Teflon seals). Apply grease from capsule to
the thumb and index finger of one hand, and transfer a light even film to the surface by
rubbing o-ring between thumb and index finger. Check that entire surface of o-ring is
coated with vacuum grease.
7.11 Install one o-ring (11) into the pump body (10) o-ring groove. Teflon
o-rings may require slight stretching in order to fit into grooves.
7.12
Position driven magnet (12) on driving gear (6) shaft, aligning magnet set
screw with flat of shaft. Locate driven magnet at a set height of .375” (9.5
mm) as shown in Figure 1, and tighten set screw on flat of shaft.
7.13
Check that driven magnet (12) is free of metal particles (see cleaning
instructions, section 5). Check that driving gear (6) shaft rotates
without sticking (see repair instructions, section 6.5.5).
7.14
Install magnet cup (13) over driven magnet (12), onto o-ring (11) in pump
body.
7.15
Complete the pump assembly with 16 screws (15) (8 screws for low
pressure version) installed through the drive housing (14) and into the
pump body (10). Torque to 30-35 in-lbs It is advised to apply a light oil
to screw threads and under screw head before installation.
7.16
Check that all screws are seated. There should not be any gaps between
mating parts.
8
Pump to Motor Assembly
8.1
The hub assembly should be attached to the motor shaft using key and set
screw. The hub assembly is designed so that when placed on the motor
shaft it will automatically bottom out at the proper setting
8.2
Install pump assembly onto motor. Care should be taken to disallow the
hub assembly from impacting the magnet cup due to high magnetic
attraction.