Viking Pump TSM288: SL Series Lobe Pumps - Manual (Page 15)

fIGURE 28
2.01
2.02
fIGURE 27
4.01 3.01 4.07
fIGURE 29i
POsITION b POsITION a
lOCKNUT
Tab WasHER
fIGURE 29ii
2.02 2.01 5.18 5.17
fIGURE 29iii
5.17
SECTION TSM 288 ISSUE A PAGE 15 OF 36
4.1.4 ROTOR assEMblY
NOTE: For SLF Build see section 4.1.6
• Install the Rotors (2.01) and Rotor retainers (2.02)
4.1.5 sETTING fRONT
ClEaRaNCEs sla – sld
• Set the front clearance by adding / removing shim from
position B.
(See Figure 29i)
NOTE: If any shims are added (or removed) from position B
then the corresponding thickness of shims needs to be
removed (or added) to position A to maintain the bearing pre-
load. Adding additional shim in position B will reduce the front
clearance (See section 6.1 for Clearance Charts)
When the front clearance is set install the tab washer and
lock nut, bend one of the tabs onto the locknut to secure the
assembly.
4.1.6 sETTING fRONT ClEaRaNCE
slE aNd slf
• Install the clearance spacer (5.17), shaft sleeve (5.18), rotor
(2.01) and rotor retainer (2.02)
• The front clearance is set by machining the clearance spacer
(5.17)
• Using a depth micrometer check the front clearance (distance
from the front of the rotor to the front of the casing) and
adjust the width of the front clearance spacer as necessary
to set the front clearance see section 6.1 for pump head
clearances
NOTE: When assembling the pump with a new front
clearance spacer the rotor will be proud of the casing.
When the front clearance spacer has been machined to the
correct width make sure that the spacer kept with the respective
shaft.