Viking Pump TSM285: Classic+ Lobe Pump - Manual (Page 16)

SECTION TSM 285 ISSUE A PAGE 16 OF 36
- CP10 Pumps Only - Timing marks and gear marks ‘D’ and
‘L’ on gears (5.09) should be visible when viewed on the
drive end of the drive shaft.
- CP20 and CP30 Pumps Only - Timing marks and gear
marks ‘D’ and ‘L’ on gears (5.09) should be visible when
viewed on the drive end of the shafts (5.01 and 5.02), and
the tapered shoulder on the gear (5.09) should face the
bearings (5.05).
- Install gears (5.09) to shafts (5.01 and 5.02). Gear marked
‘D’ should be installed to drive shaft (5.01). Gear marked
‘L’ should be installed to lay shaft (5.02) ensuring correct
alignment of timing marks, see Figure 26.
- CP10 and CP20 Pumps Only - Install tab washers (5.11)
and lock nuts (5.12) tightened to correct torque, refer to
section 8.2. Do not secure tab washers (5.11).
- CP30 Pumps Only - Install locknuts (5.12) and tighten to
correct torque (refer to section 8.2).
Install, but do not tighten lock-screws (5.12) which are fitted
in the locknuts (5.12).
- After adjusting shim (5.04) check rotor front face alignment
and rolling torque.
- Remove rotor retainers’ (2.02) and rotors (2.01).
- CP10 Pumps Only - Install spacers (5.16) and gear keys
(5.10) to shafts (5.01 and 5.02).
- CP20 and CP30 Pumps Only - Install gear keys (5.10) to
shafts (5.01 and 5.02).
- Install rotors (2.01) and rotor retainers (2.02)
- Check mesh clearance against the Clearance Chart (refer to
section 8.1).
- To adjust mesh clearance shims (5.08) will need to be inserted
between the spacer (5.16) and the gear (5.09). As a guide for
a mesh clearance change of one unit (say 0.1mm or 0.004”),
shims (5.08) of four units’ thickness (say 0.4mm or 0.016”)
need to be inserted. Further, for clockwise movement of the
rotor (when viewed from the rotor end) insert shim (5.08) in
between the spacer (5.16) on the CP10; or bearing (5.05) on
the CP20 and CP30; and the gear (5.09) having a right hand
helix, and vice versa, see Figure 27.
- Having installed shim (5.08) ensure lock nuts (5.12) are
tightened to correct torque (refer to section 8.2), before
checking mesh clearance (refer to section 8.1).
- CP10 and CP20 Pumps Only - Having achieved optimum
mesh clearances the tab washers’ (5.11) can be secured.
- CP30 Pump Only - Having achieved optimum mesh
clearances the lock screws in the locknuts (5.12) can be
secured.
- Remove rotor retainers’ (2.02) and rotors (2.01).
- Install bearing (6.02) inner races to shafts (5.01 and 5.02),
positioning against shoulder on shaft.
- Install inner retaining rings (6.01), bearing (6.02) outers, outer
retaining rings (6.01), lipseal (6.03), blanking cap (6.04), filler
plug (6.10), sight glass (6.07) and drain plug (6.09) to cover
(6.00).
- Install cover (6.00) to bearing housing (4.01) with gasket
(6.05), locating on dowels (6.06), and secure with screws
(6.11) tightened to correct torque, refer to section 8.2.
4.1.5 CP10, CP20 AND CP30 CASING,
ROTOR AND HEAD ASSEMbLy
- see Figure 15 for CP10.
- see Figure 16 for CP20 and CP30.
- Install casing (3.01) to bearing housing (4.01) locating on
dowels (4.03).
- CP10 Pump Only - Secure casing (3.01) in position with
nuts (1.03) using four temporary spacers (12mm long x 9mm
bore or 0.472” long x 0.354” bore).
figure 25
Rotor / bearing abutment setting