SELWOOD SELTORQUE S150, Manual

Page: 9 / 62

Selwood Seltorque S150 Manual
9
6. Ensure that seal components are assembled in
accordance with the following instructions.
a) The wiper seal (A34) is first assembled to the
drive rod seal carrier (A32) using wiper seal
insertion tool (Part No. 0010103000) ensuring
the correct orientation.
b) Then the internal distributor seal (A33) is
offered up to the bearing and seal housing
(A24) ensuring again the correct orientation
and pushed into place with the drive rod seal
carrier (Part No 0015195000) together with
wiper seal (A34)) and the whole pressed into
place with the wiper seal insertion tool (Part
No. 0010103000). Care must be exercised
when replacing circlip (A26) to ensure that the
lip of the wiper seal (A34) is not damaged by
the hand tools used. Refer to Section 6.4.
7. Before replacing bearing/seal housing assembly,
check condition of drive rod, particularly if new
bush (A28) has been fitted. If surface is
significantly worn, the drive rod should be
replaced in accordance with instructions given in
Section 5.4 Maintenance of Flushing Chamber, Air
Pump Mechanism, Drive Coupling, Drive Shaft
Bearings and Lip Seal. Specifically Section 5.4.2.
8. Assembly tool (Part No. 0015101000) must be
used when replacing bearing/ seal housing
assembly to ensure that the wiping edges of the
seal assembly (A25) are not damaged. The drive
rod must be smeared with clean oil to assist this
procedure. See Section 6.5. Gasket (A27) must
be renewed. Always use a component supplied
by Selwood Ltd. Ensure that ports in housing
(A24) are in the 3 and 9 o'clock positions.
9. Reassemble remaining pump components in
accordance with Section 5.1.4 Actuator Neck Seal
(A21) Instruction 4 and 5.1.3 Actuator Seal (A18)
Instructions 6 to 10, inclusively.
10. Replace drain plug (D13) together with sealing
washer (D14) and refill bearing housing (D06) with
clean oil to level of plug (D08) and replace plug
together with ‘O’ ring (D07). Refer to Section 3.1
Pump Lubrication for details of the oil required for
the Bearing Housing.
5.2 Separator Maintenance
5.2.1 Float (B11)
If water in significant quantities continuously passes
through the exhaust valve (A07) of the air pump, it is
probable that the float (B11) is in need of replacement.
To inspect and service, proceed as follows:
1. Disconnect air hose (A01) by loosening hose clip
(A02), and twin prime (A40) by loosening hose clip
(A02).
2. Remove nuts (A11) and washers (A12) and lift off
separator cap (B01) complete with peel
valve/upper diffuser assembly (B01) to (B21),
inclusively.
3. Examine condition of float (B11) and replace with
new component if punctured or significantly worn.
4. Check condition of peel valve rubber (B21) and
bush (B07) replacing them, if necessary, in
accordance with Section 5.2.2 Peel Valve (B21).
Also check for deposits of solids likely to interfere
with the smooth working of the float system.
5. When fitting a new float, ensure that it is securely
tightened against nut (B12). During this procedure
the float should be positioned on the rod so that
the operating plate (B15) with its associated peel
valve fasteners is just clear of the central clamp
bar screws (B16), when the float is located in the
upper diffuser cone.
6. If all components are seen to be in satisfactory
condition, replace separator cap assembly,
washers (A12) and nuts (A11). Alternately tighten
each nut a small amount to ensure that the cap is
pulled down evenly. Do not over tighten. Replace
air hose(s) and re-tension hose clip (A02).
5.2.2 Peel Valve (B21)
If significant quantities of water are discharged from
the exhaust valve (A07) of the air pump, and the float
(B11) is in satisfactory condition, it is probable that a
fault exists in the peel valve assembly.
To inspect and service, proceed as follows:
1. Remove separator cap sub-assembly (B01) to
(B21) and unscrew float (B11) and nut (B12).
2. Release screws (B09) and spring washers (B10)
to allow upper diffuser/valve assembly to be
withdrawn.
3. Remove screws (B04) and sealing washers (B05)
to allow upper diffuser (B06) to be removed from
the port plate sub-assembly.
4. Examine condition of peel valve rubber (B21) and
air ports In plate (B03) which it should completely
cover when the float is fully raised. If the rubber
does not seat correctly, is distorted, or in any way
damaged, it must be removed and discarded by
releasing screws (B16).
5. To fit new peel valve rubber (B21):
a) Carefully clean existing parts thoroughly,
especially surfaces of port plate (B03), and
clamp bars (B19) and position new rubber on
plate.
b) Assemble screws (B16), clamp bar (B19),
clamp bar seal (B20), washer (B18) and nuts
(B17) in sequence shown on drawing.
Alternately tighten each nut a small amount to
ensure that even clamping pressure is
produced. Correctly tightened nuts will not
cause the clamp bar to distort the rubber.
6. Carefully attach the ends of the valve rubber (B21)
to the operating plate (B15), noting that the
components and method of assembly are identical
to those described in Instruction 5 of this Section
except that clamp bar seal (B20) is omitted.
Again, ensure that the nuts are not over tightened.