SELWOOD SELTORQUE S150, Manual

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Selwood Seltorque S150 Manual
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2. Set actuator to top dead centre (maximum
distance from inner pump body), by rotating
engine shaft with starting handle. Using a tool that
will not cut the rubber (such as a blunt
screwdriver) and a lubricant (soap solution),
remove actuator seal (A18) by prising it from the
inner pump body (A19).
3. Remove actuator (A20) complete with seal from
drive rod (D37).
4. To renew actuator seal (A18):
a) Remove the failed component from the
actuator.
b) Insert firstly one side and then the other into
the actuator groove, using a blunt tool that will
not cut the rubber.
NOTES : The seal is handed and will not enter the
inner pump body (A19) if fitted the wrong way round.
The correct assembly position for actuator seal (A18)
is with the smaller diameter of its conical outer surface
towards the inner pump body (A19). It will be seen
that the housing in the body is tapered in the same
direction as the external surface of the seal.
5. At this stage it is advisable to examine the
condition of actuator neck seal (A21). This
component should be replaced if any splits are
evident on its visible surface. Refer to Section
5.1.4 Actuator Neck Seal (A21).
6. Smear soft soap on the outside section of new
actuator seal (A18). Lightly grease actuator bore.
Position actuator/seal assembly on drive rod
(D37), locate actuator screw (D36) and tighten to
60lb ft (8.3kgf m) torque.
7. Replace actuator valve if removed (A16) first
smearing soft soap on the conical end and groove
of actuator screw (D36). The new valve should be
eased into position by hand.
8. Before fitting outer pump body (A15), reciprocate
the actuator by fitting and rotating the engine's
starting handle about ten times to encourage
centralisation of the connecting rod bearings.
During this procedure, the actuator seal (A18) is
likely to rotate slightly in the inner pump body
(A19). Stop shaft rotation when actuator is at
bottom dead centre (minimum distance from inner
pump body).
9. Seat outside section of actuator seal in inner
pump body recess by gently tapping with a non-
metallic mallet.
10. Replace outer pump body assembly, and fit and
evenly tighten screws (A14) washers (A13) spring
washers (A12) and nuts (A11), by sequentially
turning each screw a small amount until they are
all fully tightened. It is important that the outside
diameter of the actuator seal (A18) should be
clamped evenly.
5.1.4 Actuator Neck Seal (A21)
Another reason for the pump set failing to prime
efficiently or to handle the expected volume of air,
could be failure of the actuator neck seal (A21).
To investigate and service, proceed as follows:
1. Remove outer pump body (A15) complete with
delivery valve assembly, and actuator (A20) with
actuator seal (A18) as directed in Section 5.1.3
Actuator Seal (A18) Instructions 1 and 2.
2. Release hose clip (A02) allowing air hose to be
disconnected from suction valve box (A03).
Screws (A22) should then be removed, leaving
washers (A23) in inner pump body (A19).
3. The inner pump body can now be pulled by hand
from the bearing housing, if necessary twisting to
overcome any tendency of the seal (A21) to stick
to drive rod (D37). Remove and discard failed
seal.
4. Smear new actuator neck seal (A21) with soft
soap to assist fitting, position in inner pump body
(A19) and push both components over drive rod
(D37) using assembly tool (Part No. 0015102000)
smeared with soft soap. Check that washers
(A23) are in place, and fit and fully tighten screws
(A22). The heads of these screws should be fully
contained within the recesses in the inner pump
body.
5. Reassemble remaining components in
accordance with Section 5.1.3 Actuator Seal (A18)
Instructions 6 to 10, inclusively.
5.1.5 Drive Rod Seal Assembly and Bearing
(A25 and A28)
If oil leaks from ports in housing (A24) it is probable
that seal assembly (A25) is excessively worn. Such a
condition may also indicate that drive rod bush (A28)
should be replaced.
To inspect and service, proceed as follows:
1. Drain oil from bearing housing by removing filler
cap (D08) and drain plug (D13).
2. Remove air pump components in accordance with
Section 5.1.3 Actuator Seal (A18) Instructions 1
and 2, and to Section 5.1.4 Actuator Neck Seal
(A21) Instructions 2 and 3.
3. Being careful not to damage the flat sealing faces
of housing (A24), carefully withdraw housing
complete with its bearing and sealing components
from bearing housing (D06) and drive rod (D37).
4. Examine condition of lip and distributor seals
together with bearing. If either are worn or
damaged, we recommend that a new housing
(Part No. 0010905000) complete with seal
assembly and bearing (A28) should be ordered
and fitted. However, individual components can
be renewed in accordance with the following
instructions.
5. To replace drive rod bearing (A28) carefully
remove circlip (A26) allowing seal components to
be pushed from housing with blunt punch or drift
from bearing end. The drive rod bearing can now
be removed using bearing drift (Part No.
0015168000) and the new component pressed
into position so that one face is flush with the end
of the housing.