SPP Pumps Auto Prime Q Series - Workshop Manual - Manual (Page 10)

Manual No/Rev
W72-021E / 8
Workshop Manual for
AUTOPRIME Q Range Pump Units
Our policy is one of continuous improvement and we reserve the right to alter specifications at any time
Page 10 of 36
6.5 Louver and Front Panel Removal
(Refer to Parts Diagram 7.14.3)
Note: To gain access to pump and priming tank,
the front panel and louver may be removed
without removal of the canopy.
1. Remove the 2 bolts (A) holding the front
canopy frame to the shroud supports on the
chassis.
2. Open both doors, remove the nuts (B) from
the studs in each upper corner of the
middle canopy support frame.
3. Pull the louver and front panel complete
with the support frame forward and lift off to
expose the pump.
4. If required the front shroud may also be
removed to give access to the pump
suction end for maintenance of the non-
return valve, priming tank and impeller.
6.6 Canopy Removal Procedure
(Refer to Parts Diagram 7.14.3)
1. Open both doors, remove the drive belt
guard, separate the internal sound baffle
into two halves and detach each half from
the canopy support frame. The baffle
halves may be secured temporarily to the
canopy frame, unless further disassembly is
necessary.
2. Disconnect the air supply hose from the
engine manifold by removal of the hose clip
and remove the short exhaust pipe to allow
lifting of the canopy.
3. Where speed control has been fitted,
disconnect the cable from the engine
throttle lever.
4. Disconnect the fuel tank vent pipe from the
fuel tank end.
5. Remove the 6 retaining screws (3), close
doors and lift off the canopy assembly
complete taking care to ensure that any
additional hoses or wires have been
disconnected.
6.7 Pump & Engine Unit Removal
1. Disconnect the fuel and return lines from
the fuel tank.
2. Connect crane hook to the lifter provided
and apply light pull just sufficient to take up
the slack in the crane cables.
3. Remove the 4 bolts from the engine and
pump mountings, and confirm that the
pump and engine assembly is free to be
lifted.
4. Lift the pump and engine assembly with
care and either pull away the chassis
assembly or move the engine and pump
unit to a suitable location for further
disassembly.
5. Place this unit on a sturdy low bench and
support the engine and pump end
separately.
6. Remove 8 nuts from the studs on the
suction flange and remove the priming tank
assembly complete from the pump.
7. Slacken the belt tension device and lift the
belts off the vacuum pump pulleys.
8. Remove the 4 screws and remove the
coalescer assembly complete with vacuum
pump from the pump.
9. Support the engine and pump to prevent
toppling and remove the 16 screws from the
flywheel housing to separate the pump from
the engine.
10. At this stage it is possible to disassemble
the lifter assembly and the drive pulley
arrangement for maintenance if required.
Refer to the parts diagram 7.12.1.
11. Similarly it is possible to replace the drive
coupling components if required, as these
are accessible in the flywheel housing on
the engine. Refer to the parts diagram
7.9.2.
6.8 Pump Disassembly Procedure
(Refer to Parts Diagram 7.3.2)
1. Drain the seal lubrication system into a
suitable container by removal of the lower
hose connection.
2. Remove any remaining nuts from the studs
on the suction flange of the pump casing.
3. Using a soft faced mallet tap the outer
diameter of the front wear plate and
withdraw it from the pump casing.
4. Lock the shaft with a C spanner and
remove the socket cap screw from the
centre of the impeller.
5. Tap the impeller lightly with a soft-faced
mallet on the outer diameter to break the
taper joint and withdraw the impeller from
the shaft. Remove the taper key and store
for carefully for reuse.
6. With a pair of circlip pliers, withdraw the
mechanical seal retaining circlip from the
shaft. Carefully withdraw the rotating part of