SPP Pumps Auto Prime Medium Head Open Set - ACE Range - Manual (Page 8)

Manual No/Rev
W72-019E / 4
Operators Instructions for
ACE80/100 Diesel Driven Centrifugal Pumps
Our policy is one of continuous improvement and we reserve the right to alter specifications at any time
Page 8 of 12
7.5 Mechanical Seal Assembly
7.5.1 Assemble the engine adaptor plate on to
the engine and press the stationary seat in
to the plate ensuring not to damage the
face. Replace the rotating part of the seal
preferably with SPP tool no 22743 and push
it up until the circlip groove is exposed
behind the seal. Replace the circlip washer
and circlip and ensure the mechanical seal
is securely in place and against the washer.
7.5.2 Assemble the back wear plate onto the
engine adaptor and press the mechanical
seal seat into the wear plate. Replace the
rotating part of the seal so that the faces
meet. Assemble the impeller with the
reused shims and tap with a mallet to
tighten.
7.5.3 Assemble the non-return valve and volute.
Ensure that the impeller still moves without
touching the wearplate. Measure the
clearance between the wearplates and the
impeller and if they do not fall within the
range specified in the table in Section 9,
then shim as necessary to avoid loss of
efficiency.
7.5.4 Replace the Tee piece and priming tank
and tighten mechanical seal oil plug. Add
oil as indicated on dipstick
7.6 Non-Return Valve
7.6.1 A ball type non-return valve is fitted to the
pump discharge.
7.6.2 The ball should be regularly checked for
freedom of movement and absence of
debris by inspection through the discharge.
7.6.3 The correct seating of the ball can be
checked through the delivery flange of the
valve body. The valve body should be
removed to check the seat for damage or
wear.
7.7 VACUUM PUMP
Vacuum pump overhaul is beyond the
scope of this manual. Should the vacuum
pump be suspect then it is recommended
that an exchange unit is fitted and the
suspect unit returned to the manufacturers
for examination.
7.8 Vacuum Pump Air Filter
7.7.1 Air filters are located in the valve cover of
the primary tank and should be checked
regularly for cleanliness, distortion or
damage see the figure below. Replace if
distorted or damaged.
AIR FILTER
25PTFLTA
Air Filter Location
7.7.2 To remove the air filter undo the central nut
holding the air filter cover and remove to
expose the filter element.
7.9 Valve Gear
The valve assemblies are shown below.
The valves, seats and pins should be
checked regularly for wear or damage.
Worn parts should be replaced. The main
valve is located on the underside of the top
cover.
M4 SELF LOCK NUT
NYLON WASHER
AIR INLET VALVE
O RING
MAIN INLET VALVE
VALVE SEAT
M4 WASHER
SPRING
DIAPHRAGM
VALVE ROD
GASKET
M6 CAPSCREW
M6 WASHER
FULCRUM BRACKET
AIR OUTLET VALVE
FULCRUM ARM
FULCRUM PIN
M8 WASHER
M10 STARLOCK WASHER
M8 SELF LOCK NUT
VALVE SUPPORT PIN
M6 STARLOCK WASHER
Main Valve Assembly
VALVE SEAT
VALVE SPINDLE
KNOB (NOT SHOWN)
VALVE
M8 WASHER
DISTANCE PIECE
SPRING RETAINER
KLIP RING
KLIP RING
SPRING
Surge Control Valve Assembly