SPP Pumps Auto Prime Medium Head Open Set - AC & AL Range - Manual (Page 15)

Operators Handbook for
Diesel Driven Pump Sets
Manual No/Rev
W72-002E / 11
Our policy is one of continuous improvement and we reserve the right to alter specifications at any time
Page 15 of 16
8. FAULT FINDING GUIDE
Disconnect suction hose
Blank off suction entry
Fit vacuum gauge
Pump Fails to Prime
Reading
between
85 - 89 .5 kpa
(28.5 0 30 ft H20)?
Are
all plugs
tight?
Lift< or =
6.1m (20ft) for AC50/75
8.53m (28ft) for AC80/100
9.75m (32ft) for others?
Type of
unit?
Check vertical
suction lift
Are hoses
leaking, collapsed
or blocked?
Is intake
blocked?
Rectify
Test the Vacuum
Pump directly
Fit Vacuum Gauge
Reading
between
85 - 89 .5 kpa
(28.5 0 30 ft H20)?
NO YES
Move
Pump
NO
Rectify
NO
NO
Is impeller
blocked?
Rectify
Rectify
Rectify
YES
YES
YES
YES
YES
NO
AC
50/75
Is the
mini ball valve
open?
NO
YES
YES
Rectify
NO
Is reflux
ball seating
properly?
Is oil level
correct?
NO
Is belt drive
tension OK?
YES Rectify
NO
Rectify
NO
YES
Excessive wear.
Remove pump &
either overhaul or fit
new or exchange
Vacuum Pump
YES
Rectify NO
Is vacuum
pressure seal
leaking?
YES
Rectify
OTHERS
Is the
pump or NRV
blocked or
damaged?
YES
NO
Rectify NO
Are all
joints sound &
leak free?
YES
Rectify NO
Is float
gear free and
intact?
YES
Is pump
casing free from
holes?
Check impeller wear
plate clearances
and rectify
NO Rectify
YES
Is Vacuum
Pump filter
blocked?
YES
NO
Rectify