SPP Pumps Auto Prime Medium Head Open Set - AL Range - Manual (Page 9)

Operators Instructions for
AL100 & 150 Diesel Driven Centrifugal Pumps
Manual No/Rev
W72-025E / 3
Our policy is one of continuous improvement and we reserve the right to alter specifications at any time
Page 9 of 12
VACUUM PUMP NUTS
FORCE
DEFLECTION
Belt Tensioning
Note: DO NOT OVERTIGHTEN BELTS
UNDER ANY CIRCUMSTANCES.
7.4 Mechanical Seals
1. Ensure that the coolant/lubricant level is
maintained. It is imperative that the seals
are never run dry. Immediate seal failure
will result.
2. Any contamination of the fluid should be
investigated immediately. Should a large
loss of fluid be experienced then the pump
must be stopped immediately.
3. Replacement of the seals is considered a
workshop operation where higher standards
of cleanliness can be maintained and the
specialised tooling required is more readily
available.
7.5 Non-Return Valve
1. A ball type non-return valve is fitted to the
pump discharge.
2. The ball should be regularly checked for
freedom of movement and absence of
debris by inspection through the discharge.
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.
7.6 Pump Bearings
1. The pump ends employ grease lubricated
bearings which will give long service life
provided they are:-
a) Correctly lubricated at regular intervals
b) Cleaned and, if removed, refitted with care
c) Serviced with clean tools and in a clean
area.
2.
The early stages of bearing failure can be
detected by noting either unusual vibration,
bearing housing temperature rise or unduly
noisy operation. If any of these signs are
notice, the pump should be stopped and the
cause investigated.
3.
Greased bearings are pre-packed with
lubricant
during pump manufacture.
Shrinkage and normal loss of grease
necessitates
re-lubrication at regular
intervals. These intervals will largely be
determined
by site conditions. The
recommendations given below are therefore
for guidance only.
Radial Bearing
Non drive end
(NDE)
Radial & Thrust
Bearing
Drive end (DE)
4 months
3000 hrs
4 weeks
750 hrs
4. The table is based on running speeds of
1450rpm with a bearing temperature not
exceeding 70°C. Reduce the interval by half
for every 15°C above 70°C.
5.
Clean both the grease fittings and grease
gun nozzle before use. For a hand grease
gun apply 2 or 3 strokes to each nipple.
6.
Overfilling can be as harmful to bearings as
under-lubrication. Compaction of grease
leads to it being churned by the rolling
action of the bearings. This leads to
overheating, breakdown of the lubricant and
bearing failure.
7.
Immediately after re-lubrication it is normal
for the temperature of the bearing housing
to rise in service. The temperature should
soon drop to normal after a short period of
running.
If the temperature remains
elevated or continues to rise, temporarily
remove the grease nipples and allow any
excess grease to escape.
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 Standard Vacuum Pump Air Filter
Standard air filters are located in the valve
cover of the primary tank and should be
checked regularly for cleanliness, distortion
or damage (see Figure 7-5, Figure 7-6,
Figure 7-7). Replace if distorted or
damaged