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Improper installation of the U-joints will soon destroy
them along with the bearings in the pump and PTO.
Properly mounted, the second universal gives uniform motion
to the drive shaft by compensating for the rotational error
introduced by the first U-joint. An even number of universal
joints (2, 4, 6 etc.) should always be used. An odd number of
U-joints will cause unbalanced pump shaft rotation. This
problem becomes greater with increased angularity.
Other points to consider include the proper sizing of the
shaft components with a maximum horsepower load to be
expected, good alignment of hanger bearings and proper
pump coupling alignment. Improper PTO systems count
for a high percentage of truck pump failures. Always
remember to disengage the clutch before shifting the PTO
into gear. Shifting the PTO into gear without disengaging
the clutch imparts an enormous shock on the PTO, drive
shaft, pump and meter and will soon damage one or all of
them.
For proper installation of pump drives, follow the rules listed below:
1. Driver shaft and pump shaft must be parallel, plus or
minus one degree.
2. Operating angle of the ''floating'' shaft must be fifteen
degrees maximum.
3. Universal yokes must be in line and parallel.
4. Splined slip joints must be used where needed.
5. Use an even number of universal joints.
6. Always use the least practical number of shafts.
PTO selection and drive system design is extremely
important. The PTO should have an average output speed
of 500 to 800 RPM when the truck engine is operating at
the recommended speed.
The designer of the drive system must select a PTO drive shaft
capable of meeting the torque requirements of the pumping system,
Hydraulic Drive Systems
Truck pumps are also driven by hydraulic systems, consisting
of an adaptor, a motor, a pump, a cooler and connecting hoses.
The truck pump's shaft must be properly aligned with the
hydraulic motor's shaft to avoid excessive stress on the
truck pump's main and thrust absorbing bearings. See
Appendix D for outline dimensions.
The sizing of the hydraulic motor, the hydraulic pump and
the hydraulic oil cooler must be done using the operational
requirements of the truck pump, i.e., flow rate, differential
pressure, pump speed, required torque and power. These
data are on the performance charts in Appendix C.
Information on the Char-Lynn hydraulic motor is found in
Appendix H.
Operation of Your Z-Series Coro-Vane
Truck Pump
Performance curves and charts are provided in Appendix C.
The following steps should be performed for the initial
pumping operation:
1. Close the shutoff valve on the end of the delivery hose.
2. Follow the instructions of the internal valve manufacturer
for putting the valve into operation.
3. Start the pump and circulate liquid through the external
by-pass system.
4. If your system has a Corken T-166 By-Pass Valve, adjust
the valve by turning the adjusting screw counter
clockwise until the pump discharge pressure gauge
shows nearly the same pressure it did before you started
the pump. Turn the adjusting screw clockwise until the
gauge indicates about 100 to 115 psid above the tank
pressure. If a by-pass valve of another make is used,
follow the instructions provided for adjusting the valve.
5. You may increase the speed of your pump as long as it
increases the capacity of the pump and does not exceed
the excess flow valve or external by-pass valve setting.
The one exception occurs when the pump is used to
"Pump On'' or to load the truck tank. In this case, the
pump inlet conditions are poor at best so the pump
should be operated at a slower RPM.
NOTE: IF PUMP SPEED IS INCREASED, BE CERTAIN
THE METERING SYSTEM WILL HANDLE THE
INCREASED FLOW.
WHEN PROPERLY INSTALLED AND OPERATED, Z-
SERIES CORO-VANE
EXCEED AN 88 dBA NOISE LEVEL AT A DISTANCE
OF ONE METER (3.281 ft) FROM THE SURFACE OF
THE PUMP.
How to Transfer From the Truck
Tank at Full Capacity
To move volatile liquids rapidly from a truck tank requires
that a condition be maintained within the truck tank that
keeps the liquid and the vapors above the liquid in
equilibrium—to prevent violent boiling of the liquid. As
liquid is removed from the tank, some of the liquid boils
to form vapor to fill the space created as the liquid
leaves. If this action becomes too violent, the pump will
begin to make noise, and the capacity will be reduced.
6
®
TRUCK PUMPS DO NOT
®
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