7 - Fault Finding
1. 1
Operational Problems
Introduction
In most cases where faults are experienced the most commonly accepted diagnostic approach is to rule out
possible causes systematically by a process of elimination. As a rule this process can begin by investigating the
following factors which have previously been found responsible:
•
Minor leaks on the suction side of the pump will reduce the pump capacity or stop the suction completely.
•
Pressure filters becoming blocked will result in rising pressure at the pressure gauge but falling pressure at
the nozzles.
•
Foreign material which has found it’s way to the pump valves will reduce pump efficiency.
•
Poorly re-assembled pumps, will allow the pump to suck air resulting in reduced or no fluid capacity
(investigate this if the pump was recently overhauled / serviced).
•
Contamination of the hydraulic system will result in rapid wear to hydraulic components.
It is good practice to start by checking these basics:
•
Filling, pressure and nozzle filters are clean.
•
Check hoses for leaks and cracks, paying particular attention to suction hoses.
•
Check gaskets and O-ring seals are present and in good condition.
•
Check that the pressure gauge is in good working order (accurate calibration and chemical dosage depends
on it).
•
Check the operating unit functions properly (always use clean water for testing)
•
Flow meter is functioning correctly (further information is given later in this section).
Prevention
Naturally prevention is the best policy. Regular maintenance protects your investment, maximises sprayer
efficiency, minimises expensive down time and risk of personal injury.
To achieve the best possible service from your HARDI sprayer always make sure that:
•
Hydraulic system components are maintained and kept clean (keep hose couplings up out of the dirt and
covered when not in use to prevent moisture contamination).
•
Proper cleaning and de-contamination is carried out after each spray job and before changing chemicals or
crops. Never put off cleaning until later (crop protection chemicals are much harder to remove once they’ve
dried out).
•
Regular and thorough maintenance is carried out on time (see maintenance section of this manual for
schedule).
Summary of Contents for Mercury Covamax series
Page 1: ...MERCURY COVAMAX Operator Instruction Manual 67002404 100 HAU 08 2009 www hardi com au...
Page 10: ...Table of Contents TOC 8...
Page 18: ...2 Safety 2 6...
Page 88: ...6 Maintenance 1 18 Maintenance Activity Record Date Service Performed...
Page 92: ...7 Fault Finding 1 4...
Page 100: ...8 Technical Specifications 8 8...
