6 - Maintenance
1. 13
Check for EVC Pressure Regulator
€
DANGER: Make sure tank has been thoroughly emptied and decontaminated before commencing any work
on the fluid system.
Periodically check the EVC pressure regulation valve for proper sealing. If it becomes difficult to build up sufficient
pressure or if pressure fluctuations occur, it may be necessary to replace piston and cylinder. Do this by running the
sprayer with clean water and open all distribution valves using the following steps;
•
Wind pressure controller up to maximum.
•
Cautiously remove the u-clip and pull out the hose for the
return line port (A).
•
When the housing is drained, there should be no liquid flow
through the return line port (A).
•
Run pump with Distribution valves open
•
Measure the leakage rate out of port (A), If the rate is greater
than 5 litres per minute the valve cylinder (C), piston (F) and
o-ring (D) must be changed.
•
Remove the screws and lift the motor housing off the valve
housing.
•
Undo the nut (E) and replace the valve cylinder (C), piston (F)
and o-ring (D).
•
Reassemble in reverse order.
Cone Check for Distribution valves
€
DANGER: Make sure tank has been thoroughly emptied and decontaminated before commencing any work
on the fluid system.
Periodically check the distribution valves for proper sealing. Do this by running the sprayer with clean water and
open all distribution valves. Cautiously remove the clip (A) and pull out the hose (B) for the return line. When the
housing is drained, there should be no liquid flow through the return line. If there is any leakage, the valve seal (E)
must be changed on all motor assemblies. Remove the clip (C) and lift the motor housing off the valve housing.
Then unscrew the screw (D) and replace the valve seal (E). Reassemble in reverse order. Service kits are available
through your local HARDI dealer.
PRESSURE REGULATOR
A
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...
