5
•
Operating Pressure
- Check operating pressure to see if it within 10% of units specified
operating pressure. If pressure drops over time it may indicate general wear and tear and a
service is recommended.
•
Air Leaks
- Especially in suction to pump hoses. Repair immediately if found. Check for
cuts & abrasions
•
Lance & Gun assemblies
- Check for damage and leaks
•
Filters
- Check to ensure filters are clean, filter heads/tops are not cracked, seals are not
worn and sealed air tight and mesh tube is unblocked
•
Motor Speed
- Check unit if motor speed is too low. If motor makes a humming sound,
switch off immediately. Do not use extension cords on these units – plug straight into wall
socket!
•
SAFETY
Ensure safety protective gear is used and in good state of repair. Ensure Safety
MEDIC ALERT Card is handy.
•
Prolonged by-pass
- Leaving the unit in prolonged by-pass (machine is switched on but
trigger is not depressed) can cause excess wear & tear due to water over-heating which
damages seals. Portable units have a safety mechanisms built in to prevent damage:
o
Automatic dumping of hot water when water temp rises above 63 deg C.
•
Worn By-Pass Valves
- Soft-Acting By-Pass valves should NOT store high pressure water
in hose down-stream between by-pass valve and high pressure gun.
•
Water Leaks
- Excessive hammering can cause damage. Fix leaks when they occur
•
Water Condition
- Ensure water source is clean (potable water). Not recycled water or
bore water which can damage pumps.
•
Tyre Pressure
– Trailer mounted units only
•
Mechanical Brake System (Trailers)
– Check all bolts and nuts – tighten if necessary
