Dual Pumps Cobra User manual

Dual Pumps Limited
Unit 8, Hudson Road, Saxby Road Ind. Est. Melton Mowbray, Leicestershire LE13 1BS
Tel: [phone] Fax: [phone]
E-mail: [email protected] www.dualpumps.co.uk www.dualpumps.co.uk
Cobra & Delta
Quick
Start Guide
Cobra Delta
pumps
Engine Driven Pressure Washers
Pressure Washer will not prime!
Pump valves can become stuck during storage, connect mains water hose to the pump inlet to
force water through the pump, then start the engine briefly to free any sticky valves.
Note: You will need to unclip the supplied suction hose at the pump end quick release fitting
and attach your mains water hose to allow the water pressure to force the valves open,
remember to open the lance trigger allowing the water to pass through the pump.
Pressure seems low!
1) Check the pressure regulating valve knob is turned fully clock-wise.
2) Ensure all the air is expelled from the pump and pipe work.
3) Check the nozzle head at the end of the lance is turned to the high pressure position.
Pressure rises and falls intermittently!
1) Check for loose suction hose connections allowing air into the pump.
2) Check the suction quick release coupling is in good condition and the sealing o’ring is not
damaged; if in doubt replace the O-ring.
3) Check the suction filter is fully submerged under the water.
4) Check the suction hose is not kinked restricting the flow.
5) Check that suction filters are not blocked.
If connected direct to the mains water, check that no other appliance is using water from the same
supply; this will reduce the flow to the pump making it noisy and low on pressure.
Note: Prolonged use with restricted water feed will damage the pump seals and valves.
Engine will not start!
1) Check there is fuel in the tank.
2) Check the oil level in the engine is at the correct height. Engines with oil alert will not start
if the oil level is low.
3) The engine choke may be required if the engine is cold or the engine has just been fuelled for
the first time.
Fault Finding Tips 793-1280

Cobra & Delta Pressure Washer
Quick Start Guide
IMPORTANT
Before you start to use this machine please read the safety instructions
in section 3 of the Pressure Washer handbook
IMPORTANT
If the machine fails to prime refer to the
Pressure Washer Handbook
Attach the water suction
hose to the machine inlet
connection
The suction hose should
be used with a clean
water supply
Attach the high pressure
hose to the machine
outlet connection
Attach the end of the high
pressure hose to the trigger
gun connection
Ensure the fuel tank is
filled with clean fuel
Remove travel bung and
fit dipstick
Travel Bung Dipstick
Fill engine with oil to
correct level
Check the oil levels for the
pump, and gearbox
(if fitted)
Adjust the nozzle to the
required pressure position
Open the fuel tap, close the
choke and start the engine,
gradually open the choke
until the engine runs
smoothly
Slowly increase the engine
revs to approximately
HALF speed
Open the trigger gun and
the pump will slowly start
to prime the water through
Do not attach the end of the
two-piece lance assembly
until priming is completed
Once a constant flow of
water is achieved the split
lance can be reconnected
X
X
LOW
HIGH
LOW
HIGH
Increase the engine
revs to FULL speed
1
9 12
15
10
13
11
14
4
7
3 5
8
2 6
The machine
is now ready
for use.
Check Oil