Dual Pumps Cobra, Delta Quick Start Manual

Dual Pumps Limited

Unit 8, Hudson Road, Saxby Road Ind. Est. Melton Mowbray, Leicestershire LE13 1BS

Tel: [phone] Fax: [phone]

E-mail: [e-mail] 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