Davies Craig EWP80, EWP130, EWP115, EWP150 Installation Instructions Manual
P/No:18924 – EWP Kit Customer Instructions. Page 1 of 12
77 Taras Avenue
P.O. Box 363
Altona North
Vic 3025 Australia
Phone: +61(0)3 9369 1234
Fax: +61(0)3 9369 3456
ELECTRIC WATER PUMP (EWP®) KIT
INSTALLATION INSTRUCTIONS
EWP80, EWP115, EWP130, & EWP150 Kits
PLEASE READ ALL THESE INSTRUCTIONS THOROUGHLY BEFORE YOU START WORK.
DON’T RUSH - ENSURE YOU HAVE FULL UNDERSTANDING OF THE WORK AHEAD BEFORE YOU
COMMENCE. ENSURE YOU HAVE ALL TOOLS AND COMPONENTS REQUIRED.
Congratulations on your purchase of the Davies, Craig EWP® Electric Water Pump Kit
which is designed to replace or complement the existing belt driven mechanical water
pump. In addition with a Davies, Craig Digital Controller your thermostat can be
replaced. The major benefits of an Electric Water Pump (EWP®) are, removal of the
parasitic power losses running a mechanical water pump at any speed, reduction of
engine warm-up time and elimination of heat soak by running the EWP® after a hot
engine shut down by operating the EWP® with the EWP/Fan Digital Controller, or one
of the Davies, Craig Thermatic® Switches. Your new EWP® has the advantage of
providing the best coolant flow rate independent of engine speed.
TABLE OF CONTENTS
EWP KIT CONTENTS .................................................................................................................................................... 2
SECTION 1: INSTALLING YOUR EWP
®
................................................................................................................. 3
SECTION 2: OPTIONS FOR PUMP CONTROL ...................................................................................................... 4
SECTION 3: DISABLE EXISTING MECHANICAL WATER PUMP .................................................................... 8
SECTION 4: BLEEDING THE EWP
®
........................................................................................................................ 9
SECTION 5: OPERATING YOUR EWP
®
ELECTRIC WATER PUMP ............................................................... 10
CAUTIONS ..................................................................................................................................................................... 11
Page 2 of 12
EWP KIT CONTENTS
EWP130 (12V/24V)
EWP Components
Hardware Bag Components
Part #
Description
Qty.
Part #
Description
Qty.
8180 or
8181
EWP Pump Short (12V)
EWP Pump Short (24V)
1
N/A
Scotch Lock
1
N/A
Ring Terminal
1
8515
Wiring Harness
1 N/A
Self-Tapping Screw
1
18301
L Adaptor 35mm (Alloy)
1 N/A
Adaptor M5 Bolt
12
18302
Straight Adaptor 35mm (Alloy)
1 N/A
Relay
1
8509
O-Ring
2 18510
EWP Rubber Sleeve 3mm
2 18512
Hose Clamps
2
8909 /
8910
Hardware Bag
1
EWP150 (12V) - EWP115 Alloy (12V) - EWP115 Nylon
EWP Components
Hardware Bag Components
Part #
Description
Qty.
Part #
Description
Qty.
8160 or
8140 or
8125
EWP150 Pump Short
EWP115 Alloy Pump Short,
EWP115 Nylon Pump Short
1
N/A
Scotch Lock
1 N/A
Ring Terminal
1
N/A
Self-Tapping Screw
1
8515
Wiring Harness
1 N/A
Relay
1
18510
EWP Rubber Sleeve 3mm
2
18512
Hose Clamps
2
8526
EWP Hardware Bag
1
EWP80 Nylon (12V)
EWP Components
Hardware Bag Components
Part #
Description
Qty.
Part #
Description
Qty.
8105
EWP Pump Short
1 N/A
Scotch Lock
1
8515
Wiring Harness
1 N/A
Ring Terminal
1
8309
Elbow Adaptor 35mm (Nylon)
1 N/A
Self-Tapping Screw
1
8307
Straight Adaptor 35mm(Nylon)
1 N/A
Adaptor M5 Bolt
6
8509
O-Ring
2 N/A
Adaptor M5 Nut
6
18510
EWP Rubber Sleeve 3mm
2 N/A
M5 Cap Screw Long
6
18512
Hose Clamps
2 N/A
Relay
1
8908
EWP Hardware Bag
1
Optional Accessories
Part #
Description
Suitable for
No.
1025
Flanged Adaptor
All EWPs
1
1024
90 Degree Adaptor
EWP115 (Alloy
Only), EWP150
2
8700
EWP Mounting
Bracket
EWP115
EWP115
EWP130
3
8000
Digital Controller
All EWPs
4
1.
3.
2.
4.
Page 3 of 12
SECTION 1: INSTALLING YOUR EWP®
1. Your EWP® Electric Water Pump is best fitted in the lower radiator hose which
connects the radiator to the existing mechanical water pump housing. In
conventional vehicle operating conditions, the hose will carry the weight of your
EWP® and insulate the EWP® from engine vibration. Check the area for available
space. Further radiator hose or adaptors may be required. Position the EWP® in
the lower hose so the inlet, in the centre of the pump is connected to the radiator
side and the outlet is connected to the engine’s mechanical water pump housing
or your EWP® Header Adaptor (not supplied). The EWP® should be positioned as
low as possible to maximise the gravity feed from the radiator and to avoid air
entering and remaining in the pump.
Alternatively, the EWP
®
may be fitted in the upper radiator hose. In this case,
coolant level is critical and bleeding of all air from the cooling system essential.
Follow instructions above for correct EWP
®
fitment ensuring the pump outlet is
connected to the hose going into the top of the radiator. The pump can be
installed in any orientation but to assist air bleeding try to mount the outlet
pointing upwards. (See Section 8 for bleeding instructions). Ensure your cooling
system is kept full of coolant.
2. If you have either an EWP130 or EWP80, assemble the provided EWP Straight and
L Adaptors to suit the configuration and space available. Ensure that the Straight
and L Adaptors have the O-Ring fit securely between them and the flange faces on
the EWP body. Six of the shorter Adaptor M5 Bolts (Part # 8507) should be used
to attach the Adaptor to the EWP outlet. The remainder M5 bolts (Part # 8507 for
EWP130) or (Part # 8514 for EWP80) can be used to attach the Adaptor to the
EWP Inlet.
If necessary, add the rubber sleeves to the inlet and outlet of the EWP® to suit
your particular hose diameter. If you require thicker sleeves, contact Davies, Craig
for supply free of charge.
3. Cut out the not required section of the radiator hose. Connect the pump inlet and
outlets to the appropriate hose ensuring hose clamps are very firmly tightened.
Page 4 of 12
SECTION 2: OPTIONS FOR PUMP CONTROL
1. With EWP® Fan Digital Controller, Part #8000 or Part #8020:
We highly recommend the use of the EWP® & Fan Digital Controller for maximum
cooling efficiency. The EWP® & Fan Controller will vary the EWP® speed in response
to the coolant temperature. You set the temperature desired for maximum power
or fuel efficiency. The Digital Controller has an in built function that allows the
EWP® to run on after hot engine shutdown to eliminate heat soak. We further
recommend the removal of the engine’s thermostat and disabling of mechanical
water pump. The pump belt may need to be modified or the pump pulley left as an
idler. The vehicle’s heater may take a little longer to warm up and to improve the
heating, we recommend the fitment of an Electric Booster Pump (EBP) to the
heater line if necessary.
2. With Davies, Craig Thermatic® Switches, Part #0401 or Part #0444:
Combine the EWP® with either of the approved Davies, Craig thermal switches
listed here when the EWP® is used as a booster pump to assist the existing
mechanical water pump cool an overheating engine.
Connect the thermal switch directly to the battery and your EWP® will run on to
eliminate heat soak. You may leave the thermostat in place, but ensure the EWP®
operates only when the thermostat is fully open.
3. Continuous running:
Wire the EWP® direct to the ignition for maximum cooling (race vehicles, very hot
climates). This option requires the removal of the engine thermostat and the
mechanical pump impeller or pump belt. This option may also be used for road cars
with the thermostat in place with a small hole (suggest 5mm), allowing a small
amount of flow to circulate even when the thermostat is closed.
WARNING: When using the Electric Water Pump (EWP®) on vehicles using LPG, it
is recommended that an EBP be fitted to circulate coolant through the LPG
converter.
Part #8000 – LCD Controller
Part #0444 – Thermatic Switch
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