DARLEY HEF User manual

OPERATING INSTRUCTIONS
HEF DOLPHIN FLOAT PUMP
Corporate Office: Pump Manufacturing: Apparatus Division:
325 Spring Lake Drive 1051 Palmer St. 920 Kurth Rd.
Itasca, Illinois 60143-2072 Chippewa Falls, WI 54729 Chippewa Falls, WI 54729
800-323-0244, fax [phone], Fax [phone], Fax [phone]
WWW.DARLEY.COM
This manual is for DARLEY FIRE PUMP:
Model: HEF Pump Serial Number: ________

Introduction
This manual provides information for the use and understanding of this manual, correct
operation, maintenance, troubleshooting of the Darley HEF Dolphin Float Pump, definition of
terms, and contacts. Please read and understand these instructions thoroughly before putting
this system into service. Doing so will ensure optimum performance and long life of your
Darley Floating Pump.
This manual is divided into eight sections, each section details an important portion of this
manual and pump.
Section 1 Definition of Symbols
Section 2 Operation
Section 3 Pump Assembly/Disassembly
Section 4 Components
Section 5 Maintenance Schedule
Section 6 Troubleshooting
Section 7 Definition of Terms and Operating Characteristics of
Pumps.
Section 8 Contacts

Prepared by: RJG Rev. A
Approved by: TED Date: 03/04/10
Revised by: TED Rev. Date: 30June2015
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Section 1
Definition of Symbols

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IMPORTANT
Throughout this manual will find Caution, Warning and Danger symbols.
Please pay close attention to these symbols as they are for your safety.
- Signifies an imminently hazardous situation that
could result in death or serious injury.
- Signifies a potentially hazardous situation that could
result in death or serious injury.
- Signifies a potentially hazardous situation that
might result in minor or moderate injury.
- Signifies a potentially hazardous situation that
might result in property damage.
Intentionally ignoring any of these identified hazards is not
recommended. W.S. Darley does not advise such actions or take
responsibility for the actions of any operator of this unit.

Prepared by: RJG Rev. A
Approved by: TED Date: 03/04/10
Revised by: TED Rev. Date: 30June2015
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Section 2
Operation

Prepared by: RJG Rev. A
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Revised by: TED Rev. Date: 30June2015
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Operating Instructions
For Darley “DOLPHIN” Floating Fire Pump
Do not use this pump for hose testing. Such testing could
result in major pump or engine damage. Such damage may cause
explosion, overheating of the engine and/or pump, and bodily harm.
PREPARATIONS FOR PUMPING
Make sure to read the engine instruction manual before usage.
Check the engine oil level before starting the engine.
Check the fuel level before starting the engine.
Do not run the pump dry or at high speed unless it is placed in water of adequate
depth.
Connect the discharge hose to the pump.
Ensure the discharge breather check valve; located near the Darley emblem on
the float; is working, clean and clear of debris.
Start the engine.
Place float pump in the water immediately after starting. This Float pump is self-
priming due to a flooded suction. The pump will prime more quickly if the engine
is run at lower speeds.
Slowly open the engine throttle once the pump is primed and discharging water.
Recommendations
Do not allow unusual elevation of the discharge hose, this may
cause the float to overturn.
When pumping salt water or dirty water, flush pump with clean water after usage.

Prepared by: RJG Rev. A
Approved by: TED Date: 03/04/10
Revised by: TED Rev. Date: 30June2015
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Section 3
Maintenance (Assembly/Disassembly)

Prepared by: RJG Rev. A
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PUMP DISASSEMBLY
Drawing DHC1204
For pump overhaul or disassembly follow the corresponding steps
Drain oil and gas from engine, ensuring there is no fuel in the tank or lines.
oThere may be small residual amounts of oil remaining in the engine (up to 8
ounces), which may read at the very end of the dipstick (see photo below).
If the oil level is up as high as the H on the dipstick, below the ADD mark,
the oil needs to be further drained prior to tipping the engine.
Remove the (3) bolts holding the support plate (6) to the float (5).
Remove the pump discharge pipe from the pump discharge.
Remove the engine and pump by tilting the engine forward and lifting the
assembly clear of the float. Only tilt the engine so the exhaust faces down.
Titling the engine in other directions may damage the engine. It
may also cause fuel to leak out causing a hazardous spill.
The suction head (11) may now be removed from pump casing (8) using the
tapped pusher holes if necessary.
Remove the impeller bolt (15). Remove the engine spark plug and insert a clean
rope into bore to prevent engine rotation and ease removal of the impeller bolt
(15) (see photo below).

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Remove impeller (16) by threading a 9/16-12 NC x 1 3/4 pusher bolt into the
tapped hole occupied by the impeller bolt. Do not force impeller, use penetrating
oil on the engine shaft if the impeller will not move.
Pump casing should be removed only if necessary to replace pump pilot bushing
(20).
Inspect and replace worn or damaged parts. If you are unsure if a part is damaged
or worn contact Darley Customer Service or Engineering for assistance. If seal
rings need to be replaced it is STRONGLY recommended to send the pump unit
back to Darley for removal and re-placement. Personal removal and replacement
of these seal rings may damage the pump casing if not done properly. If you insist
on personal removal contact Darley Engineering for assistance.
For pump re-assembly follow the corresponding steps
Use Loctite 242/243 (Blue) thread locker or equivalent on all pump related
fasteners.
If the pump casing was removed, re-install the pump pilot bushing (see photo
below). With a small punch, in a 90 degree pattern, punch the pilot bushings
edges into the pump casings bore for the bushing. (see photo below).

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Lightly oil the inside diameter of the pilot bushing, and re-attach the pump casing
to the engine (see photo below).
Ensure that the engine is laying with the exhaust facing down. FINGER TIGHTEN
fasteners between the pump casing and the engine evenly in an alternating
opposite corner pattern to prevent cocking of the pump assembly in relation to
the engine (see photo below).
Place the drive key in the engine shaft keyway.
Lightly oil the bore of the impeller.

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Slide the impeller onto the shaft, being careful not to roll the lips of the
mechanical seal backwards.
Install the impeller washer and 7/16-20 x 1.00 lg. SST HHCS with a small drop of
Loctite 242/243 (Blue) thread locker to hold the impeller in place. Ensure that the
spark plug is removed from the engine and a clean rope is in its place. This will
allow you to effectively tighten the impeller fastener without the engine shaft
rotating.
Using the rubber gasket to seal the flange (see photo below), install the suction
head on the pump casing with six 3/8-16 x 0.75 lg HHCS with a small drop of
Loctite 242/243 (Blue) thread locker on each.
Remove the rope from the spark plug bore and pull the recoil rope two or three
times to align the pump assembly and engine (see photo below).

Prepared by: RJG Rev. A
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Tighten the four fasteners that hold the pump assembly to the engine evenly in an
alternating opposite corner pattern to prevent cocking of the pump assembly in
relation to the engine (see photo below). DO NOT OVERTIGHTEN.
Pull the recoil rope two or three times again, to ensure that the pump assembly
and engine are aligned. If the assembly is binding, or turns over hard, loosen the
fasteners, and repeat the previous two steps.
Reinstall the spark plug.
Set the pump assembly into the float (see photo below). But do not fasten the
engine to the float yet.

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Install the discharge pipe to the pump casing discharge nipple using Loctite
242/243 (Blue) thread locker.
Using three flat washers, lock washers, and 5/16 x 0.75 lg HHCS, fasten the
mounting plate to the float. DO NOT OVER TIGHTEN. DO NOT USE THREAD
LOCKER.

Prepared by: RJG Rev. A
Approved by: TED Date: 03/04/10
Revised by: TED Rev. Date: 30June2015
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Prepared by: RJG Rev. A
Approved by: TED Date: 03/04/10
Revised by: TED Rev. Date: 30June2015
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Prepared by: RJG Rev. A
Approved by: TED Date: 03/04/10
Revised by: TED Rev. Date: 30June2015
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Section 4
Components

Prepared by: RJG Rev. A
Approved by: TED Date: 03/04/10
Revised by: TED Rev. Date: 30June2015
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The float for this unit is foam filled to assist in buoyancy.
The pump casing is hard anodized aluminum.
The impeller is manufactured from bronze. It is ground and dynamically
balanced for maximum performance.
The suction head is anodized aluminum.
The engine is a gasoline powered, Briggs and Stratton, vertical shaft
model.
The engine has a built in governor to limit the engine speed.
The fuel tank is plastic.
The fuel tank capacity is 2.8 quarts and should allow for an approximate
run time of 47 minutes at full load.
The throttle has an integrated on/off design, off is full slow.
The engine choke is built into the throttle.

Prepared by: RJG Rev. A
Approved by: TED Date: 03/04/10
Revised by: TED Rev. Date: 30June2015
1200627.doc
Section 5
Maintenance Schedule

Prepared by: RJG Rev. A
Approved by: TED Date: 03/04/10
Revised by: TED Rev. Date: 30June2015
1200627.doc
IMPORTANT
Check your engine instruction manual for recommended maintenance
schedule.
Darley recommends flushing the pump and minor disassembly inspections
if the pump is not performing as intended.