Portable Fire Pump Honda

San Rafael Fire Department

Objectives

•  Identify the parts of the portable pump and pump equipment

•  Perform field maintenance on the portable pump

•  Set up and operate portable pump providing water

Information provided

•  Pump description and hardware

•  Pump Maintenance

•  Pump set up and application

•  References

Pump description

•  Honda Model WH20X •  4 stroke, air cooled, single cylinder gas

engine, 9.9 cu in •  Single stage centrifugal pump, 70 psi. max •  Maximum of 130 GPM with open butt •  Self priming 1 Minute @ 16.4 feet •  Fuel tank 2.5 hour run time

Honda Pump

Ignition switch Oil dip

Fuel Pump

Parts of the Pump

Fuel

Choke

Throttle

Ignition

Fuel Tank

HOT! Exhaust

Parts of the Pump

Pump Fuel sediment cup

Spark plug

Hot! Air Cleaner Priming Plug

Parts of the Pump Priming Plug

HOT

Pump Suction

Pump Discharge

Pump Drain

Pump Hardware

•  Brass Bag contents –  ½” Nozzle Tip –  Screwdriver –  Hose clamp with spanner –  Spark plug –  Wrenches

•  10mm •  Spark plug

–  “O” rings –  Ear plugs –  Spare Priming Plug

Also a water container for Pump priming

Additional Pump Ware

•  Foot Valve –  One way check valve for

priming

•  Rope –  For Tying off equipment –  Tying off shovel

•  Shovel –  For shallow water –  Prevents sucking debris

Pump Maintenance

•  Gasoline 86 octane or higher •  Spark plug (NGK BPR6ES or equivalent)

Gap .7-.8mm •  Carburetor sediment cup for cleaning •  Oil; capacity .6 quarts, 10W-30 grade •  Air cleaner; warm soapy water, dry, apply

oil

Field Expedient Repair •  Same power unit as PPV fans

–  Emergency field repair –  Parts or Replacement

•  Fuel sediment cup –  Drain sediment or water –  10mm plug

•  Cord breaks or spring fails –  Remove housing (10mm) and wind cord to start motor

•  Spark plug –  90% of portable pump failures are due to fouled plugs –  After troubleshooting replace the sparkplug –  Gap with sheet metal on exhaust, its close

Fuel Sediment Cup

10 mm plug

Remove plug, drain Contaminated fuel

Turn Fuel off!

Turn Fuel off!

Pull cord breaks

Remove pull cord assembly 3-10mm head bolts

Cooling fan with hub under pull assembly

NOTE: Notch for pull start

Field Pull Cord

Knotted utility rope in notch

Wind utility rope clockwise and give it a pull

Caution: Hub will be uncovered and spinning at high RPM

Caution: Hub will be uncovered and spinning at high RPM

Spark plug

Remove sparkplug wire

Sparkplug ready to be removed with sparkplug wrench

HOT

HOT

Application

•  Drafting •  Pressure multiplier •  Volume multiplier •  Fire suppression •  Water Supply

Drafting

•  Environmental consideration – Hydrocarbon leaks/spill near water supply

•  Use plastic or salvage cover to limit hazard – Mud and soft soil

•  Use wood/salvage cover/logs under pump protect pump from sinking or splattering mud over cooling fins

– Enclosed space •  CO poisoning

What is a Footvalve?

•  A 2 ½” check valve strainer for the

suction hose on our portable pumps, allows a pre-primed suction

•  Reduces the time needed to completely

prime the suction hose and provide water from the pump

The Footvalve

Spring loaded check valve inside

Fill method

CAUTION: Unsecure items may enter the water source! Ron’s Glasses

Fill method, Priming the hose

Submerge hose as deep as possible

Water Level

Lift hose, water remains in hose

Drafting

•  Attach hard suction •  Prime pump

– Foot valve method to fill hose – Fill pump case through prime plug hole

•  Tighten all suction hoses – Wrench tight – Leaks reduce drafting capability

Start Pump and increase throttle

• Fill pump through priming cap • Ignition, fuel, choke on • Pull start, throttle up • Prime in less than 1 minute

Optimum Pump Performance

P 100’, 1 1/2” Hose Pump

½”nozzle 50-60 GPM

Draft height, pump performance and hose layout are some factors that influence actual flow

70 PSI pump Pressure -50 PSI ½ “ tip -12 PSI F.L =50-60 GPM

Pump Performance

Performance in the Field Flows at

4 foot draft with 100’ of hose, ¾”

tip. Actual performance

varies

¼

Throttle

½

Throttle

Full

Throttle

1 ½ inch

30 GPM @

10 PSI N.P

65 GPM @

25 PSI N.P

85 GPM @

30 PSI/N.P

2 ½ Inch

35 GPM @

10 PSI N.P

70 GPM @

40 PSI N.P

90 GPM @

50 PSI N.P

Pressure Multiplier

•  Need Pressure? – Elevation – Hose size and length – Friction loss

•  Develop pressure by utilizing series pumping

•  One pump supplying the next will double pressure. Volume will remain the same.

Pressure Multiplier First Stage Must be primed First!

Second Stage

Discharges twice the pressure

Soft hose between pumps visually shows cavitation

Pressure / Series

130GPM @ 140psi At the pump not the nozzle!

Volume Multiplier

Pump one

Pump two

Volume Multiplier

Pump one

Pump two

Supply, double the volume

Construct the siamese! 2 double females, 1-double male

Clapper siamese reduces efficiency!

Volume / Parallel

260 GPM @ 70 psi at the pump

Fire Suppression

•  Optimum pump operations include – Correct hoseline for application – Pump as close to water level as possible – Planning pressure or volume application

Hose lay theory Hose Size

Nozzle Pressure

Tip Size

GPM Single pump

Length’

Series pump(2) Length’

Parallel pump(2) Length’

1 ½” 50 3/8” 30 1000’ 4500’ N/A

1 ½” 50 ½” 50 250’ 1250’ N/A

1 ½” 50 ¾” 120 50’ 250’ N/A

2 ½” 50 1 1/8” 260 N/A N/A 100’

2 ½” 20/relay supply

N/A 130 1650’ 4000’ N/A

2 ½” 20/relay supply

N/A 260 N/A N/A 350’

Nozzle Tips

•  Fog –  Must use pumps in

series!! –  2 ½” rated at 50 psi

•  Limited application

–  1 ½” tips operate at 100 and 75 psi

•  Pump rated at 70 •  Limited application

•  Smooth Bore –  Most useful for all

pump operations –  Benefit from 50 psi tip

pressure –  1 ½” and 2 ½” tips

Theory

•  How many GPM? •  520 GPM •  What is the Pressure

developed? •  140 psi

P

P

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P

P

P

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