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15- ENG

A00732

Water leaking
at pump

Water leaking at
gun/spray wand
connection

No or low
pressure 
(after period of
normal use)

PROBLEM

CAUSE

CORRECTION

Spray wand not in low pressure.

See How to Use Spray Wand
paragraph in the Operation
Section.

Chemical screen not in cleaning
solution.

Clean filter.

Chemical too thick.

Dilute chemical. Chemical should
be the same consistency as water.

Pressure hose is too long

Lengthen water supply hose
instead of high pressure hose.

Chemical build up in chemical
injector.

Have parts cleaned or replaced
by AWSC.

Worn seal or packing

Have replaced by AWSC.

Worn or obstructed valves.

Have replaced by AWSC.

Worn unloader piston.

Have replaced by AWSC.

Worn E-Z start valve.

Check and replace.

Loose hose connection.

Loose connections.

Tighten.

Piston packings worn.

Have replaced by AWSC.

Worn or broken o-rings.

Have replaced by AWSC.

Pump head or tubes damaged
from freezing.

Have replaced by AWSC.

Will not draw
chemicals

Make sure end of chemical hose
is fully submerged into cleaning
solution.

Chemical filter clogged.

Worn or broken o-ring.

Tighten.

Have replaced by AWSC.

Oil leaking at
pump

Oil seals worn.

Have replaced by AWSC

Loose drain plug.

Worn drain plug o-ring 

Worn fill plug o-ring.

Pump overfilled.

Incorrect oil used.

Vent plug is clogged.

Tighten.

Check and replace.

Check and replace.

Check for correct amount.

Drain and fill with correct amount
and type of oil.

Clean vent plug; blow air through it
to remove any blockage. If prob-
lem persists, replace plug.

Nozzle obstructed.

See Nozzle Cleaning paragraph in
the Maintenance section for the
correct procedure.

Pump Pulsates

Summary of Contents for ZR3700

Page 1: ...ructions 2 5 Carton Contents 6 Assembly Instructions 6 Operating Instructions 7 11 Maintenance 11 12 Storage 13 Trouble Shooting Guide 14 15 Warranty 16 Espa ol 17 32 Record All Information and attach...

Page 2: ...ush grass or other similar items then an approved spark arrester must be installed and is legally required in the state of California It is a violation of California statutes section 130050 and or sec...

Page 3: ...mals Some cleaning fluids contain substances which could cause injury to skin eyes or lungs Use only cleaning fluids specifically recom mended for high pressure washers Follow manufacturers recommenda...

Page 4: ...clothing to protect eyes and skin from contact with sprayed materials Use of acids toxic or corrosive chemicals poisons insecticides or any kind of flam mable solvent with this product could re sult...

Page 5: ...ion of your pressure washer could lead to serious injury or death to you or others Do not use chlorine bleach or any other corrosive compound Become familiar with the operation and con trols of the pr...

Page 6: ...es on panel 3 Place handle assembly onto frame depress the snap buttons and slide the handle assembly onto the frame until snap buttons snap into place CARTON CONTENTS Engine Frame and Wheel Assembly...

Page 7: ...mpare the illustrations with your unit to familiarize yourself with the location of various controls and adjustments Save this manual for future reference Engine High Pressure Hose Spray Gun Quick Con...

Page 8: ...rove cleaning effectiveness Water Supply All pressure washers must have a source of water The minimum requirements for a water supply are 20 PSI and 5 gallons per minute 3 Adjust the pres sure regulat...

Page 9: ...NOT use hot water use cold water only NEVER turn water supply off while pressure washer engine is running or damage to pump will result DO NOT stop spraying water for more than two minutes at a time...

Page 10: ...anual for correct procedure 3 Verify the filter screen is in water inlet of pump NOTE Cone side faces out HOW TO APPLY CHEMICALS AND CLEANING SOLVENTS Applying chemicals or cleaning solvents is a low...

Page 11: ...of clean water and draw clean water through chemical injection system to rinse system thoroughly NOTE Failure to do so could cause damage to the pump 2 Turn engine off See Engine Owner s Manual NOTE N...

Page 12: ...il 1 Remove dipstick oil plug from pump and wipe clean 2 Insert dipstick oil plug fully into pump then remove it 3 Oil level is correct when oil covers the lower 1 2 inch of end of dipstick oil plug H...

Page 13: ...p protector winterizer or RV antifreeze is to provide proper lubrication to the internal seals of the pump regardless of temperature or environment 1 Obtain a funnel six ounces of RV antifreeze and 16...

Page 14: ...GPM 20 PSI Leak at high pressure hose fitting Repair leak Apply sealant tape if necessary Nozzle obstructed See Nozzle Cleaning instructions in the Maintenance section Water filter screen clogged Remo...

Page 15: ...e Check and replace Loose hose connection Loose connections Tighten Piston packings worn Have replaced by AWSC Worn or broken o rings Have replaced by AWSC Pump head or tubes damaged from freezing Hav...

Page 16: ...purchaser does not receive satisfactory results from the Authorized Warranty Service Center the purchaser should contact DeVilbiss Air Power Company THIS WARRANTY DOES NOT COVER Merchandise sold as r...

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