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97-6068, 97-6131 • REV. 3/06
OPERATOR’S MANUAL
PRESSURE WASHER
18
PREVENTATIVE MAINTENANCE
1. Use clean fuel — kerosene, No. 1 home heating
fuel or diesel fuel. Clean or replace fuel filter every
100 hours of operation. Avoid water contaminated
fuel as it will seize up the fuel pump. De-soot coils
monthly. Use an additive if diesel is being used.
2. Check to see that the attached pressure washer
water pump is properly lubricated.
3. Follow winterizing instructions to prevent freeze
damage to pump and coils.
4. Always neutralize and flush detergent from sys-
tem after use.
5. If water is known to be high in mineral content, use
a water softener on your water system, or de-scale
as needed.
6. Do not allow acidic, caustic or abrasive fluids to be
pumped through the system.
7. Always use high grade quality cleaning products.
8. Never run attached pressure washer pump dry for
extended periods of time.
9. If machine is operated with smoky or eye burning
exhaust, coils will soot up, preventing water from
reaching maximum operating temperature. (See
section on Maintenance and Service).
10. Never allow water to be sprayed on or near the
motor or burner assembly or any electrical com-
ponent.
11. Delime coils as per instructions.
It is advisable, periodically, to visually inspect the burner.
Check air inlet to make sure it is not clogged or blocked.
Wipe off any oil spills and keep equipment clean and
dry.
The areas around the pressure washer should be kept
clean and free of combustible materials, gasoline and
other flammable vapors and liquids.
The flow of ventilating air to the burner must not be
blocked or obstructed in any manner.
MAINTENANCE AND SERVICE
Unloader Valves:
Unloader valves trap pressure in the line when a shut-
off spray gun is closed. Machines with unloader valves
are preset and tested at the factory before shipping.
Occasional adjustment of the unloader may be neces-
sary to maintain correct pressure.
Winterizing Procedure:
Damage due to freezing is not covered by warranty.
Adhere to the following cold weather procedures when-
ever the washer must be stored or operated outdoors
under freezing conditions.
During winter months, when temperatures drop below
32°F, protecting your machine against freezing is nec-
essary. Store the machine in a heated room. If this is
not possible then mix a 50/50 solution of anti-freeze/
water or windshield washer fluid with water in a 5 gal-
lon bucket. Place a short section of garden hose into
the bucket and connect it to the machine. Elevate the
bucket and turn the pump on to siphon the anti-freeze
through the machine. If compressed air is available, an
air fitting can be screwed into the inlet connector and
by injecting compressed air, all water will be blown out
of the system.
If you have an optional float tank, pour the antifreeze
into this tank and run machine until antifreeze exits dis-
charge nipple.
High Limit Hot Water Thermostat:
For safety, each machine is equipped with a high limit
control switch. In the event the temperature of the wa-
ter should exceed its operating temperature, the high
limit control will turn the burner off until the water cools.
Pumps:
Use only SAE 30 weight non-detergent oil. Change oil
after first 50 hours of use. Thereafter, change oil every
three months or at 500 hour intervals. Oil level should
be checked by using the dipstick found on the top of
the pump or by the red dot visible through the oil gauge
window. Oil should be maintained at that level.
Cleaning of Coils:
In alkaline water areas, lime deposits can accumulate
rapidly inside the coil pipes. This growth is increased
by the extreme heat build up in the coil. The best pre-
vention for liming conditions is to use high quality clean-
ing detergents. In areas where alkaline water is an ex-
treme problem, periodic use of deliming powder will
remove lime and other deposits before coil becomes
plugged.
Deliming Coils With A Pressure Washer:
Periodic flushing of coils is recommended.
Step 1 Fill a 5 gallon bucket with 4 gallons of water,
then add 1 lb. of deliming powder. Mix thor-
oughly.
Step 2 Remove the high pressure nozzle from the
pressure wand and put the wand into the
bucket. Secure the trigger on the spray gun
into the open position.
Step 3 Attach a short section (3-5 ft.) of garden hose
to the attached pressure washer to siphon so-
lution from the elevated bucket. Start up pres-
sure washer, allowing solution to be pumped