HOTSY DB-3835 (01) PDF Document

The main components of the HOTSY DB-3835 and their functions are as follows:

Pump: Develops high pressure.

Starter Grip: Used for starting the engine manually.

Spray Gun: Controls the application of water and detergent onto the cleaning surface with a trigger device. It includes a safety latch.

Detergent Injector: Allows you to siphon and mix detergents.

Wand: Must be connected to the spray gun.

High Pressure Hose: Connects one end to the water pump discharge nipple and the other end to the spray gun.

Pump Protector: Cycles fresh cool water through the pump when recirculating water reaches 140°F. If the trigger on the spray gun is released for more than 1-2 minutes, warm water will discharge from the pump protector onto the floor to prevent internal pump damage.

Pressure Nozzle: Attaches to the wand to create a specific spray pattern.

Inlet Screen: Filters water coming from the garden hose.

Unloader: A component for regulating pressure (DB-3835 and DB-3540 models only).

Follow these steps to assemble your HOTSY DB-3835:

Step 1: Attach the handle to the frame of the pressure washer. It may be necessary to move the handle supports from side to side to align the handle so it slides over the frame supports.

Step 2: Insert the carriage bolt through the holes from the outside of the unit and attach a nut from the inside of the machine. Tighten the nuts.

Step 3: Attach the spray gun/hose storage handle and bracket to the handle. Tighten the nuts.

Step 4: Attach the high-pressure hose to the spray gun using Teflon tape on the hose threads.

Step 5: Attach the nozzle extension to the spray gun/wand. Tighten both by hand.

Step 6: Pull the spring-loaded collar of the wand coupler back to insert your choice of pressure nozzle.

Step 7: Release the coupler collar and push the nozzle until the collar clicks. Pull the nozzle to make sure it is seated properly.

Step 8: Connect the high-pressure hose to the pump discharge nipple. Push the coupler collar forward until secure.

Step 9: Connect a garden hose (7.5m) to the cold water source.

Step 10: Check the inlet filters, remove any debris, then connect the garden hose to the pump water inlet. Do not run the pump without water, as pump damage will result.

Step 1: Check the engine oil level. The oil level should be level with the bottom of the oil filler neck. Ensure the machine is level when checking. (The oil should be changed after the first 5 hours of use, then every 50 hours).

Step 2: Check the pump oil level using the dipstick or by observing the oil level in the oil window (if equipped). Use 30 wt. (non-detergent) oil.

Step 3: Fill the gas tank with unleaded gasoline. Do not use leaded gasoline.

Step 4: Squeeze the trigger on the spray gun to eliminate trapped air, then wait for a steady flow of water to emerge from the spray nozzle.

Step 5: Rotate the fuel shut-off valve to the “On” position. Slide the fuel valve lever to the “ON” position. When the engine is not in use, leave the fuel valve in the “OFF” position.

Step 6: Move the choke lever to the “Choke” position. For a warm engine, leave the choke lever in the run position. To restart a warm engine, leave the choke lever in the “Open” position.

Step 7: Turn the engine switch to the “On” position. For Briggs engines, move the throttle lever to the “Fast” position (shown as a rabbit).

Step 8: Pull the starter grip. If the engine fails to start after 2 pulls, squeeze the trigger gun to release pressure and repeat the step. Return the starter gently. After the engine warms up enough to run smoothly, move the choke to the run position and the throttle to the fast position. Small engines may kick back, so do not hold the pull starter grip tightly in hand.

The four color-coded quick connect nozzles for your HOTSY DB-3835 provide a wide array of spray widths from 15° to 40°. Always engage the safety latch on the spray gun trigger before replacing nozzles.

White 40° or Green 25° Nozzle: Use for a more gentle rinse.

Yellow 15° Nozzle: Use to scour a surface.

Black Nozzle: Use to apply detergent.

Step 1: Connect the detergent injector to the discharge nipple on the machine. Then connect the high-pressure hose to the injector with the quick coupler.

Step 2: Use a detergent designed specifically for pressure washers. Prepare the detergent solution as required by the manufacturer and place the filter end of the detergent suction tube into the detergent container.

Step 3: With the safety latch on the spray gun engaged, secure the black detergent nozzle into the quick coupler. Detergent cannot be applied using the yellow, green, or white nozzles.

Step 4: With the engine running, pull the trigger to operate the machine. Liquid detergent is drawn into the machine and mixed with water. Apply detergent to the work area from the bottom up. Do not allow detergent to dry on the surface.

Important: You must flush the detergent injection system after each use by placing the suction tube into a bucket of clean water, then run the pressure washer in low pressure for 1-2 minutes.

Follow these recommendations for the best cleaning results with your HOTSY DB-3835:

• Before cleaning any surface, test the spray pattern and distance on an inconspicuous area for maximum cleaning results.

• If painted surfaces are peeling or chipping, use extreme caution as the pressure washer may remove the loose paint.

• Keep the spray nozzle a safe distance from the surface you plan to clean. High-pressure wash a small area, then check the surface for damage. If no damage is found, continue pressure washing.

• Pre-rinse the cleaning surface with fresh water. Apply detergent to the surface at low pressure, working in sections of approximately 6 feet square from bottom to top. Allow the detergent to remain on the surface for 1-3 minutes but do not let it dry. Rinse at high pressure from top to bottom in an even sweeping motion, keeping the spray nozzle approximately 1 foot from the cleaning surface.

Chemicals to Never Use:

• Bleach, chlorine products, and other corrosive chemicals

• Liquids containing solvents (e.g., paint thinner, gasoline, oils)

• Tri-sodium phosphate products

• Ammonia products

• Acid-based products

These chemicals will harm the machine and damage the surface being cleaned.

Step 1: If you used detergent, remove the detergent suction tube from the container and insert it into one gallon of fresh water. Pull the trigger on the spray gun and siphon water for one minute to flush the system.

Step 2: Turn off the engine.

Step 3: Turn off the water supply.

Step 4: Press the trigger to release any remaining water pressure.

Step 5: Disconnect the garden hose from the water inlet on the machine.

Step 6: Disconnect the high-pressure hose from the pump discharge nipple.

Step 7: Engage the spray gun safety lock.

Always store your pressure washer in a location where the temperature will not fall below 32°F (0°C). The pump in this machine is susceptible to permanent damage if frozen. Freeze damage is not covered by warranty.

1. Stop the pressure washer and squeeze the spray gun trigger to release pressure.

2. Detach the water supply hose and high-pressure hose.

3. Turn on the machine for a few seconds until the remaining water exits. Turn the engine off immediately.

4. Drain the gas from the engine.

5. Do not allow the high-pressure hose to become kinked.

6. Store the machine and accessories in a room which does not reach freezing temperatures.

For storage of more than one month:

1. Replenish engine oil to the upper level.

2. Drain gasoline from the fuel tank, fuel line, fuel valve, and carburetor.

3. Pour about one teaspoon of engine oil through the spark plug hole, pull the starter grip several times, and replace the plug. Then pull the starter grip slowly until you feel increased pressure, which indicates the piston is on its compression stroke. Leave it in that position to prevent rusting of the cylinder.

4. Cover the pressure washer and store it in a clean, dry place that is well-ventilated and away from open flames or sparks.

Low operating pressure on your HOTSY DB-3835 can be caused by several issues:

• Insufficient water supply: Use a larger garden hose, clean the inlet water screen, and ensure the faucet is fully open.

• Clogged inlet hose strainer: Check the plumbing system for leaks. Re-tape any leaks with Teflon tape.

• Faulty or improperly adjusted unloader valve: Adjust the unloader for proper pressure. Install a repair kit if needed. Contact a local dealer for assistance.

• Worn packing in pump: Contact a local dealer.

• Machine stored in freezing temperatures: Thaw out the machine completely, including the hose, spray gun, and wand.

If your HOTSY DB-3835 is experiencing fluctuating pressure, check the following:

• Slow engine RPM: Contact a local dealer.

• Worn or dirty pump valves: Contact a local dealer.

• Nozzle is obstructed: Blow out or remove debris with a fine needle.

• Pump sucking air, inlet hose leaking: Check all pump lines and connections for tightness.

If pressure becomes low after a period of normal operation, it could be due to:

• Nozzle worn: Replace the nozzle.

• Unloader valve worn: Replace the unloader valve.

If the engine on your HOTSY DB-3835 will not start or stops during operation, consider these possible causes:

• Low oil shutdown: The engine may have shut off due to low oil. Fill the engine with oil.

• Out of gas: Fill the fuel tank.

• Water in gasoline: Drain the gas tank and fill it with clean fuel.

An overloaded engine can be caused by:

• Nozzle partially blocked: Clean the nozzle.

• Excessive pressure from high engine RPM: Adjust the engine throttle to a lower RPM.

A small amount of leaking is normal. However, if excessive leaking occurs, contact a local dealer.

Water in the pump oil can be caused by:

• Water sprayed at machine: Change the oil and direct the spray away from the machine in the future.

• High humidity in air: Check and change the oil twice as often in humid conditions.

• Piston packing worn or Oil seal worn: Contact a local dealer for service.

If the engine stops after 15 minutes of operation, check the following:

• Not enough gas or engine oil: Fill the tank with gas and check the oil level.

• Vapor lock developed by heat of day: Keep the gas tank full to avoid vapor locking.

• Obstruction in fuel filter: Clean or replace the fuel filter.

An engine that lacks power or falters could be due to:

• Dirty air filter: Replace the air filter.

• Choke is opened too soon: If the engine falters, move the choke to the halfway position until the engine runs smoothly.

If water is dripping from under the pump, it could be due to:

• Piston packing worn

• O-Ring plunger retainer worn

• Cracked piston

For these issues, please contact your local dealer.

If oil is dripping from your pressure washer, it is likely that the oil seal is worn or damaged. Please contact your local dealer for service.

The pump protector is a thermal safety feature. Leaking can be caused by:

• Spray gun closed with machine running 5 minutes or longer: Open the spray gun or turn off the machine. Do not let the machine run for more than 1-2 minutes without pressing the trigger.

• Excess water supply pressure: Place a pressure regulator at the end of a 50′ garden hose.

If your HOTSY DB-3835 is not siphoning detergent, check these common issues:

• A high-pressure nozzle is attached: You must use the black low-pressure detergent nozzle to apply soap.

• Detergent suction tube not properly connected to machine: Check the connection.

• Detergent is too thick: Dilute the detergent. For best results, use a manufacturer’s recommended detergent.

• Detergent filter valve is at the lowest setting: Set the detergent filter valve to a higher setting.

• Filter on detergent suction tube is clogged: Run warm water through the filter to remove debris.

• Damaged or clogged detergent suction tube: Remove the obstruction or replace the detergent suction tube.

• Discharge nozzle is obstructed: Blow out or remove debris with a fine needle.

Garden Hose Connection Leaks:

• Loose fittings: Tighten the fittings.

• Missing/worn rubber washer: Insert a new washer.

Spray Wand Leaks:

• Spray wand not properly attached: Slide the spray wand into the gun. Turn the wand collar clockwise onto the spray gun threads until tight.

• Broken o-ring: Call your distributor and order a new o-ring.

A noisy pump usually indicates it is sucking air. Check that all hoses and fittings are airtight. Turn off the machine and purge the pump by squeezing the trigger gun until a steady flow of water emerges through the nozzle.

Regular preventative maintenance will add many hours to the life of your HOTSY DB-3835. Perform maintenance more often under severe conditions.