Simpson ALH4240 User Manual (English)

Questions and Answers:

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Eric BakerAug 16, 2025
What to do if my Simpson ALH4240 has no or low pressure?
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  David PerezAug 16, 2025
  If your Simpson Pressure Washer has no or low pressure upon initial use, consider the following: * Ensure the spray wand is set to high pressure. * Verify the water supply provides at least 5 gpm @ 20 PSI. * Check for leaks at the high-pressure hose fitting and repair if necessary, using sealant tape if needed. * Make sure the choke is in the 'No Choke' position. * Confirm that you are using a high-pressure hose under 100 feet (30 m).
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Julie TownsendAug 19, 2025
Why won't my Simpson ALH4240 draw chemicals?
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  Karen BradshawAug 19, 2025
  If your Simpson Pressure Washer isn't drawing chemicals, check these potential causes: * Ensure the spray wand is set to low pressure. * Clean the chemical filter if it's clogged. * Make sure the end of the detergent siphon hose is fully submerged in the cleaning solution. * Dilute the chemical if it's too thick; it should have the same consistency as water. * Lengthen the water supply hose instead of using a long high-pressure hose.
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Laura ContrerasAug 22, 2025
Why is my Simpson Pressure Washer having low pressure?
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  Sheri MaciasAug 22, 2025
  To troubleshoot low pressure on your Simpson Pressure Washer, ensure your water supply is at least 5 gpm @ 20 PSI. Repair any leaks at the high-pressure hose fitting, applying sealant tape if needed. Clear any obstructions from the nozzle, and clean the water filter screen. Remove air from the hose by disconnecting the water source, turning it on until a steady stream appears, then reconnecting and squeezing the trigger. Also, check that the choke is in the 'No Choke' position and use a high-pressure hose under 100 feet.
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Kelly WilliamsAug 26, 2025
What to do if my Simpson ALH4240 Pressure Washer will not draw chemicals?
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  Sandra BrownAug 26, 2025
  If your Simpson Pressure Washer isn't drawing chemicals, ensure the spray wand is set to low pressure. Check and clean the chemical filter if it's clogged. Verify the detergent siphon hose is fully submerged in the cleaning solution. If the chemical is too thick, dilute it to the consistency of water.
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Melissa SheppardAug 28, 2025
Why is my Simpson Pressure Washer leaking water at the gun?
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  James HernandezAug 28, 2025
  If your Simpson Pressure Washer has water leaking at the gun/spray wand connection, check for a worn or torn o-ring and replace it if necessary. Also, ensure that the hose connection is tight.
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Robert WeaverAug 31, 2025
What to do if water is leaking at the gun/spray wand connection of my Simpson ALH4240 Pressure Washer?
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  lisaserranoAug 31, 2025
  If water is leaking at the gun/spray wand connection of your Simpson Pressure Washer: * Check for worn or torn o-rings and replace them if necessary. * Ensure the hose connection is tight; tighten if loose.
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Dalton LyonsSep 3, 2025
Why is my Simpson ALH4240 pump pulsating?
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  Christopher PowellSep 3, 2025
  If your Simpson Pressure Washer pump is pulsating, the nozzle might be obstructed.
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vhuntSep 6, 2025
What to do if oil is leaking at the pump of my Simpson Pressure Washer?
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  Jessica KellerSep 6, 2025
  If you notice oil leaking at the pump of your Simpson Pressure Washer, here are some things to investigate: * Check if the oil seals are worn. * Tighten the drain plug if it's loose. * Inspect and replace the drain plug o-ring if worn. * Inspect and replace the fill plug o-ring if worn. * Verify the oil level is correct. * Ensure the correct type of oil is being used; drain and refill if necessary. * Clean the vent plug to remove any blockage; replace if the problem persists.
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Amy HarveySep 9, 2025
Why is my Simpson Pressure Washer leaking oil at the pump?
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  Amanda ShawSep 9, 2025
  If you notice oil leaking at the pump of your Simpson Pressure Washer, tighten the loose drain plug. Inspect and replace the worn drain plug o-ring, worn fill plug o-ring. Ensure the pump isn't overfilled and that you're using the correct type of oil. Clean the vent plug by blowing air through it; replace if necessary.