Troybilt
Gas Pressure Washer

Model #01904 Troybilt pressure washer

Here are the diagrams and repair parts for Troybilt 01904 pressure washer, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Owner’s manual

    Showing 10 of 47 parts

    Pressure Washer Pump Valve Water Seal Kit#D

    Pump Diagram

    In Stock
    $135.79
    Pressure Washer Pump Mounting Hardware#6

    Unit Diagram

    Pressure washer pump mounting hardware

    Part #192131GS
    This item is not returnable
    In Stock
    $10.19
    Check Valve Assembly#34

    Pump Diagram

    Check valve assembly

    Part #190643GS
    In Stock
    $23.59
    Pressure Washer Chemical Injection Kit#38

    Pump Diagram

    In Stock
    $106.59
    Pressure Washer Check Valve Kit#A

    Pump Diagram

    In Stock
    $116.79
    Washer#24

    Pump Diagram

    Washer

    Part #190640GS
    This item is not returnable
    In Stock
    $5.50
    Pressure Washer Screw#67

    Pump Diagram

    Pressure washer screw

    Part #190651GS
    This item is not returnable
    In Stock
    $4.20
    Tail Hose#29

    Pump Diagram

    Tail hose

    Part #190642GS
    In Stock
    $23.15
    Pressure Washer Screw#71

    Pump Diagram

    Pressure washer screw

    Part #190655GS
    In Stock
    $8.65
    Brg, Ndl, Th#65

    Pump Diagram

    Brg, ndl, th

    Part #190650GS
    In Stock
    $85.80

    Symptoms for gas pressure washers

    Choose a symptom to see related pressure washer repairs.

    Main causes: stale fuel, gummed up carburetor, engine needs tune up, throttle and choke controls need adjustment, bad recoil starter
    Main causes: faulty unloader valve, bad pressure regulator
    Main causes: broken recoil spring, damaged recoil starter
    Things to do: tune up the engine, inject pump saver into the water pump when storing the pressure washer for the winter
    Main causes: overfilling engine with oil, improper fuel/air mixture, choke system problems, dirty carburetor, engine needs tune up
    Main causes: pump running for more than 5 minutes when the spray wand isn't being used, faulty pressure relief valve, bad unloader valve
    Main causes: insufficient water supply, clogged water inlet screen, clogged pressure hose, faulty pump check valves, stuck unloader valve
    Main causes: using a high-pressure spray tip when applying detergent, clogged siphon tube, chemical injection system failure
    Main causes: dirty air filter, stale fuel, clogged or dirty carburetor, bad unloader valve

    Repair guides for gas pressure washers

    These step-by-step repair guides will help you safely fix what’s broken on your pressure washer.

    How to install a pressure washer chemical injection kit

    The chemical injection valve draws detergent into the pump. If it’s not drawing detergent, use a repair kit to replace the chemical injection valve.

    Repair difficulty
    Time required
     15 minutes or less
    April 1, 2013
    By Lyle Weischwill
    How to install a pressure washer O-ring kit

    O-rings seal fittings on the pressure washer pump. Damaged seals allow water to leak from the pump. Follow these steps to replace the O-rings in a leaking pressure washer pump.

    Repair difficulty
    Time required
     45 minutes or less
    April 1, 2013
    By Lyle Weischwill
    How to replace a pressure washer pump

    The pump can be damaged by air in the inlet water supply or by chemicals that remain in the pump body after using the chemical injection system. Follow these steps to replace a damaged pump.

    Repair difficulty
    Time required
     15 minutes or less

    Articles and videos common to all pressure washers

    Use the advice and tips in these articles and videos to get the most out of your pressure washer.

    August 30, 2022

    How to enjoy all the online benefits we offer on our Sears PartsDirect website

    By Lyle Weischwill

    Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.

    August 11, 2022

    Tapping into a new feature in the Search Bar on Sears PartsDirect

    By Lyle Weischwill

    Learn about a new feature added to the Search Bar on Sears PartsDirect

    June 29, 2022

    Top questions about Sears and Sears PartsDirect

    By Lyle Weischwill

    Get answers to frequently asked questions about Sears and Sears PartsDirect.