Simpson PS4240H User Manual
Pressure Washers
PS4240H
Pressure Washer
Operator’s Manual
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INTRODUCTION
Thank you for purchasing this Simpson® pressure washer. For nearly 50 years, Cleaning and
Paint Professionals have relied on the superior quality of Simpson Cleaning Systems for their
pressure washing needs. Whether you purchased this machine to produce income or simply
wanted the best pressure washer on the market today, we truly appreciate your business.
Please take time to carefully read this manual and become familiar with your pressure washer.
It is extremely important to know the applications, limitations and hazards associated with using
pressurized cleaning equipment.
Simpson® pressure washers are designed to provide years of service for professional use.
Proper use, care, and maintenance of this machine will provide a significant return on your
investment.
Prior to shipping, this machine was tested to ensure it met the performance and quality standard
that Simpson® has long built its reputation.
GOOD CLEANING!!!
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Table of Contents
1.1 - Danger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 - Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3 - Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4 - Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.0 Operating Instructions 5
2.1 - Machine Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 - Hose Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 - Before Starting Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.4 - Starting Gasoline / Diesel Engine Machines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.5 - Pressure Washing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.6 - Stopping the Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
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5.0 Maintenance 10
5.1 - Pump Crankcase Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.2 - Preventative Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
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21Pressure Washer Limited Warranty0.7
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1.0 Safety Do’s and Don’ts
This machine produces a high pressure spray, follow these instructions to avoid the risk of injury.
1.1 Danger
- Wear proper face protection when operating a pressure washer.
- Never aim spray gun at yourself, another person, animals or plants
- Keep hands and feet clear of the cleaning nozzle at all times.
- Operate in well ventilated areas ONLY!
- Use ONLY those parts and accessories recommended for these machines.
- Never operate machine without Belt Guard securely in place.
1.2 Warning
- Read all instructions and familiarize yourself with the unit before operating.
- Read engine manual instructions completely.
- Always engage the trigger safety lock when the gunvalve is not in use.
- Relieve the pressure in the system before uncoupling hoses.
- Never start the machine until the quick couplers are checked to make sure the sleeves are locked.
- Do not tamper with unloader valve adjustment or alter engine speed.
- Do not fill the fuel tank when the engine is running or still hot.
- Do not use on unsupported elevated surfaces (i.e. ladders).
- Do not try to repair a leak in the hose or connection while the system is under pressure.
- Do not substitute any component part on this machine.
- Use ONLY Simpson® replacement parts as originally installed.
- The use of incorrect parts could cause serious personal injury.
- Always keep hands and fingers clear of cleaning nozzles.
- Always relieve the pressure in the system before uncoupling the quick couplers.
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1.3 Caution
- Use ONLY the cleaning nozzle size designed for your model.
- Do not start the machine until water is turned on at the faucet and water is flowing from the end of the
extension.
1.4 Notice
- Close fuel valve when transporting or storing unit.
- Let the machine run for several minutes before starting to pressure-wash.
- Check oil level in engine each time gas tank is filled.
- Keep air filter clean and engine in tune.
- Keep incoming water filter clean.
- Incoming water supply must deliver gallons per minute greater than machine capacity. If
questionable, check supply at machine. If supply is insufficient, do not operate from this outlet. For
residental use, the outlet closest to the meter tap will usually deliver the highest gallons per minute output.
- DO NOT connect to shallow wells used for lawn sprinkling. Connect only to clean city water supply or deep
domestic well.
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2.0 Operating Instructions
2.1 Machine Preparation
1. Check oil level in the pump and fill with
proper grade of oil (Fig. 2.1-1) (See Pump
Maintenance).
2. Check engine oil level and fill with proper
grade oil if necessary (Fig. 2.1-2).
3. Check fuel supply (Fig. 2.1-3). Fill if
necessary (see engine owner’s manual.)
4. Check the hose, gun, and accessories for
damage or wear. Repair or replace if
necessary.
5. Check the female quick-couplers for oring seals. Replace if necessary.
2.2 Hose Connections
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