Troubleshooting

If symptoms of poor performance develop, the following chart can be used as a guide to correct the problem.

When diagnosing faults in operation of the machine or tool, always check that the hydraulic power source is supplying the correct hydraulic flow and pressure as listed in the table. Use a flowmeter known to be accurate. Check the flow with the hydraulic oil temperature at least 80 °F/27 °C.

Problem	Cause	Solution
Machine will not start.	Fuel filter plugged.	Replace fuel filter.
	No fuel.	Add fuel.
	Defective spark plugs.	Remove plugs, check gap, clean or replace.
	Tool circuit switch is on.	Turn tool circuit switch off.
	Battery not connected.	Attach battery cables, check wires.
	Weak battery.	Test battery, charge or replace.
	Solenoid not working.	Check solenoid operation and electrical
		connections.
Fluid blowing out of fluid	Hydraulic tank overfilled.	Correct fluid level.
reservoir vent.	Pump suction leak.	Check suction connections.
Machine stalls when track	Not enough throttle.	Increase throttle setting/use low range.
controls are pushed.
controls are pushed.	Heavy load.	Increase throttle setting/use low range.
	Over maximum pay load.	Max load 1000 lb/454 kg.
Hydraulic tool will not operate.	Tool circuit switch is OFF.	Turn tool circuit switch ON.
	Not enough throttle.	Move throttle to FAST position.
	Incorrect tool/hose connection.	Check for correct connections.
	Flow selector switch not switched	Check that the flow selector switch is set to 5 or
	ON.	10 gpm.
	Incorrect hose connection to tool.	Make sure the tool hose circuit goes from left
		(pressure) fitting to tool and back to the right
		fitting (return). Fluid always flows from the male to
		female fittings.
	Quick disconnect fittings.	Detach from hose, connect set together and
		check for free flow.
	Pump coupling defective.	With the engine not running: check the coupling
		between the pump and engine that it is engaged
		and is not damaged. Caution: Keep hands clear
		of rotating objects.
	Suction hose kinked.	Make sure suction hose from fluid reservoir to
		pump inlet has a smooth curve.
	Solenoid not working.	Check solenoid operation and electrical
		connections.
	Tool is defective.	Refer to tool manual.
	Relief valve defective.	Have machine serviced.

20 ► MHP3 User Manual

MHP3 specifications

Stanley Black & Decker has long been a leader in the tools and hardware industry, and their MHP3 model exemplifies the brand's commitment to innovation and quality. The MHP3 is a multi-use power tool, expertly designed to meet the rigorous demands of both professionals and DIY enthusiasts alike.

One of the standout features of the MHP3 is its powerful motor, delivering robust performance for a variety of tasks. With variable speed control, users can easily adjust the tool's power to suit specific applications, ensuring optimal results whether drilling, fastened, or cutting. The ergonomic design of the MHP3 ensures a comfortable grip, reducing fatigue during prolonged use.

The MHP3 incorporates advanced cordless technology, which adds a layer of convenience and mobility for users. Powered by a high-capacity lithium-ion battery, it offers extended run times and can be charged quickly, allowing for minimal downtime on jobs. The battery life indicator is a thoughtful addition, helping users monitor remaining power and plan their tasks accordingly.

Another remarkable characteristic of the MHP3 is its versatility. It comes with interchangeable attachments, allowing users to tackle a multitude of projects without needing multiple tools. This adaptability makes it a favorite among professionals who require a reliable tool that can efficiently manage different jobs on-site. The tool's compatibility with a wide array of accessories further enhances its functionality.

Safety features are paramount in tool design, and Stanley Black & Decker has ensured that the MHP3 is equipped with several. The integrated safety switch prevents accidental startups, while the durable outer casing protects internal components from damage during rigorous use.

In addition to its functional capabilities, the MHP3 is also designed with aesthetics in mind. With a modern and sleek profile, it fits well in any tool collection while being practical for everyday use.

Overall, the Stanley Black & Decker MHP3 stands out as a comprehensive power tool solution. Its combination of power, versatility, and safety features makes it an indispensable addition to any workshop or job site, embodying the brand's commitment to delivering quality tools that meet the needs of consumers across various sectors. Whether you're a seasoned professional or just starting on home improvement projects, the MHP3 is engineered to deliver outstanding performance and reliability.

TROUBLESHOOTING

Problem

Cause

Solution

of rotating objects.

MHP3 specifications