Stanley Black & Decker MHP3 manual Engine Maintenance, Hydraulic System Maintenance

MAINTENANCE

fluid causes rapid wear and/or failure of internal parts.

Follow the maintenance instructions contained in the en- gine manual.

ENGINE MAINTENANCE

Follow the maintenance schedule and general mainte- nance instructions in the engine maintenance and op- eration manual furnished with the unit. Normal mainte- nance includes:

•Check the air filter daily. Clean if necessary.

•Replace dry air filter every 200 hours of operation.

•Replace fuel filter every 100 hours of operation.

•Change engine oil after first 50 hours of operation, then after every 200 hours of operation. Change more often if cold, moist, or dusty conditions exist.

•Check oil level daily.

•Change oil filter when engine oil is changed.

•Remove dirt and debris from engine with a cloth or brush daily. Do not use water spray.

HYDRAULIC SYSTEM MAINTENANCE

Observe the following for maximum performance and service life from the hydraulic system.

•Always keep hydraulic system and fluids clean.

•Keep water out of fluid. (See 1. below.)

•Keep air out of hydraulic lines. Hydraulic system overheating and foam at the hydraulic tank breather indicate air is present in the lines. Keep all suction line fittings and clamps tight.

•Hydraulic system wear is noted by increased heat during tool operation, reduced tool performance and eventual system breakdown.

•Operate with the fluid temperature at 50–140 °F/10–

60 °C for improved seal and hose life, and maximum efficiency.

1.Filling The Reservoir

Make sure the engine is stopped before opening the filler cap. Add fluid as needed. Fill slowly with the recommended fluid.

Stop filling when the sight gauge shows full. Fluid

must be visible in the sight gauge at all times.

Secure the filler cap before restarting the engine.

–– Change the hydraulic filter element every 200 hours of operation. Change more often if cold, moist or dusty conditions exist.

–– Check oil cooler for debris. Remove debris with air pressure.

2.Removing Condensed Moisture From Hydraulic Fluid

Condensation is a frequent problem with cool mo- bile hydraulic circuits. This condition occurs in moist or cold climates. When warm air in the hydraulic tank draws moisture from the cooler air outside, wa- ter accumulates in the tank.

–– Check hydraulic fluid level daily. Add fluid per specifications in this manual (Refer to Hydraulic

Fluid in this section).

–– Remove condensed moisture from the hydrau- lic fluid by pumping the hydraulic fluid into a 5 gal/20 l container through the pressure hose. Make sure the engine is at idle when performing this procedure. When the hydraulic reservoir is empty, turn the engine OFF immediately.

–– Allow the fluid to sit long enough for the wa- ter to settle to the bottom of the container.

Slowly pour the fluid back into the hydraulic tank, avoiding the water at the bottom of the container.

3.Checking Suction Hose

Make sure the suction hose (from the hydraulic tank to the pump inlet) is not kinked and is clamped se- curely. This reduces the risk of pump cavitation and sucking air into the system. All pump fittings should be tight.

4.Checking Hydraulic Lines and Fittings

Check for loose fittings, leaks, etc., throughout the hydraulic circuit.

–– Check hydraulic lines and fittings for leaks, kinks, etc. daily. Do not use your hand to per- form this check.

MHP3 Diesel User Manual ◄ 19