Stanley Black & Decker DH3500, DH9000, DH1500 user manual First 10 / 20 Hours of OPERATION, Check

OPERATION

Check the chain adjustment bolts and secure the nuts if required.

Check the Housing Cover plate bolts and tighten if needed. Check the hydraulic hoses, fittings and valves for any leaks and repair as required.

With the machine turned off, oil the chain over the top sprocket with a heavy duty gear oil such as Mobil Gear 600 Series. Refer to the table below for recommended chain oil.

Ambient Temperature	Lubricant Rating (SAE)	Viscosity Grade
		(Hydraulic Fluid)
23° - 41°F / -5° - +5°C	20	46 - 68
41° - 104°F / 5° - 40°C	30	100
104° - 122°F / 40° - 50°C	40	150 - 220
122° - 140°F / 50° - 60°C	50	320

FIRST 10 / 20 HOURS OF OPERATION, CHECK

With the drop hammer in a vertical position and the carrier turned off remove the Housing Cover plate. Check the chain tension. The chain should move about 1/2 inch/10-15 mm at its center point. To adjust the chain, loosen the Tensioning Bolt lock nuts (Item 32 DH1500 or Item 30 DH3500) and the Clamp Nut (Items 41-42 DH1500 or Items 34-35 DH3500). Adjust the Tension Bolts evenly (so that the lower shaft/ sprocket are kept parallel). See Figure 4 below.

Note: The above check should be performed at 10 hour intervals of operation until the chain beds in. After 20 hours the inspection can be performed monthly or based on every 100 hours of operation.

Lower	Sprocket
	Spacer
Sprocket	Adjuster
Shaft	Bracket
	Nut
	Half Nut
Bearing	Washer
	Bearing
Nut	Nut
Washer	Washer
Hex Head Setscrew	Hex Head Setscrew
(Long)	(Short)

Figure 4. Lower Sprocket Assembly

Remove the rubber inspection cover at the top of the drop hammer and check that the motor nut is tight. Replace the inspection cover.

Standing clear of the machine, start the drop hammer and SLOWLY rotate the chain until the chain Connecting Plate Assembly is accessible. Turn the carrier off and disconnect hydraulic hoses.

Check this assembly for signs of excessive wear, and replace as required.

Lubricate this assembly and the chain. Refer to the table on the previous page.

Replace the Housing Cover.

Tip the drop hammer forward and slide the weight out as described Adjusting Impact section of this manual.

Inspect the Hammer Connecting Pin and replace if excessively worn.

Liberally grease the Hammer Connecting Pin USE A LITHIUM BASED GREASE WITH NGLI 1 or 2 RATING (Mobilgrease HP or Shell Alvania EP) and replace the hammer as described in Adjusting Impact section of this manual.

It is worthwhile at this stage to dress the hammer tip and remove any excessive burring.

TRAVEL AND STORAGE

1.Ensure the travel lock is installed before transporting the drop hammer.

DH USER MANUAL 13