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13
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, ttings 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
MONTHLY 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: In the rst month of operation this should be
done weekly until the chain beds in.
Figure 4. Lower Sprocket Assembly
Remove the rubber inspection cover at the top of the drop
hammer and check the motor nut is tight. Replace the
inspection cover.
Lower
Sprocket
Shaft
Bearing
Nut
Washer
Hex Head Setscrew
(Long)
Hex Head Setscrew
(Short)
Washer
Nut
Bearing
Washer
Half Nut
Nut
Adjuster
Bracket
Sprocket
Spacer
OPERATION
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.