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When lubricate the chisel, the hammer must be standing upright against the chisel with enough down
pressure applied to force the chisel into the hammer. This will prevent excessive grease getting into the
impact chamber which could cause the hammer to lose power due to cushioning, or to stop operating due to
a hydraulic lock in the impact chamber.
Failure to lubricate the hammer regularly will reduce the life of the chisel, the chisel bush and front bush.
Recommended grease products by makers:
For other than those recommended consult PRODEM or our dealer prior to use.
7.5. Gas
DANGER!
Using other gases could result in an explosion. Use pure nitrogen; 99.8% purity, only.
The PRODEM hammer is a gas assisted type hydraulic hammer. The gas prefilled in the back-head gives
strong impact power and the gas prefilled in the accumulator decrease the pressure fluctuation in the
hammer. For this type of hammer, operating performance of hammer is under the control of the gas pressure.
Therefore, the charging pressures in these gas chambers are very important factor in the hammer and must
always be maintained within the specified limits(refer to Section “
4. Technical specifications
”).
This section describes how to fill the gas and check the gas pressure in the back-head and accumulator of
your hammer. Use only pure nitrogen of 99.8% purity and ensure that no other gas, e.g. air or oxygen is
used. Gas charging kits should be on hand all the time, to allow the following checking and maintenance
work to be performed.
7.5.1. Checking and charging the gas in the back-head
If the impact power of the hydraulic hammer starts to drop, the gas pressure in the back-head should be
checked.
The back-head need not to be refilled until the gas pressure has decreased to below the specified value. In
general, checking the back-head gas pressure recommended at least every 50 hours or weekly. And, Refill
the gas if necessary.
Note:
When checking or charging the gas pressure, always lay the hydraulic hammer flat without any contact force
applying to the chisel. The gas pressures should be checked with the hammer at the ambient temperature
before operating or at the gas temperature of 60°C to 70°C (140 to 158°F) after operating.
Maker Grease Product Name
CALTEX MULTIFAC EP2
CASTROL SPHEEROL EP2
ESSO RONEX MP2
GULF CROWN EP2
MOBIL MOBILUX EP2
SHELL ALVANIA EP2
TOTAL MULTIS EP2
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