Impact Products Digital Concrete Test Hammer CN652 - Manual (Page 17)

• Pull the hammer mass (14) off the hammer guide bar together with the impact
spring (16) and sleeve (17).
• Remove the felt ring (18) from the cap (9).
6.4.2 Cleaning
• Lay all parts except for the housing (3) in kerosene and clean them using a
brush.
• Use a round brush (copper bristles) to clean the hole in the impact plunger (1)
and the hammer mass (14) thoroughly.
• Let the fluid drip off the parts and then rub them dry with a clean, dry cloth.
• Use a clean, dry cloth to clean the inside and outside of the housing (3).
6.4.3 Assembly
• Before assembling the hammer guide bar (7), lubricate it slightly with a low
viscosity oil (one or two drops; viscosity ISO 22, e.g. Shell Tellus Oil 22).
• Insert a new felt ring (18) into the cap (9).
• Apply a small amount of grease to the screw head of the screw (20).
• Slide the hammer guide bar (7) through the hammer mass (14).
• Insert the retaining spring (15) into the hole in the impact plunger (1).
• Slide the hammer guide bar (7) into the hole in the impact plunger (1) and push
it further in until noticeable resistance is encountered.
Prior to and during installation of the system into the housing (3), make
sure that the hammer mass (14) does not get held by the pawl (13).
Hint: Press the pawl (13) briefly.
• Install the system into the housing (3).
• Insert the compression spring (12) and screw the rear rear cover (11) into the
housing (3).
• Insert the two-part ring (10) into the groove in the sleeve (17) and screw on the
cap (9).
• Carry out a performance check.
Send in the device for repair if the maintenance you perform does not
result in correct function and of the calibration values specified on the testing
anvil are not achieved.
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