Hofmann geodyna 7600, Service Manual

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Ø Using a 2.5mm hex key remove the preloading plate.
Ø Using a 17mm wrench loosen the jam nut.
Ø Using a 5mm hex key, back the set screw off by turning counter/clockwise. Do not lose the ball bearings on each
end of the tranducers. These allow the transducer to center easily on the vibratory member.
Ø If the transducer is being replaced , the lead “+” is already signed on the wire with a black band. Cut the two wires
at the transducer.
Ø The transducer attached to wires 11 and 12 of connector X3 is placed in the front; that one attached to wires 15
and 16 is placed in the rear of the vibratory assembly.
To fi t and mechanically pre-load a transducer, carry out the following steps:
Ø Insert the wires into the transducers: the cables with black band must be fi tted on the positive lead.
Ø The two setscrews M10x1x29 with ball sockets (inverse cones) should be screwed into the vibratory plate of 20-
mm / /0.79inch thickness and the rigid support plate welded to the cabinet.
Ø Put some stiff grease in the recesses at both ends of the transducer.
Put 8-mm Ø ball bearing in the recesses.
Ø Insert the transducer in the slot of the vibratory plate with one of the balls contacting the indentation opposite the
setscrew. Tighten the setscrew until the transducer is centered.
Ø Route the transducers with leads downward to avoid any possible condensation concentration inside of the leads
them selves.
Ø Screw on the locknut M10x1 (17-mm across the fl ats), but do not tie up yet.
Ø Tighten the M10x1setscrews at 0,40 ± 0,05 Nm (3,5 ± 0,4 lbs-in) shown by red arrow.
Ø Fasten the locknut. To prevent the setscrew to turn, hold it with the hexagon wrench 5-mm inserted.
SM HOF GEODYNA 7600 Rel.D