Hp cp4005n / knocking noise

[cucuklotz]

HI,
I know it has to do with lift motor.I checked and cleaned paper detection sensor.When I actuate manually the lift stops without fail every time.I also adjusted actuator down to make sure that as paper is lifted it actuates in time to stop lift.The spring on lift assembly is connected and I swapped out cassette to eliminate that as cause of problem.I couldn't really tell if any gears on assembly had hairline crack.What usually is cause of problem when you've seen this problem on this model?Do I need to replace LIFT ASSEMBLY.
THANKS ANDY

[JustManuals]

Re: Hp cp4005n / knocking noise

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[Wild Bill]

Re: Hp cp4005n / knocking noise

This would be the same a s a clj-4700 and yes I have seen this.
I would check the cross brace that would be under the paper tray, they get bent and will cause this; Just bend ( Reform lol) it back probly by pushing down;
If not then replace lift motor.

[cucuklotz]

Re: Hp cp4005n / knocking noise

Thanks wild bill,i just ordererd lift motor assembly> ill let you know how it turned out>
andy