A grinding problem can occur with normal printing;
however, most of the time it happens after changing out
the fuser assembly. After replacing the fuser you may hear
a rumbling sound from the rear side of the printer. This
rumbling, or grinding, is due to the newly replaced gears
working with the worn fuser drive gears.
When the
printer is turned on, the fuser and exit rollers spin at a
very slow speed for about 2 seconds then run at full speed
for about 5 seconds. The second faster speed is usually
when you will notice the noise starts. The main drive
assembly initially turns the fuser, and then the fuser
drive assembly engages the fuser at full speed using the
set of four fuser drive gears.
The parts to
replace:• Cluster of Fuser Driver Gears:
RU5-0956, RU5-0957, RU5-0958 & RU5-0959
• Fuser Thrust
Stopper (Clip) - RC2-0657
• Fuser Gear - RU5-0966
• Fuser Pressure Roller Gear - RU5-0964
All of
these parts HP P3005 Gear Kit - P3005-GK
All of
these parts (7) can be purchased together from Laser Pros
International using part #P3005-GK.
NOTE:
when replacing the plastic Thrust Stopper Clip (RC2-0657),
be sure to have the longer part pointing down (see image).
Failure to do so will cause paper to jam at the fuser or
to jam when printing duplex mode.
*This Tech Tip is contributed by Laser Pros. Visit
their website
www.LaserPros.com or email any
question to
marketing@laserpros.com. 
