HP sells the plastic swing plate assembly and fuser gear for $84.55.
At PrinterTechs you get both of those items PLUS our patent pending custom metal gear for $79.
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| Swing Plate Kit includes the following: |
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Swing plate assembly RM1-0043 |
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PrinterTechs metal gear with bearing (patent pending) |
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Fuser gear (upgraded design) |
 Click to purchase. $79
Outside the US? Email or call for shipping options |
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The patent pending custom metal gear is available separately (spacer disc included).
Click to purchase $65.
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Finally, a definitive solution for the swing plate problem in HP's 4200, 4300, 4250, 4350 series printers!
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After almost a year of research and testing we have created a precision engineered gear with bearing, made right here in the USA, patent pending. This is an industry first and the only long term solution to fix the problematic swing plate issue inherent in the 42x0 and 43x0 series Laserjets.
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A common problem with these models is the relatively quick failure of the swing plate gear. This is the gear that drives the fusing assembly. It’s where “the rubber meets the road” so to speak between the printer's gear drive and the fuser. If the teeth wear down the fuser won’t rotate. If the fuser won’t rotate you’ll hear grinding noises, get paper jams, see various error messages, and in general you probably won’t be very happy. What to do? We’ve seen the teeth on these gears worn to the point of failure in as little as 110,000 pages. That’s about half of the maintenance cycle! Hmmm, not good.
So how do you fix this?
A. Short method - only replacing the black gear
In most cases you will only need to replace the black swing plate gear with our metal gear, not the white swing plate gear. This is fairly easy and the instructions are given further down the page. If both the white gear and black gear are worn out you will need to replace the entire swing plate assembly. |
B. Long Method - replacing the entire assembly
If both the black gear and the white gear are worn out, you’ll need to replace the entire swing plate assembly. You cannot replace the white gear without replacing the entire swing plate assembly; there are no shortcuts for replacing the white gear. Fortunately the white gear doesn't wear out as often. Here are the instructions for replacing the entire swing plate assembly. |
If you need to replace the entire assembly you can send your printer in to us for repair or replace the assembly yourself. This is a big job, figure several hours, and there are several cautions involved: don’t strip any of the screws, don’t break the fan connectors, good luck with the springs 
— they're tricky to re-install.
The Short Method
Instructions for swapping the black plastic swing plate gear with the metal gear
Step 1: Take The Spacer from the New Assembly
Getting access to the black gear:
First, turn your printer off and unplug it. Facing
the back of the printer, you need to remove the hinged back cover. Press inward on each hinge tab to release the tabs and free the back cover.
Press upwards on the blue levers located on each side of the fuser and simultaneously pull the fuser towards you to remove the fuser.
Remove the formatter cover panel by grasping the panel firmly and sliding it free towards the back of the printer.
Remove the screws circled below left, which hold the formatter in place. Then remove the formatter by sliding the formatter towards the back of the printer, as shown below right.
CONTINUED . . .
