This is a long metal piece with an attached black plastic channel on which the Fuser Exit Actuator hangs (2 Phillips head screws from the outer face). Remove the “Inner Cover” (2 Safety-Torx T15 screws from the inner face). If you slide the plastic pin out of place with your thumb, the gate can come off (see Photo #2)Ģ. If you wish to remove the Exit Gate, it is held captive by a small black plastic pin which holds the front-most pivot point. The yellow Exit Gate pivots on the top of this “Outer Cover”. Remove the “Outer Cover” (3 Safety-Torx T15 screws from the outer face). The “Top” of the fuser is where the yellow Fuser Exit Gate can be found. The “Outer Face” is the face which is visible when you open the machine’s left door to go remove the fuser… it has a bunch of warning labels on it and the two thumb screws for removing the fuser are found on the bottom edge of this Outer Face. You’ll also find the CRUM Reset Fuse Board tucked into the rear end. The “Rear” end is the end with most of the gears and the main fuser connector which interfaces with the machine. Let’s start by getting oriented (refer to Photo #1).
#Xerox 7855 manual driver
Phillips Head #2 Screwdriver (also a 5.5mm hex driver is helpful) These are high-domed screws, so if you’re stuck and you don’t have a Safety T-15 driver, you could use needle-nose pliars to work them off one turn at a time (time consuming, but doable).
#Xerox 7855 manual drivers
Safety Torx T-15 Driver (Safety Torx drivers are the kind with the hole in the center of the driver bit… not everyone has one of these handy… there are five of this type of screws holding the Outer & Inner Covers in place. Also, there are printer models which have their own part numbers. There is a low speed version and a high-speed version.
There are two very similar versions which both come apart the same way.
#Xerox 7855 manual full
It is absolutely critical to apply plenty of Heat Belt Oil to the Slip Sheet (both sides… and work it in so it fills all the voids in the fabric), this way your rebuilt fuser will go the full cycle. Eventually the heat belt will be deformed or it will tear. What happens is the Slip Sheet dries up and the friction increases until eventually the fabric tears off of its mounting tabs and bunches up inside the heat belt.
The drying up of the oil on the Slip Sheet is responsible for a majority of the fuser failures. The Slip Sheet needs to have adequate lubrication to function properly (Fuser Heat Belt Oil). It is designed to allow the heat belt to slip across it as it rotates. Inside the Heat Belt there is a piece of fabric-like material called the “Heat Belt Slip Sheet” which lines up inside the heat belt opposing the pressure roller’s nip. The pressure is done by a more traditional looking Pressure Roller (rather than a pressure sleeve as we’ve seen in recent models). Inside the Heat Belt you’ll instead find a Thermal Control Assembly which has the thermistors and thermostats mounted to it. The heat on the heat belt’s surface is produced by a piece which is adjacent to the heat belt (not inside of it, as one might expect). Instead these use a newer technology known as induction heating which reduces the amount of energy required to keep it hot. Then for the heating they don’t use traditional fuser lamps. For one thing they use a flexible “Heat Belt” rather than a rigid heat roll like most fusers. They are not typical of other Xerox fusers we’ve covered. These things are well built except for a problem with insuficcient lubricant inside the heat belt which we'll get into. Even a talented tech should allow themselves a good 2 hours to rebuild one for the first t ime. It requires a technician of high mechanical skills to rebuild one of these successfully. You will find this one is relatively time consuming to rebuild, but with the new fusers retailing for over $700.-, they are well worth your time. With some excellent parts now available, it’s time to take these apart and figure out the best way to go about replacing the Fuser Heat Belt, Slip Sheet and Pressure Roller, and the Fuser Reset Fuse. The WC-75xx and WC-78xx family fuser modules are pretty serious pieces of equipment. Control Consoles & User Interface (UI) Parts.Drums, Blades, Charge Rolls & Other Related Parts.
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