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Service Analog

Cogs and Magnets


Introduction

To use a tank or drum on the processor (without the JOBO Lift attached) a magnet must be mounted on its bottom. You must have a cog installed on a tank or drum lid to allow coupling with the accessory JOBO Lift or Autolab processor.

Some tanks and drums come with a magnet or cog already installed, some do not. At least one of these mounting systems must be present to use a tank or drum on the processor. See the instructions below to determine if you need to obtain a magnet or cog for the tanks or drums you own, or intend to purchase.

The mounting procedures below will prepare your tank or drum for use on your JOBO rotary processor.


Mounting a Magnet On a Tank or Drum

To use a tank or drum on a manual processor (without the JOBO Lift attached), a magnet must be mounted on its bottom. A magnet is not required for any of the Autolabs.

Magnet PackageThe Magnet, part number 1504, will allow you to use 1500, 2500, and 2800 series tanks or drums on a magnet drive processor. (The 3000 series drums are too large in diameter to use a magnet coupling.) This magnet is permanently attached to the tank or drum in the following sequence. You will need one magnet for each tank or drum you wish to use.

  1. Remove the lid from the tank or drum.
  2. Note the location of the four pins on the magnet. Note also the four short raised tubes on the bottom of the tank or drum.
  3. Place the tank or drum upside down on a smooth, hard surface.
  4. Align the four pins with the raised tubes, and press the magnet down vigorously.
  5. Check that there is no gap between the magnet and the bottom of the tank or drum.

Magnet MountWhen the magnet is properly mounted, it should not come off. If the magnet does not stay securely on the tank or drum, follow this procedure. After doing the above steps, turn the tank or drum right side up. Place a piece of wood (such as a 2x4") slightly longer than the depth of the tank or drum, into the bottom of the tank. Center the piece of wood in the tank. Rap the top end of the wood with a hammer. Inspect the mounted magnet for gaps. Repeat if necessary.

WARNING: Do not try and mount the magnet on the tank by pounding on the magnet. This will likely damage the magnet or split the tank.

To use a magnet-equipped tank or drum on a JOBO Lift equipped processor or Autolab, simply add a Cog (#1505) to the lid. Do not remove the magnet when using the tank or drum on the JOBO Lift or Autolab.

If you are purchasing a tank or drum, note its four-digit part number. If the part number ends in '1' (such as 2521 or 2551, etc.), it already has a magnet attached. All other tanks and drums do not come equipped with a magnet. Tanks that have the last number of '3', have cog type lids. These lids would have to be replaced to use them with a magnet drive processor. Replacement lids (without cap, funnel, or beaker) are available as parts from JOBO. The 1500 series requires #91034, and both the 2500 and the 2800 series require a #91036 lid. (There is no non-cog lid available for the 3000 series drums.) The #03046 membrane cap is needed by all three series lids.

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Mounting a Cog On a Lid

You must have a cog installed on a tank or drum lid to allow coupling with the JOBO Lift or Autolab. Some tanks come with the cog already installed. If you are purchasing a tank, check the JOBO part number of the tank. If the first or last digit of the four digit code is a '3' (3010, 2523, etc.), then there is already a cog installed in the lid. If the first or last digit is not a '3', then you will need to purchase a Cog (#1505) for the tank or drum.

Cog PackageOne cog for each tank or drum is required, as they are permanently mounted into the lid, and cannot be removed. If you wish to keep the lid for hand or magnet processing, get a replacement cog lid. The JOBO part number for the replacement cog lid in the 1500 series is #1503. Both the 2500 series and the 2800 series use the same replacement lid, #2503. This replacement lid comes with a funnel and a stopper. (The stopper is placed in the funnel only when replacing the beaker. The stoppered funnel is used exclusively for print processing with a lift.) The 3000 series of drums cannot be used with the magnet drive. 3000 series lids are always supplied with a cog.

You may use the lift with a tank or drum having a magnet attached on the bottom. The daylight loading tank #2400, or the discontinued series 1000, 2000, and 4000 tanks or drums cannot be equipped with a cog.

The procedure for mounting a cog is the same for all tank or drum lids.

  1. Remove the lid from the tank or drum. Remove the red membrane cap and funnel or beaker.
  2. Place the lid, red ring down, on a hard and smooth surface.
  3. Place the cog, wide side down, into the opening for the cap, at a slight angle.
  4. Press the cog down with your hands. (You may find it helpful to lean towards the lid to apply a firm pressure.)
  5. Examine the seam between the cog and the lid for gaps. When seated correctly, there will be no gap between the cog and lid. (If you can place a fingernail between them, the cog is not seated fully.)

Cog MountIf you cannot seat the cog fully, by hand, use this procedure. Seat the cog as far as you can by hand. Place a flat piece of wood, on top of the cog. Rap the board smartly (centered over the cog) with a hammer. Repeat as necessary until the cog is fully seated.

If the cog comes off the lid during processing, it was not completely seated. Re-seat the cog.

The cog has a small (1 1/2" or 35 mm) red ring that functions as a washer and seal between the lid and lift. It is located just inside the gear ring. This ring will wear with long, heavy use, and may need replacement. If you find the washer is staying on the lift when you remove the tank or drum, replace it. The cog lid washer's part number is #07095. The tank lids that come with the ATL-1000 processor do not have a washer installed in the lid. If you wish to use one of these lids, be sure to place a washer in the lid. If you use a lid without a washer, the junction of the JOBO Lift and tank will leak.

Never try to remove an installed cog from its lid, as you will break either the cog or the lid.

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