--- title: Maintenance slug: hardware/backpack-maintenance description: Ensure optimal performance of your Carbon AO Backpack with our comprehensive maintenance guide, detailing essential tasks, safe handling practices, and best procedures for longevity. docTags: createdAt: 2024-10-22T22:47:09.107Z --- # Overview Like all equipment, the **AO Backpack **needs regular maintenance to remain in good working condition. :::hint{type="warning"} Adjusting, removing, reconfiguring, or otherwise tampering with any components that are not explicitly flagged here for user maintenance is strongly discouraged, as it can lead to hardware damage and prolonged and costly periods of machine downtime. If you have any questions about what is and is not off-limits, please contact [Carbon Support.](mailto\:support@carbon3d.com) ::: The sections below are organized by the frequency of the maintenance tasks. *** # 3 Months ## Resin Hose Inspection - Inspect the resin hose for leaks or damage.  - Pay particular attention to the section of hose that runs through the pump. - If the hose is damaged, a replacement can be ordered from the [Carbon Shop.](https://shop.carbon3d.com/collections/accessories) - See [Resin Hose Replacement](docId\:s3t7TIa7TXtmtbEoGr8TF) below for installation instructions. ## Resin Hose Inline Filter Inspection Check the inline filter for excessive debris or particulate matter that could obstruct resin flow. 1\. Open the resin cabinet. 2\. Remove the cover from the top of the resin cabinet and place it to the side. 3\. Disconnect the quick disconnect from the resin tank. ::Image[]{src="https://res.cloudinary.com/carbon3d/image/upload/v1730157979/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/Quick-release-remove01.png" size="70" width="2641" height="1288" position="flex-start" showCaption="false"} 4\. Pull the quick disconnect end of the hose through the top of the resin cabinet. ::Image[]{src="https://res.cloudinary.com/carbon3d/image/upload/v1729898758/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/Filter-check-remove-hose02-CALLOUT.png" size="70" width="843" height="915" position="flex-start" showCaption="false"} 5\. Lift the in-line filter out of the clips that hold it in place. ::Image[]{src="https://res.cloudinary.com/carbon3d/image/upload/v1729792158/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/Remove-resin-filter01.png" size="70" width="1650" height="1008" position="flex-start" showCaption="false"} 6\. Place the in-line filter on a tray lined with a blue towel to catch resin. Rest the tray on top of the resin cabinet. ::Image[]{src="https://res.cloudinary.com/carbon3d/image/upload/v1729904590/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/filter-check-filter-on-tray-IMG_8686.jpg" size="70" width="1500" height="1363" position="flex-start" showCaption="false"} 7\. Carefully unscrew the filter cap and set on the tray. The filter chamber is full of resin so resin will spill out. ::Image[]{src="https://res.cloudinary.com/carbon3d/image/upload/v1729904594/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/Filter-check-open-filter01-CALLOUT.png" size="70" width="1173" height="609" position="flex-start" showCaption="false"} 8\. Remove and inspect the cylindrical metal screen. Remove solid debris or particles, using blue towels if necessary. :::hint{type="danger"} **Do not use any solvents as this will contaminate the resin and may affect part quality.** ::: ::Image[]{src="https://res.cloudinary.com/carbon3d/image/upload/v1730158375/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/filter-check-screen-IMG_8690.jpg" size="70" width="1266" height="870" position="flex-start" showCaption="false"} 9\. Empty out the resin from inside the filter, remove any solid debris or particles, using blue towels if necessary. :::hint{type="danger"} **Do not use any solvents as this will contaminate the resin and may affect part quality.** ::: ::Image[]{src="https://res.cloudinary.com/carbon3d/image/upload/v1729904590/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/filter-check-dump-resin-IMG_8691.jpg" size="70" width="1512" height="1512" position="flex-start" showCaption="false"} 10\. Place the metal screen back in the filter housing. 11\. Screw the cover back on the inline filter. 12\. Make sure that the exterior of the filter is free of resin residue. Use blue towels and IPA if necessary. 13\. Pull the quick disconnect connector end of the resin hose back through the front opening of the resin cabinet 14\. Place the filter back in the retaining clips at the top of the resin cabinet. 15\. Connect the quick disconnect to the resin tank. 16\. Replace the resin cabinet cover. *** # 6 Months ## Blade :::hint{type="danger"} **The blade is sharp and can cause severe injury. Use extreme caution when cleaning the blade.** ::: - Confirm the blade is free of solid debris like part supports. - If needed, clean the blade following the procedure from [Operation > Unloading and Cleaning.](docId\:Z5J06e2yhoHwLisiFaRFT) - Check for any visible damage to the blade, such as dents, bends, wear, or cracks, to ensure it remains in optimal condition.  - If damage is found, contact [Carbon Support](mailto\:support@carbon3d.com). ## Bin - Check that the bin is intact and free of resin smears or build up, paying special attention to the top lip on either side of the bin. ::Image[]{src="https://res.cloudinary.com/carbon3d/image/upload/v1730149205/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/Bin-lip-CALLOUT01.png" size="70" width="2278" height="1870" position="flex-start" showCaption="false"} - If needed, clean the bin with blue towels and IPA.  - If the bin is damaged, a replacement can be ordered from the [Carbon Shop.](https://shop.carbon3d.com/collections/accessories) ::::VerticalSplit{layout="middle"} :::VerticalSplitItem ![](https://res.cloudinary.com/carbon3d/image/upload/v1729791289/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/clean-bin-VEG05713.jpg) ::: :::VerticalSplitItem ![](https://res.cloudinary.com/carbon3d/image/upload/v1729791290/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/clean-bin-spout-VEG05707.jpg) ::: :::: ## Basket - Verify that the basket sits properly in the bin. Be sure it is free of damage and that any deformation or damage does not interfere with proper seating in the bin. - If the basket does not sit properly in the bin, it may cause damage to printed parts or to the AO Backpack.  ::Image[]{src="https://res.cloudinary.com/carbon3d/image/upload/v1729791552/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/basket-in-bin-GRAPHICS02.gif" size="70" width="1500" height="1171" position="flex-start" showCaption="false"} - Inspect the handles to ensure they are not bent. - Check the walls and floor of the basket to verify that they are free of dents or warping. - Make sure the basket screen surfaces are not covered or blocked with resin. - If needed, clean the basket with IPA and/or acetone and blue towels. ## Interior Floor - Remove the drip tray and Inspect the interior floor of the AO Backpack. - If needed, clean with blue towels and IPA. - Replace the drip tray. ::Image[]{src="https://res.cloudinary.com/carbon3d/image/upload/v1730149689/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/interior-floor-CALLOUT01.png" size="70" width="1375" height="917" position="flex-start" showCaption="false"} ## AO Platform - Inspect the platform for excessive dents, gouges, or damage which could damage the cassette window or affect part removal. :::hint{type="danger"} **Any damage that projects above the normal printing surface of the platform can damage the cassette window and the blade.** ::: ::Image[]{src="https://res.cloudinary.com/carbon3d/image/upload/v1730151325/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/ao-platform-damage01-CALLOUT.png" size="70" width="918" height="613" position="flex-start" showCaption="false"} - If significant damage is present, remove the platform from production. - Contact [Carbon Support](mailto\:support@carbon3d.com) to submit an RMA. ## Platform Guide Rails - Inspect the two horizontal bars that hold the platform for any damage or excess resin buildup. - Pay particular attention to the mechanism at the back of each rail. - Clean with IPA and blue towels if necessary. ![](https://res.cloudinary.com/carbon3d/image/upload/v1730151560/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/platform_guide_rails_01.png) ## Platform Gates - The platform gates secure the platform during part removal. - Check the gates, especially the back-facing surfaces, to confirm they are free of resin and debris that could impede their function. Clean with IPA and blue towels if necessary.  ::Image[]{src="https://res.cloudinary.com/carbon3d/image/upload/v1730152067/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/platform_gates_CALLOUT_02_IMG_4838_2000x1500.jpg" size="70" width="914" height="494" position="flex-start" showCaption="false"} ## Resin Tank Swap When the resin tank is almost empty, it will need to be replaced with a full tank. Follow the instructions below to swap an empty tank for a full one. **Equipment** ::::VerticalSplit{layout="left"} :::VerticalSplitItem - Full resin tank - Shop towels - IPA ::: :::VerticalSplitItem ::Image[]{src="https://res.cloudinary.com/carbon3d/image/upload/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/resin-tank-swap-refill/Required-equipment01.png" size="60" width="1000" height="484" position="center" alt="Equipment for resin tank swap" showCaption="false"} ::: :::: **Workflow** ::::WorkflowBlock :::WorkflowBlockItem Approach the open resin cabinet - If the resin cabinet is not already open, grasp the back corner of the resin cabinet and pull. The resin cabinet will swing out towards the front of the printer. - Continue until the cabinet is flush with the side of the printer and catches on the foot latch. ::Image[]{src="https://res.cloudinary.com/carbon3d/image/upload/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/resin-tank-swap-refill/Open-cabinet-01-533x533.png" size="56" width="533" height="533" position="center" alt="Open resin cabinet" showCaption="false"} ::: :::WorkflowBlockItem Push the lock button on the quick release connector and pull the hose off. - Be aware that the button mechanism extends out of the opposite side of the clamp. You may need to move your fingers to allow for free movement of the button mechanism. ::Image[]{src="https://res.cloudinary.com/carbon3d/image/upload/v1729791267/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/tank-button-push-01-1000x428.png" size="88" width="1000" height="428" position="flex-start" alt="Disconnect quick release" showCaption="false"} ::: :::WorkflowBlockItem Push the quick release connector into the clip mounted on the back wall of the resin cabinet to keep it out of your way. ::: :::WorkflowBlockItem Remove the empty resin tank from the resin cabinet and place near the full resin tank. ::: :::WorkflowBlockItem Unscrew the cap from the full resin tank. - Do not grasp the filter as this will damage the assembly. ::Image[]{src="https://res.cloudinary.com/carbon3d/image/upload/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/resin-tank-swap-refill/unscrew-cap-01-1000x428.png" size="88" width="1000" height="428" position="flex-start" alt="Unscrew cap" showCaption="false"} ::: :::WorkflowBlockItem Remove the straw assembly and transfer it to the full tank. - Use caution as resin will drip from the straw. - A tray covered with a blue towel can be useful to transport the straw between the tanks. ::Image[]{src="https://res.cloudinary.com/carbon3d/image/upload/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/resin-tank-swap-refill/swap-straw-01-1000x500.png" size="88" width="1006" height="499" position="flex-start" alt="Move straw assembly to new tank" showCaption="false"} ::: :::WorkflowBlockItem Screw the cap onto the resin tank. ::: :::WorkflowBlockItem Clean any drips or smears from the tanks using shop towels and IPA. ::: :::WorkflowBlockItem Move the full tank into the resin cabinet and carefully place it on the shelf. - Use caution as the full tank will be quite heavy. ::: :::WorkflowBlockItem Push the quick release connector onto the quick release nozzle. ::: :::WorkflowBlockItem Carbon recommends leaving the resin cabinet open for easy access to the resin tank. However, if you wish to close it, follow the instructions below. - Press down on the foot latch with the tip of your foot. Then push the cabinet back until it clicks into place at the back of the AO Backpack. ::Image[]{src="https://res.cloudinary.com/carbon3d/image/upload/Education/Automatic-Operation-Suite/AO%20Backpack/Features/foot-latch-gif-02-800x800.gif" size="52" width="800" height="800" position="center" alt="Optionally close cabinet" showCaption="false"} ::: :::: ## Resin Hose Quick Release - Inspect the quick release connector and nozzle.  - Wipe excess resin with a blue towel. IPA may be used on external surfaces only.  :::hint{type="warning"} **Do not use IPA to clean the quick connector nozzle as this can contaminate the resin and affect part quality.** ::: ::Image[]{src="https://res.cloudinary.com/carbon3d/image/upload/v1730155859/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/Quick-connect01-CALLOUT.png" size="70" width="1508" height="1249" position="flex-start" showCaption="false"} Resin Spout - Check the resin spout opening to ensure it is clear of cured resin or debris that could hinder resin flow or introduce particulates into the resin cassette. Resin Tank Shelf - Disconnect the quick release connector from the resin tank. - Remove the resin tank from the resin cabinet and set aside. - Clean any residual resin from the shelf with blue towels and IPA. :::hint{type="warning"} **Do not apply excessive force to the resin shelf (no more than the weight of a full resin container) as excessive weight may damage the scale mechanism housed within it.** ::: ## Shuttle - Check horizontal surfaces for damage, resin debris or resin buildup.  - Clean with IPA and blue towels if necessary. ::Image[]{src="https://res.cloudinary.com/carbon3d/image/upload/v1730156730/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/shuttle_surfaces_CALLOUT_01_1500x2000.png" size="70" width="1109" height="1145" position="flex-start" showCaption="false"} *** # 9 Months ## Resin Hose Replacement Resin hose replacement is part of **preventive maintenance** for the AO Backpack. This task should be done on an **alternating basis by the user and by Carbon**. - At **9 months** - performed **by user** - At** 18 months** - performed **by a Carbon FSE** (Field Service Engineer) ### Required Equipment - 2.5 mm hex wrench - Nitrile glove - Resin Hose Tubing Assembly\* - Petroleum Jelly *Included with the tubing assembly* **\*Resin Hose Tubing Assembly** ::::VerticalSplit{layout="left"} :::VerticalSplitItem The tubing assembly and petroleum jelly are a packaged item that your FSE will leave with you on site between servicing visits. Keep this package on the service storage shelf within the backpack until needed. ::: :::VerticalSplitItem ![Keep resin tubing on service shelf inside the backpack](https://res.cloudinary.com/carbon3d/image/upload/t_auto_quality_format/Education/Hardware/AO-Backpack/AO-Maintenance/Store-resin-hose-assembly.png) ::: :::: :::hint{type="warning"} \*The assembly is **provided by Carbon for regular servicing**. If you need to replace the tubing assembly between preventive maintenance periods, **you may be asked to purchase a replacement** from the [Carbon Shop](https://shop.carbon3d.com/collections/accessories/products/m3-ao-backpack-resin-hose) for your next servicing. ::: ### Hose Removal Process :::::::WorkflowBlock :::WorkflowBlockItem **Swing** the resin cabinet out to its **open** position. ::: :::WorkflowBlockItem **Push the lock button** on the quick release connector and **pull the hose off**. - Be aware that the button mechanism extends out of the opposite side of the clamp. You may need to move your fingers to allow for free movement of the button mechanism. ::Image[]{src="https://res.cloudinary.com/carbon3d/image/upload/v1729791267/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/tank-button-push-01-1000x428.png" size="86" width="1000" height="428" position="center" alt="Detach the hose" showCaption="false"} ::: :::::WorkflowBlockItem ::::VerticalSplit{layout="middle"} :::VerticalSplitItem **Locate** the two black plastic **hose clamps** that hold the resin hose in place at the back of the AO Backpack. ::: :::VerticalSplitItem ![Locate hose clamps](https://res.cloudinary.com/carbon3d/image/upload/v1729791265/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/hose-clamps01.png) ::: :::: ::::: :::::WorkflowBlockItem ::::VerticalSplit{layout="middle"} :::VerticalSplitItem **Unlock** each **hose clamp: ** **a**. Push down on the outer band with your thumb to release the tab and **b**. Pull the tab forward with your forefinger to unlock the hose clamp. ::: :::VerticalSplitItem ![Unlock hose clamps](https://res.cloudinary.com/carbon3d/image/upload/v1729892975/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/hose-clamp-release01.png) ::: :::: ::::: :::WorkflowBlockItem **Free the resin hose** from each hose clamp. ::: :::::WorkflowBlockItem ::::VerticalSplit{layout="middle"} :::VerticalSplitItem Remove the cover from the top of the resin cabinet to expose the **resin pump.** ::: :::VerticalSplitItem ![Remove cover](https://res.cloudinary.com/carbon3d/image/upload/v1729792100/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/open-top-resin-cabinet-VEG06628.jpg) ::: :::: ::::: :::::WorkflowBlockItem ::::VerticalSplit{layout="middle"} :::VerticalSplitItem **Pull the in-line resin filter out** of the clips that hold it in place. ::: :::VerticalSplitItem ![Pull out resin filter](https://res.cloudinary.com/carbon3d/image/upload/v1729792158/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/Remove-resin-filter01.png) ::: :::: ::::: :::::WorkflowBlockItem ::::VerticalSplit{layout="middle"} :::VerticalSplitItem **Flip open** the pump clamp **lever**. ::: :::VerticalSplitItem ![Flip open clamp lever](https://res.cloudinary.com/carbon3d/image/upload/v1729792614/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/Flip-pump-lever01.png) ::: :::: ::::: :::::WorkflowBlockItem ::::VerticalSplit{layout="middle"} :::VerticalSplitItem **Undo the yellow straps** that secure the resin hose in the pump. ::: :::VerticalSplitItem ![Undo the yellow straps](https://res.cloudinary.com/carbon3d/image/upload/v1729792675/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/open-velcro-straps01.gif) ::: :::: ::::: :::::WorkflowBlockItem ::::VerticalSplit{layout="middle"} :::VerticalSplitItem **Lift the hose out** of the ridged brackets on both sides of the pump and let it hang loosely. ::: :::VerticalSplitItem ![Lift the hose out](https://res.cloudinary.com/carbon3d/image/upload/v1729792742/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/remove-hose-from-pump-VEG06645.jpg) ::: :::: ::::: :::::WorkflowBlockItem ::::VerticalSplit{layout="middle"} :::VerticalSplitItem Move to the front of the printer, open the printer door and **flip the resin spout up.** ::: :::VerticalSplitItem ![Flip up the resin spout](https://res.cloudinary.com/carbon3d/image/upload/v1729793516/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/resin-spout-up.gif) ::: :::: ::::: :::::WorkflowBlockItem ::::VerticalSplit{layout="middle"} :::VerticalSplitItem Use a **2.5 mm hex wrench** to unscrew the **spout screw. **The spout screw is locked in the resin spout so it will not fall out. ::: :::VerticalSplitItem ![Unscrew the resin spout](https://res.cloudinary.com/carbon3d/image/upload/v1729793589/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/Resin-spout-unscrew01.png) ::: :::: ::::: ::::::WorkflowBlockItem :::::VerticalSplit{layout="middle"} ::::VerticalSplitItem **Lift the resin spout out** of its bracket and place a **nitrile glove** **over the spout**. :::hint{type="warning"} Make sure the open end of the spout fits into one of the fingers or thumb of the glove. This will prevent leaks while moving the hose. ::: :::: :::VerticalSplitItem ![Lift out spout and place glove on end](https://res.cloudinary.com/carbon3d/image/upload/v1729793641/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/glove-on-spout-VEG06654.jpg) ::: ::::: :::::: :::::WorkflowBlockItem ::::VerticalSplit{layout="middle"} :::VerticalSplitItem Reach behind the AO Backpack and **pull the resin hose out through the slot**. It will help to have a second person at the front of the printer to help guide the hose through the hole. ::: :::VerticalSplitItem ![Pull resin hose out through slot](https://res.cloudinary.com/carbon3d/image/upload/v1729793690/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/pull-hose-out01.png) ::: :::: ::::: :::WorkflowBlockItem **Dispose of the old hose** according to local regulations. ::: ::::::: ### Hose Installation Process **Lubricate Resin Pump** Wipe clean the following surfaces on the resin pump with a blue lab towel or Kimwipe and then add a thin layer of lubricant, using the petroleum jelly provided with the hose assembly. - The **3 rollers** around the central shaft - The **curved clamp wall** that locks the hose into the pump. ![Resin hose contact points shown in magenta](https://res.cloudinary.com/carbon3d/image/upload/t_auto_quality_format/Education/Hardware/AO-Backpack/AO-Maintenance/Lubricate-resin-hose.png "Resin hose contact points shown in magenta") :::hint{type="warning"} Lubricating the hose pump where it contacts the resin hose is **critical to keeping the hose intact **until the next service date. ::: **Install the New Hose Assembly** :::hint{type="info"} This video shows steps 1 - 7 below. Use it as a reference. ::embed[]{url="https://vimeo.com/1020410518?dnt=1"} ::: ::::::WorkflowBlock :::::WorkflowBlockItem ::::VerticalSplit{layout="middle"} :::VerticalSplitItem Take the new resin hose and position the **in-line resin filter** between the filter clips and **push down** to secure it. ::: :::VerticalSplitItem ![Push down resin filter into clips](https://res.cloudinary.com/carbon3d/image/upload/v1729795762/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/install-resin-filter01.gif) ::: :::: ::::: :::WorkflowBlockItem **Push the resin spout** end of the hose **through the back** of the resin cabinet. ::: :::WorkflowBlockItem **Push the quick release connector** end of the hose** through the front opening**. ::: :::::WorkflowBlockItem ::::VerticalSplit{layout="middle"} :::VerticalSplitItem Push the **first direct joint **(white plastic ring) into the **ridged bracket **closest to the front of the resin cabinet. The channel that runs around the circumference of the direct joint fits into the ridge on the bracket. - Make sure the crimps on the crimp clamps are **pointing up.** - Push down firmly so that the hose is secure. ::: :::VerticalSplitItem ![Push first hose joint into bracket](https://res.cloudinary.com/carbon3d/image/upload/v1729795939/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/push-direct-joint-into-pump02-GIF.gif) ::: :::: ::::: :::::WorkflowBlockItem ::::VerticalSplit{layout="middle"} :::VerticalSplitItem Thread the loose end of the hose through the curved channel of the pump and push the **second direct joint** into the ridge on the far bracket. The hose should have a bit of tension on it through the curved channel. - Make sure the crimps on the crimp clamps are **pointing up.** - Push down firmly so that the hose is secure. ::: :::VerticalSplitItem ![Push second hose joint into bracket](https://res.cloudinary.com/carbon3d/image/upload/v1729796007/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/install-second-direct-joint01.png) ::: :::: ::::: :::::WorkflowBlockItem ::::VerticalSplit{layout="middle"} :::VerticalSplitItem Secure the yellow straps that secure the resin hose in the pump. ::: :::VerticalSplitItem ![](https://res.cloudinary.com/carbon3d/image/upload/v1729893459/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/secure-velcro-straps.gif) ::: :::: ::::: :::::WorkflowBlockItem ::::VerticalSplit{layout="middle"} :::VerticalSplitItem Turn the **pump clamp lever** to lock the resin hose. ::: :::VerticalSplitItem ![Switch lever to lock position](https://res.cloudinary.com/carbon3d/image/upload/v1729893534/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/lock-pump01-GIF.gif) ::: :::: ::::: :::::WorkflowBlockItem ::::VerticalSplit{layout="middle"} :::VerticalSplitItem **Push spout end** of the hose through the **slot in the back** of the AO Backpack. You may need to rotate the end to successfully maneuver it through the slot and into the interior of the printer. ::: :::VerticalSplitItem ![Push spout end up into the printer](https://res.cloudinary.com/carbon3d/image/upload/v1729894134/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/threading-hose-through-back02.gif) ::: :::: ::::: :::::WorkflowBlockItem ::::VerticalSplit{layout="middle"} :::VerticalSplitItem At the front of the printer, grab the resin spout and **push it onto** **mounting pins** on the resin spout bracket. ::: :::VerticalSplitItem ![Push resin spout onto mounting pins](https://res.cloudinary.com/carbon3d/image/upload/v1729894174/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/resin-spout-on-bracket-GIF.gif) ::: :::: ::::: :::::WorkflowBlockItem ::::VerticalSplit{layout="middle"} :::VerticalSplitItem Use a **2.5 mm hex wrench** to turn the **resin spout screw** and secure the resin spout. The screw only requires hand tightening. ::: :::VerticalSplitItem ![Screw in the resin spout](https://res.cloudinary.com/carbon3d/image/upload/v1729894210/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/Resin-spout-screw01.png) ::: :::: ::::: :::::WorkflowBlockItem ::::VerticalSplit{layout="middle"} :::VerticalSplitItem **Push the resin hose** into the **hose clamps** at the back of the AO Backpack. Lock the hose clamps to secure the hose. - If the resin hose is not locked in the hose clamps, the hose can be pinched when closing the resin cabinet. ::: :::VerticalSplitItem ![Push resin hose into hose clamps](https://res.cloudinary.com/carbon3d/image/upload/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/hose-clamps01.png) ::: :::: ::::: :::WorkflowBlockItem **Replace the cover** on the top of the resin cabinet. ::: :::WorkflowBlockItem Close the resin cabinet if desired. ::: :::::: ### Recover Backpack Whenever an M3 printer with an AO Backpack is restarted/power cycled (including during and after the installation of a software update), the printer screen will display a “Backpack needs recovery” screen. ::::VerticalSplit{layout="middle"} :::VerticalSplitItem Press the “Recover Backpack” button on the screen to return the machine to normal operation. ::: :::VerticalSplitItem ![Recover Backpack](https://res.cloudinary.com/carbon3d/image/upload/Education/Hardware/AO-Backpack/Recover-backpack.png) ::: :::: :::hint{type="info"} **This is expected behavior, and is not an indication of a problem with the printer, the Backpack, the power cycle, or the software update. ** ::: *** # As Needed ## Resin Tank Refill There are two options for refilling an empty resin tank: - Use resin from 55 gallon drum of DPR 10 equipped with the DPR 10 Drum Pump - Use resin from multiple plastic containers :::hint{type="info"} **Go to **[DPR 10 Drum Pump](docId\:qgBerRo1oUIm3w87Vokb7)** for resin dispensing information.** ::: ### 55 gallon Drum with DPR 10 Drum Pump The resin tank can be refilled directly at the Drum Pump. ::Image[]{src="https://res.cloudinary.com/carbon3d/image/upload/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/resin-tank-swap-refill/tank-refill-drum-VEG05606-1000x1000.jpg" size="60" width="1000" height="1000" position="flex-start" showCaption="false"} :::hint{type="info"} **Carbon recommends placing the resin tank on a stable surface during dispensing as the tank will become quite heavy as it fills.** ::: ### Plastic Containers Chemical resistant plastic containers can also be used to fill the resin tank. These can be 3.2 L bottles of new DPR 10 resin purchased directly from Carbon or bottles that are filled at the DPR 10 Drum Pump and then poured into the resin tank. ::Image[]{src="https://res.cloudinary.com/carbon3d/image/upload/Education/Automatic-Operation-Suite/AO%20Backpack/Maintenance/resin-tank-swap-refill/drum-pump-tank-refill-01-1500x750.png" size="88" width="1508" height="738" position="flex-start" showCaption="false"} :::hint{type="info"} **Filling the resin tank requires approximately six 3.2 L bottles of resin and 10 minutes.** ::: ## Resin Cabinet Cleaning Residual resin may gather on the resin cabinet. 1. Disconnect the resin tank from the resin hose and remove from the resin cabinet. 2. Clean any residual resin from cabinet surfaces with blue towels and IPA. - Use care when cleaning the resin tank shelf to avoid damaging the scale mechanism housed within it. :::hint{type="danger"} **Do not use acetone as this will damage painted surfaces.** ::: ## Resin Tank Cleaning Over time, residual resin will gather on the resin tanks. 1. Disconnect the quick release connector from the resin tank. 2. Remove the resin tank from the resin cabinet. 3. Clean any residual resin from the outside of the tank with blue towels and IPA. 4. Unscrew the straw assembly cap. 5. Lift the straw assembly to expose the screw threads on the resin tank. 6. Clean the screw threads with blue towels only. - Do not use any solvents as this may contaminate the resin and may affect part quality. 7. Screw the straw assembly cap back onto the resin tank. 8. Place the resin tank back onto the shelf in the resin cabinet. 9. Reconnect the quick release connector to the quick release nozzle.