[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-399809-105":59,"doc-detail-399809-en":131},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":124,"head_meta":126,"extra_data":128,"updated_unix":130},105,"en","pa-28-tips-fuel-primer-brakes-maintenance","PA-28 Tips - Fuel Primer, Brakes & Maintenance","","Practical maintenance tips for the PA-28 aircraft, focused on troubleshooting and rebuilding key systems. Guidance covers replacing specific O-rings for the fuel primer, using silicone lubrication, and a faster method to bleed brakes for toe-brake configurations without reintroducing air. Additional procedures explain a one-person brake bleeding approach, installing retractable shoulder harnesses with the necessary structural support, removing the master switch cluster, and addressing bouncing or noisy tachometers by inspecting and repacking the tach cable with appropriate grease.",{"@graph":69,"@context":123},[70,84,106],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":35,"@type":76,"position":81},"https://docshare.wps.com/document/healthcare/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/pa-28-tips-fuel-primer-brakes-maintenance/399809/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/pa-28-tips-fuel-primer-brakes-maintenance/399809.png","ImageObject",300,407,{"name":92,"@type":93},"Finn","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-05","2026-09-27",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",11,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"Which O-rings are required for the fuel primer, and what lubrication is recommended?","Question",{"text":113,"@type":114},"The notes state that two O-rings are required with number MS29513-012. A small amount of Dow Corning silicone lube is recommended for lubrication.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"What is the FAST method for bleeding brakes with toe brakes?",{"text":118,"@type":114},"Slightly loosen the hose fitting at the top of the toe brake cylinder, slowly pull the hand brake handle until bubbling appears around the fitting, then release and slowly depress the toe brake until no bubbles remain. Tighten the fitting without releasing toe pressure to prevent air from re-entering.",{"name":120,"@type":111,"acceptedAnswer":121},"How can bouncing tachometers be addressed?",{"text":122,"@type":114},"For tachs that bounce, slip the inner cable out as described, clean the cable and casing, then repack with soft molybdenum grease. The grease is used to improve smoothness and damp cable-induced movement.","https://schema.org",{"og:url":83,"og:type":125,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":127,"canonical":83},"index,follow",{"doc_id":129,"site_id":62},399809,1790694807,{"code":4,"msg":5,"data":132},{"doc_id":129,"user_id":133,"nickname":92,"user_avatar":134,"doc_module":4,"category_id":34,"category_name":35,"doc_title":65,"doc_description":67,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":140,"language":141,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":142,"faqs":143,"seo_title":144,"seo_description":67,"update_tm":145,"read_time":146,"preview_page_count":4},34359740700684,"https://ap-avatar.wpscdn.com/avatar/1f400023980c374ae676?_k=1777273430885731487","Primer O-Rings  \nAccording to my notes from a previous post, there are 2 o-rings required, MS29513-012 .  \nRebuilding Primer  \nI recently had a problem with my fuel primer not working ...to make a long story short I found out that it was the o-rings on the fuel primer knob.  \nI located the right ones the number is MS29513-012 you will need two of them and they are kinda expensive at a dollar apiece but man I did not know that my fuel primer was suppose to work that well. Lubrication: A little Dow Corning silicone lube is fine. Impervious to almost anything and doesn't contaminate.  \nBleeding Brakes  \nAfter I spent the better part of a day trying to bleed my brakes using the gravity and pressure methods, my A/P showed me the FAST way.  \nFor those with toe brakes...  \nSLIGHTLY loosen the 9/16\" hose fitting that goes to the blue AN fitting at the top of your toe brake cylinder. SLOWLY pull the hand brake handle until you get a little bubbling around the fitting. When the bubbling stops and you get straight fluid, release the handle. Then, SLOWLY depress the toe brake until you get no bubbles, just fluid. WITHOUT releasing pressure on the toe brake, tighten the fitting. (if you release the pedal before tightening the fitting, you let air back in) Voila! No air, firm brakes. Paper towels or shop rags will keep the fluid off your interior. The key is slow and easy pressure, or you'll have red fluid all over. Don't forget to check your reservoir level. Took about 2 minutes to do each side.  \nBrake bleeding brakes  \nI've tried just about every method and have found the following works best for me, and it only requires 1 person.  \n-put clear plastic tubing on the bleed valves of each main brake wheel cylinder  \n-put other ends of these tubes in the brake fluid reservoir, draping the hose up over the top of the engine cowling so you will be able to see the tube content from pilot's seat  \n-make sure the reservoir is near full  \n-crack open both wheel cyl bleed values  \n-climb in and begin pumping each toe brake while watching the content of the tubing for fluid.  \n-While pumping you will see fluid with air bubbles move toward the reservoir. Of course, when they reach the reservoir they will float to the top and into the surrounding air.  \n-periodically pump the hand brake also  \n-after a while jump out and add fluid to the reservoir  \n-jump back in and continue pumping toe brakes and hand brake until no more bubbles are seen in tubing.  \n-jump out and close both wheel cyl bleed valves.  \nShoulder harnesses  \nA while back I put Piper retractable shoulder belts in my 1965 180C. I got the complete kit from Wentworth for about $600. Doublers had to be intalled in the roof behind the front seats for theretractor hardwhare. When finished it was exactly like original equipment for the later model cherokees. The installation took about 8 hours. Paper work required about 3-4 hours of hastle for my AI. get the paper work for Inertia Safety Shoulder Belt Intallation Kit \\# 764 981V and file the appropriate 337--you need to find an AI who knows what he is doing.  \nThe shoulder belts look great and work fine without restricting movement  \n...and...  \nI just received two retractable shoulder harness kits from Kosola for the front seats of my 180. They were $710 each. I think the non-retractables were $480 each. I was told the install time should be 4 to 6 hours per side.  \nKolola Shoulder Harness  \nI installed the Kosola shoulder harness for the front seats of our '65 140 last month. It's fairly labor-intensive but the results are good. The installation is similar to Piper's factory setup, with a skin doubler and support structure riveted into place above the rear window, and the inertia reel mounted to the new structure. Parts kit was around $700/seat including inertia reel, new lap belts, STC and drawings. They also sell a kit with adjustable strap and no inertia reel for a couple hundred $ less.  \nRemoving Master Switch  \nYou have to remove the co","cbCaik56VCkMKLsr","https://ap.wps.com/l/cbCaik56VCkMKLsr","pdf",198829,33,"English","# Fuel primer O-rings and lubrication\n# Bleeding brakes (toe brakes and one-person method)\n# Shoulder harnesses installation\n# Removing the master switch cluster\n# Fixing bouncing tachometers (cable inspection and lubrication)","[{\"question\":\"Which O-rings are required for the fuel primer, and what lubrication is recommended?\",\"answer\":\"The notes state that two O-rings are required with number MS29513-012. A small amount of Dow Corning silicone lube is recommended for lubrication.\"},{\"question\":\"What is the FAST method for bleeding brakes with toe brakes?\",\"answer\":\"Slightly loosen the hose fitting at the top of the toe brake cylinder, slowly pull the hand brake handle until bubbling appears around the fitting, then release and slowly depress the toe brake until no bubbles remain. Tighten the fitting without releasing toe pressure to prevent air from re-entering.\"},{\"question\":\"How can bouncing tachometers be addressed?\",\"answer\":\"For tachs that bounce, slip the inner cable out as described, clean the cable and casing, then repack with soft molybdenum grease. The grease is used to improve smoothness and damp cable-induced movement.\"}]","PA-28 Tips - Fuel Primer, Brakes & Maintenance | PDF",1790502974,83]