Sunday, June 24, 2018

Wheel Hub Bearing, Car Rear Wheel, How to Remove


Wheel bearing for rear wheel of front wheel drive (FWD) cars nowadays are using wheel hub bearing. This type of bearing has tire hub attached. This bearing is also referred to as wheel hub assembly (WHA), hub assembly, wheel hub unit, wheel bearing hub, sometimes shortened as hub assy.



If it has been used for a long time then the wheel bearing will make a humming sound, sometimes even a rumbling sound, it can be heard clearly at high speed. Also read the bearing sound test.

To remove this car wheel bearing is quite easy with just common tools such as: car jack, wheel wrench, slot head screwdriver, small crowbar, hammer, 12 mm open end or ring spanner or socket 12 mm, 30 mm socket wrench, and hardened nail.

The 30 mm socket wrench is used to turn the spindle nut. A socket with 3/4 inch handle is better. Prepare also extension pipe for socket handle, because possibility that the spindle nut is stuck when it will be loosened. If using a socket with a 1/2 inch handle, the handle can be broken if the nut is stuck.

CAUTION: hand brake is not activated during repair, in order to remove the brake drum. Apply wheel chocks to other wheels to ensure the vehicle does not move, before jacking up and releasing the wheel. Once jacked up, the car body should be supported by a jack stand to ensure stability, or support the car body with spare tire and wooden beams.

Steps of removing wheel hub bearing can be seen on the following YouTube video.



Those steps in the video are also described as follows:


As the photo above, remove the nut cap by using a slot screwdriver, can also be done by a small crowbar.


Undo notch on the nut by using hardened nail. The nail is struck by a hammer. If using center punch instead of nail, make sure the center punch end is sharp.

Put back wheel lug nuts to wheel stud bolts before hammering, as a precaution to protect wheel stud bolts if the hammer is misdirected. If the wheel stud bolts are hit and bent, it will be difficult to remove the brake drum. If the wheel stud bolt thread is damaged by the hammer, then the work can not be postponed because the wheel can not be re-installed.


In the photo above it appears the notch on the spindle nut has been undone, it is pointed by a red arrow.


Using a bolt, brake drum is pushed out from the hub to release it. For this car, bolt is a 12 mm bolt or M8 thread. Seen in the photo above the bolt hole is designated with a red arrow.


When the 12 mm bolt is turned clockwise, the bolt will enter and the brake drum will be pushed out and released from wheel hub. Note that all wheel nuts are removed when 12 mm bolt is turned. If the brake drum is stuck, hit the drum with a hammer to tear down rust and dirt that makes drum jammed.


Use the socket wrench with 3/4 inches handle to loosen the spindle nut. In this case, it is using 30 mm socket size. If the nut is stuck, use an extension pipe to lengthen the handle to get the leverage effect.


After the nut is removed, wheel hub assembly usually can be easily pulled off by hand, no need to be pulled with a tracker puller

The example above is for the left rear wheel of Honda City 2004. But with a little adjustment can also be applied to other cars that use wheel hub bearing.


Saturday, June 23, 2018

Bearing Roda Belakang Mobil, Cara Melepaskan


Bearing atau bantalan roda belakang mobil berpenggerak roda depan (front wheel drive, FWD) saat ini menggunakan tipe bantalan yang digabung dengan hub roda atau tempat baut roda (tire hub). Bantalan jenis ini disebut juga sebagai wheel hub assembly (WHA), hub assembly, wheel hub unit, wheel hub bearing, wheel bearing hub, kadang disingkat hub assy.


Jika sudah lama dipakai maka bantalan roda akan mengeluarkan suara dengung, bahkan terkadang gemuruh yang terdengar jelas pada kecepatan tinggi. Baca juga test suara bearing.

Untuk melepasnya cukup mudah dengan hanya peralatan umum seperti: dongkrak, kunci roda, obeng minus (-), linggis kecil, palu, kunci pas atau ring 12 mm, bisa juga kunci socket 12 mm, kunci socket 30 mm, dan paku beton.

Kunci socket 30 mm digunakan untuk memutar mur as roda. Sebaiknya menggunakan socket dengan gagang 3/4 inchi. Persiapkan juga pipa untuk extension (perpanjangan) gagang socket, karena ada kemungkinan mur as roda macet saat akan dikendurkan. Jika menggunakan socket dengan gagang 1/2 inchi, gagang bisa patah jika mur macet.

Klik di sini untuk membaca artikel cara pemasangan bearing WHA.

PERHATIAN: rem tangan tidak diaktifkan selama perbaikan berlangsung, agar tromol bisa dilepas. Ganjal roda lainnya dengan baik agar kendaraan tidak bergerak, sebelum mendongkrak dan melepaskan roda. Setelah didongkrak, sebaiknya bodi mobil ditahan dengan jack stand agar lebih stabil, atau ganjal bodi mobil dengan ban serap dan balok kayu.

Tahapan melepaskan wheel bearing hub dapat dilihat pada video YouTube berikut.

 
 
Tahapan pada video tersebut juga dijelaskan sebagaimana berikut ini.



Sebagaimana foto di atas, lepaskan tutup mur as dengan menggunakan obeng minus (-), bisa juga menggunakan linggis kecil.


Bongkar takik pada mur as dengan menggunakan paku beton / paku baja. Paku tersebut dipukul dengan palu. Jika menggunakan center punch menggantikan paku beton, pastikan ujung center punch tajam.

Pasang kembali mur roda sebelum membongkar takik, sebagai upaya pengamanan guna melindungi baut-baut roda jika palu salah sasaran. Jika baut roda terpukul dan bengkok maka akan sulit melepas tromol rem. Jika ulir baut roda rusak terpukul palu, maka pekerjaan tidak bisa ditunda karena roda tidak bisa dipasang kembali.


Pada foto di atas tampak takik pada mur as roda sudah dibongkar, ditunjukkan oleh panah merah.
 
 
Dengan menggunakan baut, tromol rem didorong lepas dari dari hub hingga terlepas. Pada mobil ini baut tersebut adalah baut 12 mm atau ulir M8. Terlihat pada foto di atas lubang baut ditunjuk dengan panah merah.


Pada foto di atas tampak baut 12 mm diputar ke kanan dengan kunci socket dengan ratchet handle, maka baut akan masuk dan tromol akan terdorong keluar dan terlepas dari hub. Perhatikan bahwa semua mur roda sudah dilepas saat baut 12 mm diputar. Jika tromol macet tidak mau bergerak keluar, pukul tromol dengan palu sehingga merontokkan karat dan kotoran yang membuat macet.


Gunakan kunci socket dengan gagang 3/4 inci untuk membuka mur as roda. Pada contoh ini digunakan socket berukuran 30 mm. Jika mur macet, gunakan pipa untuk memanjangkan gagang agar didapat efek pengungkit.


Setelah mur dilepas, biasanya wheel hub assembly dapat dengan mudah ditarik lepas dengan tangan, tidak perlu ditarik dengan tracker puller.

Contoh di atas adalah untuk roda belakang kiri dari Honda City 2004. Tapi dengan sedikit penyesuaian dapat juga diterapkan pada mobil lain yang menggunakan bantalan roda jenis wheel bearing hub.




Sunday, June 10, 2018

Airport Bus Cinere To Soekarno-Hatta Cengkareng


Starting Tuesday June 5th, 2018 has been available bus service transportation from Cinere Bellevue to Soekarno Hatta International Airport (SHIA) or Soetta at Cengkareng (CGK) and vice versa. In the photo above, a bus standby at the front yard of Cinere Bellevue mall. While in below photo, a bus is ready to go at the mall terrace. It seems that it is prepared in order to start to transport travelers for Eid Ul Fitr (Eid Mubarak) 2018.


In the afternoon when traffic is not too busy, Cinere to Soetta airport route can be traveled in 1.5 hours. But during peak hours in the morning and evening, travel time can be up to 2.5 hours.

The buses timetable from Cinere are available at 02:30 up to 19:30, leaving every 1 hour. From Soekarno-Hatta airport buses are available from 05:00 until 23:00, also depart every 1 hour.

As of 11-Nov-2019, update info from reader: the bus operator has a WhatsApp (WA) number 081315333399.

From Cinere Bellevue at night there are additional schedules to leave at 20:30 and 21:30 the last one at night.


As the above photo, the bus air conditioned interior has comfortable seat, WiFi, and phone charger or USB charger outlet. This is a best bus standard.

The current bus ticket fare is Rp 50.000,- per passenger for one way, the ticket can be purchased at the counter at Bellevue terrace or purchased via the conductor at bus. For now only cash payment is accepted, no payment by card.

Bus departs from Cinere Bellevue to Punak street and Pangkalan Jati golf course, through Pondok Labu market, and continue to Fatmawati road.

From the Cinere to the airport, the bus can only stop once at in front of the police post at the corner of Fatmawati road and RA Kartini road. This is a check point, and the bus may pick up passengers here. Then the bus will go to the Jakarta Outer Ring Road (JORR) highway and continue to the airport toll road (Professor Sedyatmo highway).



The map above shows the bus stop pointed by red arrow, before the bus goes in to the highway. This bus stop is close to Fatmawati train station of MRT Lebak Bulus - Hotel Indonesia roundabout.

For the route from the Soetta airport to Cinere, bus exit JORR toll road before Fatmawati intersection. Bus passes in front of Cilandak Town Square (Citos), then turns and passes in front of High Scope Indonesia School, then goes to Fatmawati road.

From the airport, the bus may stop in front of Fatmawati hospital. There are several star hotels and accomodation around Fatmawati hospital, including: Mercure Jakarta Simatupang (4-star hotel), Swiss-Belinn Hotel TB Simatupang Jakarta (3-star hotel),  Grand Whiz Poins Square Jakarta (4-star hotel). Kristal Hotel (4-star hotel), Park 5 Cilandak (3-star hotel), Midtown Residence Jakarta,  RedDoorz Plus near RS Fatmawati 2, Airy Syariah Cilandak KH Muhasyim Raya 50, Griya Lebak Bulus, and others.

Bus can also stop in front of One Belpark Mall or OBP at Pondok Labu. There is Cozy Apartment at Aspen nearby.

Then the bus goes to Cinere Bellevue Mall as the last stop. There is 2 BR Cinere Bellevue Suites Apartment nearby, often called Bellevue Apartments.


This bus is marked with CINERE inscription on the left side window glass, making it easy to be known while waiting for the bus at the airport. The bus is operated by Hiba Utama.

Read also Damri bus schedules and routes from and to Soekarno-Hatta (Soetta) airport at busbandara.com. Damri buses connect Soetta airport to : Bandara (airport) Halim Perdanakusumah, Bekasi Timur, Bogor, Cibinong, Cikarang Jababeka, Karawang, Kemayoran, Mangga Dua Square, Pulo Gadung – Kota Harapan Indah, Purwakarta, Serang – Cilegon – Merak, Stasiun Gambir, Summarecon Bekasi, Supermal Karawaci, Terminal Blok M, Terminal Kampung Rambutan, Terminal Kayuringin (Bekasi Barat), Terminal Lebak Bulus, Terminal Pasar Minggu, Terminal Pulo Gebang, Terminal Rawamangun, Terminal Tanjung Priok, Thamrin City, WTC Serpong.


Friday, June 8, 2018

Bus Cinere Ke Bandara Soekarno-Hatta Cengkareng



Mulai hari Selasa 5-Juni-2018 telah tersedia layanan transportasi bus dari Cinere Bellevue menuju bandar udara Soekarno-Hatta (SHIA, Soekarno-Hatta International Airport) di Cengkareng (CGK) dan sebaliknya. Sepertinya memang disiapkan agar dapat membantu mudik lebaran mulai Idul Fitri 2018 ini. Pada foto di atas tampak bus siap berangkat di teras Cinere Belleveu mall. Sedangkan pada foto di bawah, adalah bus lainnya yang sedang istirahat di halaman depan mall. English version click here.


Di siang hari saat lalu lintas ramai lancar, rute Cinere ke bandara Soetta ini dapat ditempuh selama 1,5 jam. Tapi di saat jam sibuk seperti pagi dan sore hari, maka waktu tempuh bisa mencapai 2,5 jam.

Jadwal bus dari Cinere tersedia mulai jam 02:30 pagi sampai jam 19:30 malam, berangkat setiap 1 jam sekali. Dari bandara Soekarno-Hatta bus tersedia mulai jam 05:00 sampai jam 23:00, juga berangkat setiap 1 jam sekali.

Per 11-Nov-2019, info terbaru dari pembaca: operator busnya ada nomor WhatsApp (WA) 081315333399.

Dari Cinere Bellevue malam ada tambahan jadwal berangkat jam 20:30 dan 21:30 paling malam.



Tampak di foto di atas, dengan interior ber-AC bus memiliki kursi yang nyaman, WiFi, dan pengisi daya telepon (phone charger) atau stopkontak pengisi daya USB (USB charger outlet). Ini adalah standar bus terbaik.

Ongkos ticket bus saat ini adalah Rp 50.000,-  per penumpang untuk sekali jalan, ticket dapat dibeli di loket di teras Bellevue atau dibeli di kondektur di atas bus. Untuk sementara ini hanya menerima pembayaran cash, tidak bisa pakai kartu.




Bus Udara Transportasi Masa Depan saran solusi transportasi Jakarta, Bogor, Depok, Bekasi, Tanggerang, yang cepat, bebas macet dan banjir. Helikopter sebagai taxi udara sudah banyak diterapkan di kota-kota besar, tapi ongkosnya mahal. Helikopter Mil Mi 26 daya angkut 90 penumpang membuat ongkos ticketnya jadi terjangkau. Harga sewa per jam dibagi jumlah penumpang per jam maka didapat estimasi ticket Rp 200.000 Bogor-Jakarta, Rp 100.000 Depok-Jakarta.


Bus bandara ini berangkat dari Cinere Bellevue menuju jalan Punak dan melewati lapangan golf Pangkalan Jati, lewat pasar Pondok Labu, dan terus ke jalan Fatmawati.

Dari arah Cinere menuju bandara, bus hanya boleh berhenti satu kali yaitu di depan pos polisi di tikungan jalan Fatmawati menuju jalan RA Kartini. Titik ini adalah check point, dan bus boleh menaikkan penumpang di sini. Selanjutnya bus akan masuk ke jalan tol Jakarta Outer Ring Road (JORR) atau jalan tol Lingkar Luar dan menuju jalan tol bandara Profesor Sedyatmo.


Peta di atas menunjukkan dengan panah merah titik bus berhenti, sebelum bus masuk ke jalan tol. Bus stop ini dekat dengan stasiun Fatmawati untuk kereta MRT Lebak Bulus - Bunderan Hotel Indonesia.

Baca juga bus Transjakarta Pondok Labu ke Blok M lewat jalan Fatmawati.

Untuk rute dari bandara menuju Cinere, bus keluar tol JORR sebelum perempatan Fatmawati. Bus lewat di depan Cilandak Town Square (Citos), lalu memutar dan lewat di depan High Scope Indonesia School, selanjutnya menuju ke jalan Fatmawati.

Dari bandara, bus boleh berhenti di depan rumah sakit Fatmawati. Ada beberapa hotel dan penginapan di sekitar rumah sakit Fatmawati, di antaranya: Mercure Jakarta Simatupang (4-star hotel), Swiss-Belinn Hotel TB Simatupang Jakarta (3-star hotel),  Grand Whiz Poins Square Jakarta (4-star hotel). Kristal Hotel (4-star hotel), Park 5 Cilandak (3-star hotel), Midtown Residence Jakarta,  RedDoorz Plus near RS Fatmawati 2, Airy Syariah Cilandak KH Muhasyim Raya 50, Griya Lebak Bulus, dan lain-lain.

Bus juga boleh berhenti di depan One Belpark Mall Pondok Labu atau OBP. Di dekat sini ada Cozy Apartment at Aspen.

Selanjutnya bus menuju Cinere Bellevue Mall sebagai penghentian terakhir. Di sini terdapat 2 BR Cinere Bellevue Suites Apartment sering disebut juga Bellevue Apartments.



Bus ini ditandai dengan tulisan CINERE pada kaca jendela samping kiri, sehingga mudah diketahui saat menunggu bus di bandara. Bus dioperasikan oleh Hiba Utama.

Baca juga jadwal dan rute bus Damri bandara dari dan ke Soekarno Hatta (Soetta) di busbandara.com. Bus Damri menghubungkan bandara Soetta ke : Bandara Halim Perdanakusumah, Bekasi Timur, Bogor, Cibinong, Cikarang Jababeka, Karawang, Kemayoran, Mangga Dua Square, Pulo Gadung – Kota Harapan Indah, Purwakarta, Serang – Cilegon – Merak, Stasiun Gambir, Summarecon Bekasi, Supermal Karawaci, Terminal Blok M, Terminal Kampung Rambutan, Terminal Kayuringin (Bekasi Barat), Terminal Lebak Bulus, Terminal Pasar Minggu, Terminal Pulo Gebang, Terminal Rawamangun, Terminal Tanjung Priok, Thamrin City, WTC Serpong.

Transportasi murah dan cepat dari Jakarta ke Bogor via kereta rel listrik (KRL).

Lihat video pemandangan yang indah saat naik kereta Mass Rapid Transit (MRT) rute Lebak Bulus sampai Bunderan Hotel Indonesia Jakarta. Foto di bawah memperlihatkan kereta MRT saat tiba di stasiun Lebak Bulus.



Baca juga uji coba publik Light Rail Transit RLT Jakarta Kelapa Gading - Rawamangun.





Tuesday, June 5, 2018

Polystyrene Paper Helicopter Science Toy Fly Further



The simple polystyrene propeller helicopter discussed in the previous article will be added paper at the tip of the blades. The goal is to make it flies further. The photo above shows red painted paper on blade tips.

The paper used is a drawing paper that is usually A3 size, it can also use other paper with relatively same thickness or weight.

The following video shows a helicopter with the red tip propeller flying farther than a simple helicopter.


In the following slow motion video, it can be seen clearly that the helicopter is flying stable and landing smoothly. The propeller still spins a few moments after landing on the floor. It looks like a real helicopter.


For comparison, the video below shows a simple polystyrene or styrofoam helicopter without red paper when flown.


The following video shows the procedure for making and installing paper on the tip of the helicopter blades.



The explanation of the procedure can also be read as follows:


Prepare a piece of thick paper. Used paper is no problem, because only small size is required. Draw two rectangles with below sizes:
20 x 30 mm and 18 x 30 mm.

The two rectangles are unified. as the photo above, so the unified size of rectangle is:
(20 + 18) x 30 mm = 38 x 30 mm.

Total 4 unified rectangles are needed, corresponding to the tip of propeller blades.


Cut along the 20 + 18 mm line, and 30 mm line.


Fold the cut paper on the center line separating the 20 mm and 18 mm sections.


Fold the 20 mm section symmetry by uniting its end with the line separating 20 mm and 18 mm sections.


By uniting two ends of paper, then the paper will be folded to form wing (airfoil). As the photograph above, the cross section of paper forming a triangle, about similar to the shape of a wing.


Glue two ends of paper with adhesive tape. Make sure the two ends of the paper are tight, as shown in the photo above.


Mark 40 mm distance from the center point of the polystyrene propeller toward blade tips.


Fit the paper airfoil to blade tip, up to the 40 mm mark from blade center point.


Fit paper airfoil on to all four blade tips. To keep the propeller steady and smooth rotation, make sure all papers have the same shape, and the same distance from the center. Then this helicopter propeller  is ready to be flown.

Paper airfoil can be painted to make it more attractive. As in the very top photo, the paper are painted in red make it visible to the video camera.