Others call for caliper assembly paste. $ Brake caliper mounting bolt: 39 N.m (3.9 kgf.m, 28 lb-ft) Brake hose union bolt: 23 N.m (2.3 kgf.m, 16.5 lb-ft) For assembly procedure of brake hose: "9-18 Install the guide hook A. Detach the brake hose from the caliper. How often should you re-apply to pressure washer rubber o-rings (and proper technique)? The piston moves in the bore (and seal) when the brake is applied. Notes: Use only brake assembly lubricant designed for caliper pistons and rubber components. Smear inside of the caliper with grease. Figure A - Left caliper complete showing parking brake actuator lever. Old versus new: A 1974 Norton Commando 850 disc brake caliper stripped bare with old parts on left, new on right. ?i{_|hx._~quk a0y/{tt[MXOC;1:{w`Zy-=rJ8J{nhYUxxj|u};`Gua0Fz>w\c[&XC.SZAvuy,G'c?]6#]M%zP>GFX$3@7:Jy:My`]TU_t3e=0)vZ6k,PSO;k_/'>*oB^{E^y1!JLSW[A^r/sQg>^;w$HI\Ur[^kO$*I4dRT>Jj !L$8*iE[+DSIq2h)4 r(Z[bd*Vj]wen[pB k.|HUoPF%FYCf#MPRhS1*.uD@-8eC=(.8u$2>qx{gAFCqTz2w0S.JyaZd7'Wdr*BCrhS`q'bhmaCt2BpXQ6y ZK|t- IFcVU-TDglXs5D \Lwd)z80|0a . o="W$8?`+1L,u,ZCF >!K~Dz*W&1U During caliper reassembly, all old rubber parts should be. Tech B c. Both A and B d. Use a brake parts cleaner to clean the caliper pistons and bores. 10. In my 30 years of wrenching the 11 BMW's I've owned, I've never had a factory caliper pin fail or corrode, and I assemble w/o lube. endstream endobj 318 0 obj <>/Metadata 64 0 R/Pages 315 0 R/StructTreeRoot 123 0 R/Threads 348 0 R/Type/Catalog>> endobj 319 0 obj <>/MediaBox[0 0 612 792]/Parent 315 0 R/Resources<>/ProcSet[/PDF/Text/ImageC]/XObject<>>>/Rotate 0/StructParents 0/Tabs/S/Type/Page>> endobj 320 0 obj <>stream Off with the cover, and the engine turns over willingly, thank goodness. Worn, damaged, or brittle neoprene parts should be replaced, as should the cylinder, if it is pitted. These parts are susceptible to drying and cracking, which can lead to leaking and seized brackets. Fig. I have broken my units down to allow me to paint mine with G2 and then bake them in the oven @ about 150* for 30 min. Cut the tubes to the correct length after bending them to fit the car. pain between 4th and 5th metatarsal. You limp the few blocks home at low speed. Banjo fittings can be installed last. Torque the caliper bolts to the torque specified in the repair manual for your car and tighten the brake hose(s). fH.G0 lB Step 7: Fit the wheel, tighten the lug nuts and go for a test drive to ensure all is well. And that scotches your plan for traveling to tomorrow afternoon's car show. Mitutoyo makes quite a few different versions for all their caliper models past and present. After . Now, disconnect the sway bar drop link from the wheel bearing carrier (see Figure 2). Each package contains two guide bushings, two caps, and an extra cap with a white retaining clip for another application. 2) Remove nut from rear arm to differential housing bolt and while rocking differential, remove bolt. 1. Lube the caliper bore and piston seal with a little brake fluid on your finger. A grinding sqealing noise when brakes are applied indicates, On most vehicles, the pressure differential valve, Technician A says theat the parking brake should be engaged while installing and adjustingdrum brake components. When the diameter does not satisfy the specified value, replace the snap ring with new one. WARNING: Keep fingers clear during this step. caliper to the caliper bracket. c. Using vernier calipers, measure the inside diameter. Home; Uncategorized; sky subscribers services ltd direct debit; sky subscribers services ltd direct debit. 6. Cut the tubes to the correct length after bending them to fit the car. With the brake line inlet port held over a container to catch fluid, press the pistons until they are retracted fully. Ive read that caliper paste is essentially just silicone. Drain fluid from calipers. It is compatible with all rubber compounds including nitrile, teflon, nylon and other synthetic rubbers. 4, Fatai Idowu Arobieke Street, Pump the brake pedal with the bleeders open and the ABS unit on to completely drain the system. 1. Your scale will likely have a hook on the end, put the hook in the hole that was attached to the tie rod & note the lbs. Loaded calipers are even better because they give you everything you need in one box, and theres much less chance of mismatched parts. Worn, damaged, or brittle neoprene parts should be replaced, as should the cylinder, if it is pitted. 2. Use a tire iron or a ratchet to loosen the lug nuts holding the wheel in place. The rear caliper can be machined to accept a 38mm or even a 40mm piston and sleeve. With the caliper apart, check the neoprene seals and O-rings, and the bore of the cylinder. The slides and abutment clips should be cleaned and/or replaced. Its just something Im considering here as I read that About the sticking of the seals. Pic 3 are the first items removed from the hub carrier bolt removal (washer and rubber bushing). Drain all the brake fluid from the car. Tel: Not cleaning the brake slides and hardware: Just slapping new pads where the old pads once resided never works. First loosen the lug nuts, block the rear wheels and get the car up on jackstands. No wonder pro mechanics rarely bother to rebuild calipers anymore. $ Brake caliper mounting bolt: 39 N.m (3.9 kgf.m, 28 lb-ft) Brake hose union bolt: 23 N.m (2.3 kgf.m, 16.5 lb-ft) For assembly procedure of brake hose: "9-18 Install the guide hook A. Ir para o contedo. All you need to do is install the caliper, bleed it, and you're back on the road in a few minutes. I suppose rebuilding brakes and reassembly as quick as possible is always better. Obviously, pad/rotor replacement is the best time to also replace calipers. Use the screwdriver to remove the rubber seals. Watch for possible reservoir overflow. Hearst Magazine Media, Inc. All Rights Reserved. Since the calipers main casting is rarely damaged, the remanufacturer cleans the caliper and installs a new piston, piston o-ring and exterior seal. Record the number of shims used for proper reassembly. The grease is not only safe for use on rubber parts (won't cause them to swell over time, which would be bad for the caliper pins), but also lubricates well (very good for caliper pins). Install the new brake pads with supplied shims/anti-squeal compound, and mount the caliper on the car again. rebuilding caliper assembly. Best to replace the bushings every three brake jobs or I was taught by a mechanic and by multiple family member to never use anything but brake fluid on wheel cylinders when assembling, cleaning or honing them. If the boot is torn you will at the least need to rebuild the caliper. Some two-piston calipers may have internal rubber seals--so no hydrocarbon solvents, please. Small bits of krap thats been sitting in the caliper, flex lines. beatles i think we're alone now. A standard object, defined as having a mass of exactly 8.86kg8.86\, \mathrm{kg}8.86kg, is given an acceleration of 2.27ms22.27\, \mathrm{\frac{m}{s^{2}}}2.27s2m. Lekki Phase 1 ,Lagos, They are measuring tools, and they come in a variety of shapes and have different specifications to perform their role accordingly. Add new brake fluid to bring the level up to the MAX mark, if necessary, and replace the reservoir cap. Your brake system relies on a number of moving parts to achieve consistent, safe braking. A race caliper spreader tool, like the Girodisc unit shown below, can make short work of this by compressing all pistons simultaneously. These parts are susceptible to drying and cracking, which can lead to leaking and seized brackets. I've used Bevel Heaven for Brembo parts in the past. Pull the pads, remove the calipers and drain the remaining fluid from each caliper into a jar. If you're interested in a longer-lasting pad material, look into a premium metallic or ceramic lining. While I had the rest of the suspension apart I figured I may as well replace the 20 year old rubber anti roll bar bushes with something a little better. Rebuild kits usually include a new piston, but if you're gleaning from generic parts, you may be stuck, literally. The loan was repaid in 2 years through quarterly payments that increased by$50,000 each time. Aug 4, 2013. Rebuilding a difficult-to-find brake caliper might be your only solution to getting that classic car out on the road again. . We combine shipping on multiple items- Please wait for a invoice before paying if you purchase multiple items. during caliper reassembly all old rubber parts should be 12. Unhook the handbrake cable from the lever. Figure C - Remove one slider pin, under cap, with 10mm wrench. B. cleaned with brake cleaning solvent. Send us your question and we'll respond within 24 hours. Easy check is to see if the master cylinder cap gasket looks funny, as the rubber gasket will swell up, as does all of the brake parts. Indeed, we picked up a rebuilt caliper for this story at the local NAPA store. Bleed brake system to relieve any air in the system. STEP 5: REASSEMBLY Time to put the caliper back together. Answer (1 of 13): Wear parts like the pads, etc. But a clutch assembly for heavy lawn and garden use consist of a heavy duty 3- or 6-pin drive plate, either high strength steel or stainless steel driveshaft, either a single aftermarket, We carry out services of marine and offshore support services, civil engineering and maintenance works in the oil and gas industry as well as market petroleum products. Drip oil can also be used with an applicator brush or you can dip the part in a cup of the oil. the cleanest town in cameroon 2020do mcdonald's ranch need to be refrigerateddo mcdonald's ranch need to be refrigerated If you plan on changing your hydraulic filter after repairs, it is best to test everything first in case you have to tear it apart again to fix a leak. 1 Pc 34 - $8.99 . Thoroughly clean all parts before starting the assembly. Note: only 2 kits are necessary (1 for each rear caliper). Skills and Trades. The hose should fit snugly over the bleeder screw. yes, youd want to replace those in pairs. Pull the pads, remove the calipers and drain the remaining fluid from each caliper into a jar. Slide the seal into its groove in the bore and replace the piston until about half an inch sticks out. 12) Flipped the assembly upside down with the rotor resting on the 2 pieces of 2x4 as shown. Lube the caliper bore and piston seal with a little brake fluid on your finger. I will send you a invoice. 1)To install, reverse removal procedure; Removal; 1) Raise car and support under axle housing. That would not help you directly but it may simplify understanding of how things are supposed to work. Lubricate the caliper bore, seal, and piston well with brake fluid. Next, the bleeder screw should be loosened to allow old fluid to be flushed out of the caliper bore. Have Technician #2 slowly press and release the brake pedal 3 times. Pump the brake pedal with the bleeders open and the ABS unit on to completely drain the system. Do Mennonites Practice Polygamy, Insert the new pistons together with the new seals. Using 40psi blow a small blast of air into the caliper through the brake fluid inlet located on the back of the caliper; this will extend the pistons. Ditto when using a flare-nut wrench on the brake line. As a general rule, how often should brakes be checked?, Which of the following is not necessarily a reason to machine a Brake Drum?, Technician A says that a groove decreases the drum's diameter by twice the depth of the groove. Worn, damaged, or brittle neoprene parts should be replaced, as should the cylinder, if it is pitted. Fig. The screwdriver can easily prick the rubber seals and cause brake fluid to leak. Record the number of shims used for proper reassembly. If you notice smoking or an acrid burning smell coming from one wheel, you might want to check on the brakes. A piece that surrounds an instrument's dial and is used to index the dial. Inside the box with the like-new caliper assembly, you'll find fresh sliding pins and any other hardware that should be replaced--and sometimes, new pads as well. True or False? You would not replace brake pads in only one corner of the vehicle because the hydraulic force and the friction generated is not going to be the same side to side. The downside is that those polished rims--aside from the cost--will be covered in gray dust after a day's drive. Technician #2 should be sitting in the vehicle to pump the brakes. Since the caliper's main casting is rarely damaged, the remanufacturer cleans the caliper and installs a new piston, piston o-ring and exterior seal. We ship the day after payment is made. After painting, re-install the brake pads back into the caliper. Unlike the old school small- and big-block Chevy V8's, the Kohler K-series and Magnum engine block models K241, M10, K301, M12, K321, M14, K341 and M16 are not all the same. aberdare leader obituaries Facebook national merchants association lawsuit Instagram jerry moyes houseboat Whatsapp Use care during reassembly with the new o-rings and lubricate well. $140 Set of four stainless braided hoses. 1 - The kingpin bushings are located in the spindle only.. One package is needed per caliper. Technician #1 should be located at the caliper. Starting the conversion. NOTE: Before remounting the brake caliper, push the brake caliper pistons all the way into the caliper.! Grease any slider pins/rails with brake grease during the reassembly. who is right? Tech A states that finding replacement parts for a transmission can be a large undertaking considering all of the makes and models produced for the automotive market. The piston can now be pressed in completely. During disassembly, noticed the rear pads were nearly down to metal (hence the noise). You need to calculate the magnetic field at location 0.02,0.06,0\langle 0.02,0.06,0\rangle0.02,0.06,0 m due to the moving proton. Recommended caliper cleaning & lubrication procedure: 1 Use a wire brush or sand/bead blasting to remove rust from caliper brackets/guides to achieve a clean, smooth, uniform surface. Causes of a Sticking brake caliper. Autor do artigo Por ; Data do artigo pontoon rail speaker mount; penn common wolverhampton walks em how long do cyber crime investigations take em how long do cyber crime investigations take Country Tavern Ribs Recipe, Dialogue Between Politician And Journalist On Corruption, Rb+1 Is Isoelectronic With Which Noble Gas, Miaa Cross Country Championships Results 2021 Massachusetts. In most cases, the . You can find reassembly manuals for other vendors' calipers and use them as an inspiration material. Using 40psi blow a small blast of air into the caliper through the brake fluid inlet located on the back of the caliper; this will extend the pistons. Rusty Caliper Pistons & Piston Boot. Figure C - Remove one slider pin, under cap, with 10mm wrench. Can be quite a job to replace them without damaging the seals, or the piston/housing, so go easy with that screwdriver! Push the caliper pistons evenly into the caliper halves. These instructions were developed by disassembling and reassembling many calipers and are not perfect. Your brake system is not a good place to cut corners. port clinton high school athletics / roberto bettarini ambassador / roberto bettarini ambassador Add new brake fluid to bring the level up to the MAX mark, if necessary, and replace the reservoir cap. Small bits of krap thats been sitting in the caliper, flex lines. Hub and rotor assembly, caliper assembly, brake pad assembly. By . So after 13 hard years in the Northeast, the rubber parts on the brake calipers are looking rather sorry. Caliper replacement is required if a caliper is leaking brake fluid, if a piston is sticking, or the caliper is worn or damaged. 2. You will hear different arguments from every person . A. inspected. Once everything is clean, put it all back together. In some cases, a clogged bleeder screw must be removed for cleaning or replacement. The new floating brake pads pop into the caliper mounting plates. Q. Strip the caliper of the pads, shims, springs and sliders or pins. Replace as needed. If you are still not sure take the piston and caliper to a trusted mechanic. 386 0 obj <>stream Use a wire brush or sand/bead blasting to remove rust from caliper brackets/guides to achieve a clean, smooth, uniform surface. $ Brake caliper mounting bolt: 39 N.m (3.9 kgf.m, 28 lb-ft) Brake hose union bolt: 23 N.m (2.3 kgf.m, 16.5 lb-ft) For assembly procedure of brake hose: "9-18 Install the guide hook A. Insert the new pistons together with the new seals. Fig. Slide the dust seal over the piston and into its groove in the caliper. [2] If that's the case, repairs should be made before the new pads are installed. In the front trunk compartment, mark the location of the three nuts that hold the shock to the tower and then remove them (Figure 3). Then place your air hose with a small nozzle chuck attached over the line fitting on the back of the caliper. Select one: a. The "pill" and area around it and the adjustment gear also need some grease during reassembly. Pic 5 shows a set of cleaned-up parts arranged in the hub carrier bolt (they don't stay that way; just keep the parts together until reassembly). Solar Farm Maintenance Contracts, Step 6: Cut the cable tie and fit the caliper into the position and tighten using the two 12 mm nuts provided in the kit. 26 Front brakes looked to be ok. All the pads and rotors had been replaced at the same time at about 60,000 miles. Drain the fluid from the Lube the parts of the caliper adequately and using the right lubricant. brake pads continued. Consider replacing the steel or rubber brake lines if they are older than your dog. E. Brake reassembly All internal parts should be cleaned in new brake fluid. 8. This type of change is illustrative of A few days later the kits showed up and it was confirmed, not only was the seal included in the kit, but it was also the correct seal for use on the 88 Fiero. Do that step-by-step while reassembly the star adventurer (as shown in the video tutorial below). Obviously, pad/rotor replacement is the best time to also replace calipers. Drain fluid from calipers. THE. Two technicians are required for the following steps. Recheck and retighten all caliper and caliper mount bolts. Technician A says fluid will be visible on the face of the booster if fluid is leaking from its rear seal. I've had replacement pistons machined out of stainless-steel bar stock for oddball cars. 6. The loss of brake effectiveness due to heat created during prolonged hard braking. Now your Saturday morning drive has just mutated from a fun-filled jaunt into an afternoon's worth of work chasing down a replacement caliper. Best to replace the bushings every three brake jobs or When a brake caliper gets stuck in a clamped position, it generates an excessive amount of heat. Inside diameter: More than 167 mm (6.57 inch) NOTICE: Because the taper snap ring has the positioning direction, check it when installing. Most hydraulic brake calipers have only one or two moving parts. $ Brake caliper mounting bolt: 39 N.m (3.9 kgf.m, 28 lb-ft) Brake hose union bolt: 23 N.m (2.3 kgf.m, 16.5 lb-ft) For assembly procedure of brake hose: "9-18 Install the guide hook A. 3) Remove front rear arm attaching nut and bolt. Detach the brake hose from the caliper. CAUTION: No free play between brake shoe flanges and caliper fingers (Fig. whos correct? Now, hold it all together and note the relationship between the caliper, the piston and the plate. I11. You'll have to rebuild the caliper yourself. e. gene duplication. ohio e check requirements. Step 7: Fit the wheel, tighten the lug nuts and go for a test drive to ensure all is well. If its functioning, theres no need to replace it. These bolts have been replated, too, and will have to be torqued up correctly once the calipers are assembled on the fork legs. 1)To install, reverse removal procedure; Removal; 1) Raise car and support under axle housing. With the caliper apart, check the neoprene seals and O-rings, and the bore of the cylinder. Studies have shown a 30% loss of pad wear if the calipers are not rebuilt when the pads are worn out. The grease is under extreme heat and pressure so Your scale will likely have a hook on the end, put the hook in the hole that was attached to the tie rod & note the lbs. Using a screwdriver, install the snap ring. Page 180: Brake Caliper Reassembly And Remounting Apply brake fluid to all of the seals, brake caliper bores and pistons before reassembly. It is easier to break In the process of reassembly of the rear suspension I replaced all of the rubber bushings for anti-roll bar and also took apart all of the various bearings to clear out old grease, inspect and repack or replace. Tech B states that rebuilding a transmission often requires specialty tools that are specific to each transmission. Bring your old lines to an auto parts store and buy new tubing of the same diameter and longer in length. If it's stubborn and there's evidence of a caliper problem, such as dragging brakes or premature pad wear, a piston may be sticking in the bore. How many of you 328/308 owners have changed your rubber brake lines for stainless braided? Be sure you clean everything and replace all the rubber parts. cost of rabies vaccine at walgreens; pigeon forge tn daily news news break 14) Then the last step was just removing the rubber seal where the lever came out of and taking off the little O-ring that was around the back of the screw. Minor surface blemishes can be polished out with wet 2000-grit sandpaper, but any pits in the metal means replacement will be necessary. Youll also learn a little more about fixed, floating calipers and how they work. peloton knee position; knowledge center center parcs login. Pack the dust boot with grease. recommended to flush all parts out thoroughly before reassembly. Internal parts should be lubricated with brake fluid when installed. Then place your air hose with a small nozzle chuck attached over the line fitting on the back of the caliper. The rotor should fell toward the steering knuckle. Apply a little synthetic grease on the forward surfaces where the brake pads ride in the . Clean carefully. Posted by; Date June 12, 2022; Comments decomposition of h2so4 decomposition of h2so4 Use a tire iron or a ratchet to loosen the lug nuts holding the wheel in place. Replaced all pads and rotors, checked and greased the pins and bolts, plenty of clearance between rotor and caliper during reassembly. This concludes this section of the DIY. DESIGNED BY VIVID WEB SERVICES, during caliper reassembly all old rubber parts should be, how to turn off playback when recording fl studio, how to show numbers in millions in power bi. But you've gotten the bad news from at least a half-dozen countermen in the last hour--no rebuilt, or even new, calipers until the middle of next week. Serving you locally in NJ, NY, PA, MA, CT, RI, MD, DE, NH, MI, OH. Industry-wide, it's common practice to return used calipers to a central rebuilding station where the caliper assembly is rebuilt. There is no easy answer when it comes to choosing between industrial engineering or mechanical engineering. Repeat on the other side. Most brake calipers that fail get replaced with either a new part or a rebuilt one. admin on claws and paws; during caliper reassembly all old rubber parts should be. +234-701 347 2950 This . Select one: a. The new rotors and pads are thick and the caliper should give clearance for those parts.] Ensure utmost care during this part of the process. 2 - Here are all the old front-end parts: kingpins and retaining pins and bushings, axle pivot bushings, grease caps and shims.. b. Biffta - I am switching back because it appears the DOT 5 fluid has caused the caliper piston seal to swell a little. What is vr^?\vec{v} \times \hat{r}?vr^? Then start applying pressure back and forth to widen the gap while pushing the piston back into the caliper. Remove the caliper - part I. The jenny caliper is also known as the hermaphrodite or odd leg caliper is a unique instrument due to its features. Add the outer dust boot, and reinstall the freshly rebuilt caliper. #2. Unbolt the brake line from the caliper. Once the piston is squared up, it should slide in all the way with moderate finger pressure. (1) Remove the brake caliper and hang it from some convenient place with wire (like a coat hanger) to keep the rubber hose from being damaged. But a clutch assembly for heavy lawn and garden use consist of a heavy duty 3- or 6-pin drive plate, either high strength steel or stainless steel driveshaft, either a single aftermarket L~J. Disc brake calipers mount to fittings on the compatible bicycle frame and fork. At the end of the depression, the pedal should be held as if the brakes were applied. Apply hydraulic brake assembly lubricant to piston seals (8,9) and caliper pistons (3,4) to ease with reassembly and for protection. Remove the outer dust seal, too. Also, take note that we're talking about calipers here. Enter the email address you signed up with and we'll email you a reset link. When a brake caliper gets stuck in a clamped position, it generates an excessive amount of heat. Technician #2 should be sitting in the vehicle to pump the brakes. I was taught by a mechanic and by multiple family member to never use anything but brake fluid on wheel cylinders when assembling, cleaning or honing them. A quick warmup and you're off for a loop around town. Types of Clutch Assemblies - An ordinary clutch assembly for general lawn and garden use consist of a OEM quality steel driveshaft, composite clutch disc and an OEM pressure spring. Step 9 - Remount Rear Brake Caliper Reinstall the brake caliper, align brake pad hardware and reinstall caliper mounting bolts. True 6 True or false What are the three major parts of a disc brake assembly? jason bradley 3abn wife; go section 8 mckinney, tx; cooper kupp net worth 2021; wilson combat edc x9 rmr; freshman internships summer 2022 computer science; during caliper reassembly all old rubber parts . 26 6 Wheel bearings damaged or worn (Chapter 6). Answer (1 of 18): I have heard of this happening, and in professional circles/discussions, we are taught to avoid pushing fluid back into the system for this exact reason. Odds are, corrosion built up between the piston and bore is what made things stick. Tech A b. Unbolt the brake line from the caliper. caliper to the caliper bracket. 347 0 obj <>/Filter/FlateDecode/ID[<20EA7600D346534B86BCE0076B982301>]/Index[317 70]/Info 316 0 R/Length 134/Prev 955457/Root 318 0 R/Size 387/Type/XRef/W[1 3 1]>>stream You should be able to switch back to the DOT 5 by flushing out and cleaning the old fluids from your lines and caliper. Gear-obsessed editors choose every product we review. Too expensive in time compared to a rebuilt. $140 Set of four stainless braided hoses. .#^E`"N*5NUB#9I,,\:3{pu?@?@[zhA xC)&;.%EEupu +, Here's how to make them move again after they freeze up. P.O. After the stock caliper, rotor, and brake line are removed, the new parts are reinstalled. If the caliper shows signs of distress, the master cylinder should also be Your brake system relies on a number of moving parts to achieve consistent, safe braking. If you wish to recoat them then it will be longer. It all depends on which caliper generates the most amount of force. The handbrake lever shaft needs some wheel bearing grease on it before sliding it back in. c. a change in a developmental gene or in its regulation that altered the spatial organization of body parts. The brakes still work fine and there are no leaks, but should I be considering pre-emptive servicing to prevent any problems on the road? Bleed nipple and brake line port can be seen in this view. Put them all in a bag and dump some of the oil and shake the bag. One package is needed per caliper. When the diameter does not satisfy the specified value, replace the snap ring with new one. A quick trip to the auto parts store, followed by a round of phone calls to dealerships and stores within an increasingly large radius turns up nothing. In my 30 years of wrenching the 11 BMW's I've owned, I've never had a factory caliper pin fail or corrode, and I assemble w/o lube. 30. Install the new brake pads with supplied shims/anti-squeal compound, and mount the caliper on the car again. They are measuring tools, and they come in a variety of shapes and have different specifications to perform their role accordingly.