|
|
|
#1
|
||||
|
||||
How to guide to replace front Brake Pads and Rotors on a W123
I thought I would make this pictorial for all the people that are clueless as to how to do this job, just as I was at first. I hope this helps everyone. You need: 2 front rotors Set of front pads Disc brake wheel bearing grease Brake pad paste 10mm hex socket 5mm hex socket 19mm socket Torque wrench Channel locks DOT 4 brake fluid
16 slide the bearing back in after you have packed it with grease. Screw the big nut back on and tighten it then back off until you feel it break free(about 1/3 of a turn to the left). You don’t want to much pressure on the bearing or it will not spin freely. Then snug down the 5mm bolt.
18 push the piston in the calipers back and slide in the new pads. 19 Snap in the new sensors your done. I hope this will be of help.
__________________
1985 300TD Turbo Euro-wagon 1979 280CE 225,200 miles 1985 300D Turbo 264,000 miles 1976 240D 190,000 miles 1979 300TD 220,000 GONE but not forgotten 1976 300D 195,300 miles 1983 300D Turbo 175,000 miles http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg Last edited by 79Mercy; 11-02-2008 at 10:00 PM. |
#2
|
||||
|
||||
useful
|
#3
|
||||
|
||||
Another great post for everyone.
Dave
__________________
1970 220D, owned 1980-1990 1980 240D, owned 1990-1992 1982 300TD, owned 1992-1993 1986 300SDL, owned 1993-2004 1999 E300, owned 1999-2003 1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD 1988 560SL, 100,000mi, owned since 1995 1965 Mustang Fastback Mileage Unknown(My sons) 1983 240D, 176,000mi (My daughers) owned since 2004 2007 Honda Accord EX-L I4 auto, the new daily driver 1985 300D 264,000mi Son's new daily driver.(sold) 2008 Hyundai Tiberon. Daughters new car |
#4
|
|||
|
|||
I'm a bit disappointed at the omission of the following points:
1) The inner wheel bearing was not removed and cleaned and repacked. 2) The outer wheel bearing was removed, but not cleaned and repacked. 3) The contact surfaces where the pads ride on the calipers were not thoroughly cleaned and greased. 4) The setting of the clearance via the hit or miss method is fraught with risk for a new mechanic who has never done it. If the bearing is tight, it won't last 1000 miles. |
#5
|
||||
|
||||
1. true
2. It was re-packed 3. I used the pad paste and cleaned up the pistion before pad insertion. 4. ????, the bearing isn't tight.
__________________
1985 300TD Turbo Euro-wagon 1979 280CE 225,200 miles 1985 300D Turbo 264,000 miles 1976 240D 190,000 miles 1979 300TD 220,000 GONE but not forgotten 1976 300D 195,300 miles 1983 300D Turbo 175,000 miles http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg |
#6
|
|||
|
|||
Quote:
2. All well and good.........but, the casual observer won't catch it or understand it. 3. The pad paste has nothing to do with cleaning the caliper slides with a stiff wire brush and adding brake pad grease to the slides. 4. For you..........maybe............for others..........it could be. |
#7
|
||||
|
||||
Thanks for this posting as I will most assuredly save it in my "How-to" folder for safe keeping. This job is one I will likely do in the spring or early summer!
__________________
Dale 1995 E320 Wagon 185K [SOLD] 1988 260e Sedan 165K 2007 F-150 XLT 188K [SOLD] 2003 Harley Davidson FLTRI Anniversary 26K ----------------------------- 2006 BMW 330Ci 110K - [SOLD]
|
#8
|
||||
|
||||
I was instructed when isntalling the bearing retaining clamp/bolt that one should tighten it and back off a hair so the bearing will spin freely
|
#9
|
|||
|
|||
Use a dial indicator just once and you will see how absurd that procedure really is.
|
#10
|
||||
|
||||
Quote:
4. I promise, it isn't to tight. I tightened it and then backed off until I felt it break free and then tightened the 5mm bolt.
__________________
1985 300TD Turbo Euro-wagon 1979 280CE 225,200 miles 1985 300D Turbo 264,000 miles 1976 240D 190,000 miles 1979 300TD 220,000 GONE but not forgotten 1976 300D 195,300 miles 1983 300D Turbo 175,000 miles http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg |
#11
|
|||
|
|||
Quote:
The description is fraught with risk and ought to be expanded if one must use the Chevy way of tightening a wheel bearing. You are aware of the FSM spec of .0005" axial play.........correct? |
#12
|
|||
|
|||
Quote:
I'm not criticizing your own work. I don't know how successful you were with it. But, others will have problems with the description and the technique and I encourage you to modify and add to it if you want to provide an accurate document for the future. I wouldn't consider it a candidate for the DIY profiles in this condition. |
#13
|
||||
|
||||
whatever
__________________
1985 300TD Turbo Euro-wagon 1979 280CE 225,200 miles 1985 300D Turbo 264,000 miles 1976 240D 190,000 miles 1979 300TD 220,000 GONE but not forgotten 1976 300D 195,300 miles 1983 300D Turbo 175,000 miles http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg |
#14
|
||||
|
||||
Hmmm
Quote:
Quote:
Wheel bearing http://www.peachparts.com/shopforum/showthread.php?t=148772 FYI DATA EDIT: 0.01 millimeters is equal to 0.0003937008 inches 0.02 millimeters is equal to 0.0007874016 inches. Have a great day.
__________________
ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ Last edited by whunter; 11-26-2008 at 11:04 AM. |
#15
|
|||
|
|||
Take a look at the calipers where the pads ride. There are four machined pads on each caliper half that have a good surface finish. The backing plates contact these points and slide against them as they move toward the rotor.
One of the principal reasons for poor braking is the binding of the backing plates against these rusted and very poorly maintained surfaces. The reason that the pads are difficult to install is the failure of the owner to clean these surfaces and grease them. Oh, and.......have a great day. |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|