|
700/900 Series General Forum for the Volvo 740, 760, 780, 940, 960 & S/V90 cars |
Information |
|
Replacing front brake disc shieldsViews : 3020 Replies : 64Users Viewing This Thread : |
|
Thread Tools | Display Modes |
Aug 18th, 2021, 08:52 | #1 |
Torquemeister
Last Online: Today 08:19
Join Date: Dec 2004
Location: Asgard, Cheshire
|
Replacing front brake disc shields
I've got to replace the front shields on the Exxon Valdez (1997 940) as the old ones have more holes than metal.
Is the hub nut a 27mm or a 36mm one? I have seen both sizes quoted and want to make sure before starting the job that I have the correct socket. The process itself looks straightforward: jack up and support the front end; remove the road wheel; undo and secure the caliper; remove the disc and hub nut; apply heat/penetrating fluid/"industrial language"/cutting torch to the old backing plate; clean up the mounting and apply sticking plaster/soothing balm to injuries; fit new plate; re-install disc, hub nut, caliper and road wheel, tightening as you go; have another brew and biscuit/pastry of choice; attend minor injuries clinic. If anything is missing from the above please feel free to add it in.
__________________
loki_the_glt - Skipper of the Exxon Valdez, driver of Sweden's finest sporting saloon - and pining for another Slant-4. |
The Following 2 Users Say Thank You to loki_the_glt For This Useful Post: |
Aug 18th, 2021, 09:26 | #2 |
Go redblock or go home
Last Online: Today 06:33
Join Date: Feb 2012
Location: UK
|
I'm pretty sure it is a 36mm but it needs to be a thin walled socket as a normal thickness one doesn't fit inside the recess.
|
The Following User Says Thank You to 360beast For This Useful Post: |
Aug 18th, 2021, 09:31 | #3 | |
Premier Member
Last Online: Today 15:06
Join Date: May 2012
Location: Lakenheath
|
Quote:
I think it'll be a case of "Suck it and see", i know on my other beast the OE nut is 32mm but aftermarket suppliers send a 36mm nut (same thread size as OE though) mostly although i've heard of 30mm nuts as well. That is on the driveshaft that goes through the hub and is torqued to ~315lbft, much higher than the Volvo! I therefore suspect there is one size on the Volvo that is the OE size but the nuts supplied with aftermarket bits may well be different. As for your method statement, it sounds about right except for no mention of the pads - presumably dealt with alongside the caliper though. That aside, a bit sparse on the application of Curses and Naughty Words and refreshments for my liking, i'd need much more of those in my method statement!
__________________
Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........ |
|
The Following User Says Thank You to Laird Scooby For This Useful Post: |
Aug 18th, 2021, 09:39 | #4 |
Premier Member
Last Online: Feb 11th, 2023 20:32
Join Date: May 2010
Location: Blyth, Northumberland
|
The front hub nuts on my 1992 940 are 36 mms. I had to buy a suitable socket. Not sure about the “thin wall” as mentioned by Luke.
They a VERY tight. I managed to free the nearside one with a long breaker bar but could not move the offside one. Extending the breaker bar with a scaffolding pole threatened to snap the breaker bar or burst the socket. I took the car to my friendly local garage who loosened it with an impact wrench. Then I tightened it enough to drive the car home. Take care when removing the hub as the bearings are a loose fit. Wrap your fingers around the back of the hub as you remove it to prevent the bearing dropping out. The wire to the ABS sensor is located in a small bracket attached to the back plate. This will need to be removed and transferred to the new back plate. I think that it was originally secured with a very small nut and bolt which was so badly corroded it needed to be cut. I secured the bracket to the new back plate with a pop rivet. I bought replacement hub nuts from my dealer ( VO 1387624 ) but refitted the old nuts with thread lock. Haynes states torque is 100Nm plus 45 degrees.
__________________
Ian. Since 2005: 1992 Volvo 940 estate 2.0L. Manual. Daily driver and workhorse. Last edited by Ian21401; Aug 18th, 2021 at 09:48. |
The Following User Says Thank You to Ian21401 For This Useful Post: |
Aug 18th, 2021, 09:59 | #5 |
Premier Member
Last Online: Today 15:56
Join Date: Jul 2012
Location: Lenzie
|
99.9% certain its a 36mm socket as I bought one last year for my impact wrench. I also replaced the bolts holding the plate to the strut as they were completely knackered.
I can double check when I get home if you want ?
__________________
V70 D5 SE Geartronic 215bhp Saville Grey 2012MY 940 LPT Manual 1996 740 SE 1990 |
The Following 2 Users Say Thank You to griston64 For This Useful Post: |
Aug 18th, 2021, 10:12 | #6 |
Premier Member
Last Online: Today 15:56
Join Date: Jul 2012
Location: Lenzie
|
Just checked and it was 36mm. I just bought a standard 1/2 drive impact one and it fitted the recess fine
__________________
V70 D5 SE Geartronic 215bhp Saville Grey 2012MY 940 LPT Manual 1996 740 SE 1990 |
The Following 2 Users Say Thank You to griston64 For This Useful Post: |
Aug 18th, 2021, 10:32 | #7 |
Premier Member
Last Online: Jun 16th, 2024 19:56
Join Date: Jul 2009
Location: Holywood
|
Just pop the cover off to check, you might even be able to do it without removing the wheel.
Make sure you have a good breaker bar, I just about managed with 0.6m, I struggled to get it fully tightened with the bar nearly breaking in the process. Probably 1m is needed and ideally 3/4" drive. The bearing in later cars (ie yours) are integrated with hub, they won't fall out. If you have high miles and are getting steering wobble under hard braking you might want to consider new hubs in the process. The bearings are not adjustable and when worn just become loose. Mine were gone at 170,000 miles but not detectable by the normal hand tests. Last edited by TonyS9; Aug 18th, 2021 at 10:46. |
The Following 2 Users Say Thank You to TonyS9 For This Useful Post: |
Aug 18th, 2021, 10:38 | #8 |
Premier Member
Last Online: Today 15:56
Join Date: Jul 2012
Location: Lenzie
|
__________________
V70 D5 SE Geartronic 215bhp Saville Grey 2012MY 940 LPT Manual 1996 740 SE 1990 |
The Following 3 Users Say Thank You to griston64 For This Useful Post: |
Aug 18th, 2021, 10:48 | #9 | |
Premier Member
Last Online: Today 15:06
Join Date: May 2012
Location: Lakenheath
|
Quote:
New hubs including bearings can be scarily expensive, especially if they don't need doing yet.
__________________
Cheers Dave Next Door to Top-Gun with a Honda CR-V & S Type Jag Volvo gone but not forgotten........ |
|
Aug 18th, 2021, 10:58 | #10 | |
Premier Member
Last Online: Today 15:56
Join Date: Jul 2012
Location: Lenzie
|
Quote:
2x6819759- £109.80. ABS RING TO PRESS ON HUBS. a pair I replaced mine with SKF which were still £100.00 each
__________________
V70 D5 SE Geartronic 215bhp Saville Grey 2012MY 940 LPT Manual 1996 740 SE 1990 |
|
The Following 2 Users Say Thank You to griston64 For This Useful Post: |
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
|
|