1971 M375 single system rear rebuild
Author
Message
- Offline
- Senior Contributor
- Posts: 135
- Joined: Sun Dec 24, 2017 1:37 pm
- Travco Model: 1972 270
1971 M375 single system rear rebuild
A few pics of the process.\n\nFirst, remove wheels almost effortlessly in a few minutes\n\n\n\nAs the drum was removed, saw broken spring and other leaks and problems\n
You do not have the required permissions to view the files attached to this post.
Last edited by rjsdotorg on Tue Jun 05, 2018 11:49 pm, edited 1 time in total.
- Offline
- Senior Contributor
- Posts: 135
- Joined: Sun Dec 24, 2017 1:37 pm
- Travco Model: 1972 270
Re: 1971 M375 single system rear rebuild
This side had a new seal, but slaves leaked\n\n
You do not have the required permissions to view the files attached to this post.
- Offline
- Senior Contributor
- Posts: 135
- Joined: Sun Dec 24, 2017 1:37 pm
- Travco Model: 1972 270
Re: 1971 M375 single system rear rebuild
Slaves honed and polished.\n\n\nThis one isn't quite done.\n\n\nUsed 240 hone, then 320, 400, 600 1500 paper \npiston to wall clearance should be <=.006"\nassemble with brake system assembly lube\n\n\n1-3/8 cups then installed\n
You do not have the required permissions to view the files attached to this post.
Last edited by rjsdotorg on Tue Jun 05, 2018 11:55 pm, edited 2 times in total.
- Offline
- Senior Contributor
- Posts: 135
- Joined: Sun Dec 24, 2017 1:37 pm
- Travco Model: 1972 270
Re: 1971 M375 single system rear rebuild
axle had a wear groove from original seal and oil after 60k miles.\n\n\nPolished the surface and checked the location; the original seal was pressed all the way into the hub.\nNew National 456648 seals will be tapped just flush and so the lips will ride on clean steel.
You do not have the required permissions to view the files attached to this post.
- Offline
- Senior Contributor
- Posts: 135
- Joined: Sun Dec 24, 2017 1:37 pm
- Travco Model: 1972 270
Re: 1971 M375 single system rear rebuild
All the parts had to be degreased, power washed, acid rust treated, and heat paint sprayed.\nLoose assembly:\n\n\nself adjusters are smooth and clean\n\nAssembled with spring kit from Alretta Truck parts; spendy but the only ones in existence.\n\n\nThe springs that hook around the casting are a bitch to snap in.
You do not have the required permissions to view the files attached to this post.
- Offline
- Senior Contributor
- Posts: 135
- Joined: Sun Dec 24, 2017 1:37 pm
- Travco Model: 1972 270
Re: 1971 M375 single system rear rebuild
Best order of assembly:\n
- \n
- adjuster screws and slides etc\n
- heat shields and cylinders\n
- shoes and retainer nuts and washers\n
- adjuster arms and springs\n
- return springs\n
- connecting line
- Offline
- Senior Contributor
- Posts: 135
- Joined: Sun Dec 24, 2017 1:37 pm
- Travco Model: 1972 270
Re: 1971 M375 single system rear rebuild
a lower casting\n\n\nan upper\n\n\n
You do not have the required permissions to view the files attached to this post.
- Offline
- Senior Contributor
- Posts: 135
- Joined: Sun Dec 24, 2017 1:37 pm
- Travco Model: 1972 270
Re: 1971 M375 single system rear rebuild
Some notes on parts and such\n
You do not have the required permissions to view the files attached to this post.
- Offline
- Contributing Member
- Posts: 30
- Joined: Mon Feb 19, 2018 8:56 am
- Travco Model: 1972 travco
- Location: Arizona
Re: 1971 M375 single system rear rebuild
Looks good, this is on my to do list in the next month or so.
- Offline
- Senior Contributor
- Posts: 135
- Joined: Sun Dec 24, 2017 1:37 pm
- Travco Model: 1972 270
Re: 1971 M375 single system rear rebuild
\n\nIf you don't have a torque multiplier or 500lb impact, I cannot recommend it enough.\nThe springs also definitely require big proper spring tools.dirtydeno wrote:Looks good, this is on my to do list in the next month or so.