Rear axle bearing question

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johnscf
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Rear axle bearing question

Post by johnscf » Wed Apr 17, 2019 8:02 pm

Had a rumbling noise from left rear wheel. Pulled the axle and the bearing is bad. Never done this before so how do i go about replacing the bearing? What’s the best way to take the bearing off and where do i get a replacement bearing. I plan to do both sides while i’ve Got the car out of commission. Any advise appreciated.

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Solex68
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Re: Rear axle bearing question

Post by Solex68 » Wed Apr 17, 2019 10:07 pm

I want to know too. Want to replace my bearings.
Greg a.k.a SOLEX68 - http://www.datsunvents.com/
Laguna Hills, CA
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Always willing to help another Datsun Roadster owner
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Toptech360
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Re: Rear axle bearing question

Post by Toptech360 » Wed Apr 17, 2019 11:15 pm

You need a press. I wouldn't recommend this particular job to a novice...unless being apprenticed.

There are several write-ups with photos within the forum. YouTube videos can be helpful too. Alot of at home mechanics like to pull the axles themselfs and then take the axle assemblies to a shop for the press work and actual bearing replacement. It's a good way to get to know how stuff works without investing a bunch of time and money into tools and equipment. All depends on what you want to do I suppose.
Dan
1964 Datsun SPL310. The Datsun
1997 Toyota Tacoma LX 4wd. The Truck
2009 Subaru Forester XT.
2017 Toyota AWD Swagger Wagon.

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ted heaton
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Re: Rear axle bearing question

Post by ted heaton » Thu Apr 18, 2019 12:38 am

Here is what you need.
https://www.datsunparts.com/1573

Some axle rebuild tips.
Do both sides.
Use the new sealed bearings to reduce the common problem of bearing failure due to lack of grease in the original open bearings.
Request the shop PRESSES off the bearing collars. Cutting/Torching is quick but have seen damaged axles when not done carefully.
DO replace/reuse the most likely ruined very thin (3 mm?) metal bearing shims. You may have to buy thin sheets and cut your own.
These do serve a purpose as the bearing seat is cut so the bearing sits slightly proud.The shims prevent excess pressure on the bearing
"While your in there" Check brake lines/hoses, slave cylinders, brake shoes and replace as needed. Remove, clean and lube the brake shoe adjuster.

Ted
Ted Heaton
Bellevue, Washington
DROPS (Datsun Roadster Owners of Puget Sound)
SPL31003054 1964 1500
SPL31112958 1967.5 1600 S15 SR20DET
SRL31105015 1968 2000 S13 SR20DET
SRL31112326 1969 2000 Honda VTEC

johnscf
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Re: Rear axle bearing question

Post by johnscf » Thu Apr 18, 2019 8:09 am

thanks for the info. I plan to take it to a machine shop and get them pressed off and the new ones put on with new collar, inner seal and grease catcher plate. How do I know how much shim material to use? When I took my axle out the shim material was peeling away and it looks like there were several layers.

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Re: Rear axle bearing question

Post by Toptech360 » Thu Apr 18, 2019 10:36 am

Don't confuse the metal shim stock for the paper gasket.
Shims are nla so reuse or make new. For what it's worth my car had no shims when I did my bearings last year. The rear axle assembly on my car is not the original axle so I would suspect at some point it did have shims. I ended up putting it together without. Time will tell if problems arise from that decision.
Dan
1964 Datsun SPL310. The Datsun
1997 Toyota Tacoma LX 4wd. The Truck
2009 Subaru Forester XT.
2017 Toyota AWD Swagger Wagon.

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Linda
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Re: Rear axle bearing question

Post by Linda » Thu Apr 18, 2019 10:43 am

Always helpful to see what past experience and discussions have been:
viewtopic.php?f=3&t=22123&start=15
Linda
Last edited by Linda on Thu Apr 18, 2019 10:39 pm, edited 1 time in total.
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Tech Wiki->Parts->Parts Interchange
Archives has it all

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Solex68
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Re: Rear axle bearing question

Post by Solex68 » Thu Apr 18, 2019 8:21 pm

I have all the parts including the shims.
Greg a.k.a SOLEX68 - http://www.datsunvents.com/
Laguna Hills, CA
68 2000 U20
Always willing to help another Datsun Roadster owner
Pending installs: SS brake lines, Stan Stealth Dizzy, Denso TT plugs

johnscf
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Re: Rear axle bearing question

Post by johnscf » Fri Apr 19, 2019 8:39 am

where did you find the shims?

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Solex68
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Re: Rear axle bearing question

Post by Solex68 » Fri Apr 19, 2019 7:26 pm

I bought them when they were available. I have to count and see how many I have.
Greg a.k.a SOLEX68 - http://www.datsunvents.com/
Laguna Hills, CA
68 2000 U20
Always willing to help another Datsun Roadster owner
Pending installs: SS brake lines, Stan Stealth Dizzy, Denso TT plugs

johnscf
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Re: Rear axle bearing question

Post by johnscf » Sat Apr 20, 2019 1:24 pm

let me know if you've got enough to spare some if not I'll go the make your own route.

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datsunrides
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Re: Rear axle bearing question

Post by datsunrides » Sat Apr 20, 2019 3:39 pm

The shims are to set end play. There should be no preload on the bearings. I don’t have access to specs but usually there is .008 or so of end play. Ideally you need a dial gauge to set this, but as long as the axle will slide in the housing just a wee bit, is should be ok.
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ted heaton
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Re: Rear axle bearing question

Post by ted heaton » Sat Apr 20, 2019 6:18 pm

datsunrides wrote:
Sat Apr 20, 2019 3:39 pm
The shims are to set end play. There should be no preload on the bearings. I don’t have access to specs but usually there is .008 or so of end play. Ideally you need a dial gauge to set this, but as long as the axle will slide in the housing just a wee bit, is should be ok.
DAM, I like old school mechanics. " a wee bit", Is that half a "scootch", 1/4 of a "tad"?
:lol: :lol: :? :? :roll: :roll: :wink: :wink:

Ted
Ted Heaton
Bellevue, Washington
DROPS (Datsun Roadster Owners of Puget Sound)
SPL31003054 1964 1500
SPL31112958 1967.5 1600 S15 SR20DET
SRL31105015 1968 2000 S13 SR20DET
SRL31112326 1969 2000 Honda VTEC

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datsunrides
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Re: Rear axle bearing question

Post by datsunrides » Sun Apr 21, 2019 11:14 am

Ted, there is another common mechanic term for this, but I didn’t want to disrespect our female members.
1966 Roadster
Turbo / EFI U20 (T25 w/ SDS EMU.)

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RCMike
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Re: Rear axle bearing question

Post by RCMike » Sun Apr 21, 2019 12:03 pm

datsunrides wrote:
Sun Apr 21, 2019 11:14 am
Ted, there is another common mechanic term for this, but I didn’t want to disrespect our female members.
Hahahahaha