1. Shimano Nexus 3 Speed Diagram
  2. Shimano Nexus 3 Speed Hub Manual Pdf
  3. Shimano Nexus 3 Speed Kit
  4. Shimano Nexus 3 Speed Manual

The old Shimano 3-speed hubs are failure-prone. First question to ask before rebuilding one of these hubs is whether it is worth the trouble. From Nexus series probably also will. Rebuilding instructions for cartridge-type hubs start on page 5-14, following those for the 3SC. Rebuilding instructions for cartridge-type hubs start on page 5. I haven't worked on these hubs for a while, but I recall that the cartridge-type internals will work in the 3SC shell if the S3C's screw-in right ball cup is used, and the left bearing cone/reaction arm assembly is pried apart to replace the left dustcap with the one from the 3SC. The old Shimano 3-speed hubs are failure-prone.

There are many benefits of using an internally geared hub. For the most part, the unit is sealed off the elements, you can use them in a belt drive system, they shift really fast, etc. When we get one of these hubs from Shimano, or on a built bike, they come packed full of grease. With most Shimano internally geared hubs, grease is used to lubricate moving parts. However, here in Minnesota, extreme temperatures can change the way grease acts, especially when you're dealing with gears only a few millimeters in diameter.
Shimano Nexus 3 Speed Hub Manual
Today we will talk about how to clean, service, and re-lubricate (with winter in mind) a Shimano Nexus 8 speed internally geared hub.

Shimano Nexus 3 Speed Diagram

Click here and find out the manuals of SHIMANO products, technical information, safety data sheet of grease and so on. User's manuals are describing safety information and procedures for consumers, dealer's manual are describing how to assemble and adjust the product for primarily professional bicycle mechanics. Tropico 4 mac download free. View and Download Shimano Nexus Inter-8 dealer's manual online. Nexus Inter-8 bicycle accessories pdf manual download. Also for: Nexus inter-7, Nexus inter-5. 7-speed hub (12 pages) Bicycle Accessories Shimano GRX RX 815 Series Dealer's Manual (192 pages).

First, we need to remove the external components. Turn the shift mechanism locking to the left and the shift assembly slides right off.

Remove the cog snap-ring. This thing can be a huge pain. Unhook it from its groove and get a screwdriver under it. From there, all you have to do it walk it around till it comes off. I like to wear safety glasses of some sort when doing this. Snap-rings can be unpredictable at times.

After the cog comes off, there is a dust shield and seal exposed.

Once removed, the drive side is now prepared for the cartridge to come out.

This bike is equipped with a roller brake. It's almost like a drum brake that's actuated with a hexagonal nut looking thing that 6 rollers rotate around pushing pressure plates against the inside diameter of the braking surface.
There is one nut that holds the assembly to the hub shell. Once that's removed, the whole brake comes off.

We now have access to the wench flats of the cone and lock-nut. These can be completely removed..

The dirty, greasy parts get a nice hot bath in the parts washer. I usually let the cartridge sit for an hour or so to allow the old grease to break down.

Here is an exploded view after the parts are all cleaned.

Must be 'Blue Razzzberry.'

The cartridge gets soaked till it's good and saturated. I usually wait till the bubbles subside.

Clean the inside of the hub shell.

Apply grease to the bearings and clutch rollers. I also inject 3cc or 4cc of the special Shimano oil (ice cream topping) between the gears before putting everything back together.

Reinsert the cartridge and wipe off the excess grease.

Re-adjust bearing on the non-drive side till there is no play.

Grease back of dust shield and reinstall.

Shimano Nexus 3 Speed Hub Manual Pdf

Grease the back of the cog and reinstall (We have had issues with these making noise, and grease seems to solve the problem).

Realign red dots with red, yellow dots with yellow..

.. And rotate lock-ring to lock the shift mechanism in place.

It's good practice to lubricate the roller brake regularly. Squirt some special roller brake grease in the grease port.

Shimano Nexus 3 Speed Kit


Shimano Nexus 3 Speed Manual

Loosely install the roller brake. Tighten the drive side axle nut, align the reaction arm, then tighten the roller brake nut to fix it to the hub.

Seat the axle in the dropouts and fasten both axle nuts. Align belt if applicable. Check all the gears to make sure there are still 8 of them. If there aren't as many as when you started, something went wrong. Shift into 4th gear and use cable tension to align the two yellow marks in the window.

After performing this service, the hub felt like it shifted faster and more crisply, especially in the extreme cold. One of our year-round commuting employees, Ben, who uses the same hub described the overhaul to make the shifting 'less gummy and more direct. It gives me all of it,' he concluded. I'm not really sure what that last part means, but it sounds pretty positive.
— filed under: Shimano, Tech

Service manuals for modern Shimano internal gear hubs

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Shimano Nexus 3 Parts List
Exploded diagram and parts list for the Shimano Nexus 3-speed coaster brake (SG-3C41)
Shimano Nexus 3 Owner's Manual
Owner's manual for the Shimano Nexus Inter-3 Coaster Brake (SG-3C41). This is the most common 3-speed internal gear coaster hub on new bikes.
Shimano SG-7C16 7-Speed Coaster Brake Parts List
One of 3 versions of the Shimano Nexus Inter-7 Coaster Brake hub on the market.
Shimano SG-7C18 7 Speed Coaster Brake Parts List
Parts list & exploded diagram for the Shimano SG-7C18, one of the 3 versions of the Nexus Inter-7 Coaster Brake hub.
Shimano SG-7C16 and SG-7C18 Owner's Manual
Owner's manual for the Shimano SG-7C16 and SG-7C18 Nexus Inter-7 Hubs
Shimano SG-7C26 Nexus Inter-7 Coaster Brake Hub Parts List
The third version of the Nexus Inter-7 Coaster Brake hub
Shimano CB-D110 Single Speed Coaster
The 'D-type' is an older Shimano coaster brake design
Shimano CB-E110 Single Speed Coaster
The 'E-type' is a common single-speed coaster brake on newer bikes. Surprisingly good quality compared to many other generic coaster brakes!
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