Final Drive Unit - Oil

[G Williams]

In an effort to quieten down the final drive, I have just drained the oil in my final drive, ready for filling when that exact oil arrives later today, it is the Castrol replacement for the oil specified on the manual, so is correct.

The magnetic oil drain plug is underneath the final drive and the filler plug is on the side. They are both the same size and have the same size washers on them, but only the drain plug has a magnet in the middle.

It takes 170ml of 75W/90, when the bike is upright the oil level should be level with the filler hole.

I don't know what the oil is supposed to look like yet but the stuff I took outafter 700mile post service is very metailic silver in colour and there was a good fingertip of metail sludge on the magnet.

In the piccy below, 1 is the drain plug and 2 is the filler plug. both should be tightened with new washers to 25Nm.

HTH

Thanks for that - much appreciated!
I ordered a new oil filter and 6 sump plug washers earlier. Don't suppose the washers are the same size for the final drive are they?

 

[MrPix]

Ok

I know what you are getting at, and I'm not trying to be clever or awkward, but the bevel box is sealed pretty much and there is no oil in the swing arm itself it's just a shell with a propshaft runnng dry with a UJ at either end that plugs in to splines from the gearbox via the torsional damper at one end and into the sealed bevel box at the other.

I guess it's possible if you are saying that this oil is coming from the gearbox, through the seals around torsional damper, across a universal joint, along the dry propshaft, across another universal joint and exiting before the bevel box at the joint... but that does not explain the oil from the breather... which is for the effectively sealed bevel box

 

[MrPix]

Thanks for that - much appreciated!
I ordered a new oil filter and 6 sump plug washers earlier. Don't suppose the washers are the same size for the final drive are they?

No such luck!

20mm OD, 14.4mm ID, 1.4mm thick.

 

[G Williams]

No such luck!

20mm OD, 14.4mm ID, 1.4mm thick.

Ha! - oh well...

 

[Aussie Mike]

Is this the final drive oil Triumph specify?
Also, is there a drain plug at the bottom of the final drive or do I need a syringe to remove and replace oil?
Thanks

Thats the correct oil for 2020 Rocket, I just changed mine the other day as the dealer didnt do it at the first service as specified in the service schedule, the bolt to drain is at the bottom of the drive unit, its an 8mm Allen head bolt. There will be very little oil in there as it only holds around 170ml

 

[MrPix]

Ha! - oh well...

Doh! I gave you the compressed size... if you wanted to grab a bucket full off them of an auction site, they are 20mm x 14mm x 1.5mm Copper washers.

 

[RedRoxy]

Hi, changed engine oil about 2 weeks ago and decided to change final drive oil as it is a pretty cheap piece of mind thing and I wasn’t confident the dealer changed it during the 600 mile break in service (4500 miles now but come up on the annual service period). i used new genuine Triumph crush washers (got them from dealer in individually sealed Triumph parts bags) for fill and drain final drive plugs and torqued to 25NM per service manual. A few days after I noticed some oil on the drain plug. Wipped it up and thought maybe just some residual from the service. A few days later noticed some additional oil and checked the torque on the plugs again and they were 25NM (though now about 30NM after the check). Wiped plug clean and inspected again today and I see some oil (I’ll call is "seeping") from The fill and the drain plugs. All told maybe 2-3ml have seeped out but I can’t stand leaks and especially not on a final drive unit that hold such a small amount of oil.

I’m wondering if maybe there is an issue with the breather not allowing for heat expansion of the oil and building pressure in the final drive resulting is oil seeping out of both fill and drain plugs.

thoughts Anyone?

 

[TURBO200R4]

Hi, changed engine oil about 2 weeks ago and decided to change final drive oil as it is a pretty cheap piece of mind thing and I wasn’t confident the dealer changed it during the 600 mile break in service (4500 miles now but come up on the annual service period). i used new genuine Triumph crush washers (got them from dealer in individually sealed Triumph parts bags) for fill and drain final drive plugs and torqued to 25NM per service manual. A few days after I noticed some oil on the drain plug. Wipped it up and thought maybe just some residual from the service. A few days later noticed some additional oil and checked the torque on the plugs again and they were 25NM (though now about 30NM after the check). Wiped plug clean and inspected again today and I see some oil (I’ll call is "seeping") from The fill and the drain plugs. All told maybe 2-3ml have seeped out but I can’t stand leaks and especially not on a final drive unit that hold such a small amount of oil.

I’m wondering if maybe there is an issue with the breather not allowing for heat expansion of the oil and building pressure in the final drive resulting is oil seeping out of both fill and drain plugs.

thoughts Anyone?

I do not think it is the vent
i would do it again and put a little black silicone on both plugs