Sorry for the newbness here but I'm at my wits end.

I've had my 86 TRX 250 for about a year. It was in the shop for a carb rebuild and I had the oil changed. Now it is time for the oil change again and I was planning on doing it myself. Found the drain plug no problem but where does the filter go? I have the filter (cartrige type) but can't figure out where it goes.

Also, how do you drain the gear oil from the differential?

Thanks for the advice.

<insert retard emoticon here>

 

I am thinking 86 trx 250 (R)??? If it is an R it hasn't a filter, thats why you can't find it.

 

No, it's not the R. It is the "utility" version - 4 stroke, shaft drive, etc.

 

On the right side of the engine ( foot brake side ) just ahead of the kickstarter, there is a cover that may have a plastic piece on it, held on with 2 screws. you do not have to remove the screws on the plastic cover, but the three smaller bolts that hold the aluminum cover on have to be removed. An 8mm socket should fit the bolts. Once the bolts are removed the cover will pull outward and come off. Make sure the sealing o-ring is good and not torn. When installing the filter, the spring should go in the engine first. If the spring will not hold in place, put some grease on one end to make it stay in the side of the engine. Install the filter with the closed end toward the engine, The open of the filter with the rubber ring on it goes toward the cover. If it is installed backwards, the engine will be starved of oil. Put about 1 3/4 quart of oil in and start. Turn off and check oil level. The level is checked without screwing the dipstick in , resting on the engine. Adjust the oil level accordingly and snug the dipstick when done.
For the diferential fluid, stand behind the wheeler, on the left lower side of the carrier, there is a bolt head that a 10 mm socket will fit on. It should have an aluminum sealing washer under the head. remove it and the differential fluid should drain out. When it is done draining, reinstall the sealing bolt and washer. There is a larger cover that takes a 17mm wrench to remove, Take it off and fill with Hypoid gear oil until it is just below the edge of the lowest part of the cover opening. Sometimes the rear differential skid plate is bent and does not allow access to the drain screw, so I generally remove the skid plates, to get at the screw and keep from s dripping mess after draining. Also remember, all the covers have o-rings around them and do not need to be super tight to seal, Tighten all bolts and caps snug, They ere aluminum and can be easilly damaged by overtightening.

Here is a site that lists parts fiche for your unit. Click on OEM parts, follow the steps for year, brand, etc... Right crankcase cover will show you where the filter is ....

----- Gimpster -----

 

Wow. Thanks Gimpster!

I promise to get a manual for this thing and keep the stupid questions to a minimum.

 

Thats, OK, I service quite a few of those units that are used daily on farms and ranches still. Your questions aren't stupid, actually it tells me you are smart, to maintain your ATV.

Some of my customers units are beat to crap, but just won't die... They don't maintain them well and bring them to me when they die.


----- Gimpster -----