Replacement Trailer Dust Cap/Cover for Dexter 21-88

Question

Question:

I need the dust cap rubber plugs for the dexter 21-88 dust caps. I think the new number RG04-300 . Also if you sell the socket to install amd remover these dust caps i would appreciate the part number. Thank you ,

asked by: Ismael M

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Expert Reply:

The replacement oil bath hub cover for your Dexter 21-88 hubs is the part # RG04-300 that you referenced. Normally you wouldn't use a large socket or wrench to remove these. Most of the time it's easiest to use a large set of channel locks to grab the head head of the cap.

expert reply by: Jameson C

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Answer 1

You have found it! Oil cap kit #RG04-300 includes the 21-88 oil cap you are looking for. The plug and o-ring are also included.

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Answer 2

I reached out to Dexter and they recommend using 20-30 ft lbs of torque for the Replacement Oil Cap Kit for AL-KO and Hayes 10,000-lb to 16,000-lb Axles #K71-859-00.

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Answer 3

The only time that I've seen a plastic cap is for an oil cap, so for your gooseneck trailer the Dexter Axle Replacement Oil Cap Kit for 9,000-lb and 10,000-lb Axles #RG04-300 should be the right fit as it has a threaded diameter of…

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Answer 4

The recommended lug nut torque for your 7,000lb axle depends on a few factors like wheel size, stud size etc. Check out the attached photo which shows the torque specs for a variety of applications. I see you were looking at the Dexter Nev-R-Adjust…

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Answer 5

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 6

Even though I cannot comment specifically on the grease you used because I am not familiar with it, I can tell you the best grease for trailer bearings is a a grease with a rating of GC-LB, which just means it is made to withstand very high…

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Answer 7

A BT8 spindle would have a diameter of .99 of an inch where the bearings would both install and would have a diameter of 1.24 where the great seal would ride. That would require a hub part #AKIHUB-440-2-1K for an idler hub. A BTR spindle would have…

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Answer 8

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 9

To determine the size of the hub assembly you need to purchase you have to determine which bearings are in the old assembly. If the old assembly has L44649 inner bearings, you would use the hub you chose #8-258-5UC1. If the inner bearings are marked…

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Answer 10

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 11

To determine the size of the brake assemblies you need you have to measure the depth and width of the hub drum on the axle like what you see in the picture I attached. The most common size is 2-1/4 inch wide like the #T4071600-500 that you…

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Answer 12

To find the load capacity for your axle you should look on the trailer VIN plate or sticker that lists the VIN number. The weight rating of the axle should be listed on that same plate or sticker. Also, the axle could have a tag or plate on it that…

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Replacement Trailer Dust Cap/Cover for Dexter 21-88

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