On the small bushing with metal caps you do not need to install a grease fitting in this location. Use a socket of appropate size to press the plastic bushing in. Pack with grease then use a vise to press both stainless caps in at the same time. 

Other locations install grease fittings first. Then use a rubber mallet (Do not use a vise on these) to gently tap BOTH bushings in each end, being sure the O-ring is facing the outside. Pack with grease inside and on pin. With opposite side on a solid surface use a mallet to tap the steel pin all the way in. to Once the bushings are properly installed and a arms are on the machine, use a grease gun connected to the grease zerk fittings to pump grease into the bushing. You should pump grease until you feel resistance and then stop, do not force grease in after you begin to feel resistance as this could damage the O-ring seals. You should try to pump grease into the grease zerk fitting at each maintenance interval but after the initial installation they should not take much, if any grease.

Lifetime warranty on bushing kits.
Terms of Warranty:
Item must have been purchased directly                                                   from us to the original buyer.                                                                      Bushings must have grease when installed and on 2017 & Up XP1000, Turbo, 900s, Pro XP, Turbo S models you will need to install grease fittings into the a arms.
 Warranty does not cover damage from a crash, hitting a tree, running off a cliff or any other type of hard hit.
Defective bushing and pin MUST be sent back to us to test and inspect. A copy of your original invoice / sales receipt MUST be sent with the item as well.
Buyer will be responsible for paying shipping for the newly exchanged items being sent back to the buyer.

In order to make sure that you get the best use out of our bushing kits, we are asking that you comply with the use of a grease fitting at the initial installation of our product. In order to make sure that your busing kit is covered by our life time warranty, we ask that you either use your own grease fitting kit or purchase our kit for an additional $20. This will ensure that you are covered by our warranty and will also ensure that you get the best use out of our product.