To put the double shaver head on my wahl groomsman shaver

Wahl Micro Groomsman Trimmer

push on and turn

Wahl Home Products Micro Groomsman 5640 600

How to change the Battery in a beard trimmer - YouTube

? 3:38
https://www.youtube.com/watch?v=QlLqB9S5oaI
Oct 20, 2013 - Uploaded by Shake the Future
Do you have a beard trimmer/clippers that don't hold the charge? Time to change the battery and give your beard trimmer a second life. .... Wahl Trimmer All-In-One Lithium Ion Unboxing - TimmyTechTV - Duration: 6:32. by ...

Your best bet is to send it to www.mannyssharpening.com Contact [email protected] they are a Wahl Dealer they have all the parts for Wahl clippers.

Hello,

Oiling the trimmer is very simple. It is only necessary to apply oil to the blades. Simply apply one or two drops of oil directly to the blades while running. This should be done before each use.
You should have gotten a bottle of the blade oil with your clipper. If you have also lost this, you can buy a bottle of Wahl clipper oil from shaveroutlet.com. see link below

http://shaveroutlet.com/wahl-4oz-squeeze-bottle-clipper-oil-p-584.html

from the picture you have here, That I see you have a Wahl 8554 Wahl Alpha cordless clipper. but you stated the model 9918-6171 Groomsman Beard and Mustache Trimmer model, You need to be sure of what model you have. He are the two picture of each model. if this is correct, Mannys Sharpening has the charger for this cordless clipper, I had the same problem and he sent me one it took about 2 weeks for delivery.
The clipper on your Left is Wahl 9918

This clipper is the Wahl Alpa 8554 cordless
Call Mannys Sharpening he has all the replacement charger for Wahl.
323 263-4697

I had recently put together one that may or may not be the same - the head seperated from the body, and a small spring loaded detent inserts in the backside that "locks" the head at steadily increasing disances (lengths). The hardest part to assemble is the switch: which the outer slider is installed first, then the switch assembly (w/Small printed circuit board ) is slid very deeply into the plastic body of the shaver - you'll see where it locks into place. Then the lower circuit board and prongs attach at the bottom (also you can see where it locks in). Lastly, the battery is installed within its' holder and snaps into the plastic case. The two pars of the cases are then mated and click-lock into place (Think there's a single phillip's screw to keep it locked). Lastly, the blade cover snaps into place from the top, and you should be good to go - I never got to take it apart, but I had to put it back together...I believe that's how it goes, and mine works - there is no allowance for error, and it looks to me that if it's not 100% right it won't go together anyhow - good luck...

Most parts are available at http://www.wahl-store.com/ under "accessories" the 9918c is a "groomsman" model.

The attachment should hook over the teeth of the blades and then snap onto the back end.