1 Device%Maintenance%at%a%Glance%
WHILL%Maintenance%Overview%%
Materials%and%Tools%%
The%following%tools%are%needed%to%properly%configure%WHILL%device%components:%%
Metric%Allen%key%set.
%Most%of%the%configurations%on%the%device%require%the%loosening%of%hex%
screws.%In%particular,%the%#2.5%#3,%#4,%#5,%and%#6%Allen%keys%are%absolutely%necessary.Note:&For&
metric&tools,&there&are&numbers&associated&with&different&sizes&that&all&refer&to&their&diameter&
(e.g.,&a&hex&wrench&that&reads&“3”&is&a&3mm&diameter&hex&wrench).&&
Socket%ratchet,%metric%socket%set,%and%extensions.%
For%these%tools,%it%is%important%to%have%multiple%
extension%lengths%to%reach%difficult%locations%on%the%device.%The%only%socket%size%required%is%#12%
(12%mm).%If%possible,%use%an%adjustable%torque%wrench%to%properly%fasten%the%bolts%at%a%given%
“optimal”%torque%setting%(to%be%given%later%in%this%document).%
Clippers%and%zip%ties.%
There%are%components%on%the%WHILL%device%that%are%connected%to%each%
other%via%electrical%wiring.%These%zip%ties%prevent%loose%hanging%wires%and%also%provide%some%
measure%of%strain%relief.%When%configuring%or%exchanging%components,%be%sure%to%note%the%
location%of%existing%zip%ties%before%removing%them,%and%replace%them%after%the%configuration%is%
complete.%It%helps%to%work%on%one%side%at%a%time%to%maintain%a%reference.%%
