this piece of equipment is not a lifttruck class machine
it is considered 'heavy equipment' by most standards and you should inquire about manuals with your local cat heavy equipment dealer.
One other tidbit of info i learned about these units is if you look closely at the tag's like the dataplate it could also be manufactured by JLG built specifically for caterpillar.
But do not try to cross reference it with the JLG machine, you will not find the correct 'caterpillar' specific information needed to service the unit.
If you contact your local cat dealer that handles heavy equipment they might give you the information you seek or sell an operators manual to you.
In either case the machine is supposed to have this manual on it in a pouch or in some type of document holder on the machine at all times, it is required by law. These pouches or holders are usually located inside the operators compartment, most of the time under the dash or behind the seat or on the backside of the seat backrest.