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Curtis air conditioners feature an assembly of parts designed for your vehicle which require 
adjustment and alignment of components to accommodate vehicle variations. For accurate 
installation, proper operation, and years of satisfaction, please read and understand the 
Service & Owner’s Manual fully prior to installing the air conditioner. 
 
From all of us at Curtis, we thank you for choosing our product.
 driver and passenger.
 Curtis accessory weights are listed in product
 add additional weight to the base vehicle. All
 Curtis Cabs, blades and general accessories
ADDED
WEIGHT
 brochures. Deduct the accessory's total weight
 from the vehicle's rated capacity and never
 exceed the vehicle's rated capacity including
 Exposure to Carbon Monoxide can Cause illness, seri-
ous injury or death.  Never operate vehicle if suspicious 
of Carbon Monoxide.  Inspect exhaust system for leaks 
monthly.  Leaks can result from loose connections, corro-
sion, cracks or other damage to the exhaust manifold.  If 
leaks are found, repair or replace exhaust system.  Do not 
use vehicle until repair or replacement is complete. 
2. WARNINGS 
HELPFUL HINTS: 
•  Read and understand all instructions before beginning. 
•  Apply a silicone sealant to seal any minor gaps that may occur due to vehicle variations. 
•  Use caution to avoid damaging installed threaded inserts or weld nuts.  Begin the thread engagement by hand to avoid 
or correct potential cross threading. 
•  Plastic washers have been supplied to provide a weather seal under the heads of some exterior bolts. The plastic 
washer should be installed under each bolt head directly against the outside cab surface. Care should be taken not to 
over tighten the fasteners and damage the plastic washer. 
•  Silicone, Epoxy, Cork Tape, industrial hot melt glue, high adhesion duct work tape are used in sealing air, water drains, 
and preventing moisture build-up on internal components. Be sure to replace any of these sealants and/or fasteners 
when servicing or replacing components. Failure to properly install these components can result in performance 
degradation and damage to the components. 
 
GENERAL INFORMATION BEFORE YOU START 
California Health and Safety Proposition 65 Warning: This product may contain 
chemicals known to the state of California to cause cancer and birth defects or other repro-
ductive harm.   
Shock Hazard: Always disconnect the negative lead of the battery before servicing.  
Disclaimer: Always discharge air conditioner refrigerant in accordance with all federal, 
state, and local laws. 
System evacuation and charging must only be performed by an EPA Part 609 certified technician, 
using EPA certified refrigerant handling equipment suitable for R134a refrigerant. Both the technician 
and equipment must meet all State, Local and Federal requirements. R134a refrigerant is under high 
pressure and when released can cause severe bodily harm including from contact risk of localized 
frost bite. Always wear proper personal safety equipment when working on refrigerant system includ-
ing safety glasses and gloves. Follow refrigerant recovery equipment manufacturer’s safety and oper-
ation guidelines for use of their equipment. Only perform service in a well ventilated area away from 
contamination and sources of ignition. Never pressurize system with compressed air to perform a leak 
check. R134a refrigerant can become flammable and could explode under certain conditions.