Installation manual

36
Installing the Fuel Tank - 50 Gallon, 22'' Diameter, Aluminum
OPEN STYLE TANK MOUNTING BRACKET
IMPORTANT FUEL TANK INSTALLATION INFORMATION
Effective the first quarter of 2011, all 50 gallon, 22'' diameter, aluminum
fuel tanks will come equipped with the mounting flange for the Ultrasonic
Fuel Level Sensor (USFLS) option.
Open Style Tank Mounting Bracket - New fuel tank mounting kits were
released November 1, 2008. Factory Kit 701635 and Aftermarket Kit
90-398 contain a new open style fuel tank mounting bracket. This new
mounting bracket can be used to install either a 30 or 50 gallon, 22''
diameter fuel tanks onto a typical trailer with standard crossmember
spacing of 6'', 8'', 10'' or 12''.
• Trailers with non-standard crossmember spacing of 9'', 15'' and 16'' will
require the additional components found in Kit 701658 (90-399) to
complete the installation.
• These new kits can not be used to install a 75, 90, 110 or 120 gallon,
22'' diameter fuel tanks. Those tanks require Kit 710278 (90-121).
• DO NOT substitute any components from Kits 701635 (90-398) and
701658 (90-399) with any previously supplied fuel tank mounting kits
as they are not interchangeable.
• Kits 701635 (90-398) and 701658 (90-399) are specifically designed to
install a 30 or 50 gallon fuel tank in a hanging position under a trailer
attached to the floor crossmembers. Substitutions are not acceptable!
A. Fuel Tank Position
• Thermo King recommends the fuel tank be mounted 203.2 mm
(8.00 in.) under the trailer as shown. Otherwise, the OEM or
installer is responsible to ensure the fuel tank position meets or
exceeds DOT or Federal Highway regulations, when applicable.
B. Tank Strap Position
• 50 Gallon Tanks - Fuel tank straps must be positioned 673 mm
(26.50 in.) apart as shown.
C. Rubber Strips and Pads
• Rubber strips must be properly installed on both the mounting
bands and the rubber pads must be installed onto the underside of
the hanger assemblies to prevent metal to aluminum contact.
D. Mounting Hardware
• Grade 5 mounting hardware is supplied. Substitutions are not
acceptable!
• All mounting hardware must be properly installed and torqued to
the specifications listed.
DANGER: An improperly installed fuel tank could lead to
serious injury or death! Consult your trailer manufacturer for
specific details on proper fuel tank installation and
recommendations.
CAUTION: The trailers crossmembers must be strong enough
to safely support the combined weight of the mounting
hardware, fuel tank and fuel.
Fuel Tank Capacity Combined Total Weight
50 Gallon Diesel 214 KG (471 lbs.)
Hardware Size Torque Specifications
3/8-16 Grade 5 42 N•m (31 ft-lb)
1/2 -13 Grade 5 81 to 88 N•m (60-65 ft-lb)
1/2'' T-bolts 48 N•m (35 ft-lb.)