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P32/42 C
HASSIS
P32/42 Rev. 12/98
It is recommended that when mounting the fuel filler pipe assembly and vent hose that
a minimum of 3” clearance be provided to any body component to prevent contact be-
tween hoses and/or mating parts and that retention be provided to ensure routing and
prevent failure due to wear and fatigue. Filler pipe and vent line must have a gravity fuel
flow to tank at all times; no fuel traps are allowed. Alterations of fuel line routings could
affect the ability of the completed vehicle and are, therefore, not desirable. The complete
fuel system must comply with FMVSS 301.
If additional new hose is required when installing fuel tank filler neck, this hose must be
suitable for use with unleaded fuels or diesel fuel respectively and must allow the vehicle
to meet enhanced evaporative emissions requirements.
The fuel fill inlet pipe assembly attached to the body must be grounded to the frame struc-
ture with the ground strap and fasteners provided in the shipped loose box.
Fuel Lines
Fuel line routing precautions:
D
12 in. minimum clearance to exhaust system is required or a metal shield must
be provided.
D
Fuel lines should be clipped to chassis to prevent chafing. Metal clips must have
rubber or plastic liners.
D
Use corrosion resistant steel tubing with short sections of approved hose to
connect components. Hose-to-tube connections should be clamped for diesel
systems. Steel tube ends should be beaded for hose retention. Fuel supply is
pressurized by an in-tank pump for CPI systems. Coupled hose or nylon
quick-connects must be used. Clamped hose is not acceptable for CPI systems.
All engines require a fuel return system which returns excess fuel from the injection
pump and injector nozzles back to fuel tanks. Care should be taken that these lines are
not blocked nor their hoses pinched. The engine may run poorly or stall if these lines
are restricted or blocked.
All gasoline engine vehicles are equipped with fuel evaporative emission control equip-
ment which is certified to be in compliance with the Federal or applicable California ve-
hicle emission standards. Alterations to fuel tank and metering unit, lines, canister or
canisters, canister filters, canister purge control valves, relay switches, tank auxiliary
vent valve, engine speed controller, or other devices/systems are therefore not allowable
since vehicle adherence to C.A.R.B. and Federal regulations may be affected.
Diesel powered vehicles incorporate water drain provisions in the fuel system. These
valves are only to be opened when siphoning water and contaminants from the fuel sys-
tem.
Fuel Tank
For vehicles with full frames, the tank must have a minimum clearance of 2 in. top, front,
rear and sides to body and other supports.
Tank may be pressurized with nitrogen (Do not use air with fuel in the system) to 1.25
PSI maximum to check for final line leakage or for forcing fuel through the system. Pres-
sures greater than this amount may be detrimental and affect tank durability.
The following statement applies to commercial models only.
Tapping into the main fuel supply line to get fuel for a powered motor generator is not
recommended since this could result in fuel starvation, vapor lock problems and running
the fuel tank dry. It is not permissible to draw fuel from a fuel return line. The fuel meter
assembly has a anti-siphon feature in the return line that prevents fuel from being drawn
out.
The following statement applies to motorhome models only.
The 40, 60 & 75 gallon gasoline tanks will include a fuel draw tube in the top of the tank
assembly. This is provided for body builders to use for generators. The body builder
should remove the pipe plug in this fitting and plumb system to the generator from this
pickup point. Added auxiliary power unit must use the same fuel as the chassis engine
or a separate fuel system will be required.
The use of auxiliary fuel tanks is not recommended. If an auxiliary fuel tank is added,
the alterer must take responsibility for compliance with affected motor vehicle safety
standards. Also, if an auxiliary fuel tank is added to a gasoline-powered vehicle, the fuel
must be drawn through a pipe at the top of the tank (balance line between tanks is not
permitted).
Gasoline fueled vehicles are now equipped with a fuel pump return line. If an auxiliary
tank is added, the tank selector valve must include a return port which returns fuel to the
tank from which the fuel is being drawn.
In gasoline engines the fuel pump is located in the fuel tank. The battery must be discon-
nected before starting any work on the fuel system.
In the use of dual fuel systems, the vehicle operator should strictly adhere to the
manufacturer’s procedures for switching from gasoline to gaseous fuel operation. Im-
proper switching procedures may result in overheating and damage to the exhaust sys-
tem and the vehicle. The gaseous fuel tank should not be mounted in an enclosed area
of the vehicle, such as the passenger compartment, truck, etc., and the system should
be vented to the outside of the vehicle. In addition, vehicles converted to gaseous fuels
should not be stored in enclosed places such as garages. Further, General Motors cau-
Содержание P32
Страница 14: ...PAGE 14 P32 42 CHASSIS P32 42 Rev 12 98 P 30032 General Arrangement Diesel Engine Option L65 6 5L Turbo HO...
Страница 15: ...PAGE 15 P32 42 CHASSIS P32 42 Rev 12 98 P 30032 General Arrangement Diesel Engine Option L65 6 5L Turbo HO...
Страница 32: ...PAGE 32 P32 42 CHASSIS P32 42 Rev 12 98 P 30032 Auto Apply Park Brake Harness Ground...
Страница 33: ...PAGE 33 P32 42 CHASSIS P32 42 Rev 12 98 P 30000 Instrument Cluster Location...
Страница 35: ...PAGE 35 P32 42 CHASSIS P32 42 Rev 12 98 P 30000 Chassis Data...
Страница 36: ...PAGE 36 P32 42 CHASSIS P32 42 Rev 12 98 P 30032 Taperleaf Suspension...
Страница 37: ...PAGE 37 P32 42 CHASSIS P32 42 Rev 12 98 P 30042 Gas Engine 5 7L V8 Option L31...
Страница 38: ...PAGE 38 P32 42 CHASSIS P32 42 Rev 12 98 P 30042 Gas Engine 4 3L V6 Option L35...
Страница 39: ...PAGE 39 P32 42 CHASSIS P32 42 Rev 12 98 P 30032 Gas Engine 7 4L V8 Option L29...
Страница 40: ...PAGE 40 P32 42 CHASSIS P32 42 Rev 12 98 P 30032 Diesel Engine 6 5L Turbo Ho Option L65...
Страница 41: ...PAGE 41 P32 42 CHASSIS P32 42 Rev 12 98 P 30042 Diesel Engine 6 5L HO Option L57...
Страница 43: ...PAGE 43 P32 42 CHASSIS P32 42 Rev 12 98 P 30042 Air Conditioning Fittings...
Страница 44: ...PAGE 44 P32 42 CHASSIS P32 42 Rev 12 98 P 30042 Air Conditioning Compressor Locations...
Страница 45: ...PAGE 45 P32 42 CHASSIS P32 42 Rev 12 98 P 300 32 42 Fuel Filler Neck...
Страница 46: ...PAGE 46 P32 42 CHASSIS P32 42 Rev 12 98 P 30000 Fuel Tank Arrangement...
Страница 47: ...PAGE 47 P32 42 CHASSIS P32 42 Rev 12 98 P 30000 Temporary Fuel Tank Arrangement...
Страница 48: ...PAGE 48 P32 42 CHASSIS P32 42 Rev 12 98 P 30000 Center High Mounted Stop Lamp CHMSL...
Страница 49: ...PAGE 49 P32 42 CHASSIS P32 42 Rev 12 98 P 300 32 42 Lamp Mounting P 30032 P 30042...
Страница 50: ...PAGE 50 P32 42 CHASSIS P32 42 Rev 12 98 P 300 32 42 Instrument Panel Cut Out...
