Service manual

G420F(FE) Service Manual 321 Appendix
LPG Fuel Tanks
The two styles of LPG storage containers available
for industrial use and lift truck applications are
portable universal cylinders and permanently
mounted tanks. Portable universal cylinders are
used primarily for off-highway vehicles and are
constructed in accordance with the DOT-TC (United
States Department of Transport – Transport
Canada). The cylinders are referred to as universal
because they can be mounted in either a vertical or
horizontal position (Figure 4).
NOTE: A 375-psig, relief valve is used on a DOT
forklift tank. The relief valve must be replaced with a
new valve after the first 12 years and every 10 years
thereafter.
The tank must be discarded if the collar is damaged
to the point that it can no longer protect the valves. It
must also be replaced if the foot ring is bent to the
point where the tank will not stand or is easily
knocked over.
Installing LPG Fuel Tanks
When installing a tank on a lift truck, the tank must
be within the outline of the vehicle to prevent
damage to the valves when maneuvering in tight
spaces. Horizontal tanks must be installed on the
saddle that contains an alignment pin, which
matches the hole in the collar of the tank. When the
pin is in the hole, the liquid withdrawal tube is
positioned to the bottom of the tank. A common
problem is that often these guide-pins are broken off,
allowing the tank to be mounted in any position. This
creates two problems. 1). When the liquid
withdrawal tube is exposed to the vapor space, it
may give a false indication that the tank is empty,
when it actually is not. 2). The safety relief valve
may be immersed in liquid fuel. If for any reason the
valve has to vent, venting liquid can cause a serious
safety problem,
CAUTION
When empty, the tank is exchanged with a pre-
filled replacement tank. When exchanging a tank,
safety glasses and gloves should be worn.
LPG Fuel Tank Components
(1) Fuel Gauge (2) 80% Stop Bleeder
(3) Pressure Relief Valve
(4) Service Valve (Tank end male coupling) (5) Filler Valve
(6) Alignment Pin
(7) Vapor Withdrawal Tube (Only used with Vapor Withdrawal)
(8) 80% Limiter Tube (9) Liquid Withdrawal Tube
(10) Foot Ring (11) Fuel Level Float (12) Collar
Figure 4
Figure 5
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4
5
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9