Daewoo G15S-2, Руководство по обслуживанию

Страница: 81 / 88

G420E/G424E
Tier
LP Engine Test And Adjustments 80
3. Apply compressed air, wait for air to exit the hose
barb in the test port, and then connect the
Magnahelic gauge (Figure R13) to the hose barb
using the vacuum hose or vinyl tubing. This
prevents the gauge from reading maximum
pressure due to the large velocity of compressed
air entering the primary chamber.
4. Make sure there is no leakage at any of the
fittings. The static pressure should read between
40-60 inches of water column on the Magnahelic
gauge and maintain a constant pressure for 60
seconds.
5. If the pressure reading begins to increase, a leak
is most likely present at the primary valve, either
the primary valve o-ring or the valve itself. If a leak
is present you will need to disassemble the
primary side of the regulator, repair the cause of
the leak, re-assemble the regulator and test the
primary stage again (See Chapter 7 for
disassembly of the N2001).
6. If the pressure begins to decrease, the secondary
seat is probably not making an adequate seal and
is leaking. If a leak is present you will need to
disassemble the secondary cover of the regulator,
repair the cause of the leak, re-assemble the
regulator and test the primary and secondary
stage again (See Chapter 7 for disassembly of the
N2001).
7. Once the test is successful, re-install the primary
test port plug and check the fittings for leaks (See
Chapter 7 for installation of the N2001).
NOTE
The N2001 Primary stage pressure can
also be tested at idle on a running engine.
The N-2001 primary pressure should be
between 40" and 55" water column at 700
RPM, idle.
WARNING
z
LP gas is highly flammable. To prevent
personal injury, keep fire and flammable
materials away from the lift truck when work
is done on the fuel system.
z
Gas vapor may reduce oxygen available for
breathing, cause headache, nausea,
dizziness and unconsciousness and lead to
injury or death. Always operate the forklift in
a well ventilated area
z
Liquid propane may cause freezing of tissue
or frostbite. Avoid direct contact with skin or
tissue; always wear appropriate safety
protection including gloves and safety
glasses when working with liquid propane
Figure R13