Impco HHI, Service Manual

Page: 15 / 485

15
9. Dispose of oil and filter in a safe manner.
FUEL SYSTEM INSPECTION AND
MAINTENANCE
LPG FUEL SYSTEM
The LPG fuel system installed on this industrial
engine has been designed to meet the emission
standard applicable for the 2007-2009 model
years. To ensure compliance to these standards,
follow the recommended maintenance schedule
contained in this section.
INSPECTION AND MAINTENANCE OF THE
FUEL STORAGE CYLINDER
The fuel storage cylinder should be inspected
daily or at the beginning of each operational shift
for any leaks, external damage, adequate fuel
supply and to ensure the manual service valve is
open. Fuel storage cylinders should always be
securely mounted, inspect the securing straps or
retaining devices for damage ensure that all lock-
ing devices are closed and locked. Check to
ensure that the fuel storage cylinder is positioned
with the locating pin in the tank collar on all hori-
zontally mounted cylinders this will ensure the
proper function of the cylinder relief valve.
When refueling or exchanging the fuel cylinder,
check the quick
fill valve for thread damage. Also
verify O-ring is in place and inspect for cracks,
chunking or separation. If damage to the o-ring
is found, replace prior to
filling. Check the se r-
vice line quick coupler for any thread damage.
IMPORTANT:
When refueling the fuel cylinder, wipe both the
female and male connection with a clean rag prior
to
filling to prevent dust, dirt and debris from being
introduced to the fuel cylinder.
INSPECTION AND REPLACEMENT OF THE
LPG FUEL FILTER
The LPG system on this emission certi fied engine
utilizes an in-line replaceable fuel filter el ement.
This element should be replaced, at the intervals
speci
fied in the recommended maintenance sch e-
dule. When inspecting the fuel filter check the
following:

Check for leaks at the inlet and outlet fittings,
using a soapy solution or an electronic leak
detector and repair if necessary.

Check to make sure filter is securely mounted.

Check filter housing for external damage or
distortion. If damaged replace fuel filter.
REPLACING THE LPG FUEL FILTER:
1. Move the equipment to a well ventilated area
and verify that sparks, ignition and any heat
sources are not present.
2. Start the engine.
3. Close the LPG tank valve.
4. When the engine stalls when it runs out of
fuel, turn the ignition key to the OFF position
and disconnect the battery negative cable.
IMPORTANT:
A small amount of fuel may still be present in the
fuel line. Use gloves and proper eye protection
to prevent burns. If liquid fuel continues to
flow
from the connections when removed, make sure
the manual valve is fully closed.
5. Slowly loosen the inlet fitting and disconnect.
6. Slowly loosen the outlet fitting and disconnect.
7. Remove the filter housing form the equipment.
8. Check for contamination.
9. Tap the opening of the
filter on a clean cloth.
10. Check for debris.
11. Check canister for proper mounting direction.
12. Reinstall the
filter housing to the equipment.
13. Tighten the inlet and outlet fittings to specific a-
tion.
14. Open the LPG tank valve.
IMPORTANT:
The fuel cylinder manual valve contains an
Excess Flow Check Valve. Open the valve slowly
to prevent activating the Excess Flow Check
Valve.
15. Check for leaks at the inlet and outlet fittings,
and the filter housing end connection using a
soapy solution or an electronic leak detector, if
leaks are detected make repairs.