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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.
6. Clamp both Coolant Hoses as close to the
Regulator as possible.
7. Remove Coolant hoses.
The coolant may be hot. Use caution when
removing hose(s) to prevent contact.
8. Remove the Bolt securing the Regulator.
INSTALLATION PROCEDURE
1. Secure Regulator with Bolt. Torque to 12.5
ft.lbs. (17 Nm).
2. Attach the LPG Fuel Line at the flare fitting
attached to the Shutoff Valve.
3. Reconnect LPG Fuel Line (to Fuel Rail).
4. Connect Coolant Lines secure with hose
clamps. Remove clamps from hoses (if used
during removal).
5. Connect the fuel supply line (from tank).
6. Slowly open LPG Tank Valve.
IMPORTANT:
The fuel cylinder manual valve contains an
Excess Flow Check Valve. Open the manual
valve slowly to prevent activating the Excess Flow
Check Valve.
7. Reconnect negative battery cable. Turn igni-
tion key to ON and check for leaks at the inlet
and outlet fittings using a commercial grade
soapy solution or an electronic leak detector.
If leaks are detected make repairs.
8. Start engine and check for fuel and coolant
leaks. If leaks are detected make repairs.
9. Check for MIL illumination.
10. Run engine to normal operating temperature
and turn key to OFF.
11. Check coolant level and add coolant if neces-
sary.
XII. CHECKING/DRAINING OIL BUILD-UP IN
THE LOW PRESSURE REGULATOR
During the course of normal operation oil or
“heavy ends” may build inside the secondary
chamber of the Regulator. These oil and heavy
ends may be a result of poor fuel quality, conta-
mination of the fuel, or regional variation of the
fuel make up. A significant build up of oil can af-
fect the performance of the secondary diaphragm
response. The Recommended Maintenance
Schedule found in this section recommends that
the oil be drained periodically. This is the mini-
mum requirement to maintain the emission
warranty. More frequent draining of the Regulator
is recommended for special situation where subs-
tandard fuel may be a problem. IMPCO
recommends the Regulator be drained at every
engine oil change if contaminated or substandard
fuel is suspected or known to be have been used
or in use with the emission complaint fuel system.
This is known as special maintenance, and failure
to follow this recommendation may be used to de-
ny a warranty claim.
IMPORTANT:
Draining the Regulator when the engine is warm
will help the oils to flow freely and permit easier
removal from the Regulator.
To drain the Regulator, follow the steps below:
1. Move the equipment to a well ventilated area
and ensure no external ignition sources are
present.
2. Turn off LPG Valve and Relieve the LPG fuel
system pressure. Refer to XVIII. LPG FUEL
SYSTEM PRESSURE RELIEF.
3. Disconnect Negative battery cable.
A small amount of fuel may still be present in
the fuel line. Use gloves and proper eye pro-
tection to prevent burns. If liquid fuel
continues to flow from the connections when
removed, make sure the manual valve is fully
closed.
4. Remove the plug on the Regulator under the
lower coolant port.
5. Place a small receptacle in the engine com-
partment to catch any liquid that may come
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