Impco HHI - Page 18

18
LPG
& BI
-
FUEL
CERTIFIED ENGINE MAINTENANCE REQUIREMENTS
Perform the following maintenance on the engine at the hours indicated and at equivalent hour intervals thereafter.
Interval Hours
Daily 1000 1500 2000 2500 3000 3500 4000 4500 5000
General Maintenance Section
Visual check for fluid leaks
X
Check engine oil level
X
Check coolant level
X
Change engine oil and filter
Every 100 hours or 60 days of operation
Check LPG
system for leaks Prior to any service or maintenance activity
Inspect accessory drive belts for cracks, breaks, splits or glazing
X X X X X
Inspect
electrical system wiring for cuts, abrasions or corrosion X X
Inspect all vacuum lines and fittings for cracks, breaks or harden
ing X X
Engine Coolant Section
Clean debris from radiator core
Every 100 hours or 60 days of operation
Change coolant
X X X X X
Inspect coolant hoses for cracks, swelling or deterioration
X X X X X
Engine Ignition System
Inspect Battery case for leaks or damage
X X X X X
Inspect battery cables for damage corrosion or contamination
X X X X X
Check all electrical connector retainer locks
X X X X X
Replace spark plugs
X X
Fuel System Maintenance
Inspect air cleaner
Every 200 hours, or every 100 hours in dusty environment
Replace filter element
Annually, or Bi-annually in dusty environments
Replace PCV Valve
X
Replace inline LPG fuel filter
X X X X X
Check LPG shut off solenoid valve function
X X
Replace fuel filter
(Bi-fuel only) X X X X X
Inspect
Shut-off Valve for leaks and closing X X
Leak check
fuel lines X X
Check air induction for leaks
X X
Check manifold for
vacuum leaks X X
Check fuel injector s& rail for leaks (Bi-fuel only) X X
Replace fuel injectors (Bi-fuel only) X
Inspect
EPR for coolant leaks
Annually or every 2000 hours
Drain
EPR oil build up
Every 2500 hrs
Engine
Exhaust System
Inspect exhaust manifold for leaks
X X
Inspect exhaust piping for leaks
X X
Check HEGO sensor connector and wires for burns, cuts or damage
X X
Inspect catalyst for mechanical damage
X X
This maintenance schedule represents the manufacturer’s recommended maintenance intervals to maintain proper en-
gine/equipment function. Federal, State, or Local regulations may require additional or more frequent inspection or maintenance
intervals than those specified above. Check with the authority having jurisdiction for details. Note that LPG engines are designed to
operate on HD–5 or HD–10 specification LPG fuel. Fuel other than HD–5 or HD–10 may cause harm to the engine’s emission
control system and a warranty claim may be denied on this basis if operators can readily find the proper fuel*. Use of any other fuel
may result in your engine no longer operating in compliance with CARB or EPA emissions requirements.
*Not Applicable in the state of California.