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/9%XX9X Check the service line quick coupler for any thread dam-
age.
The maintenance of an engine and related components are
critical to its operating performance and lifespan. Indus- %/=VW9X
trial engines operate in environments that often include When refueling the fuel cylinder, wipe both the
hot and cold temperatures and extreme dust. Although the female and male connection with a clean rag
recommended maintenance schedule is listed in this sec- prior to filling to prevent dust, dirt and debris
tion, environmental operating conditions and additional from being introduced to the fuel cylinder.
installed equipment may require more frequent inspection
and servicing. The owner and/or service agent should
review the operating conditions of the equipment to deter-
mine the inspection and maintenance intervals.
X%XW9X^9V%G
! '9WX%X
V%GWV//XU9%VX
When performing maintenance on the engine,
turn the ignition OFF and disconnect the bat- Use SAE 5W-20 oil that has the American Petroleum
tery Negative cable to avoid injury or damage to Institute’s (API) Starburst logo, which shows that the oil
the engine. meets the ILSAC GF-5 requirements:

XW9G/9%XX9X
Prior to each use, the engine should be inspected for any
type of fluid leaks by a visually inspecting the engine as
well as the surface on which the vehicle is parked. Check
the coolant hose, radiator and coolant level. Also check
the engine oil level and all drive belts for any signs of
damage. Inspect fuel lines for any leaks and to make sure
all connections are secure. The inspection should include
the exhaust system for signs of damage or loose connec-
API logo
tions in the piping.

! 9 %VX
%X=%VX9XU/9%XX9XV> When refueling the fuel cylinder, wipe both the
<> GVW9]G%XUW female and male connection with a clean rag
prior to filling to prevent dust, dirt and debris
The fuel storage cylinder should be inspected daily or at from being introduced to the fuel cylinder.
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 ]X<%V%G
straps or retaining devices for damage ensure that all lock-
Synthetic oils have been available for use in industrial
ing devices are closed and locked. Check to ensure that
engines and may offer advantages in cold and hot temper-
the fuel storage cylinder is positioned with the locating
atures. The use of synthetic oils does not permit the exten-
pin in the tank collar on all horizontally mounted cylin-
sion of oil change intervals.
ders to 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.

/ / &J[GK>\KK
 [GK>\, 

<^%X$>%GG%XX%XV%GG?G <9X%XX%XV%G
%/=VW9X %/=VW9X
Care must be taken when checking engine oil When changing the oil, always change the oil fil-
level. Oil level must be maintained between the ter.
“ADD” mark and the “FULL” mark on the dip-
stick. To ensure that you are not getting a false 1. Start the engine and run until it reaches normal oper-
reading, make sure the following steps are ating temperature.
taken before checking the oil level.
%/=VW9X
1. Stop engine. Change oil when engine is warm and the old oil
2. Allow approximately five minutes for the oil to drain flows more freely.
back into the oil pan.
2. Stop engine
3. Remove the dipstick. Wipe with a clean cloth or
3. Remove drain plug and allow the oil to drain.
paper towel and reinstall. Push the dipstick all the
way into the dipstick tube. 4. Remove and discard oil filter and its sealing ring.
4. Remove the dipstick and note the amount of oil on 5. Coat sealing ring on the new filter with clean engine
the dipstick. The oil level must be between the oil, wipe the sealing surface on the filter mounting
“FULL” and “ADD” marks. surface to remove any dust, dirt or debris. Tighten
filter securely (follow filter manufacturer’s instruc-
tions). Do not over tighten.
6. Check sealing ring on drain plug for any damage,
replace if necessary, wipe plug with clean rag, wipe
pan sealing surface with clean rag and reinstall plug
into the pan. Tighten to the OEM specification.
7. Fill crankcase with oil. The Ford 2.5L engine takes
5.1L (5.4 quarts) without oil filter and 5.4L (5.7
quarts) with oil filter.
Engine Oil Dip Stick (Typical) 8. Start engine and check for oil leaks. Turn the engine
OFF.
5. If the oil level is below the “ADD” mark reinstall the
dipstick into the dipstick tube and proceed to Step 6. 9. Check oil level and add more oil if necessary.
If the oil level is at the “FULL” level, replace the Dip 10. Dispose of oil and filter in a safe and responsible
Stick. manner.
6. Remove the oil filler cap from the valve cover.
7. Add the required amount of oil to bring the level up
to, but not over, the “FULL” mark on the dipstick.
Reinstall the oil filler cap to the valve rocker arm
cover and wipe any excess oil clean.

! 9 %VX
An overfilled crankcase (oil level being too high)
can cause an oil leak, a fluctuation or drop in oil
pressure. When overfilled, the engine crank-
shafts splash and agitate the oil, causing it to
aerate or foam.

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 [GK>\, 

X%X"G VVG9X
The engine installed in this equipment uses two belts to
drive the water pump, fan, alternator and additional ! '9WX%X
pumps or devices. It is important to note that the drive Alcohol or Methanol based anti-freeze or plain
belts are an integral part of the cooling and charging sys- water are not recommended for use in the cool-
tem and should be inspected according to the maintenance ing system at anytime.
schedule in this section. When inspecting the belts check
for:
• Cracks
! '9WX%X
Do not remove the cooling system pressure cap
• Chunking of the belt
(radiator cap) when the engine is hot. Allow the
• Splits engine to cool and then remove the cap slowly to
• Material hanging loose from the belt allow pressure to vent. Hot coolant under pres-
• Glazing or hardening sure may discharge violently.

If any of these conditions exist the belt should be replaced Check coolant level in coolant recovery tank and add
with the recommended OEM replacement belt. coolant as required.

%/=VW9X %/=VW9X
The use of “belt dressing” or “anti-slipping Use only 50/50 mix of Boron-free antifreeze
agents” on belts is not recommended. with distilled water. Do not add plain water.
Replace coolant per the recommended schedule.

%/=VW9X
Only replace coolant with same color originally
X%XVVG%X]/ included or shipped with the engine. Do not mix
It is important that the cooling system of the engine be coolant.
maintained properly to ensure proper performance and
%/=VW9X
longevity.
The manufacturers of the engine and fuel sys-
XV tem do not recommend the use of “stop leak”
The LPG vaporizer is connected to the cooling additives to repair leaks in the cooling system. If
system and the fuel system may be adversely leaks are present the radiator should be
affected by low coolant levels and restricted or removed and repaired or replaced.
plugged radiator cores. Therefore, the cooling
system must be maintained according to the
recommend maintenance schedule in this sec- X%XGW%9G]/
tion, including:
The engine’s electrical system incorporates computers to
• The regular removal of dust, dirt and debris from control various related components. The electrical system
the radiator core and fan shroud. connections and ground circuits require good connections.
• Inspection of coolant hoses and components for Follow the recommended maintenance schedule in this
leaks, especially at the radiator hose connections. section to maintain optimum performance. When inspect-
Tighten hose clamps if necessary. ing the electrical system check the following:
• Check radiator hoses for swelling, separation, • Check Positive and Negative cables for corrosion,
hardening, cracks or any type of deterioration. If rubbing, chafing, burning and to ensure tight con-
any of these conditions exist the hose should be nections at both ends.
replaced with a recommended OEM replacement • Check battery for cracks or damage to the case and
part. replace if necessary.
• Inspect the radiator cap to ensure proper sealing.

/ / &J[GK>\KK
 [GK>\, 

• Inspect engine wire harness for rubbing, chafing, XV

pinching, burning, and cracks or breaks in the wir- The LPG vapor filter can be inspected and pos-
ing. sibly cleaned, however, the LPG liquid filter is
• Verify that engine harness connectors are correctly not serviceable and can only be replaced.
locked in by pushing in and then pulling the con- Refer to Section 8. “Servicing the Fuel System”,
nector halves outward. Regulator, for instructions on inspecting and
• Verify that all electrical components are securely replacing the filters.
mounted to the engine or chassis.
%/=VW9X
• Verify that the MIL, charging, and oil pressure
The Pressure Regulator components have been
lights illuminate momentarily during Key On.
specifically designed and calibrated to meet the
fuel system requirements of the engine. If the
Regulator fails to operate or develops a leak, it
should be repaired or replaced with the OEM
=9W^=G  recommended replacement parts.

Replace spark plugs at the required intervals per the rec- %/=VW9X
ommended maintenance schedule. IMPORTANT: Use Always inspect the LPG fuel system for leaks
only Ford specification spark plugs (part number CYFS- after performing service. Check for leaks at the
12Y-PC5). Spark plugs should be gapped 0.049-0.053 fittings of the serviced or replaced component.
inches (1.25-1.35mm). Use a commercially available liquid leak detec-
tor or an electronic leak detector. When using
both methods, use the electronic leak detector
first to avoid contamination by the liquid leak
> G]/%X=%VX detector
9XU/9%XX9X • Check for any fuel leaks at the inlet and outlet fit-
The LPG fuel system installed on this industrial engine tings of all fuel lines.
has been designed to meet the emission standard applica- • Check for any fuel leaks in the regulator body.
ble for the 2015 model year. To ensure compliance to • Check for any fuel leaks around the fuel rail and
these standards, follow the recommended maintenance injectors.
schedule contained in this section. • Check to ensure the Regulator is securely mounted
and the mounting bolts are tight.
• Check the Regulator for external damage.
• Check the Regulator electrical connections to
9%W%X9^>%GW ensure the connector is seated and locked.
Regular inspection of the air intake filter is necessary to
ensure proper airflow to the engine. In some cases, light ! 9 %VX
dust covering the air filter can be removed using com-
pressed air. If the dirt or contaminants cannot be removed The LPG fuel system operates at pressure up to
or if the airfilter is damaged in any way, it must be 21.5 bar (312 psi). To minimize personal injury,
replaced. relieve the LPG fuel system pressure before ser-
vicing the LPG fuel system components. Refer
to the Fuel Pressure Relieve Procedure in Ser-
vicing the Fuel System in this manual.
%X=%VXV><> G>%GW
The LPG system on this engine utilizes two filters: a liq- ! '9WX%X
uid LPG filter and a dry filter for LPG vapor. Both filters
Residual vapor pressure will be present in the
are components of the LPG regulator and require replace-
fuel system. Ensure the work area is well venti-
ment per the recommended maintenance schedule.
lated before disconnecting any fuel line.

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 [GK>\, 

%/=VW9X
! 9 %VX The exhaust system on this emission certified
Never use an open flame of any type to check engine contains Heated Exhaust Gas Oxygen
for LPG leaks. Sensors (HEGOs) which provides feed back to
the ECM on the amount of oxygen present in
the exhaust stream after combustion. HEGO
voltages vary, but they are generally less than
9%W%XU %VX$?9 / one volt. Therefore, it is imperative that all
To maintain proper air/fuel ratio, the air induction system, HEGO electrical connections remain secured
air intake and vacuum hoses also require periodic inspec- and air tight.
tion (refer to LPG CERTIFIED ENGINE MAINTE-
NANCE REQUIREMENTS table for the recommended
interval page 2-2).
 W%X<V9XU
Inspect all air intake connections between the air inlet fil- GW%9G'%W
ter and engine, including the throttle body and intake
manifold. Also inspect all vacuum hoses, ensuring they All hoses (fuel, vacuum, coolant, air, etc.) should be peri-
are securely connected and are not loose. Inspect the vac- odically inspected to ensure they are securely mounted,
uum hoses for breaks, hardening, cracks or pinching. strain relieved and not rubbing against other components.
Vibration and strain or tension can create a premature fail-
ure. Similarly, electrical wires may become subject to fail-
ure due to strain and vibration and over time, break.
_<9 ]/9XU
99G]%VX?WW
When inspecting the Exhaust system check the following:
• Listen for excessive noise during normal engine
operation that might indicate an exhaust leak.

! 9 %VX
Exhaust system components may be extremely
hot and contact with any of these components
may cause severe burns. Allow the engine to
cool prior to coming in contact with the engine
or any exhaust component.

• Examing the exhaust manifold at the cylinder head

for leaks and verify that all retaining bolts and
shields are in place.
• Inspect manifold to exhaust pipe connections and
fasteners to ensure they are tight and that there are
no exhaust leaks. Repair if necessary.
• Visually inspect converter to ensure muffler and/or
catalytic converter is securely mounted and tail
pipe is properly directed away from the vehicle and
its operator.
• Inspect the HEGO electrical connections and
inspect the wires for any damage or burning of the
insulation. Verfiy they are properly routed to pre-
vent contact with any surfaces that might burn or
chaf the wires.

/ / &J[GK>\KK