PROPANE CYLINDERS (TANKS):
WARNING: NEVER use a cylinder not intended engine fuel
applications. DO NOT substitute cylinders that are used with
a barbecue grill, etc.
Propane cylinders are constructed according to ASME and Federal DOT
#4ET20 pressure safety codes. All valves and ttings are UL Listed.
Propane gas is noncorrosive and will not rust the inside of a cylinder. It is
recommended to have propane cylinders inspected regularly during re-ll
by an authorized National LP Gas Association propane dealer. The fuel
cylinder is supplied directly from the manufacturer and is void of propane.
PROPANE CYLINDER CONFIGURATIONS:
Propane cylinders are constructed to function in specic congurations.
The primary conguration options are:
• Propane Withdrawal: Vapor or Liquid
• Cylinder Orientation: Horizontal or Vertical
IMPORTANT: Dierent cylinder congurations are not interchangeable.
All DiamaPro
®
Systems engines use Vapor cylinders, and the orientation
can be either Horizontal or Vertical.
CAUTION: Do not use propane cylinders that are liquid withdrawal
cylinders, such as cylinders for fork lift trucks or other liquid
withdrawal applications.
CAUTION: Always install the propane cylinder in the proper
orientation, which is identied by a label that say “THIS SIDE UP”
or equivalent.
CAUTION: Failure to use a proper cylinder or failure to install cyl-
inder in proper orientation will result in liquid propane withdrawal
and cause damage the regulator.
WARNING:
• Propane cylinders should only be lled by your propane provider or by
individuals who have been properly trained and certied.
• Escaping propane can freeze skin and cause frostbite and damage eye-
sight. Always wear safety gloves and safety glasses when lling propane
cylinders.
• DO NOT overll cylinders.
• DO NOT tamper with cylinder gauges or safety relief valves.
• At time of ll, ensure tank is in operable condition and meets all certi-
cation requirements. Discontinue use of any cylinder that is damaged or
rusted or does not comply with certication requirements. Your propane
service company will assist with compliance.
The maximum ll volume of a propane cylinder is ALWAYS considered
80% of the total cylinder volume to allow for expansion and to ensure
proper vapor withdrawal from the cylinder.
For example, if your propane cylinder is referred to as a “20 lb cylinder”,
this means that when the propane cylinder is 80% full, the weight of the
propane is 20 lb.
Cylinders should be lled in the vertical position.
When lling a propane cylinder, the xed liquid level gauge should be
opened (unscrewed counterclockwise) so it can be used to determine
when propane has reached 80% full. As propane is added during lling,
vapor will escape the small hole in this gauge. When the cylinder reaches
80% full, the escaping propane will turn to liquid propane. When this hap-
pens, the lling should be immediately stopped and the gauge should be
closed (turned clockwise).
CAUTION: Always use HD-5 grade propane to operate this
engine.
CAUTION: Propane cylinders must be purged at the time of the
rst ll. Your propane suppliers should be familiar with this
operation and will provide this service.
10.1. Filling Propane Cylinders
SYMPTOMS OF A NON-PURGED CYLINDER:
• Relief valve opens due to over pressurized cylinder creating hazardous
situation.
• Moisture in the cylinder.
• Powered engine operates initially but shuts down when propane mixture
becomes too lean
STORING & TRANSPORTING PROPANE CYLINDERS:
The NFPA Technical Committee prohibits the storage of propane cylinders
in buildings. Propane cylinders should NOT be stored in buildings used by
the public or frequented by anyone passing through or who is working in
the building. Full or empty, never leave cylinders in small enclosed areas.
Cylinders must be stored in a secure, tamper-proof storage enclosure that
provides safety from accident or vandalism.
Propane cylinders should always be transported either secured to the
machine using cylinder straps, or secured in an upright position during
transportation.
The engine performance, reliability and life are inuenced by many factors,
some external and some strictly associated with the quality of the products
used and with the scheduled maintenance. The following information allow
a better understanding and use of your engine.
ENVIRONMENTAL CONDITIONS:
The operation of a four-stroke endothermic engine is aected by:
a) Temperature:
– Working in low temperatures could lead to a dicult cold starting.
– Working in very high temperatures could lead to a dicult hot starting
due to the evaporation of the fuel either in the carburetor oat chamber
or in the pump.
– In any case, the right kind of oil must be used, according to the operating
temperatures.
b) Altitude:
– The higher the altitude (above sea level), the lower the max power
developed by an endothermic engine.
– When there is a considerable increase in altitude, the load on the ma-
chine should be reduced and particularly heavy work avoided.
OIL:
Use always high quality oils, choosing their viscosity grade according to
the operating temperature.
a) Use only detergent oil classied SJ,SL or higher are acceptable.
b) Choose the SAE viscosity grade of oil from this chart:
– from 5 to 35 °C = SAE 30
– from -25 to + 5 °C = 5W-20 or 5W-30 (Multi-viscosity)
– from -7 to + 35 °C = Synthetic oils 10W-30 or 15W-40 (Multi-viscosity)
c) The use of multi-viscosity oils in hot temperatures will result in higher
than normal oil consumption; therefore, check oil level more frequently.
d) Do not mix oils of dierent brands and features.
e) SAE 30 oil, if used below 5°C, could result in possible engine damage
due to inadequate lubrication.
f) Oil should be at “MAX” mark do not overll. Overlling with oil may
cause:
– Smoking;
– Spark plug or air lter fouling, which will cause hard starting.
AIR FILTER:
A good quality fuel is the major issue for the engine reliability of operation.
The air lter must always be in perfect working order, to prevent debris
and dust from getting sucked into the engine, reducing the eciency and
life of the machine.
a) Always keep the ltering element free of debris and in perfect working
order.
b) If necessary, replace the ltering element with an original spare part.
Incompatible ltering elements can impair the eciency and life of the
engine.
c) Never start the engine without mounting the ltering element properly.
SPARK PLUG:
Not all the spark plugs for endothermic engines are the same!
a) Use only spark plugs of the recommended type, with the right heat
range.
b) Check the length of the thread, because – if too long – it will damage
the engine beyond repair.
c) Make sure that the electrodes are clean and their gap is correct.
11. NEED TO KNOW