7
3.8 Engine Oil
The use of good quality, correctly rated engine oil is
very important to the long-term dependability of your
engine, especially when you need it most. Check
the manufacturer’s recommendations for the correct
grade of oil and stick to their recommendations. Do
not use a synthetic, multi-grade motor vehicle oil in
your small engine, it simply is the wrong oil for this
type of engine.
Diesel engines require specific oils designed for
diesel, and the diesel engine on your Firefighter
pump will need a different oil to that used for truck
or motor vehicle engines. Honda and Yanmar offer
their own branded specialty oils to suit their engines
best, but no matter who makes the oil, use the right
grades and stick to trusted brands. Davey include a
label with every engine to advise of the correct oil to
use, which are:
• Honda: SAE 10W-30 mineral oil. For extreme
conditions alternate oil grade may be appropriate
– check manual; and
• Yanmar: MONOGRADE SAE 30, API- CC or CD
mineral oil. For extreme temperatures SAE 40
may be necessary.
Running the engine regularly will help ensure the oil
is distributed around the engine, thus providing the
best lubrication and longer engine life.
3.9 Air cleaners
In a fire emergency you need every ounce of
performance from your pump unit to be available,
and poorly maintained air cleaners won’t help you.
Adequate clean air flowing into the engine at the
right speed and temperature is vital for efficient
combustion:
• Follow the engine manufacturers’ schedule and
instructions for the correct maintenance of the
air cleaner;
• Ensure your engine has access to ample clean
fresh air;
• Be careful changing the air cleaner from the
engine manufacturers original equipment as these
are specially designed for each engine.
3.10 Engine cooling
The temperature at which an engine operates has
a dramatic effect on the power it can deliver. The
higher the ambient or surrounding heat and the
more radiant heat the engine is exposed to, the
lower the performance. The effects of radiant heat
should not be underestimated:
• Protect the engine from radiant heat. Install the
engine in a flame proof enclosure which has some
degree of insulating characteristic. Materials such
as fiber cement sheeting, autoclaved aerated
concrete, or even concrete bricks provide good
fire resistance and thermal insulation. Any
enclosure must allow for adequate flow of clean
air, while at the same time protecting the pump
unit from radiant heat. Make sure the exhaust is
correctly routed out of the enclosure;
• Add a mist spray, or sprays around the pump
enclosure. It will protect the area from embers and
aid cooling;
• Make sure the enclosure is easily accessible for
engine fueling and pump servicing.
3.11 General engine maintenance
Sometimes it’s the little things that lead to problems,
but they are often easy to see if you know what to
look for:
•
Fuel lines:
Check to ensure there is no water in
the carburetor bowl. Make sure any fuel lines have
not degraded over time;
•
Recoil starters:
Ensure they work smoothly.
Check the recoil rope for any signs of wear, if
uncertain, replace them;
•
Service schedules:
Small engines are often not
treated as well as they deserve, oil changes are
the most common item neglected.
4. MODEL VARIANTS
4.1 Roll frames
Many Firefighter pumps are factory fitted with a roll
frames. Other models have roll frames available as
an optional extra. For replacement, or optional roll
frames, contact your local Davey representative, or
Davey by using the contact details at the back of
this manual.
4.2 Muffler deflector
Davey Firefighter pumps using the Honda GX160 and
GX200 engines, include an engine muffler deflector.
Please follow these instructions when fitting:
• Take product out of box and make sure all relevant
parts are in the box, or in the bag containing the
Installation & Operating Instructions. The correct
parts as shown in
figure 4.1
, for fitting the exhaust
deflector are:
> 1 x deflector (A);
> 2 x self-tapping screws (B);
> 1 x muffler guide (GX160 engine only) (C).
Figure 4.1
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