Maintenance - Hitachi RB 24EAP Instruction Manual

MAINTENANCE
MAINTENANCE, REPLACEMENT OR REPAIR
OF THE EMISSION CONTROL DEVICES AND
SYSTEMS MAY BE PERFORMED BY ANY
NONROAD ENGINE REPAIR ESTABLISHMENT
OR INDIVIDUAL.
Carburetor adjustment (Fig. 10)
In the carburetor, fuel is mixed with air. When the
engine is test run at the factory, the carburetor is
basically adjusted. A further adjustment may be
required, according to climate and altitude. The
carburetor has one adjustment possibility:
T = Idle speed adjustment screw.
Fig. 10
Idle speed adjustment (T)
Check that the air filter is clean. If adjustment is
required, turn IDLE speed Adjustment Screw (T)
close (clockwise) to increase engine speed, open
(counterclockwise) to decrease engine speed.
Standard Idle rpm is 2800-3200rpm.
RECOMMENDATION:
CARBURETOR ADJUSTMENT NEEDS THE SKILL
OF EXPERIENCED OR WELL TRAINED PEOPLE,
IR IS RECOMMENDED TO TAKE THE UNIT TO
HITACHI DEALER.
Air filter (Fig. 11)
The air filter must be cleaned from dust and dirt in
order to avoid:
O Carburetor malfunctions
O Starting problems
O Engine power reduction
O Unnecessary wear on the engine parts
O Abnormal fuel consumption
Remove the air cleaner cover by pushing and pulling
back the tab on the top.
Clean the air filter daily or more often if working in
exceptionally dusty areas.
I English
Fig. 11
Cleaning the air filter
Open the air filter cover and the filter. Rinse it in
warm soap suds. Check that the filter is dry before
reassembly. An air filter that has been used for some
time cannot be cleaned completely. Therefore,
it must regularly be replaced with a new one. A
damaged filter must always be replaced.
Fuel filter (Fig. 12)
Drain all fuel from fuel tank and pull fuel filter line
from tank. Pull filter element out of holder assembly
and rinse element in warm water with detergent.
Rinse thoroughly until all traces of detergent are
eliminated. Squeeze, do not wring, away excess
water and allow element to air dry.
Fig. 12
NOTE
If element is hard due to excessive dirt buildup,
replace it.
Spark plug (Fig. 13)
The spark plug condition is influenced by:
O An incorrect carburetor setting
O Wrong fuel mixture (too much oil in the gasoline)
O A dirty air filter
O Hard running conditions (such as cold weather)