Air Cleaner - Onan T260G Service Manual

3.
Connect a vacuum gauge to fuel pump inlet using a
4. Start engine and allow to idle. for at least five
seconds. Record vacuum gauge reading.
piece of fuel hose with clamps.
5. Move throttle control to high idle position. Wait at
least five seconds and record vacuum gauge
reading.
6. Shut engine off and remove vacuum gauge hose
from fuel pump inlet. Connect fuel inlet line to fuel
pump.
i
7. Remove fuel outlet line from fuel pump.
Spilled fuel can ignite and cause
!
WARNING
serious personal injury or death.
Thoroughly clean-up any spilled fuel.
8. Connect a pressure gauge to fuel pump outlet using
a piece of fuel hose with clamps.
9. Start engine and allow to idle for at least five
seconds. While holding pressure gauge level with
pump outlet, record pressure gauge reading.
10. Move throttle control to high idle position and allow
engine to run for at least five seconds. While holding
pressure gauge level with pump outlet, record
pressure gauge reading.
11. Shut engine off and remove pressure gauge hose
from fuel pump outlet. Connect fuel outlet line to fuel
pump.
Repair or replace the fuel pump if test readings are not
within the values specified in TABLE 1.
TABLE
1
PULSE PUMP TEST SPECIFICATIONS
Pump *outlet
Pressure
(Minimum)
Low Idle
of mercury
1.7 psi
2.6 inches
High Idle
of mercury
1.7 psi
2.6 inches
Fuel Pump Repair
This section applies only to Facet fuel pump. The Nikki
fuel pump is not repairable; replace unit if test readings
are not within the values specified in TABLE 1.
1. Remove the vacuum and fuel lines. Inspect the
lines for wear, cracking or brittleness. Replace as
necessary.
2. To' insure correct alignment when reassembling,
scribe a line across the outer pump parts on each
end of the pump.
3. Holding the pump carefully, remove the assembly
screws (Figure 5).
4.
Carefully pull apart the pump sections and check
for worn or damaged parts. Replace with new
parts where necessary or install pump repair
kit.
5. Check and unclog if necessary the small diaph-
ragm air bleed hole located behind the pump
diaphragm in the pump base.
CAUTION
h o l e
A clogged diaphragm air bleed
ole can cause diaphragm wear
and seal damage while inhibiting pump operation.
6. Replace gaskets and reassemble pump. Reinstall
assembly screws, checking the scribe marks for
proper alignment. Reinstall fuel and vacuum lines
and clamps.
WARNING
and reinstalling the pump. Im-
Use care when reassembling
proper parts alignment or misconnected fuel lines
can result in leaking fuel, creating a serious fire
hazard.
AIR CLEANER
If air cleaner becomes too dirty,
to run' properly. Symptoms: Loss of power, flooding,
hard starting and overheating.
engine will not receive sufficient air
Engine is equipped with a paper element. If the
engine is equipped with polyurethane precleaner, it
must be removed, cleaned and oiled every25 hours of
operation, or more under extremely dusty conditions.
1. To clean precleaner, wash in water and detergent
(Figure 6). Remove excess water by squeezing like
a sponge and allow to dry thoroughly. Distribute two
tablespoons of SAE
30
engine oil evenly around the
precleaner. Knead into and wring excess oil from
precleaner.
7-5