Fuel Additivcs; Spares; Primary (Blecding/The Fuel System); Air Cleaner/Silencer - Universal M3-20A Operator's Manual

FUEL SYSTEM
FUEL ADDITIVES
If fungus or bacteria is causing fuel problems, you should
have an authorized dealer correct these problems. Then use a
diesel fuel biocide
to
sterilize the fuel (follow the manufac-
turer's instructions).
SPARES
While the likelihood of having to service the fuel system at
sea is slim, the possibility does exist. Therefore, we recom-
mend that banjo washers, injector seat washers, and a fuel fil-
ter be earned on board at all times. Purchase needed spares
from your local UNIVERSAL dealer or distributor. If a leak
should develop at a banjo washer that cannot be corrected by
a simple tightening of the fitting, replace the sealing washer.
PRIMING (BLEEDING) THE FUEL SYSTEM
The on-engine fuel system is virtually self priming. Under
ordinary circumstances the engine's electric fuel lift pump,
which is energized by the key switch/preheat button, will
supply a continuous flow of fuel from the tank. This fuel is
drawn through the fuel/water separator to the engine lift
pump, the primary spin-on fuel filter, and the injection pump.
A
WARNING:
Do not allow smoking
or
open flames
near the fuel system when servicing. Also provide proper
ventilation.
TO FUEL FILTER
FROM FUEL TANK
1 L _ - - - CHECK AND CLEAN
filTER AT OIL CHANGE
TO FUEl FILTER
FUEL LIFT PUMPS
- FROM FUEL TANK
19
If it becomes necessary to bleed air from the system, use the
following procedure:
Loosen all the high pressure injector lines (not injectors)
and
crank the engine starter motor; as fue I spurts from between
the nut and the line, tighten the injector Jines in sequence and
then tighten the bleed screw.
NOTE:
Do not attempt this procedure on a hot engine.
A
WARNING:
Always wear protective clothing, safety
glasses and gloves when bleeding high pressure injector
lines.
fiLTER ELEMENT
Air Cleaner/Silencer
CANISTER
AIR CLEANERISILENCER
(ENGINE M·3S8 SHOWN)
Some UNIVERSAL engines use a replaceable air filter cle-
ment wrapped around a metal canister. This element can be
removed and brushed
off
or cleaned with an air hose. When
it become too contaminated it can be replaced. The canister
with its interior element should also be removed and cleaned
periodically. Simply wash the assembled unit in a non*flarn*
mabIe cleaning solvent. Use this same cleaning procedure for
other UNIVERSAL air cleaners that use a similar type canis-
ter.
NOTE:
To operate efficiently a diesel engine must intake a
continuous volume of clear air. Hard starting, an erratic idle,
alld black exhaust smoke are all symptoms of a restricted air
intake.