FUEL
INJECTION
AND
GOVERNOR
SYSTEMS
lSI
Fuel transfer
pump
u
Camshaft
Ove
rhaul
Internal parts for the fuel transfer pump are not avail-
able. Replace a defective pump; do not attempt to over-
haul it.
1
2. Disconnect the fuel lines (A,
Figure
39) from the fuel
transfer pump.
3. Remove the fuel pump retaining bolts
(8,
Figure 39),
and then remove the pump .
4. Clean any gasket material from the engine and the fuel
pump.
5. Reverse the removal procedure 10 install the fuel trans-
fer pump. Bleed the fuel injection system as described in
this chapter.
NOTE
The transfer
pump
output
port
on 1
GM
and
lGMIO
engines is on the left side with the
pump
mounted on the engine. On all other
engines, the output
port
is on the right
sid
e.
FUEL
LINES
The fuel system utilizes both rubber and steel lines.
When replacing fuel lines, use only lines recommended
by the manufacturer or a diesel engine shop. Purchase the
formed steel fuel lines from a Yanmar dealership. If nee-
essary, a diesel fuel injection shop can fabricate fuel lines.
All lines must be secured by brackets to prevent fractures
or splitting due to vibration.
Inspection
Periodically inspect the fuel lines for leaks and damage,
such as dented or bent steel lines, or cut or abraded rubber
lines. Leaks may be due to loose fittings or damage.
Tighten loose fittings and recheck the leak after operating
the engine. Do not overtighten a fitting to try to stop a
leak; overtightening may damage the fitting threads or the
fuel line scaling surfaces. If tightening does not stop the
leak, disassemble the fuel line and inspect the line and seat
to determine the cause
of
the leak. If sealing surfaces are
damaged, replace the fuel line and,
if
necessary, the fuel
fitting or component.
NOTE
A{ways operate the engine and check
[or
leaks after reconnecting thefuei Iines.
Fuel lines with banjo fittings (A, Figure 40) are
equipped with copper sealing washers (B) on both sides of
the fitting. Copper washers harden with age and will not
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