Suzuki Intruder 1978 Service Manual page 132

Figure 3-69
1. Oil Pump
2. Gears
Figure 3-70
Inspection
The check valve is needed to prevent oil from
bleeding back to the pump when the engine stops.
The check valve retains oil in the hose between
the oil pump and cylinder for when the engine
restarts . A small capacity, hand held pressure
tester is recommended for testing the check valves.
Only 3 to 6 PSI
is required to move the check valve
off its seat. If the valve does not check out good
replace the valve . (See Figure 3-71.)
Do not use high pressure compressed air
on the check valve. High pressure air will
damage the valve which will result in
engine failure.
o
~DD
1. Spring
2. Steel Ball
Figure 3-71
Check the gears, bearings and seals for wear or
damage a nd replace if necessary.
Figure 3-72 shows the oil flow through the crank-
case to the center main bearings and to the big
end of the connecting rod .
Check the gearcase vent hole directly above the
sight glass to be sure it is free from obstruction to
ensure proper seal operat ion . (See Fig ure 3-73.) If
this hole is plugged, it could permit the gearcase
oil to be sucked into the crankcase through the
seal between the gearcase and crankcase. Loss of
this oil would result in gear and bearing failure .
OIL INJECTION SYSTEM
3 -59