Ski-Doo Formula S 1998, Shop Manual

Page: 121 / 338

Section 04 ENGINE
Subsection 06 (OIL INJECTION SYSTEM)
04-06-5
Reconnect banjo fittings with a washers on each
side, start engine and run at idle while holding the
pump lever in fully open position. Oil columns
must advance into small oil lines.
TYPICAL — ENGINE AT IDLE
1. Oil columns advancing
2. Washer on each side
3. Fully open position
If not, remove pump assembly and check the
pump gear and drive shaft (if applicable) for de-
fects, replace as necessary. Test pump as de-
scribes below.
NOTE: Through normal use, oil level must not
drop in small tubes. If oil drops, verify check valve
operation in banjo fittings. Replace as necessary.
Test Bench
Connect a hose filled with injection oil to main line
fitting. Insert other hose end in an injection oil
container. Using a counterclockwise rotating drill
rotate pump shaft. Oil must drip from outer holes
while holding lever in a fully open position. If not
replace pump.
TYPICAL
1. Fully open position
2. Counterclockwise rotating drill
3. Main line
Banjo Fitting
Inside the banjo fitting, there is a ball that acts as
a check valve. To verify this check valve, proceed
the same as for checking pump operation on vehi-
cle. First unbolt banjo fitting from pump. After re-
starting the engine, check that a clear section in
small oil line is present. Reconnect banjo fitting.
Run engine at idle. Oil column must advance. If
the check valve is faulty, oil column will go back
and forth. Replace if so.
A15C17A
1
2 3
A15C18A
2
1
3