BOMBARDIER ski-doo Tundra Scandic 2004 Series, Shop Manual

Page: 189 / 427

Section 04 ENGINE
Subsection 07 (OIL INJECTION SYSTEM)
MMR2004-116_04_07A.FM
04-07-9
1. Lock washer
2. Plastic elbow fastened and fully inserted
3. Pump casting mark
4. Second mark aligned or below
5. First mark
6. Bleeder screw
A. 5 N•m (44 lbf•
in )
B. 0 to 1 mm (0 to .039 in)
CAUTION: Proper oil injection pump adjust-
ment is very important. Any delay in the open-
ing of the pump can result in serious engine
damage.
BLEEDING OIL LINES
Bleed main oil line (between tank and pump) by
loosening the bleeder screw
no. 8 until air has es-
caped from the line. Add injection oil as required.
Reinstall all parts.
Bleed the small oil lines between pump and en-
gine by running engine at idle while holding the
pump lever in fully open position.
NOTE: Make a J hook out of mechanical wire to lift
the lever.
CHECKING OPERATION
Oil Pump
On Vehicle
NOTE: Main oil line must be full of oil. See bleed-
ing procedure above.
Lift rear of vehicle and support with a mechanical
stand. Disconnect small oil lines from pump. Start
engine and stop it as soon as it fires.
Check that oil in small oil lines has been sucked up
(this will be indicated by a clear section of small oil
lines). Repeat the procedure until this condition is
attained.
Reconnect small oil lines, start engine and run at idle
while holding the pump lever in fully open position.
Oil columns must advance into small oil lines.
If not, remove pump assembly and check the pump
gear and drive shaft (if applicable) for defects, replace
as necessary. Test pump as describes below.
NOTE: Through normal use, oil level must not drop
in small oil lines. If oil drops, verify check valve op-
eration in injection nozzle. Replace as necessary.
Test Bench
Connect a hose filled with injection oil to supply line
fitting. Insert other hose end in an injection oil con-
tainer. Using a clockwise rotating drill, rotate pump
shaft. Oil must drip from outer fittings while holding
lever in a fully open position. If not replace pump.
2, Check Valve
For engine 593, check valve is part (built-in) of in-
jection nozzle.
For engines 277, 443 and 552, check valve is part
(built-in) of banjo fitting.
To verify this check valve, proceed the same as for
checking pump operation on vehicle. First unplug
oil line from injection nozzle. After restarting the
engine, check that a clear section in small oil line
is present. Reconnect oil line.
Run engine at idle. Oil column must advance. If
the check valve is faulty, oil column will go back
and forth. Replace if so.

WARNING
Ensure not to operate carburetor throttle mech-
anism. Secure the rear of the vehicle on a stand.
A
A32C0XA
A 1
2
6
4
5
3
B