09/11/2018
RANS S-21 OUTBOUND
TEXT MANUAL
11-14
NOTE:
To achieve the proper compression on the Silicon Sheets, it might
be necessary to add washers between the threaded bushings and the
upper and lower oil cooler mounts.
8.
Bolt the Oil Cooler Assembly to the AFT side of the radiator through the Oil
Cooler Mount Bracket, as shown in the PARTS MANUAL DRAWING. Use Loctite
to secure the bolt.
9.
Refer to the parts manual for oil line routing.
IMPORTANT:
The pickup fitting is the straight fitting (OUT) on the oil
bottle and
MUST
route to the left hand fitting on the oil cooler. The return
fitting is the angled fitting (IN) on the oil bottle and
MUST
route to the
fitting on the bottom of the engine. Failure to route the oil lines properly will
result in engine failure.
10.
Fill the Oil Cooler and pickup side with oil using a syringe or funnel before engine
start-up. Install the Oil Lines onto the Oil Tank. Use a back-up wrench on the
Cooler and Oil Tank when tightening fittings.
11.
Apply anti-chafe and secure all lines as necessary.
12.
Cut to length and install the Overflow Line from the Oil Tank filler neck to the
Breather Tube located on the firewall. For tube fabrication, refer back to
ENGINE
ACCESSORY INSTALLATION
. Secure ends with safety wire.
PRE-ENGINE START UP
Refer to
ROTAX
for a more thorough Pre-start up procedure.
13.
Prior to starting the engine for the first time, install a new oil filter and fill the Oil
Tank to the full line on the dipstick. Refer to the Rotax manuals for oil
specifications.
14.
Remove the spark plugs on all four cylinders.
15.
Verify the ignition switch is
OFF
.
16.
Turn the prop through several revolutions by hand.
17.
With the spark plugs out and from the pilot’s seat, turn the key switch to the start
position and crank the engine for several seconds. Check for an oil pressure
indication on the gauge.
18.
If after several seconds, there is no sign of oil pressure, stop cranking the engine.
Remove the Tank to Oil Cooler line at the tank. Using a funnel, prime the oil line.
Check to be sure Oil Cooler to Pump line is full. Re-attach the line to the tank.
Crank the engine. When an oil pressure indication is achieved, stop cranking.
19.
Install the spark plugs and start the engine. Watch the oil pressure gauge as the
engine starts. After the engine starts, allow 10 seconds for oil pressure to come
up. If there is no pressure indication within 10 seconds, shut the engine off and
repeat the previous priming procedures. The engine will change sound (quieter)
as the oil starts pumping.