09/11/2018
RANS S-21 OUTBOUND
TEXT MANUAL
11-13
ROTAX 912 ULS - LUBRICATION SYSTEM INSTALLATION
(FINAL INSTALL OF ENGINE)
ASSEMBLY
•
Oil Tank should be installed to center of firewall.
•
Oil Breather Tube is installed on Firewall
•
The engine needs to be installed to the airframe.
1.
Refer to the parts catalog and select the required components for assembly.
2.
The Rotax 912ULS installation features an oil cooler mounted under the engine
mount.
CAUTION:
When working with the oil cooler take care not to induce stress
or over tighten fittings or bolts. Damage to the cooler may result. When
tightening the lines of the oil cooler it is necessary to use a wrench to
support the fitting.
3.
With a band saw or hacksaw, remove the mount tabs from the oil cooler leaving
a 1/16" lip past the Oil Cooler body.
4.
Inspect Oil Cooler threaded boss for nicks or burrs in O-ring contact area that
might cause O-ring failure. Inspect the Cooler port threads for any buildup of
coating. If needed, gently clean threads. Apply light petroleum oil to port threads.
Lubricate O-ring of fittings by coating with light petroleum oil and install the O-ring
onto the fitting. Install adaptor and fitting into the threaded boss on Oil Cooler.
Using two wrenches tighten fitting until hexagon face contacts the face of the
hexagon boss on Oil Cooler.
IMPORTANT:
Always use two wrenches to tighten fitting onto cooler.
Using only one wrench and cooler as leverage will cause cooler to fail. Do
NOT
Over Tighten. Tighten to just snug. The O-ring is the sealing
component. This is not a pipe thread.
5.
Cut the provided Silicone Sheets to length to fit in the Oil Cooler Mounts. Trim
just short of the outer bolt holes to allow clearance with the threaded bushings.
Install to the upper and lower oil cooler mounts as shown in the PARTS MANUAL
DRAWING. The sheets provide vibration isolation and should extend past the
forward and aft edges of the oil cooler.
NOTE:
Use the upper cooler mount as a template. Mark and cut. The
piece for the top of the oil cooler needs two holes to allow for the fittings.
6.
Locate Oil Cooler Mount Bracket onto Upper Oil Cooler Mount per
FIGURE 11D-
06/912
. Drill, countersink holes on Upper Oil Cooler Mount, and rivet together.
7.
Apply Loctite to bolts and assemble the upper and lower mounts to the Cooler
using the Threaded Bushings.