09/11/2018
RANS S-21 OUTBOUND
TEXT MANUAL
11-10
ROTAX 912 ULS - COOLING SYSTEM INSTALLATION
(AFTER INSTALLATION OF ENGINE MOUNT)
ASSEMBLY
1.
Refer to the parts catalog and select the required components for assembly.
2.
The items below should have been done before installing the engine to the
Engine Mount. If not, then do so before proceeding.
•
Rotate the water pump inlet on engine to the lower right position.
Retighten screws to 90 in. lbs.
•
Completely remove Rotax installed coolant hose attached to AFT cylinder
head coolant fitting. Move the Aft end of the remaining coolant hose to the
upper water pump fitting. Install the “S” shaped radiator hoses from aft
cylinder head coolant fittings to lower water pump fittings. The "S" end will
attach to the lower water pump fitting. The “S” hose prevents coolant hose
conflict with the engine mount. Install on both right and left aft fittings. Trim
hose as required to prevent binding.
3.
Attach Radiator Mounts to top of Radiator with Cushion Clamps and hardware
shown and attach to Engine Mount tubes as shown. Leave the nuts and bolts
slightly loose to allow adjustment. Tighten after final positioning. Refer to
FIGURE 11C-03/912
for Clamp locations.
NOTE:
Notice the orientation of the Cushion Clamps.
4.
Oil Cooler Mount Bracket will attach to lower end of Radiator after attaching to Oil
Cooler.
(AFTER INSTALLATION OF OIL COOLER TO RADIATOR)
5.
Rotate bottom of Radiator aft and temporarily bolt through Mount Bracket -
Radiator to cushion clamps on lower AFT Engine Mount tubes. Refer back to
FIGURE 11C-03/912
.
6.
Cut Pre-formed Radiator "U" Hose into 2 pieces to form 2 90-degree hoses.
Install to left side radiator inlet.
7.
Route 1" Radiator Hose from right side Radiator Outlet and Coolant Pump Inlet.
Insert Hose Spring into Radiator Hose until located at bend area to help prevent
possible hose collapse.
NOTE:
Unbolt lower end of radiator and rotate out of way as needed to
attach.
8.
Route 1" Radiator Hose between left side Radiator Inlet and Expansion Bottle on
top of engine with a Cooling Tube Union. Insert Hose Spring into Radiator Hose
until located at bend area to help prevent possible hose collapse.