Replace Coolant Thermostat to Radiator Hose
100729-00
Use the following instructions to remove and replace the coolant thermostat to radiator hose.
Applicable Aircraft Serial Numbers
All
Type of Maintenance
Line
Level of Certification
LSA-RM
Task Specific Training Required
No
Special Tools Required
None
Parts Required
17.625 ± .25 inches 5591K15 (HOSE, SILICONE Rbr, WIRE REINF, 175 psi, 1.00X.156, BLUE)
9.125 ± .25 inches 5591K15 (HOSE, SILICONE Rbr, WIRE REINF, 175 psi, 1.00X.156, BLUE)
4X 3806 (CLAMP, WORM DRIVE, MINI, .312X0.781
2X MS21046C7 (NUT, SELF-LOCKING, CRES, .437-20)
Aircraft System and Number
13—Propulsion
Safety Equipment
As Needed
Consumables
F4TAPEBLACK as required (TAPE, SELF-FUSEING, SILICONE, .02 IN THK, 1 IN WIDE)
TY24MX as required (CABLE TIE, NYLON 6-6, 30LB, 5.50, TY-RAP)
Task Instructions
2. Once the coolant is drained, disconnect ECS hoses where they attach to the forward face of the thermostat and at the firewall connection point. (Engine
Coolant Replacement)
3. Disconnect radiator hoses where they attached to the sides of the thermostat and radiator.
4. If the length of the hose (5591K15) is not cut to length, then cut hose lengths for installations as below:
a. 17.625 ± .25 inches
b. 9.125 ± .25 inches
Figure 373. Coolant Hose Installation
7. Clocking position of thermostat housing cover may be adjusted if required.
8. Attach hose from expansion tank to hose fitting on thermostat and secure using hose clamp 25-40/9-W5), see Figure 373. Torque to 26 ± 2 in-lbs.
9. If removed, install engine into engine bay. (Install
Engine) Replace 2X locking nuts for engine mount bolts during installation. Do not connect any hoses from the engine.
Verification Method
Verify torque values and torque stripe locations.
Verify correct routing between expansion tank and radiator.
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