McFarlane Aviation Products - CCH-KT-9

Part Number: CCH-KT-9

CESSNA CARB. HEAT REPAIR KITS

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Product Details

Control Arms, Shafts and Bearing Housings  
Unique elastomer bearing replaces needle bearing

McFarlane's elastomer bearing is assembled with tension between the mating surfaces. This tension prevents micro-movement and its related metal erosion. The bearing contact area that transfers vibration motion from the heat box to the butterfly shaft is hundreds of times greater than that of the original needle bearing. This large surface effectively prevents localized metal erosion.

 

 
  • Absorbs shaft and butterfly vibration
  • Eliminates needle bearing failures
  • Increases service life of all components
  • Direct replacement for original parts

 

Proven Design

  • Tested to over 700,000 cycles while exposed to avgas, heat and vibration without any change in performance
  • Extremely rugged and wear resistant in high temperature and fuel environments
 

 

Convenient

  • Discontinued part numbers through the factory are now manufactured by McFarlane
  • Shafts, arms, bearing housings, monel rivets and roll pins are also available separately or in kits  

 

The carburetor heat box suffer more from engine vibration than other parts of the engine installation due to the distance of its location from the center of the engine. Engine vibrations, which are small back and forth movements of the engine about a point of rotation in the engine, become larger and more severe as the distance increases from the center of these movements. A fraction of an inch of engine movement near the center of the engine could result in over an inch of movement in an attached component that is located a considerable distance from the center of the engine. This phenomenon can be visualized by imagining what would happen if a five foot broom handle was solidly attached to an idling aircraft engine. The far end of this broom handle would oscillate wildly back and forth as the engine moved slightly. This is similar to what is happening to the carburetor heat box. Normal engine vibrations are amplified by the distance (arm) from the center of the engine.

 

Ordinary needle bearings are not well suited for this high vibration environment as they concentrate the energy of vibration movement to the very small area where the needles contact the heat box butterfly shaft. This concentrated kinetic energy results in metal loss and grooves being worn into the shaft with eventual failure of the bearing system. Needle bearing failure can lead to ingestion of loose needles into the engine induction system and cylinders.

 

Needle bearings don't work!

 

Kit Components

Part Number CCH-KT-9 contains the following:

Component Description Quantity U/M
MC0750111-19 ARM (Carb Heat Shaft) 1.000 EACH
MC0750113-1 BEARING HOUSE (Cessna Airbox) 2.000 EACH
MC0750133-8 SHAFT (Carburetor Heat Box) 1.000 EACH
MS16562-16 ROLL PIN, .078 x .562 1.000 EACH
MS20615-4M9 RIVET, Monel, 1/8"" x 9/16"" 3.000 EACH

Eligible Aircraft

Make Series Model Beginning S/N Ending S/N Location Eligibility Chart
Cessna 180 180C 50662 50911 Airbox 7074
Cessna 180 180D 18050912 18051063 Airbox 7074
Cessna 180 180E 18051064 18051183 Airbox 7074
Cessna 180 180F 18051184 18051312 Airbox 7074
Cessna 180 180G 18051313 18051445 Airbox 7074
Cessna 180 180H 18051446 18052284 Airbox 7074
Cessna 180 180J 18052285 18052384 Airbox 7074
Cessna 180 180J 18052385 18052620 Airbox 7074
Cessna 180 180J 18052621 18052770 Airbox 7074
Cessna 180 180K 18052771 18053203 Airbox 7074
Cessna 182 182 33000 33842 Airbox 7074
Cessna 182 182A 33843 51556 Airbox 7074
Cessna 182 182B 51557 52358 Airbox 7074
Cessna 182 182C 52359 53007 Airbox 7074
Cessna 182 182D 18253008 18253598 Airbox 7074
Cessna 182 182E 18253599 18254423 Airbox 7074
Cessna 182 182F 18254424 18255058 Airbox 7074
Cessna 182 182G 18255059 18255844 Airbox 7074
Cessna 182 182H 18255845 18256684 Airbox 7074
Cessna 182 182J 18256685 18257625 Airbox 7074
Cessna 182 182K 18257626 18258505 Airbox 7074
Cessna 182 182L 18258506 18259305 Airbox 7074
Cessna 182 182M 18259306 18260055 Airbox 7074
Cessna 182 182N 18260056 18260825 Airbox 7074
Cessna 182 182P 18260826 18265175 Airbox 7074
Cessna 182 182Q 18265176 18267715 Airbox 7074
Cessna 182 182R 18267716 18268615 Airbox 7074
Cessna 182 F182P F18200001 F18200025 Airbox 7074
Cessna 182 F182Q F18200026 F18200169 Airbox 7074
Cessna 185 185 1850001 1850237 Airbox 7074
Cessna 185 185A 1850238 1850512 Airbox 7074
Cessna 185 185B 1850513 1850653 Airbox 7074
Cessna 185 185C 1850654 1850776 Airbox 7074
Cessna 185 185D 1850777 1850967 Airbox 7074
Cessna 185 185E 1850968 1851149 Airbox 7074
Cessna 185 A185E 1850968 1851300 Airbox 7074
Cessna 188 188 1880001 1880317 Airbox 7074
Cessna 188 188 1880001 1880572 Airbox 7074
Cessna 188 188 1880318 1880572 Airbox 7074
Cessna 188 188A 18800573 18800832 Airbox 7074
Cessna 188 188B 18800833 18802348 Airbox 7074

Related Documents

Eligibility Charts

ELIGIBILITY, Air Box Parts, Cessna
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