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Part # SDKT-7
SEAL KIT, Shimmy Dampener
Product Details
Specifications
- Approval
- Kit with Approved Contents
- Condition
- New
- Manufacturer
- McFarlane Aviation
- Dimensions
- L: 6.5 x W: 6 x H: 1 in
- Weight
- 0.08 lbs
- Unit of Measure
- Each
- McFarlane Part Number
- SDKT-7
Product Description
Note: Only for use with McFarlane Shimmy Dampener Assembly P/N MC0442512-1.
Note 3 from eligibility Drawing 7081: Aircraft models in this serial range are eligible for McFarlane Shimmy Dampener Repair Kit when equipped with a McFarlane Shimmy Dampener Assembly P/N MC0442512-1.
Can You Stop Nose Gear Shimmy? by Dave McFarlane
WARNING: Cancer and/or Reproductive Harm - California Proposition 65 Resources
Eligible Aircraft
| Make | Model | Start S/N | End S/N | Quantity Per Aircraft | Location | Comment | Eligibility Chart |
|---|---|---|---|---|---|---|---|
| Cessna 150G | 150G | S/N 15064533 – 15067198 | 15067198 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment Except 15064970; See Note 3 | Eligibility Chart 7081 |
| Cessna 150H | 150H | S/N 15067199 – 15069308 | 15069308 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment Includes 649; See Note 3 | Eligibility Chart 7081 |
| Cessna 150J | 150J | S/N 15069309 – 15071128 | 15071128 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna 150K | 150K | S/N 15071129 – 15072003 | 15072003 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna 150L | 150L | S/N 15072004 – 15075781 | 15075781 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna 150M | 150M | S/N 15075782 – 15079405 | 15079405 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna A150K | A150K | S/N A1500001 – A1500226 | A1500226 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna A150L | A150L | S/N A1500227 – A1500523 | A1500523 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna A150M | A150M | S/N A1500524 – A1500734 | A1500734 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment Includes 15064970 except A1500433; See Note 3 | Eligibility Chart 7081 |
| Cessna F150G | F150G | S/N F150-0068 – F150-0219 | F150-0219 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna F150H | F150H | S/N F150-0220 – F150-0389 | F150-0389 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna F150J | F150J | S/N F150-0390 – F150-0529 | F150-0529 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna F150K | F150K | S/N F15000530 – F15000658 | F15000658 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna F150L | F150L | S/N F15000659 – F15001143 | F15001143 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna F150M | F150M | S/N F15001144 – F15001428 | F15001428 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna FA150K | FA150K | S/N FA1500001 – FA1500081 | FA1500081 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna FA150L | FA150L | S/N FA1500082 – FA1500120 | FA1500120 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna FA150L (when equipped w/FKA150-2311 & FKA150-2316) | FA150L (when equipped w/FKA150-2311 & FKA150-2316) | S/N FA1500121 – FA1500261 | FA1500261 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna FA150M (when equipped w/FKA150-2311 & FKA150-2316) | FA150M (when equipped w/FKA150-2311 & FKA150-2316) | S/N FA1500262 – FA1500336 | FA1500336 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna FRA150L | FRA150L | S/N FRA1500121 – FRA1500261 | FRA1500261 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna FRA150M | FRA150M | S/N FRA1500262 – FRA1500336 | FRA1500336 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna 152 | 152 | S/N 15279406 – 15286033 | 15286033 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna A152 | A152 | S/N A1520735 – A1521049 | A1521049 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment Includes 681 & A1500433; See Note 3 | Eligibility Chart 7081 |
| Cessna F152 | F152 | S/N F15201429 – F15201980 | F15201980 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna FA152 | FA152 | S/N FA1520337 – FA1520425 | FA1520425 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna 172 | 172 | S/N 46433 – 46754 | 46754 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna 172A | 172A | S/N 46755 – 47746 | 47746 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment Includes 622 & 625; See Note 3 | Eligibility Chart 7081 |
| Cessna 172B | 172B | S/N 17247747 – 17248734 | 17248734 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment Includes 630; See Note 3 | Eligibility Chart 7081 |
| Cessna 172C | 172C | S/N 17248735 – 17249544 | 17249544 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna 172D | 172D | S/N 17249545 – 17250572 | 17250572 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna 172E | 172E | S/N 17250573 – 17251822 | 17251822 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment Includes 639; See Note 3 | Eligibility Chart 7081 |
| Cessna 172F (T-41A) | 172F (T-41A) | S/N 17251823 – 17253392 | 17253392 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna 172G | 172G | S/N 17253393 – 17254892 | 17254892 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna 172H (T-41A) | 172H (T-41A) | S/N 17254893 – 17256512 | 17256512 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment Includes 638 except 17256493; See Note 3 | Eligibility Chart 7081 |
| Cessna 172I | 172I | S/N 17256513 – 17257161 | 17257161 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna 172K | 172K | S/N 17257162 – 17259223 | 17259223 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna 172L | 172L | S/N 17259224 – 17260758 | 17260758 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna 172M | 172M | S/N 17260759 – 17263458 | 17263458 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment Includes 17256493 except 17261445 & 17261578; See Note 3 | Eligibility Chart 7081 |
| Cessna 172M | 172M | S/N 17263459 – 17267584 | 17267584 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna 172N | 172N | S/N 17267585 – 17274009 | 17274009 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment Includes 17261445 & 17261578; See Note 3 | Eligibility Chart 7081 |
| Cessna 172P | 172P | S/N 17274010 – 17276654 | 17276654 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna 172Q | 172Q | S/N 17275869 – 17276211 | 17276211 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment Except 17276055 thru 17276100; See Note 3 | Eligibility Chart 7081 |
| Cessna 172R | 172R | S/N 17280001 – 17281142 | 17281142 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna 172S | 172S | S/N 172S8001 – 172S9288 | 172S9288 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna F172D | F172D | S/N F172-0001 – F172-0018 | F172-0018 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna F172E | F172E | S/N F172-0019 – F172-0085 | F172-0085 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna F172F | F172F | S/N F172-0086 – F172-0179 | F172-0179 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna F172G | F172G | S/N F172-0180 – F172-0319 | F172-0319 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna F172H | F172H | S/N F17200655 – F17200754 | F17200754 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna F172H | F172H | S/N F172-0320 – F172-0654 | F172-0654 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna F172K | F172K | S/N F17200755 – F17200804 | F17200804 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna F172L | F172L | S/N F17200805 – F17200904 | F17200904 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna F172M | F172M | S/N F17200905 – F17201234 | F17201234 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna F172M | F172M | S/N F17201235 – F17201514 | F17201514 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna F172N | F172N | S/N F17201515 – F17202039 | F17202039 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna F172P | F172P | S/N F17202040 – F17202254 | F17202254 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna FP172 | FP172 | S/N FP172-0001 – FP172-0003 | FP172-0003 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna FR172E | FR172E | S/N FR17200001 – FR17200060 | FR17200060 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna FR172F | FR172F | S/N FR17200061 – FR17200145 | FR17200145 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna FR172G | FR172G | S/N FR17200146 – FR17200225 | FR17200225 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment Except FR17200206; See Note 3 | Eligibility Chart 7081 |
| Cessna FR172H | FR172H | S/N FR17200226 – FR17200350 | FR17200350 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna FR172J | FR172J | S/N FR17200351 – FR17200590 | FR17200590 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment Except FR17200560 & FR17200561; See Note 3 | Eligibility Chart 7081 |
| Cessna FR172K | FR172K | S/N FR17200591 – FR17200675 | FR17200675 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna P172D | P172D | S/N P17257120 – P17257188 | P17257188 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna R172K | R172K | S/N R1722000 – R1723454 | R1723454 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment Includes 680; See Note 3 | Eligibility Chart 7081 |
| Cessna 175 | 175 | S/N 55896 – 56238 | 56238 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna 175A | 175A | S/N 56239 – 56777 | 56777 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment Includes 619; See Note 3 | Eligibility Chart 7081 |
| Cessna 175B | 175B | S/N 17556778 – 17557002 | 17557002 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna 175C | 175C | S/N 17557003 – 17557119 | 17557119 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment See Note 3 | Eligibility Chart 7081 |
| Cessna 182B | 182B | S/N 51557 – 52358 | 52358 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment Includes 34754 except 51623; See Note 3 | Eligibility Chart 7081 |
| Cessna 182C | 182C | S/N 52359 – 53007 | 53007 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment Includes 631; See Note 3 | Eligibility Chart 7081 |
| Cessna 182D | 182D | S/N 18253008 – 18253598 | 18253598 | Quantity Per Aircraft 1 | Location SHIMMY DAMPENER | Comment Includes 51623; See Note 3 | Eligibility Chart 7081 |
FAQs
I installed a torque link kit and serviced my shimmy dampener; why do I still have a shimmy problem?
There are many components all connected to keep the nose gear in line. If one component is worn or out of tolerance it can cause shimmy problem. Reference Dave McFarlane’s article: Can You Stop Nose Gear Shimmy instructions and suggestions.
Overlooked items also include the rod ends, shimmy dampener mounting and attachment, shimmy dampener, and steering collar. The steering collar is where the steering rod tubes connect and the upper torque link is attached to, along with the shimmy dampener on most aircraft. If the steering collar has play vertically and laterally and is allowed to tilt; that will cause excessive wear and force on the torque links, steering, and strut components. There are three different thicknesses of shims to help get the collar in place.
Ensure that the shimmy dampener is working properly with no dead spots in dampening action. The cylinder could be worn on the inside or on a piston that warrants replacement of components. All of the nose strut components are tied to each other and any movement is transmitted through to the tire and back through the dampening system, which if remedied will continue to be more pronounced.
What does temperature compensated mean?
When hydraulic oil changes temperature, the volume of the oil also changes. This volume change from a temperature reduction will create a vacuum in the oil chamber of the original Cessna uncompensated shimmy dampener. This vacuum will cause the oil to vaporize giving the oil a foamy expanded mixture that is compressible. The shimmy dampener action is then drastically degraded. An increase in temperature will increase the oil volume causing a drastic pressurization of the dampener oil chamber. This pressure will force small quantities of oil past the dampener shaft seals. The decrease in oil will then aggravate any temperature reduction with increased chamber vacuum and related oil vaporization. This process explains why continuous servicing of the original shimmy dampener is required.
The temperature compensation system works by having a small chamber of oil that is spring pressurized through a very small passage into the main dampening restrictive orifice of the shimmy dampener. The spring loaded oil chamber can adjust for oil volume changes as temperature changes. A similar system is built into your car shock absorbers. The temperature compensated hydraulic system requires very little service over extended periods of time and assures stable shimmy dampening action.
Why is a hydraulic shimmy dampener better than a rubber dampener?
A rubber based dampener is continuously fatiguing the rubber components as it changes direction of motion. The rubber system depends on stable friction of the rubber riding in a metal tube. This is very difficult to achieve over extended usage. There are inherent differences in static friction of rubber and dynamic friction of rubber that affect dampening performance. Long term use changes the performance of the dampener caused by all of these un-repairable factors. The hydraulic system works in a film oil with stable performance for long periods of time and it is totally repairable.
