Diesel Engine Idler Service Parts - Spring, Air Cylinder, Tie Rod End and Control Tube
Individual service parts for the diesel engine idler on an engine driven air compressor. The idler is the assembly that pulls the engine down to idle when the tank reaches cut out pressure and lets it back up to speed at cut in. It is made up of an air cylinder that takes the control signal, a return spring, a tie rod end that connects it to the throttle linkage, and the nylon tube that carries control air to it.
All four are wear items and all four are sold here separately, so you can replace the one that has actually failed rather than buying the complete kit.
Parts
- M5599: idler spring, reference M1449
- M5600: air cylinder
- M5601: tie rod end
- M5602: 1/4 in nylon control tube, 4 ft length
Diagnosing which one
With the machine off and no air in the system, work the linkage by hand. Play you can feel at the throttle end is usually the tie rod end. A spring that has lost its rate will let the engine sit part way, or make it lazy coming back up to speed. For the cylinder, apply shop air gently to its control port and watch whether it strokes fully and holds, or creeps back. Brittle, cracked or kinked tubing is the cheapest fault of the four and worth ruling out first, because it looks exactly like a failed cylinder from the operator seat.
When to buy the kit instead
On a machine that has been in service for years, these parts tend to be at similar stages of wear even when only one has failed outright. If two or more are suspect, the complete KD idler kit for 10 HP Kohler diesel is usually the better value and gets everything back to new at once.
Related parts
We also stock the complete KD idler kit, engine idler assemblies for Honda GX390, GX620 and GX630 and for Kohler gas engines, bullwhip idler throttle controls, and CDI pilot valves for the control signal that drives all of this.
Questions
Describe what the engine is doing at cut out and cut in and tell us the engine model, and the Warthog Air Compressor Store team will help you work out which part to order.
Diesel engine idler service parts for air compressors: idler spring, air cylinder, tie rod end and 4 ft of 1/4 in nylon control tube.
NOTE: Actual product may be different from pictured!
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