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SKU:
NLT2T00528
Ships for free in 2–4 business days.
Caterpillar Throttle Governor Motor 7Y-5559 – E312 E320 Excavators
$355.19
In Stock
$355.19
Sale price
$355.19
Regular price
This throttle/governor actuator motor replaces Caterpillar 7Y-5559 on compatible E312 and E320 excavator engine-control systems.
Estimated delivery between
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
| Make / Family | Applications |
|---|---|
| Caterpillar excavators | E312 and E320 applications using throttle actuator 7Y-5559 |
Product Overview
The governor motor moves the throttle/fuel-control linkage in response to the machine’s engine-speed command. A worn geartrain, weak motor or failed position/control circuit can cause slow throttle response, inability to reach commanded RPM or an engine that remains at one speed.
The 7Y-5559 actuator is commonly sold for early Caterpillar E312/E320 excavator applications. Before condemning the actuator, inspect the linkage for binding and verify the control signal, because a mechanically stuck lever can overload a replacement motor.
Key Features & Performance
- Electromechanical engine-speed/throttle actuation
- Service replacement for Caterpillar 7Y-5559 applications
- Restores commanded throttle movement when the original actuator has failed
Technical Details
- Component type: throttle / governor actuator motor
- Equipment class: Caterpillar hydraulic excavator
- Verification points: linkage, connector and actuator part number
Replaces Part Numbers
- 7Y-5559
- 7Y5559
Frequently Asked Questions
Q: Should I replace the motor if the throttle linkage is stiff?
A: Correct the binding linkage first. Excessive resistance can damage the actuator.
Q: Is this the engine governor itself?
A: It is the electric actuator/motor that moves the throttle/governor control linkage, not the complete fuel injection governor assembly.
Confirm actuator number and linkage configuration on the machine before purchase.