099-6534 Schwenkantrieb für Caterpillar E110B E120B Midibagger

1. Product Identification
Component: Swing Motor Device Assembly (Genuine Refurbished Quality)

Machine Compatibility:

Caterpillar (CAT) E110B Midi Excavator

Caterpillar (CAT) E120B Midi Excavator

Condition: Premium Refurbished / Fully Remanufactured to OEM Standards

System Function: Provides high-torque rotational power to the upper structure for smooth 360-degree swing operations.

2. Technical Specifications
Type: Axial Piston Swing Motor with Integrated Planetary Reduction Gearbox

Operating Pressure: Configured to original CAT factory relief specifications (typically 24-26 MPa)

Refurbishing Standards:

Cylinder block, valve plate, and piston sets are precision-ground, lapped, or replaced with new components.

All dynamic seals, O-rings, and heavy-duty shaft bearings are replaced with 100% brand-new premium parts.

Bench-tested under full load simulations to verify flow retention, brake holding power, and zero pressure drop.

3. Critical Installation Requirements
Case Priming (Mandatory)
Before starting the machine, you must manually fill the swing motor housing with clean hydraulic oil through the highest case drain port. Running the motor dry for even a few seconds will instantly score the newly lapped valve plate and destroy the piston shoes.

Check the Case Drain Return Line
Ensure the case drain line running back to the hydraulic tank is entirely free of restrictions, debris, or backpressure. Excessive backpressure in the motor housing will immediately blow the main shaft seal.

Slew Ring & Pinion Greasing
Thoroughly clean the mounting area on the excavator chassis. Ensure the output pinion shaft meshes perfectly with the main slew ring gear, and apply premium heavy-duty lithium grease to the gear teeth during installation.

Hydraulic System Decontamination
If the previous swing motor suffered a catastrophic mechanical failure, the hydraulic lines, control valve swing spool, and reservoir must be completely flushed. Any residual metallic particles will rapidly destroy a refurbished unit.

4. Frequently Asked Questions (FAQ)
Q: What does "Genuine Refurbished Quality" mean for the E110B / E120B?
A: It means the core housing, gear reduction assembly, and major structural castings are original genuine CAT parts that have been stripped down, inspected, and rebuilt using brand-new wear parts (seals, bearings, pistons). It delivers the same performance and lifespan as a new OEM unit at a lower cost.

Q: My E120B swing function feels "spongy" or overtravels when I release the joystick. Will this fix it?
A: Yes. Overtravel or drifting is usually caused by worn internal time-delay valves, weak relief valves, or scored friction discs inside the integrated swing brake network. Replacing the complete motor assembly updates all of these wearable systems at once.

Q: Are the swing motors for the CAT E110B and E120B identical?
A: Mechanically, they share the same physical mounting frame and hydraulic parameters. However, slight configuration differences in the pilot line port sizing or output pinion teeth count can exist depending on the specific machine serial prefix. Always provide your Machine Serial Number to confirm a 100% match before shipping.

5. Shipping & Logistics
Packaging: Thoroughly drained, treated with rust-inhibiting storage oil, and secured inside an export-grade, padded wooden shipping crate.

Transit Time: Global express air freight via DHL/FedEx/UPS typically delivers within 3 to 7 business days to minimize machine downtime.