Редуктор хода 378-9568 для среднего экскаватора Caterpillar 329DL

329DL Final Drive for CAT Excavator spare parts 378‑9568 3789568 267‑6877 2676877 171‑9410 1719410 Axial Piston Motor

Product Overview

The CAT 329DL is a 29‑ton D‑series excavator built for heavy earthmoving, quarry loading and large‑site excavation — a machine that spends its days stripping overburden and loading trucks on production crews. Under each track frame sits the axial piston motor and planetary reducer, covered by references 378‑9568, 267‑6877 and 171‑9410, that takes high‑pressure oil from the main pump and trades speed for the low‑speed torque pulling that much weight across rough ground.

On a worked D‑series Cat, drive wear is not a subtle thing — it is felt across the whole operation. One track lags on the climb out of the pit, the track shell runs noticeably hot after a shorter run than usual, and a deepening note comes through the floor plates under load. Continuing to work scores the piston group and reduction gears further, and worn metal then circulates through the travel circuit. This aftermarket unit reproduces the original motor‑and‑reducer pairing as one sealed, bench‑run assembly, so the worn drive lifts out whole and the replacement drops straight in.

Core Advantages

1. Six references, one matched drive
The part numbers cover build variants and internal sub‑assemblies across the 329DL run. We confirm the correct unit against your machine serial number, so workshops stocking this drive can support the whole D L range without guessing.

2. Torque to pull a loaded 29‑ton frame up ramps
Hardened gear stages multiply motor output down to sprocket speed, so the track digs in rather than spinning on muddy climbs. No laboured, whirring travel under a full bucket.

3. A lapped piston group that holds pressure
The cylinder block, piston shoes and valve plate are finished to close clearance, so oil pressure does not bleed internally. Both tracks pull in step — no wander on the haul road, no lazy side.

4. Sealed for quarry dust and standing water
Heavy Cats work through long shifts in quarry dust, mud and standing water. Fresh shaft and housing seals keep grit out of the lube — the line between a drive that lasts and one that fails early.

5. One complete, tested unit for a fast turnaround
Motor and reduction arrive pre‑assembled and bench‑checked, so the whole drive swaps in one operation. No sourcing separate parts, no mid‑job mismatches — critical when a stationary 29‑ton machine is losing money by the hour.

Manufacturing & Quality Control

Parts are machined to CAT print, heat‑treated at wear points, and assembled in a clean shop. Each finished drive runs on a hydraulic stand while torque, leakage and noise are logged; units outside spec are reworked before packing. The internals are fogged with preservation oil, ports are plugged, and the assembly ships on shock‑absorbing dunnage.

Frequently Asked Questions

Q1: Which of the six references suits my machine?
A: Read the tag on your existing drive against 378‑9568, 267‑6877 or 171‑9410 and send the machine serial number. The references cover build variants and sub‑assemblies, so we confirm the exact unit before dispatch.

Q2: Is this the complete motor and reducer?
A: Yes — the listing covers the full axial piston motor and planetary reducer as one assembly, ready to bolt on. If you need only internal parts, ask and we will check availability.

Q3: What symptoms mean the drive is wearing out?
A: Uneven track speed, pulling to one side, a hot or noisy track motor, and tracks that slip rather than pull under load. Catch it before swarf spreads through the whole travel circuit.

Q4: Can I ship this by sea to African ports?
A: Yes — drives this size ship well by sea. Tell us the destination port and we will quote door‑to‑port or door‑to‑door, including any inland trucking needed.

Q5: What is the warranty position?
A: Materials and build defects are covered. Damage from dirty oil, debris in the motor, track obstruction, overload or incorrect fitting is excluded. Photograph any arrival damage before uncrating.