Caterpillar 320 GC Travel Motor (Final Drive): Specifications, Features & Buying Guide (2026)

Quick Answer

Key Takeaways

• The CAT 320 GC is a 20-ton-class excavator powered by a Cat C4.4 single-turbo engine (approx. 107-109 kW / 146 hp; operating weight approx. 21,900-22,000 kg; max digging depth approx. 6,720 mm).
• The travel motor / final drive converts hydraulic power into track torque through a planetary gearbox - it is the component that moves the machine.
• RITO HYDRAULIC offers a CAT 320 GC travel motor built for direct bolt-on replacement (no modification), high torque, fully sealed design and long service life.
• Typical failure signs: no track movement, weak or jerky travel, abnormal noise, oil leaks, or overheating - repair early to protect the planetary gearbox.
• Choose between genuine, OEM, aftermarket and rebuilt quality tiers based on machine age, budget and how critical the job is.
• Always confirm your machine serial number and the travel motor part number before ordering to guarantee fit.

Table of Contents

1. Introduction: The CAT 320 GC and Its Travel System
2. CAT 320 GC Excavator Key Specifications
3. What Is a Travel Motor / Final Drive and Why It Matters
4. RITO HYDRAULIC CAT 320 GC Travel Motor: Key Features
5. Original vs Aftermarket vs Rebuilt: Comparison Table
6. Common Travel Motor Problems & Symptoms
7. Final Drive Maintenance & Service Tips
8. Buying Guide: What to Check Before Buying
9. Real-World Case Study: CAT 320 GC Travel Motor Supply (Export Project)
10. FAQ - CAT 320 GC Travel Motor
11. Conclusion: Get the Right Travel Motor for Your CAT 320 GC

1. Introduction: The CAT 320 GC and Its Travel System

• Position: the 320 GC is Caterpillar's value-focused 20-ton medium excavator for general construction, utility and rental fleets.
• Travel system: each track side is driven by a travel motor - a hydraulic motor combined with a planetary final drive gearbox.
• Why the travel motor matters: when it fails, the machine cannot move; downtime on site is expensive.
• This guide covers specifications, product features, failure signs, maintenance and buying advice - written with hands-on export experience supplying CAT 320 GC travel motors.

2. CAT 320 GC Excavator Key Specifications

• Specifications vary by configuration and emissions tier - always confirm with the official Cat specification sheet for your machine serial number.

3. What Is a Travel Motor / Final Drive and Why It Matters

• How it works: the travel motor is a hydraulic motor driven by oil from the main pump; a planetary gearbox (final drive) multiplies torque and turns the drive sprocket.
• What it does: it powers travel, steering and hill climbing - the component that moves a 20-ton machine on any site.
• Construction: a heavy-duty casting, pistons/rollers, planetary gears, seals and a shaft - built to survive dust, water and impact loads.
• Why quality matters: a cheap or poorly sealed unit fails fast in mining conditions; a fully sealed, precision-geared unit lasts far longer.

4. RITO HYDRAULIC CAT 320 GC Travel Motor: Key Features

• Precision Bolt-On Fit: direct replacement for the CAT 320 GC - no modification needed.
• High Torque Output: reliable power for tough terrain and heavy loads.
• Fully Sealed Design: dust-proof and waterproof for harsh mining conditions.
• Precision-Geared: extended service life with low maintenance.
• Compatibility: engineered for CAT 320 GC machines used in mining, construction and earthmoving.

5. Original vs Aftermarket vs Rebuilt: Comparison Table

• Decision framework: machine age, working hours, site conditions (mining vs light construction), and budget.

6. Common Travel Motor Problems & Symptoms

• Machine will not travel: internal motor failure, broken gears, or hydraulic supply issues - check oil flow and pressure first.
• Weak or jerky travel: worn pistons/rollers or leaking seals inside the motor.
• Abnormal noise (grinding/whining): worn bearings, gears or insufficient oil in the final drive.
• Oil leaks: damaged shaft seals or housing seals - fix early to avoid contamination and gear damage.
• Overheating: wrong oil viscosity, low oil level, or internal friction from wear.
• Quick diagnosis checklist: hydraulic pressure, oil level and condition, seal condition, gear backlash.

7. Final Drive Maintenance & Service Tips

• Check final drive oil level regularly and change it per the Cat maintenance schedule.
• Inspect seals and the sprocket for wear - a leaking seal lets dust and water in and kills the gears.
• Use the correct oil viscosity for your climate and operating conditions.
• Listen for unusual noise during travel; address it early before a motor failure becomes a gearbox failure.
• Keep the area around the final drive clean to reduce contamination entering the seals.

8. Buying Guide: What to Check Before Buying

• Machine identity: CAT 320 GC model year and machine serial number (PIN).
• Part number: the travel motor part number on the old unit - match it exactly.
• Fit type: confirm bolt-on dimensions, spline/shaft configuration and mounting - a direct replacement needs no modification.
• Quality tier: genuine vs OEM vs aftermarket vs rebuilt, with warranty terms.
• Logistics: travel motors are heavy - confirm weight and packing for air or sea freight, Incoterms and lead time.

9. Real-World Case Study: CAT 320 GC Travel Motor Supply (Export Project)

RITO HYDRAULIC supplies heavy-duty CAT 320 GC travel motors built for direct bolt-on replacement. The unit combines high torque output, a fully sealed dust-proof and waterproof design, and precision-geared construction for extended service life - engineered for CAT 320 GC machines in mining, construction and earthmoving.

Based on our export experience, buyers should verify the following before ordering a travel motor:

• Machine serial number (PIN) and model year to confirm the correct version.
• The part number on the failed unit for exact matching.
• Bolt-on fit and shaft/mounting configuration - no modification should be needed.
• Quality tier and warranty terms; ask for the test report where available.
• Freight plan based on weight; payment terms and lead time.

10. FAQ - CAT 320 GC Travel Motor

1. What travel motor fits the CAT 320 GC?

A travel motor / final drive compatible with the CAT 320 GC is required; RITO HYDRAULIC supplies a precision bolt-on replacement with no modification needed. Confirm with your machine serial number and the old unit's part number.

2. What is a final drive on an excavator?

It is the combination of a hydraulic travel motor and a planetary gearbox mounted at each track side. It converts hydraulic pressure into the torque that turns the track sprocket and moves the machine.

3. How much power does the CAT 320 GC have?

The Cat C4.4 single-turbo engine delivers approx. 107-109 kW (146 hp) net, with an operating weight of approx. 21,900-22,000 kg and a max digging depth of approx. 6,720 mm.

4. How do I know if my travel motor is failing?

Typical signs: the machine will not travel, weak or jerky travel, grinding or whining noise, oil leaks, or overheating. Check hydraulic pressure and final drive oil before replacing the unit.

5. What is the difference between original and aftermarket travel motors?

Original (Cat) units carry the highest price and warranty; OEM and quality aftermarket units offer good performance at lower cost; rebuilt units depend on the condition of the core. Choose by machine age, budget and site conditions.

6. Is the RITO travel motor a direct bolt-on replacement?

Yes - it is designed as a precision bolt-on replacement for the CAT 320 GC with no modification needed, featuring a fully sealed design and high torque output.

7. How much does a CAT 320 GC travel motor cost?

Prices vary by quality tier (genuine / OEM / aftermarket / rebuilt) and region. Request a quote with your machine serial number and the old part number for accurate pricing.

8. How often should I service the final drive?

Follow the Cat maintenance schedule: check final drive oil level regularly and change oil at the recommended intervals; inspect seals and sprocket wear during routine service.

9. How do I check my machine's travel motor part number?

The part number is stamped on the travel motor nameplate or casting. Record it together with the machine PIN when ordering to guarantee fit.

10. Where can I buy a CAT 320 GC travel motor?

RITO HYDRAULIC supplies CAT 320 GC travel motors with export packing and warranty. Send your machine serial number and old part number for a quote.

11. Conclusion: Get the Right Travel Motor for Your CAT 320 GC

A reliable travel motor keeps your CAT 320 GC moving on every site - from mining to construction. Confirm the machine serial number and old part number, choose the right quality tier, and plan the freight, and your excavator will be back to work quickly.

Request a quote today - send your CAT 320 GC machine serial number and old travel motor part number to RITO HYDRAULIC for pricing, warranty and lead time.