CAT 320B A8V0107 Hydraulic Pump: Specs, Failure Symptoms & Replacement Guide (2026)

Quick Answer

Key Takeaways

• The 320B main pump is an A8VO-series variable piston pump - RITO product 320B A8V0107, part no. 295-9676.
• Always confirm the number stamped on your old pump before ordering.
• The CAT 320B: 20-ton-class excavator with a Cat 3116 turbocharged engine, rated power approx. 117 kW (157 hp), operating weight approx.         20,000 kg.
• Variable piston structure - stable output flow and rapid machine response.
• Precision friction pair - wear resistant, longer service life, less internal leakage.
• High volumetric efficiency - low hydraulic loss and fuel economy; unit packs at 174 kg / 62 x 58 x 61 cm.

Table of Contents

1. Introduction: The CAT 320B and Its A8V0107 Hydraulic Pump
2. Caterpillar 320B Excavator Key Specifications
3. 320B A8V0107 Hydraulic Pump Specifications
4. Genuine vs OEM vs Aftermarket vs Rebuilt: Comparison Table
5. RITO HYDRAULIC 320B A8V0107 Pump: Key Features
6. Common Hydraulic Pump Problems & Symptoms
7. Maintenance & Service Tips
8. Buying Guide: What to Check Before Buying
9. Real-World Case Study: 320B A8V0107 Pump Supply (Replacement Project)
10. FAQ - CAT 320B A8V0107 Hydraulic Pump
11. Conclusion: Get the Right 320B Pump for Your Machine

1. Introduction: The CAT 320B and Its A8V0107 Hydraulic Pump

• The Caterpillar 320B is a 20-ton-class hydraulic excavator, a long-running and widely owned model with strong aftermarket demand.
• The main pump converts engine power into hydraulic flow and pressure for all working circuits.
• When the pump loses efficiency, digging force drops, response slows and fuel consumption rises.
• RITO HYDRAULIC supplies the direct-fit 320B A8V0107 main pump with verified part number 295-9676.

2. Caterpillar 320B Excavator Key Specifications

3. 320B A8V0107 Hydraulic Pump Specifications

4. Genuine vs OEM vs Aftermarket vs Rebuilt: Comparison Table

5. RITO HYDRAULIC 320B A8V0107 Pump: Key Features

• Variable Piston Structure - stable output flow with rapid response.
• Precision Friction Pair - wear resistant for a longer service life.
• High Volumetric Efficiency - low hydraulic loss for better fuel economy.
• Supplied as RITO 320B A8V0107 with part no. 295-9676 for the Caterpillar 320B.

6. Common Hydraulic Pump Problems & Symptoms

• Weak digging force - worn friction pairs reduce volumetric efficiency and output pressure.
• Slow machine response - internal leakage lowers pressure-flow output; boom and arm feel sluggish.
• Abnormal noise (knocking/whining) - cavitation, worn bearings or loose couplings.
• Overheating - internal leakage generates heat during heavy cycles.
• Oil leaks - failed shaft or cover seals; check seal condition during replacement.
• Higher fuel consumption - the machine works harder to compensate for pump losses.

7. Maintenance & Service Tips

• Keep hydraulic oil clean (ISO 4406 cleanliness class) - contamination is the #1 cause of pump wear.
• Change hydraulic oil and filters per the Caterpillar maintenance schedule.
• Check the suction filter and pump inlet regularly - restricted suction causes cavitation.
• Monitor oil temperature and system pressure; sudden changes are early warning signs.
• When replacing, verify the part number on the old pump (e.g., 295-9676) and coupling condition first.

8. Buying Guide: What to Check Before Buying

• Machine identification: exact model (320B) and machine serial number.
• Old pump part number: read the plate on the failed pump and match 295-9676.
• Quality tier: choose genuine, OEM, aftermarket or rebuilt based on machine age, duty and budget.
• Duty requirements: confirm stable flow output and rapid response for your working conditions.
• Logistics: confirm weight and packing (174 kg / 62 x 58 x 61 cm) to plan air vs sea freight.
• Warranty & support: confirm warranty terms, lead time and after-sales support before payment.

9. Real-World Case Study: 320B A8V0107 Pump Supply (Replacement Project)

RITO HYDRAULIC supplies complete CAT 320B main pumps (320B A8V0107, part no. 295-9676) with verified fit and factory packing data (174 kg / 62 x 58 x 61 cm). Key product points: variable piston structure for stable output flow and rapid response; precision friction pair for wear resistance and long service life; high volumetric efficiency for low hydraulic loss and fuel economy.

Based on our export experience, buyers replacing a failed 320B pump should confirm four things before ordering: the machine model and serial number; the part number stamped on the failed pump; the quality tier with warranty terms; and the freight plan based on the 174 kg packed weight. With these confirmed, the correct unit ships quickly and installs as a direct replacement - bringing the excavator back to full digging force with rapid response and better fuel economy.

10. FAQ - CAT 320B A8V0107 Hydraulic Pump

Q1: What hydraulic pump fits the CAT 320B?

The main pump for the CAT 320B is supplied as RITO 320B A8V0107 with part number 295-9676 - a variable piston pump with stable output flow and rapid response.

Q2: What is the CAT 320B?

The Caterpillar 320B is a 20-ton-class hydraulic excavator with a Cat 3116 turbocharged engine (approx. 117 kW / 157 hp) and an operating weight of approx. 20,000 kg.

Q3: What are the symptoms of a failing main pump?

Weak digging force, slow machine response, abnormal pump noise, overheating hydraulic oil, external oil leaks and rising fuel consumption are the most common warning signs.

Q4: Is the RITO pump a direct replacement for the 320B?

Yes. The 320B A8V0107 is built to OEM fit with a variable piston structure, so it installs as a direct replacement with stable output flow and rapid response.

Q5: How does the pump avoid internal leakage?

The precision friction pair is ground to a high-accuracy fit and is wear resistant, which reduces internal leakage and keeps the machine responsive.

Q6: Genuine or aftermarket - which should I choose?

Genuine parts carry the longest warranty at the highest price; quality aftermarket pumps offer verified fit at a competitive price - a practical choice for 320B machines. Confirm the quality tier and warranty before ordering.

Q7: How much does a CAT 320B A8V0107 pump cost?

Price depends on the quality tier (genuine / OEM / aftermarket / rebuilt) and shipping. Contact RITO HYDRAULIC with your machine model and old part number for an exact quote.

Q8: How often should I service the hydraulic system?

Follow the Caterpillar maintenance schedule for hydraulic oil and filter changes, and monitor oil cleanliness. Contaminated oil is the leading cause of premature pump failure.

Q9: How do I confirm the right part number?

Read the part number stamped on your old pump (e.g., 295-9676) and check the machine model and serial number with your supplier before ordering.

Q10: Where can I buy a CAT 320B A8V0107 hydraulic pump?

RITO HYDRAULIC supplies the 320B A8V0107 pump with verified part number, direct fit, warranty and export packing (174 kg / 62 x 58 x 61 cm). Send your machine model and old part number for a quote.

11. Conclusion: Get the Right 320B Pump for Your Machine

The CAT 320B A8V0107 hydraulic pump (295-9676) is a direct-fit replacement with stable output flow, rapid response and fuel economy. Confirm your machine model, old part number and quality tier, and your excavator will be back to full digging force with lower fuel consumption. RITO HYDRAULIC offers verified fit, transparent warranty and fast export shipping - contact us today for a quote.