Caterpillar 345B A8VO200 Hydraulic Pump: Complete Specifications, Features & Buying Guide (2026)

Quick Answer

Key Takeaways

• The 345B main pump is a Rexroth-series A8VO200 axial piston pump (200 cm³/rev) - RITO product code E345B A8V0200.
• Common reference part numbers: 216-0032, 194-8259 (345B / 345B II / W345B II) and 141-9135 (345B L) - always confirm the number stamped on your old pump before ordering.
• The CAT 345B: 43-ton-class mining excavator, rated power approx. 216 kW (290 hp), Cat 3176C family engine with 10.3 L displacement.
• Precision distribution-pair grinding and inspected core rotating components reduce internal leakage and restore full digging force.
• No patchwork refurbishing - a cost-effective repair solution with moderate budget and fast payback versus a genuine replacement.
• Before ordering: confirm machine model, old part number, quality tier and freight plan (the unit packs at 250 kg / 68 x 68 x 71 cm).

Table of Contents

1. Introduction: The CAT 345B and Its A8VO200 Hydraulic Pump
2. Caterpillar 345B Excavator Key Specifications
3. E345B A8VO200 Hydraulic Pump Specifications
4. Genuine vs OEM vs Aftermarket vs Rebuilt: Comparison Table
5. RITO HYDRAULIC 345B A8VO200 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: 345B A8VO200 Pump Supply (Mining Operations)
10. FAQ - CAT 345B A8VO200 Hydraulic Pump
11. Conclusion: Get the Right 345B Pump for Your Machine

1. Introduction: The CAT 345B and Its A8VO200 Hydraulic Pump

• The Caterpillar 345B is a 43-ton-class hydraulic excavator built for mining, quarrying and heavy earthmoving duty.
• The hydraulic main pump converts engine power into flow and pressure for the boom, arm, bucket, swing and travel circuits.
• The 345B uses a Rexroth-series A8VO200 axial piston pump as its main pump; when it fails, the machine loses digging force and response speed - downtime in a mine is extremely costly.
• RITO HYDRAULIC supplies the direct-fit 345B A8VO200 main pump (E345B A8V0200) with verified reference part numbers and OEM-parameter matching.

2. Caterpillar 345B Excavator Key Specifications

3. E345B A8VO200 Hydraulic Pump Specifications

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

5. RITO HYDRAULIC 345B A8VO200 Pump: Key Features

• Core Rotating Components Inspected - the rotating group of every unit is checked before assembly to prevent premature failure.
• Precision Distribution-Pair Grinding - valve-plate mating surfaces are precision ground for high volumetric efficiency and lower internal leakage.
• Cost-Effective Repair Solution - restores full digging force at a fraction of the genuine pump price.
• Moderate Budget, Fast Payback - controlled investment with a quick return on working machines.
• No Patchwork Refurbishing - no welded housings or mixed used parts; a clean, verified assembly built to OEM parameters.

6. Common Hydraulic Pump Problems & Symptoms

• Weak digging force - worn pistons or valve plate reduce volumetric efficiency and output pressure.
• Slow machine response - internal leakage causes pressure-flow mismatch; the boom and arm feel sluggish.
• Abnormal noise (knocking/whining) - cavitation, worn bearings or loose couplings.
• Overheating - internal leakage generates heat; a serious issue in long mining shifts.
• Oil leaks - failed shaft or cover seals; replace with high-temperature-resistant seals.
• Sudden pressure drop - check the main relief valve setting and pump output together.

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; use the correct oil grade for mining duty.
• Check the suction filter and pump inlet regularly - restricted suction causes cavitation damage.
• Monitor oil temperature and system pressure; a sudden change is an early warning sign in continuous operation.
• During replacement, verify the part number (e.g., 216-0032) and coupling condition before installation.

8. Buying Guide: What to Check Before Buying

• Machine identification: exact model (345B / 345B L / 345B II / W345B II) and machine serial number.
• Old pump part number: read the plate on the failed pump and match it (216-0032 or the number stamped on your unit).
• Quality tier: choose genuine, OEM, aftermarket or rebuilt based on machine age, duty and budget.
• Packing and logistics: the 345B A8VO200 unit packs at 250 kg / 68 x 68 x 71 cm - confirm the freight plan (sea vs air) with your supplier.
• Heat and duty requirements: confirm the pump is built for continuous mining operation with effective heat dissipation.
• Warranty & support: confirm warranty terms, lead time and after-sales support before payment.

9. Real-World Case Study: 345B A8VO200 Pump Supply (Mining Operations)

RITO HYDRAULIC supplies the complete CAT 345B A8VO200 main pump (E345B A8V0200) built to OEM parameters for direct installation. Key product data: 200 cm³/rev axial piston design; core rotating components inspected; precision distribution-pair grinding for high volumetric efficiency; and no patchwork refurbishing - a cost-effective repair solution that restores full digging force.

Based on our export experience, buyers replacing a failed 345B main pump should confirm four things before ordering: the machine model and serial number; the part number on the failed pump (216-0032 or the number stamped on the plate); the quality tier with warranty terms; and the freight plan - a mining-class main pump packs at 250 kg / 68 x 68 x 71 cm, so sea freight consolidation is usually the most economical choice, while air freight suits urgent stoppages. With these confirmed, the correct unit ships quickly and installs without modification - keeping the excavator productive through long mining shifts.

10. FAQ - CAT 345B A8VO200 Hydraulic Pump

Q1: What hydraulic pump fits the Caterpillar 345B?

The main pump for the CAT 345B is a Rexroth-series A8VO200 axial piston pump (200 cm³/rev), supplied by RITO HYDRAULIC under product code E345B A8V0200 with OEM-parameter fit for direct installation.

Q2: What does A8VO200 mean?

A8VO200 is a Rexroth-series axial piston pump designation; the "200" indicates a nominal displacement of 200 cm³ per revolution.

Q3: What are the symptoms of a failing 345B main pump?

Weak digging force, slow machine response, abnormal pump noise, overheating hydraulic oil, external oil leaks and low system pressure are the most common warning signs.

Q4: Is the RITO E345B A8V0200 pump a direct fit for the 345B?

Yes. The pump is built to OEM parameters with high pressure-flow matching, precision distribution-pair grinding and inspected core rotating components, so it installs directly with rapid power response.

Q5: How much does a CAT 345B hydraulic 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.

Q6: Genuine or aftermarket - which should I choose?

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

Q7: What is the weight and packing size of the 345B A8VO200 pump?

The unit packs at approximately 250 kg with dimensions of 68 x 68 x 71 cm, which should be considered when planning sea or air freight.

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 plate on your failed pump (e.g., 216-0032) and check the machine model and serial number with your supplier before ordering.

Q10: Where can I buy a CAT 345B A8VO200 pump?

RITO HYDRAULIC supplies 345B A8VO200 main pumps (E345B A8V0200) with verified reference part numbers, OEM-parameter fit, warranty and export packing. Send your machine model and old part number for a quote.

11. Conclusion: Get the Right 345B Pump for Your Machine

The CAT 345B A8VO200 hydraulic pump (E345B A8V0200) is a direct-fit, OEM-parameter replacement built for continuous mining duty. Confirm your machine model, old part number and quality tier, and your excavator will be back to full digging force with rapid response and lower maintenance frequency. RITO HYDRAULIC offers verified fit, transparent warranty and fast export shipping. Send your machine model and old part number now.