1. Common Types of Bulldozer Hydraulic System Failures

(1) Insufficient Pressure Failure

· Possible causes: Relief valve malfunction, hydraulic pump wear, clogged suction line

· Symptoms: Weak blade lift, sluggish ripper movement

(2) Abnormal Movement Failure

· Possible causes: Control valve sticking, hydraulic cylinder internal leakage, loose pipe connections

· Symptoms: Jerky movements, "creeping" behavior

(3) Overheating Failure

· Possible causes: Clogged cooler, contaminated fluid, system overload

· Symptoms: Oil temperature exceeding 80°C, accelerated seal degradation

(Note: These three categories account for over 75% of bulldozer hydraulic system failure cases.)

2. Systematic Diagnostic Process

When bulldozer hydraulic system failures occur, follow these steps:

Step 1: Basic Checks

(1) Hydraulic oil level (top up to mark if low)

(2) Fluid contamination (visual check for cloudiness/metal particles)

(3) Pipe connections (locate leaks, tighten loose fittings)

Step 2: Pressure Testing

(1) Use gauges to measure main pump output (compare with specs)

(2) Test safety valve opening pressure (adjust if >10% deviation)

Step 3: Component Inspection

(1) Disassemble hydraulic pump (check gear/piston wear)

(2) Clean control valve (remove debris with kerosene)

(3) Test cylinders (pressure-holding test for internal leaks)

3. Preventive Maintenance Recommendations

To reduce bulldozer hydraulic system failures:

(1) Fluid Management: Change oil every 500 hours, use OEM filters

(2) Cleanliness Control: Clean cooler fins post-operation to prevent dust buildup

(3) Regular Testing: Monthly oil quality checks with contamination analyzer

Hengwang HW32D Bulldozer Hydraulic System Advantages

The HW32D addresses common bulldozer hydraulic system failure issues with:

(1) Rexroth high-pressure piston pump (30% more stable pressure)

(2) Armored hoses standard (reduces external leakage risks)

(3) Smart thermal control (maintains 50-75°C optimal range)

(4) Ideal for mining and heavy earthmoving

For complex failures, contact manufacturer support.