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Genuine SINOTRUK HOWO T7H Cab Tilt Shaft Assembly AZ1642430219 – Heavy Duty Flip Pivot Axle Spare Part
Technical Description
Core Specifications
Direct OEM replacement for HOWO T7H/T5G trucks (2018-2025 models)
Forged alloy steel construction (42CrMo4 material, tensile strength ≥980MPa)
Precision-machined dimensions: φ55mm shaft diameter with ±0.01mm tolerance
Performance Features
Parameter
Value
Load Capacity
8,000kg dynamic load
Corrosion Resistance
Zinc-nickel plating (500h salt spray test)
Service Interval
150,000km under standard conditions
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1. Pre-Installation Preparation
Required Tools & Materials
50T hydraulic floor jack with safety lock
1/2" drive torque wrench (80-300Nm range)
LOCTITE 263 high-strength threadlocker
Molybdenum disulfide grease (NLGI Grade 2)
Vehicle Preparation
❶ Disconnect negative battery terminal
❷ Engage parking brake and chock rear wheels
❸ Tilt cabin to 45° position using hydraulic support system
2. Removal Procedure
Step 1: Disassembly Sequence
Remove 8x M16 flange nuts (120Nm torque) from pivot brackets
Detach hydraulic tilt cylinder linkage
Mark alignment positions with paint pen for reassembly reference
Step 2: Shaft Extraction
Apply controlled heat (150-200°C) to housing using induction heater
Use press-fit tool (PN HT-5512) with 10° alignment tolerance
Monitor extraction force (max 18T) to prevent housing deformation
3. New Assembly Installation
Critical Alignment Parameters
Measurement
Specification
Shaft parallelism
≤0.15mm/m
End play
0.05-0.15mm
Radial clearance
0.02-0.05mm
Installation Process
❶ Clean mating surfaces with acetone (ISO 11158 standard)
❷ Apply 1mm thick grease layer to bronze bushings
❸ Press-fit using guided installation tool (3-5T gradual force)
❹ Verify smooth rotation (0.8-1.2N·m rotational resistance)
4. Post-Installation Verification
Torque Specifications
Component
Torque Value
Pivot bolts
280Nm ±5%
Locknuts
160Nm + 45° turn
Bracket fasteners
180Nm
Functional Testing
Complete 5 full tilt cycles (0°→45°→0°)
Check for abnormal noise (<75dB at 1m distance)
Measure hydraulic pressure drop (≤15% baseline)
5. Maintenance Requirements
Initial re-grease after 500km operation
15,000km service interval with 30g grease replenishment
