SDLG VRT200 (A306) Transmission Service Manual – PDF
$26.95
Factory-issued service manual for the SDLG VRT200 (A306) electro-hydraulic power-shift transmission, co-developed with Volvo Construction Equipment.
Covers complete disassembly, assembly, testing, oil-flow diagnostics, clutch calibration, and electrical controls for LG956V / LG968 series wheel loaders.
Description
SDLG VRT200 (A306) Transmission Service Manual – Volvo-Co-Developed Power Shift Gearbox for LG956V LG968N Wheel Loader Maintenance PDF
IMAGES:
BOOKMARKS / TABLE OF CONTENTS (Formatted for SEO)
1️⃣ General
Safety Precautions & Workshop Practices
Symbols and Warning Marks
Tightening Torque of Common Bolts (M8 – M39 range)
2️⃣ Transmission System
Adaptable Models & Main Parameters (LG956V → LFT30)
Transmission Structure Overview
Torque Converter: Design • Oil Supply • Power Flow
Clutch Box: K1 K2 K3 K4 KF KR Clutch Assemblies
Transfer Case (PTO): Reduction & Parking Brake Integration
Transmission Principle Diagrams: Forward & Reverse Power Lines
Oil Supply & Lubrication: Flow Charts • Pressure Tests • Relief Valves
Electric Control System: LGTC-3 Controller • Solenoid Valve Logic • Kick-Down Function • Fault Diagnosis
3️⃣ Disassembly & Assembly
Required Tools & Gauges (list of 24 special tools)
Fit Clearances and Calibration Values
Step-by-Step Procedures: Torque Converter, Transfer Case, PTO, Clutch Box
Bearing & Seal Replacement Instructions
Pressure Testing and System Flushing Guidelines
4️⃣ Transmission Hydraulics and Electronics
Lubrication Valve & Counterbalance Valve Service
Cushion Valve Operation (for smooth shifts)
Pressure Ports T1–T7 Locations and Expected Values
Solenoid Valve Testing & Resistance Check (26 Ω ± 5 Ω)
Electrical Fault Diagnosis with Multimeter & Signal Chart
5️⃣ Appendices
Standard Tightening Torque Tables
Service Intervals & Oil Replacement Chart
Troubleshooting Checklist & Common Fault Codes
Complete Hydraulic and Wiring Diagrams
PRODUCT DESCRIPTION
The SDLG VRT200 (A306) Transmission Service Manual is the definitive factory reference for technicians servicing LG956V, LG958N, LG968 and LG969 wheel loaders. Jointly engineered by SDLG and Volvo, this next-generation power-shift transmission offers smooth, efficient shifting and extended durability.
This comprehensive guide details every aspect of maintenance — from hydraulic oil-flow diagnostics to electrical control testing, torque converter operation, and full gearbox disassembly and assembly. Illustrated diagrams, exploded views, and OEM specifications ensure accurate, efficient repairs in any workshop.
⚙️ Key Sections
Transmission Structure & Working Principle: Understand how torque is transmitted through converter, clutch box, and transfer case.
Step-by-Step Repair Procedures: Precision instructions for removing and assembling KF/KR and K1–K4 clutches, gears, bearings, and valves.
Hydraulic and Oil Flow Systems: Detailed schematics for oil supply, cooling, lubrication, and pressure testing ports (T1 – T7).
Electrical Control System: Covers LGTC-3 controller, solenoid valves (S1–S5), kick-down, neutral start interlock, and reverse signal functions.
Troubleshooting & Diagnostics: Solenoid resistance tables, pressure test values, and fault reset procedures for quick on-site service.
🛠️ Why This Manual Matters
This genuine manual eliminates guesswork by providing precise OEM-level information — torque values, fit clearances, and inspection criteria — ensuring each repair meets factory standards. Essential for any fleet maintenance team or independent technician handling SDLG or Volvo-licensed transmissions.
⚙️ FILE DETAILS
| Field | Information |
|---|---|
| Manual Title | VRT200 Transmission Service Manual |
| Manufacturer | Shandong Lingong Construction Machinery Co. Ltd (SDLG) |
| Co-Developed With | Volvo Construction Equipment (Sweden) |
| Transmission Model | VRT200 / A306 Electro-Hydraulic Power Shift |
| Applicable Machines | LG956V, LG958N, LG968V, LG968N, LG969N, LFT30 Wheel Loaders |
| Production Years | 2014 → 2023 |
| Type | Fixed-shaft Power-Shift Transmission (4 Forward / 4 Reverse) |
| Torque Converter | Single-stage three-component hydraulic converter |
| Converter Pressures | Inlet 0.8–1.0 MPa • Outlet 0.6–0.75 MPa |
| Gear Shift Pressure | 1.9 – 2.3 MPa |
| Gear Control | Electro-hydraulic via LGTC-3 Controller & Solenoid Valves |
| Kick-Down Function (KD) | Yes – forced downshift |
| Power Cutoff & Interlock | Integrated in control logic |
| Lubricating Oil Pressure | 0.12 – 0.35 MPa |
| Oil Type | SAE 10W / ISO VG 32 hydraulic oil (Shell Tellus 32 or equiv.) |
| Weight (approx.) | 420 kg |
| Service Interval | 500–1000 operating hours |
| File Format | Searchable PDF (English) |
| Pages | ≈ 160 diagrams & schematics |
| File Size | ≈ 13.2 MB |
| Includes | Torque converter system • Oil supply lines • Hydraulic valves • Electric controller LGTC-3 • Disassembly/assembly photos • Pressure test points • Troubleshooting flow charts |
