SDLG L936 & L938 Brazil Wheel Loader Complete Service Manual 2938003557 – PDF Workshop Repair Guide

Description

SDLG L936 & L938 Brazil Wheel Loader Service Manual — Document 2938003557

This is the complete SDLG L936 / L938 wheel loader service manual issued for the Brazil market, covering the full maintenance and repair scope of both machines across nine major chapters. The document carries the manufacturer number 2938003557 and runs to 298 pages of procedures, tightening-torque tables, diagnostic codes, hydraulic schematics and exploded views. It is written for technicians who need the correct values, sequences and inspection criteria rather than a general overview — every chapter goes straight into the work, and the Chinese title 维修手册 is printed alongside the English SERVICE MANUAL on the cover.

File Details

• Manual type: Service Manual / 维修手册
• Brand: SDLG (Shandong Lingong Construction Machinery Co., Ltd.)
• Models covered: L936, L938 (Brazil)
• Document number: 2938003557
• Language: English
• Page count: 298
• File format: PDF

Chapters Covered

• 0 — Safety & Environment
• 1 — General
• 2 — Engine System
• 3 — Electrical & Information System
• 4 — Transmission System
• 5 — Brake System
• 6 — Steering System
• 7 — Frame, Tire and Working Device
• 8 — Cab & Air Conditioner System
• 9 — Working Hydraulic System

Safety, Environment and General Service Criterion

Chapter 0 sets the service position, warning-sign placement, hoisting and support rules, tyre inflation precautions, battery handling, refrigerant handling, and the decontamination steps after an accident or fire. Chapter 1 then defines the measurement discipline for the whole manual: commercial bolt tightening torque by strength grade, tightening torque for joints with copper seal gaskets or O-ring seals, 24° taper seal pipe joint torque, hinged bolt torque, unit conversion tables for length, area, volume, weight and pressure, the symbols used to flag safety-critical operations, and the visual-inspection / measurement criteria for deciding whether a bearing, gear, spline, shell, pin or seal can be reused. The hydraulic oil replacement trigger conditions (milky, acid smell, yellow or muddy oil) are listed here too.

Engine System — Weichai WP6G125E332 and Yuchai YC6J125-T300

The engine chapter covers the two T3 engines fitted to the L936/L938 Brazil machines. Key maintenance parameters for the WP6G125E332 and the YC6J125-T300 are given side by side: rated speed, idle speed, intake and exhaust valve clearance, and rated-speed oil pressure. Detection procedures describe how to connect the special diagnostic tool to the failure diagnosis port on the Weichai and Yuchai engines, and the chapter carries the full failure-code tables for both — accelerator pedal circuit faults, crankshaft and camshaft signal errors, injector circuit faults, rail pressure sensor faults, coolant and oil temperature sensor faults, CAN communication faults, and the J1939 SPN/FMI mapping. There is also a plain-language fault-diagnosis section for hard-start, low power, abnormal exhaust, oil pressure problems and high coolant temperature.

Electrical & Information System

This chapter opens with the 24 V electrical system specification, maintenance instructions and the auxiliary starting procedure. It then documents the instrument panel I-ECU (T3 engine) — the LCD normal and fault display modes, gauge ranges, warning lamps and indicator logic — followed by pin functions and the internal wiring diagram. The Weichai and Yuchai engine control units (ECU) are documented connector by connector, including every X1 pin, its abbreviation and function. The chapter then covers the polymorphic fuel-saving switch, the electronic accelerator pedal and its APS1/APS2 voltage relationship, the maintenance-free battery, the 28 V-70 A alternator for both engines, the starter, the starting switch gear/terminal truth table, the fuel level sensor resistance chart, the power switch, the pressure switches (transmission, reverse, brake, parking brake, service brake), the torque converter oil temperature sensor, the wiper and wiper motor, and a full machine line-number-to-function comparison table plus the front-frame, rear-frame and instrument panel wiring diagrams.

Transmission System

Two transmission families are covered: the A30X / BX50 planetary power-shift transmission (single-stage four-element double-turbine torque converter, two forward and one reverse, 1.1–1.5 MPa working pressure) and the YD13 fixed-shaft power-shift transmission (single-stage three-element single-turbine converter, four forward and three reverse, 1.3–1.7 MPa working pressure). The chapter gives the pressure-detection tooling and procedure, the pressure-adjustment method using the pressure-regulating spring or shims, the gear-selector and solenoid-valve detection methods with the YD13 solenoid/clutch logic table, and a lengthy fault-troubleshooting section for low pressure, no drive, slipping, high torque-converter oil temperature, metal in the oil pan, chaotic gear engagement, sudden braking on shifts and abnormal noise. The transmission disassembly and assembly flow charts, the transmission shaft precautions and the drive-axle fault diagnosis (noise, heat, oil leakage) close the chapter.

Brake and Steering Systems

The brake chapter describes the full-hydraulic wet braking system, the two-way liquid filling valve and its work principle, the energy accumulator (nitrogen charging method, air-leak inspection, disassembly precautions), the foot braking valve (installation, dismantling and assembly steps with torque values), the wheel-side brake, the brake bleeding procedure, and the complete parking braking system including the braking valve block, the parking brake cylinder and the fault table for insufficient foot braking, no gear engagement, parking brake faults and energy-accumulator issues. The steering chapter covers the load-sensing steering system at 16 MPa, the steering pump models (CBGj3100/1010-XF duplex for the L936, CBGj3100A/2063/2063A for the L938 depending on engine), the priority valve VLH-240S-14, the steering gear BZZ6-630A and its technical parameters, the steering cylinder, the steering system exhaust procedure, pressure measurement and adjustment (including safety-valve adjustment), and a large fault-diagnosis matrix for heavy steering, crawl, no limiting position, no return and wheel vibration.

Frame, Tire, Working Device and Cab / Air Conditioner

Chapter 7 covers the articulated frame and the Z-shape inversion six-bar working device. It gives the disassembly and assembly of the balance weight, the frame joint (upper and lower), the bearing replacement procedure, the front and rear wheel removal with the wheel-nut tightening torque, and the disassembly and assembly of the connecting bar, rocker arm and boom with the washer adjustment requirements for typical joints (0.5–1.5 mm sleeve clearance, 1–2 mm joint-bearing clearance). Chapter 8 covers the cab lift sequence and the air conditioner system — heating and refrigeration principles, the air conditioner control wiring, fan control, fresh-air control, routine checks, maintenance instructions, refrigerant oil quantities per replaced component, refrigerant charging method, and a common fault diagnosis and troubleshooting flow for no refrigeration, insufficient cooling and intermittent operation.

Working Hydraulic System

The final chapter documents the working hydraulic system at 16 MPa, its schematic, the hydraulic oil tank, the duplex working pump (125/16 for L936, 100/16 for L938), the D32A-16 pilot-control multiway valve, the pilot control valve, and the measurement and adjustment procedures for system pressure, overload pressure of the rotating bucket cavity, primary and secondary pilot-control pressure, safety-valve pressure, and cylinder settlement. Troubleshooting tables cover bucket falling, boom settlement, slow lift, inability to lift, blow bucket movement and inability to move the bucket, with the corresponding internal-leakage, valve-sticking and relief-valve causes.

Why this L936 / L938 Service Manual Belongs in the Workshop

Whether you are servicing the Weichai WP6G125E332 or the Yuchai YC6J125-T300 in a Brazil-market L936 or L938, diagnosing a transmission that will not build pressure, tracking a fault code from the engine ECU, resetting the instrument panel I-ECU, chasing a hydraulic leak through the pilot-control circuit, or simply verifying the correct torque for a joint body or a wheel nut, this manual gives you the value, the procedure and the acceptance criterion in one document. The torque tables, unit-conversion tables, torque-converter and transmission pressure windows, pilot-control pressure targets and engine fault-code definitions are all printed in the manual’s own wording, so the specification you apply on the machine matches the specification SDLG built it to.

IMAGES PREVIEW

The file is delivered as an instant PDF download — no shipping, no waiting, no printed binder to lose. Open it on a laptop, tablet or phone at the machine, print only the pages you need for the job, and keep the full 298-page document on hand for the next L936 or L938 that rolls into the bay. SDLG L936 L938 Brazil Service Manual 2938003557 — the complete factory service documentation for both machines, ready when the work starts.