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John Deere 640L, 648L and 748L Skidders Pdf Diagnostic, Operation and Tests Service Manual (TM13135X19)
John Deere 640L, 648L and 748L Skidders Pdf Diagnostic, Operation and Tests Service Manual (TM13135X19)
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John Deere 640L, 648L and 748L Skidders Pdf Diagnostic, Operation and Tests Service Manual - TM13135X19
When a John Deere skidder develops a warning code, loses hydraulic performance, behaves differently in the transmission, or has a winch or grapple function that is not responding correctly, the useful question is not simply “what part should I replace?” TM13135X19 is built around finding that answer through diagnostic trouble codes, system theory, operational checks, adjustments, and component testing for the 640L, 648L and 748L Skidders.
Manual Information
| Models | John Deere 640L, 648L, 748L Skidders |
|---|---|
| Manual Number | TM13135X19 |
| Document Type | Diagnostic, Operation and Test Technical Manual |
| PIN Coverage | 640L: 1DW640L___C666893–690813 / 1DW640L___D679126–690813; 648L: 1DW648L___C666893–690813 / 1DW648L___D679126–690813; 748L: 1DW748L___C666893–690813 |
| Publication Date | 12 OCT 2020 |
| Language | English |
| Format | |
| Page Count | Digital editions are listed with different page counts; the referenced edition is commonly listed at 1,394 pages |
Start With the Symptom, Then Test the System
TM13135X19 is more than a collection of specifications. It is arranged to help technicians move from a machine complaint or diagnostic code into the appropriate system checks. The manual covers the electronic controllers first, followed by dedicated testing for the engine, electrical system, powertrain, hydraulics, winch, and heating and air conditioning.
- Diagnostic trouble codes: Engine Control Unit (ECU), Hydraulic Valve Controller (HVC), Left Joystick Controller (JSL), and other applicable electronic control functions.
- Engine diagnostics: theory of operation, system diagrams, diagnostic information, adjustments, and engine performance tests.
- Electrical troubleshooting: wiring and system diagrams, monitor operation, diagnostic test information, adjustments, and electrical checks.
- Powertrain: transmission operation, drivetrain diagnostics, system testing, adjustments, and performance checks.
- Hydraulic system: hydraulic theory, circuit diagrams, diagnostic procedures, pressure-related checks, adjustments, and tests.
- Winch: winch operation, hydraulic controls, system diagnostics, adjustments, and testing.
- Heating and air conditioning: HVAC theory, diagrams, diagnostic information, adjustments, and operating tests.
Diagnostic Areas at a Glance
| System | What You Can Check |
|---|---|
| Electronic Controls | Controller DTCs, communication-related faults and machine control functions |
| Engine | Operating theory, system diagrams, diagnostic checks, adjustments and performance tests |
| Electrical | System diagrams, monitor operation, diagnostic test box information and electrical testing |
| Powertrain | Transmission and drivetrain operation, diagnosis, adjustments and tests |
| Hydraulics | Pump and valve operation, hydraulic circuits, diagnostics, adjustments and system tests |
| Winch | Winch controls, hydraulic operation, troubleshooting and performance testing |
| HVAC | Heating and air-conditioning operation, diagnostics, adjustments and tests |
640L, 648L and 748L Information
| Engine | John Deere PowerTech 6.8 L, 6-cylinder diesel; configuration varies by emissions level |
|---|---|
| Gross Power | 640L / 648L: up to 163 kW (218 hp); 748L: up to 181 kW (243 hp), configuration dependent |
| Transmission | Continuous Variable Transmission (CVT) |
| Maximum Travel Speed | Up to 24.74 km/h (15.37 mph) with 30.5-32 tires |
| Main Hydraulic Pump | Open-circuit, variable-displacement axial-piston pump |
| Maximum Pump Displacement | 60 cc/rev |
| Electrical System | 24 V with two 12 V batteries; 150 A alternator |
| Standard Fuel Capacity | 640L / 648L: 342.2 L; 748L: 391.8 L |
| Hydraulic Reservoir | 123.6 L |
| Winch | 640L: 4000; 648L / 748L: 6000 two-speed configuration |
Why the Winch and Hydraulic Sections Matter
On a forestry skidder, a problem with the winch, grapple, blade, steering, or transmission can quickly become a productivity issue. TM13135X19 lets you work through the hydraulic and control side of those functions before moving into component replacement. The dedicated winch section is particularly relevant when line speed, control response, hydraulic operation, or winch performance is not behaving normally.
Use It Alongside the Correct Repair Manual
TM13135X19 is the diagnostic, operation and test publication. It is intended to identify faults and verify system performance. For component removal, disassembly, repair and reassembly, the related repair publication is TM13136X19 for the applicable 640L, 648L and 748L serial ranges. This distinction is useful when choosing the right manual for a repair job.
PDF Manual Features
- English-language John Deere skidder diagnostic manual
- Searchable PDF with bookmarks and organized sections
- Diagnostic trouble code information
- System diagrams and electrical information
- Operational checkout and troubleshooting procedures
- Engine, powertrain and hydraulic testing
- Dedicated winch diagnostic and test information
- Printable pages for workshop use
- Zoom in/out for detailed diagrams
- Instant PDF access after purchase
- Easy to save and reference during field or workshop troubleshooting
- Lifetime access to the purchased manual
Frequently Asked Questions
Which John Deere skidders does TM13135X19 cover?
TM13135X19 covers the 640L, 648L and 748L Skidders within the specified C- and D-series PIN ranges listed in the manual.
Does TM13135X19 include diagnostic trouble codes?
Yes. The diagnostics section includes controller-specific diagnostic trouble code information, including the Engine Control Unit and Hydraulic Valve Controller.
Can this manual be used for hydraulic troubleshooting?
Yes. The hydraulic section includes theory of operation, system diagrams, diagnostic information, adjustments, and tests for investigating hydraulic performance problems.
Does it cover the skidder winch?
Yes. TM13135X19 has a dedicated winch section covering its operation, system information, diagnostics, adjustments, and testing procedures.
Is TM13135X19 the repair manual?
No. TM13135X19 is the Diagnostic, Operation and Test Technical Manual. The related repair manual is TM13136X19, which is intended for component repair and reassembly.
