Covering everything from the intelligent transmission to the load moment indicator, this 609-page JCB Teletruk TLT25 service manual PDF (OEM #9803/3400 Issue 16) breaks down every system for your 1997-2006 TLT25 Teletruk. Inside, you get massive wiring diagrams, complete hydraulic schematics detailing pressure tapping points, and step-by-step diagnostic procedures for the entire drivetrain. Open to the mechanical sections to find full exploded views of the steering unit and extensive torque tables for metric and UNF fasteners. Lock down the steering and main hydraulic pump securing bolts to exactly 79 Nm, and verify your wheel nuts are torqued to 150 Nm before returning the lift to the yard. Downtime kills your bottom line. Grab this bookmarked digital reference, load it onto your shop tablet, and start turning wrenches.
What's Inside This JCB Teletruk 2.0-3.5T Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 5-18 | Identification (Vehicle Identification Number, Unit Identification, Typical Engine Identification Number) |
| Care & Safety | 19-26 | General Safety, Operating Safety, Maintenance Safety |
| Routine Maintenance | 27-54 | Fluids, Capacities and Lubricants, Service Schedules, Operator's Enclosure and Seat Belt, Cleaning the Machine, Greasing, Hydraulic System, Air Filter |
| Attachments | 55-64 | Hydraulic Hoses, Forks, Bucket, Quickhitch |
| Body & Framework | 65-86 | Access Procedures for Maintenance, Cab, Operator's Seat, Direct Glazing, Emergency Exit, Counterweight, Diesel Fuel Tank, Hydraulic Tank |
| Technical Data | 89-93 | - |
| Test Methods | 94-95 | - |
| Schematic | 96-164 | Electrical Power and Ignition, Starting System, Engine Management, Braking System, Transmission and Drive System |
| Battery | 165 | - |
| Alternator | 166-167 | - |
| Starter Motor | 168-169 | - |
| Load Moment Indicator | 170-183 | Lmi Calibration, Test Weights, Fault Code Diagnostics, Psion Diagnostic Tool Interface |
| Harness Data | 184-378 | Wiring Harness Repair, Wire Identification, Wire Tracing, Mainframe Harness Connectors, Harness Diagrams |
| Controls | 379-472 | Torque Convertor Response (Tcr), Intelligent Transmission (It), Psion Diagnostic Tool, Sensor Calibration and Parameters, Speed Sensors |
| Hydraulics | 473-543 | Technical Data, Hydraulic Contamination, Schematics, Pressure Tapping Points, Descriptions, Oil Cooler, Pumps |
| Transmission | 544-575 | Moving a Disabled Machine, Wheels and Tyres, Start-Up, Drive Motors, Transmission Pump, Rear Axle, Spring Plunger Shimming Procedure |
| Brakes | 576-577 | Brake Pedal Removal and Replacement, Brake Pedal Potentiometer Adjustment, Brake Pressure Reducing Valve, Park Brake Dismantling, Park Brake Assembly, Park Brake Test |
| Steering | 578-589 | Hydraulic Steering Unit, Power Track Rod |
| Engine | 590-609 | Technical Data, Radiator, Diesel & Lpg Engine, Lpg Fuel System |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Wheel nuts torque | 150 Nm (110 lbf ft) | p. 549 |
| Steering/Main Hydraulic Pump securing bolts (B) | 79 Nm (58 lbf ft, 8 kgf m) | p. 512 |
| Steering/Main Hydraulic Pump securing bolts (E) | 90 Nm (66.5 lbf ft, 9 kgf m) | p. 512 |
| Hoses Screwed onto Adaptors (1/8” BSP) | 14 Nm (10 lbf ft) | p. 8 |
| Hoses Screwed onto Adaptors (1/4” BSP) | 24 Nm (18 lbf ft) | p. 8 |
| Electrolyte level in each cell | 6 mm (0.25 in.) above the plates | p. 38 |
| Specific Gravity at 15 °C (60 °F) - Fully Charged (Ambient temp up to 27 °C) | 1.270 - 1.290 | p. 165 |
| Wire splice dimension | 7mm | p. 184 |
| Drive Motors hydraulic connections | 44-50 Nm (33-37 lbf ft, 4.6-5.1 kgf m) | p. 553 |
| Drive Motors cap screw M10 x 30 | 56 Nm (42 lbf ft, 5.8 kgf m) | p. 553 |
| Air Filter inner element replacement interval | at least every third time the outer element is changed | p. 43 |
| Engine oil filter replacement interval (new engine) | after the first 50 operating hours | p. 592 |
JCB Teletruk 2.0-3.5T Common Problems This Manual Covers
JCB TLT25 boom lift cylinder creeps down under load or hydraulic reach becomes weak and jerky p. 475
Test the loader valve block for internal leakage. Verify total leakage across all spools remains under 35 cc/min at 207 bar as noted on page 475. If rebuilding the lift cylinder, refer to the torque specification in the Hydraulics section before reinstalling the piston head.
Manual Section: HydraulicsIntermittent power loss and machine will not start after sitting idle in cold weather p. 165
Inspect the battery cells and top off fluid to maintain an electrolyte level 6 mm above the plates. Check the specific gravity on page 165. A fully charged battery in ambient temperatures up to 27 °C must read between 1.270 and 1.290 to crank the engine.
Manual Section: ElectricsPark brake slips on inclines and machine will not hold safely during loading operations p. 559
Remove the park brake assembly and measure the clamped friction plates against the specification given in the Brakes section. Reassemble the unit and conduct the park brake pressure test on page 559 using a dedicated gauge to confirm correct hold pressure.
Manual Section: BrakesDiesel engine overheats and derates under heavy load during continuous material handling cycles p. 44
Drain the cooling system and flush the radiator. Refill the system to the capacity specified in the Routine Maintenance section using a fresh 50% antifreeze solution. Check page 44 for proper mixing guidelines. Bleed all air from the upper hoses before returning the machine to service.
Manual Section: Routine MaintenanceSteering feels heavy and main hydraulic pump makes a loud grinding noise at high RPM p. 512
Connect a pressure gauge to the unloader valve and test the system at idle. Adjust the valve to the pressure specified in the Technical Data for your model. If installing a pump repair kit, tighten the steering and main hydraulic pump securing bolts to 79 Nm as specified on page 512.
Manual Section: HydraulicsFrequently Asked Questions
How to tilt cab on old JCB TLT25?
To tilt the cab on older JCB TLT25 machines (up to Serial No. 788759), first remove the 'R' clip C and withdraw the tilt lock pin D. Then, use a 19 mm socket to turn screwjack E anti-clockwise, tilting the enclosure forward onto its stops. Take extreme care during this operation.
What is the lift capacity of a JCB TLT25?
The manual indicates test weights for Load Moment Indicator (LMI) calibration for a 2.5 Tonne machine. For standard forks with a hook on sideshift, the test weight is 1000kg, and with a Quickhitch, it is 750kg. This suggests the machine is rated for 2.5 tonnes.
What is the maximum lift height of a JCB Teletruk TLT25?
The maximum lift height is related to the Boom Lift ram stroke. For 2.0T, 2.5T machines, the Boom Lift stroke is 769 mm (30.3 in). For 3.0T and 3.5T machines, the Boom Lift stroke is 755 mm (29.7 in). For 3.0D HL machines, the Boom Lift stroke is 801 mm (31.5 in).
How to reset JCB TLT25 fault codes
If any fault codes are displayed on the Load Moment Indicator (LMI), turn the ignition key to OFF and then ON again. If the fault does not clear, refer to the Diagnostic Tests section for further troubleshooting. For Intelligent Transmission (IT) errors, the red LED will extinguish upon leaving the Psion - Susmic communication link and starting the engine, confirming no errors exist.
How will I receive this Service Manual?
Instant PDF download. You get the full 609-page searchable Service Manual immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Can I print this manual?
No restrictions at all. Print individual pages, full chapters, or the entire manual. The PDF is completely unlocked.
Does this JCB TLT25 & variants manual include wiring diagrams?
Yes, full electrical schematics are included with wire colors, connector locations, and circuit descriptions.
Document Quality
This document is a scanned PDF with an OCR layer, allowing you to search and copy the full text. The text quality is consistently crisp and easy to read throughout the manual. Diagrams and illustrations are raster images, but they are generally clear with readable labels, making them useful for reference. Pages are clean with no noticeable scan artifacts, stains, marks, or skewed content. Several "This page intentionally left blank" pages are present as filler.
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