Gear box removal and dismantling are worked through in detail in this 474-page Manitou MLT 523 repair manual PDF, which covers four MLT series telehandler variants in one book. Hydraulic circuit diagrams trace the steering, lifting, compensation and jib feed circuits, while wiring diagrams support the electro-proportional control repair section on electric control, hydraulic control and flow rate regulation. Valve bank work runs from disassembly through spool O-ring and intersection seal servicing, the brake chapter takes in the master cylinder and trailer braking system, and the lifting and tilt cylinder chapters finish with seal replacement and refitting. Refill the transmission with 8.5 L of oil and confirm converter intake pressure at 7.5 bar. For a cylinder rebuild, your rod nut figure is 260 to 290 Nm. Bookmarks take you straight to the axle, starter motor or main relief valve pages, and the text layer lets you search a term instead of paging through all 474.
What's Inside This Manitou MLT 626, 725, 523, 526 Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| Engine | 4-17 | Technical Characteristics, Engine Removal |
| Transmission | 18-63 | Removal of Gear Box, Dismantling the Gear Box, Transmission Maintenance |
| Brake | 64-83 | Dismantling the Master Cylinder, Trailer Braking System |
| Telescopic Boom | 84-85 | Tilt Cylinder, Attachment Circuit, Telescope Cylinder, Boom Assembly, Compensating Cylinder |
| Axle Assembly - Axle | 86-92 | Dismantling the Boom, Dismantling the Axle |
| Electricity | 93-101 | Dismantling the Starter Motor |
| Valve Bank Dismantling | 102-121 | Valve Bank Disassembly, MLT 626/725, MLT 523/526, Turbo Models |
| Electro-Proportional Control Repair | 122-132 | Basic Principle, Electric Control, Hydraulic Control, Flow Rate Regulation |
| Valve Bank Components and Assembly | 133-141 | Valve Bank Exploded View, Spool O-Ring Servicing, Intersection Seal Servicing, Load Check Valve |
| Lifting Cylinder Dismantling | 142-157 | Lifting Cylinder Disassembly, Refitting, Seal Replacement |
| Tilt Cylinder Dismantling | 158-175 | Tilt Cylinder Disassembly, Refitting, Seal Replacement |
| Pressures and Flow Testing | 176-206 | Pressure Test Bench, Checking Hydraulic Pressure Levels, Main Relief Valve, Compensating Relief Valves |
| Hydraulic Diagrams | 207-332 | Hydraulic Circuit Diagrams, Steering Circuit, Lifting Circuit, Compensation Circuit, Jib Feed Circuit |
| Checking Hydraulic Pressure Levels | 333-438 | Hydraulic Circuit Flow Rates, Steering Circuit, Drive Assembly and Intermediate Bracket |
| Basic Electric Circuit | 439-474 | Concept of the Circuit Diagram, Troubleshooting |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Transmission oil capacity | 8.5 L | p. 92 |
| Transmission oil operating temperature | 85-90°C | p. 42 |
| Converter pressure intake | 7.5 bar | p. 43 |
| Oil pump pressure | 10.5 - 12.6 bar | p. 43 |
| Cylinder rod nut torque | 260-290 Nm | p. 110 |
| Seal preheating temperature | 40-60 °C | p. 110 |
| Engine 1004.4/1004.4 T Crankcase capacity | 7.6 L | p. 9 |
| Engine 1004.4/1004.4 T Cooling system capacity | 15 L | p. 9 |
| Front Axle Differential Oil Capacity | 8.5 L | p. 92 |
| Rear Axle Differential Oil Capacity | 8.5 L | p. 92 |
Manitou MLT 626, 725, 523, 526 Common Problems This Manual Covers
Manitou MLT 626 725 523 526 telehandler transmission does not work in either direction
Check the oil level on the dipstick with the engine idling, as page 42 specifies. Test main pressure (Test 1) against 10.5 to 12.6 bar pump pressure listed on page 43. If pressure is low, inspect for a jammed valve, obstructed strainer, damaged pump seal, broken pump driving pawls, an open cut-off valve, or a forward/reverse slide-valve not operating.
Manual Section: Transmission Hydraulic System Troubleshooting p. 79Transmission drives in one direction only, forward or reverse clutch not engaging
Test forward and reverse clutch relief pressure using Tests 3 and 4 against 9.0 to 10.5 bar, as listed on page 43. If one side reads low, check for the slide-valve jammed in one direction, a leaking control valve seal, or a leaking clutch plunger, seal or plunger ring (page 81). Normal pressure with slippage points to abnormal clutch wear.
Manual Section: Transmission Hydraulic System Troubleshooting p. 79Transmission oil temperature runs excessive during loaded work, well above normal operating range
Check the oil level on the dipstick at idle; too low or too high will overheat it, and page 42 warns against filling above the upper mark. Inspect the cooling system for restriction. Test main pressure and converter flow (Tests 1 and 2) per page 80, and stop operators overusing the cut-off valve or stalling. Normal operating temperature is 85 to 90°C.
Manual Section: Transmission Hydraulic System Troubleshooting p. 80Transmission case leaking oil from bearing caps, covers, gaskets, seals or the drain plug
Check the oil level first; overfilling is a listed leak cause, and page 42 says never fill above the upper dipstick mark. Verify the correct lubricant, then inspect the transmission breather for plugging, look for loose or missing bolts, broken or shifted gaskets, defective bearing cap seals, cracked castings, and a loose drain plug, following page 84.
Manual Section: Transmission Mechanical Checks p. 84Hydraulic movements not responding when the electro-proportional remote control lever is moved
Measure control voltage at 12 volts, with signal voltage at 6 volts in neutral and 3 or 9 volts with the lever in use, per page 280. The neutral switch cuts power in neutral, so push the lever slightly to energize it. Check the circuit for shorting or earthing, and never swap the black on-off connectors. Make adjustments in manual control mode, never with controls live (page 288).
Manual Section: Electro-Proportional Control Repair p. 280Alternator does not deliver charge, or shows low or irregular output with engine running
Disconnect the battery before removing the alternator, and never disconnect the alternator or regulator outlets with the engine running (page 427). Note the wire colour coding before unplugging, then remove the brush assembly carefully, turning it outward to protect the brushes. Test the brush holder with an indicator lamp by touching each brush with the test leads, per page 431.
Manual Section: Alternator Troubleshooting p. 427Frequently Asked Questions
What are the replacement specifications for engine oil and fuel filters on the Manitou MLT 626, 725, 523, 526?
The manual specifies a crankcase capacity of 7.6 liters for the Perkins 1004.4 engine. It is recommended to change the oil after the first 50 hours of work, and then every 900 hours maximum. The fuel circuit requires an injection pump nut torque of 8.2 mkg and an injector locking screw torque of 1.2 mkg. p. 9
What is the tightening torque for the engine cylinder head screws on the Manitou MLT 626, 725, 523, 526?
The engine cylinder head screws must be tightened in three steps to a final torque of 11 mkg. After reaching this torque, the screws must be tightened further by an angle based on their position: 150° for screw (S), 180° for screw (M), and 210° for screw (L). p. 8
What is the correct procedure for checking the transmission oil level?
The transmission oil level must be checked using the oil gauge dipstick while the engine is idling. Do not overfill above the upper mark, as this can cause oil splashing through the pinions, leading to emulsion, oil deterioration, and external leaks. p. 42
What is the correct torque for the transmission control assembly screws on a Manitou MLT 626, 725, 523, 526?
The transmission control assembly screws should be tightened to a torque between 1.8 and 3.2 Kgm (13 - 23 lb ft). p. 51
What is the required backlash for the final drive?
The final drive backlash for the MLT 626/725 series should be set between 0.25 and 0.35 mm. p. 22
Is this Manitou MLT 626 manual a download or a disc?
Delivery is instant: a 474-page searchable PDF is yours the second checkout clears. Laptop, tablet, or phone, all fine.
Does this Manitou MLT 626 manual allow printing?
You can. Print the sections you want for your own use and keep the file as your backup.
