Written for the Mitsubishi FD40N1 series of diesel forklift trucks, this 221-page Operator Manual (OEM 99730-7A130) covers five capacity variants in both the MC lever and FC control box configurations. Your copy of the Mitsubishi FD40N1, FD45N1, FD50CN1, FD50N1, FD55N1 operator manual PDF goes through the meter panel icon by icon, including what each diagnostic code means when it shows on the LCD mid-shift. Maintenance takes up close to a third of the book and is scheduled by the hour meter, from the 10-hour pre-start check to the 2000-hour service, with lift chains, tilt cylinders, interlocks and the inching pedal on the inspection list. Change the hydraulic oil every 2000 service hours or 12 months, and replace the return oil filter at 200 service hours or one month after delivery, then check/replace it as part of the 1000 service hour maintenance. Second shift, a code on the display, nobody on site to ask. The PDF is bookmarked and searchable, and it shows where the serial number and capacity plate are, so you give the parts counter the right numbers first time.
What's Inside This Mitsubishi FD40N1–FD55N1 Series Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety Rules for Forklift Truck Operators | 4-44 | Warning Decals Location, Description of Danger Warning and Caution Decals |
| Know Your Forklift Truck | 45-101 | Serial Number and Capacity Plate, Electrical Components, Model View (- Overview) |
| How to Avoid a Tipover; How to Survive One | 102-111 | Know What Forklift Truck Stability Is, Center of Gravity, Stability and Center of Gravity, Forklift Truck Stability Base, Capacity, Capacity Plate (- Overview, Sample) |
| Refueling | 112 | Diesel Engine |
| Operation | 113-125 | New Forklift Truck Break-In, Before Starting Engine (- Overview), Starting Diesel Engine |
| Operating Techniques | 126-139 | Stacking Methods (- Overview, Stacking Different Size Loads, Stacking Small Identical Loads, Stacking Large Identical Loads), Handling Loads Safely (- Overview, Fork Spread) |
| Storing the Forklift Truck | 140-141 | End of Each Shift Storage, Long Term Storage (- Overview, Storage Within Three Months, Storage Exceeding Three Months) |
| Transportation Hints | 142-144 | Care in Cold Weather, Care in Hot Weather |
| Troubleshooting | 145-155 | Stalled Engine, Starting with Jumper Cables, If Lights Won't Glow (How to Check Fuses and Lights), If the Engine Coolant Temperature Gauge Shows Red Zone |
| Maintenance | 156-221 | General, Inspection Precautions |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Air cleaner element replacement interval | Every 1000 service hours or 6 months | p. 145 |
| Engine oil and engine oil filter replacement interval | Every 500 service hours or 3 months | p. 145 |
| Hydraulic oil replacement interval | Every 2000 service hours or 12 months | p. 145 |
| Hydraulic tank return filter replacement interval | Every 3 months or every 500 hours | p. 145 |
| Engine oil replacement interval (0 to 0.2% sulfur) | 500 hrs. or 3 months | p. 162 |
| Transmission oil capacity | 17 L | p. 213 |
| Tightening torque for tilt cylinder socket bolts | 262 ± 13 N·m (26.7 ± 1.3 kgf·m) [193.4 ± 9.6 lbf·ft] | p. 186 |
| Inching pedal free play | 3 to 6 mm (0.1 to 0.2 in.) | p. 187 |
| FD40N1 | ||
| Lift chain adjustment nut tightening torque | 98 to 196 N·m (10 to 20 kgf·m) [72 to 144 lbf·ft] | p. 183 |
| Tilt cylinder socket bolt tightening torque | 262 ± 13 N·m (26.7 ± 1.3 kgf·m) [193.4 ± 9.6 lbf·ft] | p. 186 |
| 4 to 4.5 ton models | ||
| Lift chain elongation limit (20 links) | 518 mm (20.4 in.) | p. 182 |
| 5 to 5.5 ton models | ||
| Lift chain elongation limit (20 links) | 648 mm (25.5 in.) | p. 183 |
Mitsubishi FD40N1–FD55N1 Series Common Problems This Manual Covers
Mitsubishi FD40N1 through FD55N1 diesel engine won't start, floods, or stalls during shift startup
Check the fuel level gauge and refuel per the Diesel Engine refueling section on page 112, then follow the Starting Diesel Engine procedure on page 115. If the engine won't start, follow the Engine Won't Start steps on page 116; if it is flooded, follow the steps on page 117. If it stalls, check the stall causes listed on page 146, and if the battery cannot crank the engine, use the Starting with Jumper Cables procedure on page 146.
Manual Section: Engine Troubleshooting p. 116Engine coolant temperature gauge needle sitting in the red zone during normal operation
Bring the truck to a safe stop as soon as the gauge reaches the red zone, then work through the coolant temperature procedure in the Troubleshooting section before returning to work. Ahead of summer, review the Care in Hot Weather guidance on page 142 so the truck is prepared before temperatures climb on later shifts.
Manual Section: Engine Coolant Temperature TroubleshootingTorque converter oil temperature warning icon glowing on the display during travel
Stop the truck in a safe spot and follow the torque converter oil temperature procedure on page 151 before driving again. Check the transmission oil level, and when topping up or changing oil, note the transmission oil capacity of 17 L (4.5 US gal.) listed on page 213 for all models.
Manual Section: Torque Converter Oil Temperature Troubleshooting p. 151Forklift won't move or won't change direction with the engine running
Follow the truck movement troubleshooting steps on page 151 before calling for service. Measure inching pedal free play and confirm it falls within 3 to 6 mm (0.1 to 0.2 in.) per page 187. Check transmission oil level, and fill to the 17 L (4.5 US gal.) capacity on page 213 when changing it.
Manual Section: Forklift Truck Movement Troubleshooting p. 151Mast and attachments stop moving or work erratically partway through a lift cycle
Lower the load and follow the 'If the Mast and Attachments Stop Moving' steps on page 152 (FC models: malfunction steps on page 153). Check hydraulic oil level and condition: the oil is replaced every 2000 service hours or 12 months (page 145), and the return oil filter is replaced one month or 200 service hours after delivery (page 160), then checked and replaced every 1000 service hours (page 162).
Manual Section: Mast and Attachment Troubleshooting p. 152D-series or F-series diagnostic code appearing on the operator display after engine startup
Record the exact code shown, then look it up in the diagnostic code table on page 155 to read its explanation and the action listed for it. Stop operating the truck if the explanation calls for it, and give the code to your service technician so they start from the right fault.
Manual Section: Diagnostic Codes and Explanations p. 155Frequently Asked Questions
How do I reset the engine oil replacement time on my forklift?
To reset the engine oil replacement time, turn the key switch to the ON position. Fully depress the accelerator pedal for 15 seconds, release it for 15 seconds, and repeat this cycle twice. Finally, press the pedal lightly for 3 seconds; the engine oil warning icon will blink three times to confirm the reset. p. 195
What are the engine oil and oil filter replacement specifications for the Mitsubishi FD40N1–FD55N1 Series forklift?
The engine oil capacity is 12.0 L (3.2 US gal) total, with the crankcase holding 11.0 L (2.91 US gal) and the oil filter holding 1.0 L (0.3 US gal). The oil and filter should be replaced every 500 service hours or 3 months, whichever comes first. p. 161
What is the tightening torque for the front tire wheel nuts on a Mitsubishi FD40N1 to FD55N1 Series forklift?
The tightening torque for the front wheel nuts is 600 ± 60 N·m (61.18 ± 6.12 kgf·m) [442.80 ± 44.28 lbf·ft]. p. 189
What is the lift chain elongation limit for 4 to 4.5 ton models?
The lift chain elongation limit for 4 to 4.5 ton models is 518 mm (20.4 in.) per 20 links. p. 182
What do I get after purchasing this Mitsubishi FD40N1 manual?
A 221-page Operator Manual in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Is this manual print-friendly?
Yes. Many buyers print one chapter at a time for their own shop and keep the rest on a tablet.
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