When a figure on the Utilev UT80-100P internal combustion counterbalanced forklift truck is in doubt, this 98-page factory book (OEM ID 76501365) settles it for the UT80-100P DSL trucks. Hydraulic schematics in this Utilev UT80-100P service manual PDF trace oil from the pump through the control valve and flow regulator to the lift and tilt cylinders, while the circuit diagram maps the key switch, instrument cluster and control module wiring. Troubleshooting charts cover the hydraulic transmission, drive axle, brakes and mast, with procedures for mast removal and adjustment, spiral bevel gear meshing and bleeding the brake lines. Change engine oil and filter every 250 hours or 3 months, and hold transmission main oil pressure at 1.2 to 1.5 MPa. A made-up pressure figure burns clutch packs. Your bookmarked, text-searchable PDF keeps the factory number in front of you until the truck is back on shift, lifting loads.
What's Inside This Utilev UT80-100P DSL Manual
| System | Pages | Key Topics |
|---|---|---|
| Power System | 5-11 | Engine, Intake System, Exhaust System, Cooling System |
| Universal Joint | 12 | Flange Yokes, Cross Shaft, Bearing, Centring Yoke, Needle Bearings |
| Hydraulic Transmission Gearbox | 13-22 | Overview, Main Technical Parameters, Principles of Operation, Structural Overview, Troubleshooting |
| Drive Axle Assembly | 23-34 | Drive Shaft Basic Structure and Working Principles, Periodic Technical Services, Lubricating the Drive Shaft, Lifting the Drive Axle |
| Steering System | 35-39 | Hydraulic Steering Mechanism, Steering Axle |
| Brake System | 40-51 | Specifications, Troubleshooting, Pedal Height and Free Travel, Master Cylinder and Accumulator, Parking Brake, Service Brake, Troubleshooting Hydraulic Brake Issues |
| Hydraulic System | 52-61 | Oil Pump, Control Valve, Rotating Pipe Filter, Flow Regulator Valve, Lift Cylinder, Tilt Cylinder, Bleeding Air From the Hydraulic System |
| Lifting System | 62-69 | Assembly and Commissioning Data, Fault Diagnosis and Troubleshooting, Overview, Mast Removal, Fitting and Adjustment, Removal and Fitting of Lift Cylinders |
| Removal and Fitting of the Overhead Guard | 70-71 | Right Trim, Left Trim, Handle, Cover Plate, Air Vent, Cross Brace Assembly |
| Electrical System | 72-98 | Control Module |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Engine oil capacity | 8-12 L | p. 6 |
| Lubricant and oil filter replacement cycle | 250 hours, 3 months, or 10,000 kilometres | p. 7 |
| Fuel filter replacement cycle | 250 hours or 10,000 kms | p. 7 |
| Air filter cleaning pressure | 500 kPA | p. 9 |
| Main oil pressure | 1.2-1.5 MPa | p. 14 |
| Main Oil Pressure (Gearbox) | 1.2-1.5 MPa | p. 14 |
| Torque converter inlet pressure | 0.5-0.7 MPa | p. 14 |
| Cooling fluid capacity | 8.5 L | p. 6 |
| Maximum operating pressure | 0.7 MPa | p. 57 |
| Bypass valve activation pressure | 0.25 MPa | p. 57 |
| Engine Displacement | 4.5L | p. 6 |
| Rated Power | 82 kW | p. 6 |
Utilev UT80-100P DSL Common Problems This Manual Covers
Utilev UT80-100P fork carriage drops noticeably with the lift lever in neutral position
Measure wear clearance between the control valve body and stem, replace the stem if out of spec, and confirm it centres in neutral. Replace or flush the overload valve if worn or stuck with dirt. If the valve is good, overhaul the lift cylinder seals per page 56. Before disconnecting cylinder lines, turn off the engine, fully lower the cylinder and keep your body clear (page 68).
Manual Section: Hydraulic System Fault Diagnosis p. 56Hydraulic steering goes heavy at high engine revs and feels light at low revs
Check the oil pump is delivering properly, since this pattern points to insufficient pump supply on page 36. Verify tank oil is at the specified level and the grade is correct. If the oil foams, expel air and check suction lines for leaks. Do not force the steering wheel or dismantle the steering mechanism (page 36). Adjust a stuck priority valve spool and flush a blocked signal port per page 56.
Manual Section: Steering System Troubleshooting p. 36Forks lifting weak or the truck cannot lift the load at all
Verify the load weight is within regulations, then check hydraulic lines for leaks by compressing coupling nuts and inspecting sealing gaskets. Change diluted or non-compliant hydraulic oil and find why it runs hot. Next test the lift cylinder piston Y-ring, valve springs and oil pump gear wear per page 64. Before removing the cylinder, turn off the engine, fully lower it and keep clear; never reuse removed O-rings or Y-rings (page 68).
Manual Section: Lifting System Fault Diagnosis p. 64Service brakes dragging after release with no free play felt at the brake pedal
Measure brake pedal free travel and adjust it to 5-7.5 mm per page 40. If drag remains, check for a faulty wheel cylinder piston, broken piston cup, weak return spring or clogged master cylinder return port, and flush clogged lines per page 41. Before opening any hydraulic line, turn off the engine and pump the brake pedal 5-10 times to release accumulator energy (page 44).
Manual Section: Brake System Troubleshooting p. 41Charge indicator light stays on and the alternator cannot charge the battery
Turn off the ignition, disconnect the emergency stop switch and remove rings and jewelry before touching wiring (page 72). Check the fuse first; find the cause before fitting a new one and never use a higher rating. Then inspect the reed wire for breaks or poor contact, test field wiring and diodes, and replace the regulator if damaged, following page 81.
Manual Section: Starter and Alternator Troubleshooting p. 81Forks lift unevenly and lifting rollers do not rotate on the mast
Adjust the lifting chains to the same tension per page 64. Inspect the lifting rollers: if grease has hardened or dirt has clogged them, clean and lubricate the rollers, and adjust any that are incorrectly set. While you are there, smear the guide rail contact surfaces with grease and clear any foreign bodies jammed between moving parts.
Manual Section: Lifting System Fault Diagnosis p. 64Frequently Asked Questions
How do I retrieve error codes on a UTILEV UT80-100P?
To view fault codes, turn the fault check switch on the internal casing to 'OFF' and the diagnostic switch to 'ON'. Turn the ignition key to 'ON'. The 'Severe Warning' and 'Engine Failure' indicators will flash the fault code number. Use the right Engine Diagnostic switch to flip between codes. p. 82
What are the replacement specifications for the diesel fuel filters on the Utilev UT80-100P DSL?
Cummins recommends using high-quality diesel with appropriate viscosity and Fleetguard filters. Replace fuel filters every 250 hours or 10,000 kilometers, whichever is reached first. p. 7
What are the replacement specifications for engine oil and the oil filter on the Utilev UT80-100P DSL?
Use high-quality lubricating oil appropriate for the local climate and Fleetguard oil filters. The longest replacement cycle for lubricant and oil filters is 250 hours, 3 months, or 10,000 kilometers, whichever is reached first. p. 7
What is the tightening torque for the overhead guard support bolts on the Utilev UT80-100P DSL?
The 8 bolts for the 4 overhead guard supports must be tightened to a torque between 137 Nm and 167 Nm. p. 71
What is the required brake pedal clearance on the Utilev UT80-100P DSL forklift?
The brake pedal free travel should be 5-7.5 mm. The pedal height should be 145 mm ± 5 mm from the floor plate. p. 40
What do I get after purchasing this Utilev UT80-100P manual?
A single searchable PDF file of 98 pages, downloadable right after payment. Nothing ships, nothing waits in the mail.
Am I free to print this Utilev UT80-100P Service Manual?
Yes. Many buyers print one chapter at a time for their own shop and keep the rest on a tablet.
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