Covers all three Articulated Loader variants in one OEM #918274 volume, with engine removal split out for the AL100, AL200, and AL300 series plus front and rear axle service and full hydrostatic drive diagnostics. The 25 pages of electrical schematics include machine controller logic and per-series wiring, and the hydraulic schematics run from work hydraulics through the hydrostatic drive and steering circuits. Diagnostics lean on 42 pages of flow charts and 18 pages of troubleshooting tables, backed by 100 pages of service procedures and 2 pages of maintenance schedules with service brake adjustments and lubrication intervals. Torque wheel fasteners to 165 N·m (122 lbf-ft), change engine oil and filter every 250 hours, and renew hydraulic fluid and return filters at 500 hours. Bookmarked and keyword-searchable for the tablet you carry to the machine.
What's Inside This Gehl AL140, AL240, AL340 Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | - | Safety Symbol, Signal Words, Contents and Use of This Manual, Machine Orientation, Service Parts |
| Safety | - | 2-Post ROPS/FOPS Warning, Mandatory Safety Shutdown Procedure, Before Starting, During Operation, Electrical Energy, Fire Hazards, Crystalline Silica Exposure, Safety Decals |
| Maintenance | - | Maintenance Schedule, Check, Clean and Inspect, Leakage Check, Lubrication and Filter Changes, Functional Check, Engine Maintenance, Fuel System |
| Operation | - | Operation Safety, Controls and Switches, Instrument Panel and Indicators, Cab Controls, Warning Indicators, Operator’s Seat and Ignition Switch, Steering Column, Hand Throttle |
| Chassis | - | Tilting the Platform, Lowering the Platform, Repairing or Replacing Platform Switch, Hood Removal, Hood Installation, Center/Steering Bearing Removal |
| Engine | - | Engine Removal, Engine Removal Preparation, AL100 Series Engine Removal, AL200 Series Engine Removal, AL300 Series Engine Removal, Engine Installation, Drive Coupling Removal |
| Cooling System | - | Radiator/Oil Cooler Removal, AL100 Series Radiator/Oil Cooler Removal, AL200 and 300 Series Radiator/Oil Cooler Removal, Radiator/Oil Cooler Installation |
| Axles | - | Service Brake Adjustment, Al 100/200 Series Service Brake Adjustment, Al 300 Series Service Brake Adjustment, Front Axle Removal, Front Axle Installation, Rear Axle Removal |
| Hydraulics | - | Work Hydraulics Troubleshooting, Hydrostatic Drive System, Hydraulics Troubleshooting Diagnostic Flow Charts, Lift and Tilt Hydraulics Diagnostics, Steering Hydraulics Diagnostics |
| Electrical System | - | Battery Removal, Battery Installation, Machine Controller, Machine Controller LED/Indicator Assignments, Machine Controller Logic, AL100 Series Complete Electrical Schematic |
| Troubleshooting | - | Indicator Lamps / Seals and Hoses, Hydraulic System, Hydrostatic Drive System, Electrical |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| AL100 Series | ||
| Wheel Fastener Torque | 165 N•m (122 lbf-ft) | p. 28 |
| Diesel Engine Oil Capacity | 4.4 L (4.6 qts.) | p. 20 |
| All Models | ||
| Hydraulic fluid and return filter replacement interval | 500 Hours (or annually) | p. 34 |
| Fuel filter replacement interval | 500 Hours (or annually) | p. 34 |
| Engine oil/filter replacement interval (after first 50 hours) | 250 Hours (or every six months) | p. 34 |
| Hydraulic fitting torque (example for M10X1.0, light application) | 13 lb.-ft. (18 N•m) | p. 356 |
| Pivot mounting bolt torque (center hinge) | 302 lb.-ft. (410 N•m) | p. 83 |
| Troubleshooting guide for slow/weak/intermittent hydraulic functions | Refer to troubleshooting tables for possible causes and corrective actions | p. 183 |
| AL100 Series (and similar for other models) | ||
| Drive coupler assembly bolts torque | 33 lb.-ft. (45 N•m) | p. 136 |
| AL200 Series | ||
| Diesel Engine Oil Capacity | 6.7 L (7.2 qts.) | p. 20 |
| AL300 Series | ||
| Diesel Engine Oil Capacity | 7.4 L (7.8 qts.) | p. 20 |
| Axle Oil (Hubs each) Capacity | 0.4 L (0.4 qt.) | p. 20 |
Gehl AL140, AL240, AL340 Common Problems This Manual Covers
Gehl AL140 hydraulic functions slow, weak, or intermittent after extended service hours
Check the hydraulic oil level and look for contamination or foaming. A clogged filter is the usual cause of sluggish circuits, so replace the fluid and return filter at 500 hours or annually. Then work the diagnostic flow chart on page 183 to isolate the fault to pressure, flow, pump output, or a single work circuit.
Manual Section: Hydraulic System TroubleshootingLoader will not drive or loses drive under load in either direction
Verify the parking brake is fully released and the operator platform switch is depressed before you chase electrical or hydraulic faults. With oil level confirmed, open the Hydrostatic Drive System section of the troubleshooting procedures. If drive is noisy or sluggish, swap the hydraulic filters at the 500-hour interval before testing pump pressure in both directions.
Manual Section: Hydrostatic Drive System TroubleshootingSteering response is delayed or requires noticeably more effort in both directions
Inspect the articulation joint pins and bushings for wear or binding, since these rank among the top wear items on this machine. With the fluid level confirmed, trace the steering circuit on the schematic. If the center hinge pivot was recently serviced, torque its mounting bolts to 302 lb.-ft. (410 N•m) per page 83 before you suspect the steering valve.
Manual Section: HydraulicsEngine starts but machine is hard to move or operates poorly after startup
Confirm hydraulic and engine oil levels before every shift, since running either low costs you performance right away. Make sure the parking brake is fully released and no indicator lamps stay lit. The Maintenance Schedule puts engine oil and filter changes at every 250 hours and hydraulic filters at 500 hours.
Manual Section: MaintenanceLift arm does not raise fully or fails to hold position under load p. 183
Start with the hydraulic fluid level, the fastest cause of weak lift when it runs low. Examine the filter condition and replace it at the 500-hour service interval. If the arm raises slowly under load, follow the flow chart on page 183 to test system pressure and isolate the fault to the pump, relief valve, or lift cylinder circuit.
Manual Section: Work Hydraulics Troubleshooting Diagnostic Flow ChartsFrequently Asked Questions
What are the torque specs for the wheel bolts on a Gehl AL340?
Wheel fastener torque on the Gehl AL340 Series is 319 N•m (235 lbf-ft). Check the fasteners before initial operation, again after the first two hours, and daily until the torque stabilizes. For the full procedure, see the "Wheels and Tires" section on page 39.
Where can I find the service troubleshooting procedure for a Gehl AL340?
Chapter 12, "Troubleshooting," holds the service procedures for the Gehl AL340, starting on page 333. It breaks down into Engine, Indicator Lamps / Seals and Hoses, Hydraulic System, Hydrostatic Drive System, and Electrical troubleshooting. For deeper diagnostics, the hydraulics flow charts begin on page 178.
What are the replacement specifications for hydraulic filters?
Per the manual, the hydraulic fluid and return filter get changed every 500 hours or annually. It does not, however, list specific replacement specs for the filter, such as a part number or micron rating.
What are the replacement specifications for fuel filters?
The manual calls for changing the fuel filter and cleaning the pre-filter every 500 hours or annually. It stops short of specific replacement specs for the fuel filter, such as a part number or micron rating.
Is this Gehl AL140, AL240, AL340 Service Manual a digital download?
Instant PDF download. The full 360-page searchable Service Manual lands in your hands the moment payment clears. Open it on a laptop, tablet, or phone right in the shop.
Am I able to print pages from this Gehl AL140, AL240, AL340 manual?
Yes. The PDF carries no DRM, so print any page or section your shop needs. It works with any standard printer.
Are hydraulic system diagrams in this Gehl AL140, AL240, AL340 Service Manual?
Yes. It includes hydraulic system diagrams, circuit schematics, and component specifications.
Document Quality
This service manual is a mixed digital and scanned document. You can search and copy the main body text and content within tables, which is crisp and easy to read. However, all diagrams, illustrations, and electrical schematics are raster images, meaning text within them is not searchable or copyable. While labels on photos and simpler diagrams are generally readable, text on the complex electrical schematics is very small and can be difficult to decipher even when zoomed in. The pages are clean with no scan artifacts, but there are several blank "NOTES" pages and two completely blank pages at the end.
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