The document is a technical/repair manual for the Jacobsen Eclipse® 2 Floating Head Mowers, models 118F and 122F. It provides detailed information and procedures for safe repair and maintenance of these greens mowers and their associated accessory attachments.
Function Description
The Jacobsen Eclipse® 2 is a greens mower designed for precision turf maintenance. It comes in two main power configurations: Gen-Set models (powered by an internal combustion engine and generator) and Battery Pack models (powered by a series of 12-volt sealed lead-acid batteries). Both configurations utilize an InCommand™ control system, Operator Presence Control (OPC), brakes, and a kickstand. The mowers feature floating heads, with options for 18-inch or 22-inch reels and either 11-blade or 15-blade configurations, to achieve precise cutting on golf greens. The InCommand™ control system manages all machine functions based on user input and programmed settings, including reel and traction controllers, and provides diagnostic information via an LCD display.
Important Technical Specifications
Engine (Honda/GX120 - for Gen-Set models):
- Engine Type: 4-Stroke, Overhead Valve, Single Cylinder
- Displacement: 7.3 cu in. (118 cc)
- Bore x Stroke: 2.4 x 1.7 in. (60 x 42 mm)
- Cooling System: Forced Air
- Ignition System: Transistorized Magneto
- PTO Shaft Rotation: Counterclockwise
- Recommended Spark Plug: BPR6ES (NGK) / W20EPR-U (ND)
- Spark Plug Gap: 0.028–0.031 in. (0.7–0.8 mm)
- Engine Mounting Carriage Bolt Torque: 13 lb-ft (17.7 N·m)
Electrical Power:
- Removable Battery Pack (Battery Pack models): Four 12-Volt, Sealed Lead Acid Batteries, wired in series, with Battery Gauge and Protective Box.
- Gen-Set (Gen-Set models): Nominal 48 VDC
- Motors: 48-Volt, Brushless, Keyed Shaft
- Motor Power Rating: 1.3 hp (1.0 kW)
- Motor Operating Speed: 0–2200 rpm
- Motor Rotation: Bi-Directional
- Battery Pack Fuse Nut Torque: 25 lb-in. (2.82 N·m)
- Generator Engine Shaft Screw Torque: 20.4 lb-ft (27.7 N·m)
- Generator Mounting Screw Torque: 68 lb-in. (7.7 N·m)
- Generator Adapter Plate Mounting Screw Torque: 14.4 lb-ft (9.5 N·m)
- Generator Cover Mounting Screw Torque: 68 lb-in. (7.7 N·m)
- Ceramic Resistor Resistance at 68°F: 5 ± 5% ohms
- 120 Ohm Resistor Connector Resistance at 68°F: 120 ± 10% ohms
- Throttle Potentiometer Low End Resistance at 68°F: 18.9–35.1 ohms
- Throttle Potentiometer High End Resistance at 68°F: 3710–6890 ohms
- Bail Potentiometer Resistance at 68°F: 3640–6760 ohms
Traction and Reel Motor System:
- Reel Motor: Independent Motor
- Traction Motor: Belt Driven via Independent Motor
- Traction Reduction Ratio: 15.15:1
- Differential: Full Automotive Type, Housed in Traction Drum
- Rear Drive Drum Composition: Machined Aluminum Alloy
- Mow Speed: 0–3.8 mph (0–6.1 km/h)
- Transport Wheels (Optional): (2) Bi-Directional, Pneumatic, 11 x 4 Goodyear Softrac
Brakes:
- Park Brake Lever Actuating Force: 10 lb (4.5 kg)
- Park Brake Band—Anchor Pin Center-to-Center Distance (Park Brake Released): 1.50 in. (38 mm)
Cutting Unit:
- Height-of-Cut Range (Bench Setting): 1/16–7/16 in. (1.6–11.1 mm)
- Reel Diameter: 5 in. (127 mm)
- Reel Composition: Hardened High-Manganese Carbon Steel
- Width of Cut: 18 in. (457 mm), 22 in. (557.5 mm)
- Bedknife-to-Reel Gap: 0.001–0.003 in. (0.025–0.075 mm)
- Reel Bearing Pre-Load: 0.040 in. (1.0 mm)
- Bedknife Front Face Height (minimum): 0.035 in. (0.9 mm)
- Bedknife Front Face Angle (all bedknives): 5 degrees
- Bedknife Top Face Angle (rear relief) (all bedknives except Super Tournament): 8–10 degrees
- Super Tournament Bedknife Top Face Angle (rear relief): 5–7 degrees
- Reel Blade Relief Angle: 45 degrees
Mower Weights (Without Grass Catcher):
- Model 6336 (With Steel Groove Roller 68618): 254 lb (115.22 kg)
- Model 6337 (With Steel Groove Roller 68618): 257 lb (116.6 kg)
- Model 6340 (With Machined Aluminum Grooved Roller 68614): 265 lb (120.2 kg)
- Model 6341 (With Machined Aluminum Grooved Roller 68614): 268 lb (121.6 kg)
- Model 6345 (With Steel Groove Roller 68618): 274 lb (124.3 kg)
- Model 6346 (With Steel Groove Roller 68618): 277 lb (125.6 kg)
- Model 6349 (With Machined Aluminum Grooved Roller 68614): 285 lb (129.3 kg)
- Model 6350 (With Machined Aluminum Grooved Roller 68614): 288 lb (130.6 kg)
Usage Features
- Operator Presence Control (OPC): A safety system that stops the reel and drive mechanism when the operator releases the OPC bail.
- Key Switch: A three-position switch (off, run, and start) for operating the main control unit.
- Mow Switch: Engages/disengages the reel motor.
- Speed Control Paddle: Adjusts the traction drive speed.
- LCD Display and Controls: Provides system voltage, travel speed, FOC setting, reel speed, and total hours. It also displays alerts for low voltage, overvoltage, and motor faults.
- Maintenance Mode: Accessible via a PIN, allowing adjustment of maintenance hours, backlap settings, system voltage, travel speed, FOC, reel speed, traction/reel motor current draw, mow speed, reel speed, power source, number of reel blades, speed paddle calibration, bail lever calibration, display units, and factory reset.
- Backlapping Procedure: Allows for sharpening the reel and bedknife.
- Handle Height Adjustment: Customizable for operator comfort.
Maintenance Features
- Detailed Repair Procedures: The manual outlines steps for removal, disassembly, assembly, and installation of various components, including the engine, electrical components (battery pack, generator, motors, switches, controllers), power train (belts, drum, differential), brakes, handle and controls, cutting unit (reel, bedknife, rollers, grass shield), and accessories (light kit, turf groomer, push brush, transport wheels).
- Troubleshooting Charts: Provided for common issues such as engine not starting, engine running erratically, traction motor not engaging, reel motor not engaging, and various quality-of-cut symptoms (washboarding, marcelling, step cutting, stragglers, streaks, windrowing, rifling or tramlining).
- Component Testing: Includes procedures for testing electrical components like the battery pack, generator output, switches, fuses, resistors, and potentiometers using a digital multimeter.
- Specifications: Comprehensive lists of general, check and adjustment, and repair specifications, including torque values for inch and metric fasteners, and lubricant specifications.
- Safety Notices: Emphasizes safety precautions for all procedures, including wearing proper PPE, working in well-ventilated areas, handling fuel and chemicals safely, and securely supporting the machine.
- Lubricant Specifications: Recommends NLGI Grade 2 LB grease for fittings and provides guidance on synthetic lubricants, storage, and avoiding mixing different types of lubricants.
- Special Tools and Materials: Lists required tools and materials (e.g., dielectric grease, Loctite® thread sealant, bearing assembly tool) for specific procedures.
- Wiring Diagrams: Electrical schematics are provided for troubleshooting and understanding the electrical system.
- Waste Material Disposal: Guidelines for safe disposal of waste fluids and old batteries.
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