All 107 pages of this Bolens Large Frame service manual PDF (OEM #552665-5) focus on one thing: putting your Large Frame tractor back to work in the yard. Inside: wiring diagrams for every model in the series, from the 1886s light and charging circuits to the 2388s preheat circuit, plus full hydrostatic teardown procedures for both Sundstrand and Eaton transmissions. You also get troubleshooting guides for the electrical, drive train, fuel, and hydraulic systems, torque and lubrication charts, and service coverage for mower, snow thrower, and tiller attachments. Battery should read 11.5 to 12.5 volts; each 0.012-inch shim raises relief pressure 50 psi. These tractors outlived their dealers, and the factory numbers live here. Bookmarked and keyword-searchable; download it, prop your phone on the fender, and get wrenching.
What's Inside This Bolens Large Frame Series Manual
| System | Pages | Key Topics |
|---|
| General Information | 1-12 | Serial Number Information, Specifications, Torque Maintenance Chart, Kohler Maintenance Chart, Wisconsin/Ducatti Maintenance Chart, Lubrication Points, Lubrication Chart |
| Electrical System | 13-32 | Trouble Shooting Guide (Wiring Diagram 1886s-05 and 06, Light Circuit Diagram, Start/Run Circuit, Charging Circuit, Wiring Diagram 2086 and 2087 S/N 01/03, Wiring Diagram 2087-04 and 2389, Light Circuit, Start/Run Circuit 2086 and 2087-01/03, Start/Run Circuit 2389, 2087-04 and 2389s, Cruise Control Circuit, Wiring Diagram 2389s, Wiring Diagram 2288 and 2289, Seat Circuit, Start Circuit, Wiring Diagram 2388s, Run Circuit, Preheat Circuit, Testing Electrical System) |
| Drive Train | 33-69 | Trouble Shooting Guide, Principles of Hydrostatic Operation, Hydrostatic Transmission Flow Chart, Identification, Testing Hydro, Hydro Removal and Installation |
| Fuel System | 70-74 | Trouble Shooting Guide, Fuel Tank and Valve, Fuel Filter, Air Cleaner, Carburetor Adjustments |
| Chassis | 75-81 | Front Axle, Front Wheel Alignment, Turning Radius, Front Wheel Bearings, Tires, Brakes, Power Take-Off Lever and Belts, Rear Wheels |
| Hydraulic System | 82-94 | Trouble Shooting Guide, Principle of Operation, Testing Hydraulic System, Checking Implement Relief Valve, Hydraulic Power Lift, Repairing Hydraulic System (Disassembly, Assembly) |
| Engine | 95-100 | Trouble Shooting Guide, Engine Removal |
| Tractor Attachments | 101-107 | Mowers, Snow Thrower, Tillers |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| 2388s |
| Battery | 90 Amp | p. 6 |
| All Models |
| Battery voltage | 11.5 to 12.5 volts | p. 31 |
| Battery cranking test voltage | 9.0 volts | p. 31 |
| Pressure increase per 0.012 in shim | 50 psi | p. 36 |
| Seat interlock switch activation clearance | 5/8 in. (1.6 cm) | p. 81 |
| Pressure increase per 0.012 in. shim | 50 psi | p. 84 |
| 1886s, 2086, 2087, 2389, 2389s |
| Dry type element replacement interval (dirty conditions) | 100 hours | p. 73 |
| Dry type element replacement interval (good clean air conditions) | 200 hours | p. 73 |
| 1886s-05 & 06 |
| Engine Oil Capacity (1886s-05 & 06) | 3 Quarts and 1 pint in filter | p. 5 |
| 2086 |
| Engine Oil Capacity (2086) | 3 Quarts and 1 pint in filter | p. 5 |
| 2087 |
| Engine Oil Capacity (2087) | 3 Quarts and 1 pint in filter | p. 5 |
| 2288 |
| Engine Oil Capacity (2288) | 2.2 Quarts and 1 pint in filter | p. 5 |
