JD 550B, 555B Crawler Bulldozer Loader Technical Manual
Technical Repair Manual (TM1331) – Service Reference Guide
| Section | Component / System | High-Value Technical Data (Mechanic’s Focus) |
|---|---|---|
| 01 | Tracks | Wear limits for links/bushings, hydraulic tensioner adjustment, and track bolt torque specs. |
| 02 | Axles & Suspension | Bearing preload settings, oscillation pin clearances, and equalizer bar inspection points. |
| 03 | Transmission | Clutch pack pressure tests, control valve shift points, and transmission oil flow diagrams. |
| 04 | Engine | Valve lash clearances, cylinder compression specs, and main bearing torque sequences. |
| 05 | Engine Auxiliaries | Turbocharger boost pressures, fan belt tensioning, and fuel injection timing. |
| 07 | Clutch | Free-play adjustments, disc wear tolerances, and linkage synchronization. |
| 09 | Steering Systems | Steering clutch/brake pressures and hydraulic steering orbital valve troubleshooting. |
| 15 | Equipment Attaching | Pin and bushing tolerance limits and high-stress area weld inspection protocols. |
| 17 | Frame & Chassis | Mainframe alignment specs and engine-to-chassis mounting bolt torque. |
| 18 | Operator’s Station | Control lever calibration, seat safety switch testing, and gauge cluster wiring. |
| 19 | Sheet Metal | Fastener locations for rapid component access and belly guard removal safety. |
| 30/40 | Winch & Drive | Brake band adjustment, line pull capacity, and input shaft seal replacement. |
| 31/32 | 555B / 550B Specifics | Loader bucket cycle times, dozer blade angle adjustments, and C-frame pivot wear. |
| 33A/B | Backhoe (9300/9550) | Relief valve settings (PSI), swing motor troubleshooting, and stabilizer drift tests. |
| 37 | Log Arch | Roller bearing lubrication intervals and structural load-bearing inspections. |
| 42 | Ground Cond. Tools | Ripper shank replacement procedures and hydraulic depth control settings. |
| 99 | Dealer Tools | Blueprints for fabricated pullers, seal drivers, and specialized alignment jigs. |
