All 100 pages of this Bolens Medium Tube Frame Service and Repair Manual (OEM #552875-1) focus on one thing: getting your Medium Tube Frame tractor back to factory condition. You get a full run of wiring diagrams covering magneto, battery, and solid state ignition for every model on that list, plus troubleshooting guides for the electrical system, drive train, fuel system, chassis, and hydraulic lift. Inside: 3-speed and 6-speed transmission assembly, Model 10 hydrostatic repair, clutch and brake adjustments, and carburetor tuning. Load-test the battery down to 9.0 volts, confirm 11.5 to 12.5 volts, and clean the fuel filter every 100 hours per the maintenance chart. No more chasing ignition faults with a multimeter and a prayer. Download now, pull it up on your phone in the garage, and get that tractor running again this season.
What's Inside This Bolens Medium Tube Frame Series Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 3-13 | Serial Number Information, Specifications, Maintenance Chart, Lubrication Points, Lubrication Chart Gear Drive, Lubrication Chart Hydrostatic Drive |
| Electrical System | 14-37 | Trouble Shooting Guide, Model-Specific Wiring Diagrams (Magneto, Battery and Solid State Ignition), Delco-Remy Generators, Testing Electrical System |
| Drive Train | 38-68 | Trouble Shooting Guide (Bearing Installation Tools, Oil Seal Tools, Worm Centering Kit No. 171-9432, Transmission Assembly 3-Speed, Transmission Assembly 6-Speed, Transmission Assembly 3-Speed Gear Diagram, Transmission Assembly 6-Speed Gear Diagram, Removal and Installation of Hydrostatic Package, Model 10 Hydrostatic Repair, Transaxle Assembly) |
| Fuel System | 69-74 | Trouble Shooting Guide (Fuel Tank and Valve, Fuel Filter, Air Cleaner, Carburetor Adjustments) |
| Chassis | 75-90 | Steering Assembly (Clutch Assembly 6-Speed Transmission, Clutch Assembly 3-Speed Transmission, Clutch Assembly 3-Speed Transmission Older Models, Belt Guide Adjustments, Travel Pedal Adjustment Hydro Models, Hydrostatic Neutral Adjustment, Brake Assembly, Parking Brake, Disc Brake, Brake Interlock Switch, P.T.O. Interlock Switch, Drive Belts, P.T.O. Belts, Starter-Generator Drive, P.T.O. Shaft and Seal) |
| Hydraulic System | 91-96 | Trouble Shooting Guide (Principle of Operation, Hydraulic Power Lift, Hydraulic Lift Kit, Transmission Filters) |
| Engine | 97-99 | Trouble Shooting Guide, Engine Removal |
| Service Letters/Bulletins | 100 | - |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Fuel Filter Maintenance | 100 Hrs. Clean | p. 9 |
| Battery voltage | 11.5 to 12.5 volts | p. 37 |
| Battery voltage (load test limit) | 9.0 volts | p. 37 |
| Engine Oil Capacity (Briggs & Stratton) | 2-3/4 pints | p. 4 |
| Gasoline Capacity (Briggs & Stratton) | 4 quarts | p. 4 |
| Engine Oil Capacity (Wisconsin) | 1 quart | p. 6 |
| Hydrostatic Transaxle Bolt Torque | 240 inch pounds | p. 64 |
| Hydrostatic Auxiliary Pump Capscrew Torque | 15-18 ft. lbs. | p. 66 |
| HH-100, HH-120-120090 C, HH-120-12099E, HH-140, HH-150 & HH-160 | ||
| Engine Oil Capacity (Tecumseh) | 3 pints | p. 5 |
| HH-120 - 120061 B | ||
| Engine Oil Capacity (Tecumseh) | 2 pints | p. 5 |
Bolens Medium Tube Frame Series Common Problems This Manual Covers
Transmission feels locked up and tractor won't roll forward or backward with engine running
Verify the parking brake is fully released and the linkage returns freely before condemning the transmission. Work through the drive train troubleshooting chart on page 38 to separate brake, belt, and internal gear problems. On hydrostatic models, if you pull the transaxle, torque the case bolts to 240 inch pounds on reassembly.
Manual Section: Drive Train p. 38Hydraulic lift won't raise the mower deck, or attachment drops slowly in neutral
Check transmission oil level first; a low reservoir kills charge pressure before anything else fails. Inspect the pickup tube and transmission filter for plugging, then follow the troubleshooting chart on page 91 to test the implement relief valve and spring. If you remove the auxiliary pump, torque its five capscrews to 15-18 ft. lbs. per page 66.
Manual Section: Hydraulic System p. 91Engine starts hard, surges at idle, or lugs down and dies under mowing load
Verify the fuel shutoff valve is open, then check for steady flow at the carburetor inlet. Clean the fuel filter; the maintenance chart on page 9 calls for cleaning every 100 hours, and old tanks shed rust well before that. Follow the fuel system chart on page 69 for carburetor adjustment and rough running.
Manual Section: Fuel System p. 69Engine runs hot and loses power after twenty minutes, transmission case too hot to touch
Check engine oil level and top up; Briggs & Stratton engines hold 2-3/4 pints per the specifications on page 4. Clean grass clippings and chaff off the cooling fins, fan, and transmission case, and confirm the fan turns freely. Then run the operating-hot diagnosis in the drive train chart on page 38.
Manual Section: Drive Train p. 38Frequently Asked Questions
What are the replacement specifications for the battery?
The manual specifies that for the battery, you should check the water level daily and add water as necessary. For testing capacity, the battery should be at approximately 80°F, and the voltage should be between 11.5 and 12.5 volts. If the voltage drops below 9.0 volts after cranking the engine for 15 seconds, the battery may need to be replaced. p. 37
What is the oil capacity for the engine crankcase on gear drive models?
The engine crankcase oil capacity for gear drive models requires adding oil to the full mark. Depending on the temperature, you should use SAE 30 oil for spring, summer, and autumn (+120°F to 40°F), or SAE 10W-30/5W-20 for winter conditions, with a service interval of 50 hours. p. 11
What is the torque specification for the hydrostatic package bolts?
When installing the hydrostatic package to the transaxle, you must use a new gasket and torque the four 12-point bolts to 240 inch pounds. p. 64
How do you fix bolens 1000 tube frame tractor won't crank, starter clicks or does nothing with key on?
Check battery voltage at the posts; a healthy battery reads 11.5 to 12.5 volts per page 37 and should stay above 9.0 volts under cranking load. Clean and tighten corroded cable connections, then work through the electric start troubleshooting chart on page 14 to test the starter, key switch, and interlocks. p. 14
How quickly can I access this Bolens 600 manual after buying?
Straight to your device: 100 pages of searchable Service and Repair Manual, downloadable the moment payment goes through.
Can I print just the pages I need from this Bolens 600 manual?
Yes, printing is unrestricted: a single page, a chapter, or the lot, on letter or A4.
Does this Bolens 600 manual show the machine's wiring?
Included. The Bolens Medium Tube Frame Service and Repair Manual covers complete wiring harness diagrams, electrical circuits, and connector pinouts. There is one on page 15, for example.











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