John Deere 750B/850B Crawler Bulldozer Repair Manual — 1993 (P/N TM1476)

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John Deere Models Covered & Key Technical Specifications

Models: 750B, 850B

Sub-models / Variants: 750B Standard, 750B Long Track (LT), 750B Low Ground Pressure (LGP), 750B Narrow Gauge, 750B Wide Track, 850B Standard, 850B Long Track (LT), 850B Low Ground Pressure (LGP)

Model Years: 1993–1994

Serial Breaks (by procedure):

  • 750B and 850B: Final drive housing plug, through S/N 729291 and from S/N 729292. Steering and transmission controls, charge pump service, and electrical component identification, through S/N 731273 and from S/N 731274.

  • 750B charge pump: S/N 731274–757029 and from S/N 757030. 850B charge pump: through S/N 757351 and from S/N 757352, within the S/N 731274-and-up procedure.

  • 750B radiator expansion tank mounting: through S/N 777569 and from S/N 777570. 850B LGP front crossbar support: from S/N 742748.

  • 750B and 850B alternator removal and installation: through S/N 768529 and from S/N 768530. Cab relay removal and installation: through S/N 741241.

  • 750B and 850B blade-raise relief valve and blade lift cylinder procedures: through S/N 779601 and from S/N 779602.

  • Early control-valve relief service: 750B 2-spool, S/N 725618–756759. 750B 3-spool, S/N 725746–758020. 850B 2-spool, S/N 725688–757225. 850B 3-spool, S/N 725736–752986.

  • Engine (750B): John Deere 6068T, 6-cylinder, 6.785 L displacement, turbocharged diesel

  • Engine (850B): John Deere 6466A, 7.636 L displacement, turbocharged and aftercooled diesel

  • Electrical System: 24-volt, 40 amp alternator in the general specifications. The alternator service section also identifies 16 amp TA-Series and 42 amp BH-Series and BE-Series units.

  • Transmission: Hydrostatic with splitter drive, pressure-lubricated helical gears

  • Hydraulic System: Open center, 13 790 kPa (2000 psi) pressure (750B general specification), 15 514 kPa (2250 psi) pressure (850B general specification). The 750B LT system relief valve is specified at a nominal 2250 psi from S/N 779602.

  • Track Shoe Count: 37, 40, or 43 depending on configuration

File & Download Details
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Listing ID:
28871
Seller:
Amanda Jackson
File Size:
87.83 MB
File Type:
PDF
Language:
English
Pages:
815
Printable:
Yes
Delivery:
Download link on the confirmation page and by email after payment.
Download link validity:
3 days after purchase. Your saved PDF does not expire.

John Deere Manual Features & Selected Content Preview

John Deere’s May 1994 crawler bulldozer repair manual (P/N TM1476) covers the 750B and 850B. It includes model-specific procedures for removing and installing the engine and servicing the crawler’s drivetrain, undercarriage, and blade hydraulics.

PDF Format and Navigation

Search and chapter bookmarks. Most pages have searchable text, and PDF bookmarks lead to sections and individual procedures. A few scanned pages are image-only. Zoom in to read small circuit and wiring labels.

The download is one printable, 815-page PDF, including the original cover and the closing safety page.

Hydrostatic Drive, Undercarriage, and Blade Repairs

These are selected workshop topics. The manual also includes park brake service and drawings for dealer-fabricated tools.

  • Tracks and final drives: Track shoe and split master link service, track adjuster repair, and axle shaft, bearing, and reduction gear work.
  • Hydrostatic transmission: Pump removal and inspection, charge pump disassembly and assembly, and steering and return-to-neutral linkage service.
  • Engine and cooling: Engine and oil pan removal and installation, fuel-system bleeding, and radiator and oil cooler removal.
  • Blade hydraulics: Hydraulic pump and dozer control valve service, relief valve specifications, and blade lift cylinder disassembly and assembly.
  • Electrical and cab systems: Alternator replacement, wiring and connector identification by model and serial number, and an air-conditioning pressure diagnostic chart.

The manual is written for experienced technicians. Its serial-number-specific illustrations help you identify the applicable charge pump assembly or wiring layout before disassembly.

Engine Work and Post-Repair Testing

The engine section covers work on the installed engine and removal and installation from the crawler. For complete internal engine repair, John Deere directs technicians to the applicable component technical manual. The separate TM1332 Operation and Test manual covers system operation and testing, including the initial startup procedure after hydrostatic transmission repair.

Cooling Capacity and Track Fastener Examples

The 850B cooling system capacity is listed as 9 US gal (34 L) in the refill capacities table.

For standard track shoes with 5/8-in. cap screws on the 750B and 750B LT, the track shoe table gives an initial torque of 120 ± 12 lb-ft (163 ± 16 N·m) followed by a 120° turn. The 750B LT swamp-shoe row specifies a 180° turn after the same initial torque. These rows exclude the split master link.

Technical Safety Notice
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Performing service on mechanical equipment involves inherent risks. By purchasing, you acknowledge that RepairLoader provides original manufacturer data for informational purposes. Always prioritize safety: use correct tools, wear protective gear, and consult a certified professional if you are uncertain of any procedure.

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John Deere 750B/850B Crawler Bulldozer Repair Manual — 1993 (P/N TM1476) $38.70