1979 Cub Cadet Tractors 86-1650 Service & Repair Manual (P/N GSS-1464)
146 Pages • 12.70 MB • Instant, Printable PDF
Cub Cadet Models Covered & Key Technical Specifications
Models: International Cub Cadet 86, 108, 109, 128, 129, 149, 169, 800, 1000, 1200, 1250, 1450, 1650
Sub-models / Variants: Standard Transmission, Hydrostatic Drive, Models with Creeper Attachment, Models with Hydraulic Lift, Models without Hydraulic Lift, Late Production Models with Self-Unloading Check Valves
Model Years: 1979
Serial Numbers: Models 1250 S/N 597244 and below, 1250 S/N 597245 and after, 1450 and 1650 S/N 590521 and below, 1450 and 1650 S/N 590522 and after, 109/129/149/169 Below S/N 503725, 109/129/149/169 S/N 503275 and above, Cub Cadets S/N 612808 and above
Technical Data:
- Clutch type: Single dry disc, spring loaded
- Clutch size: 4-1/2 inches
- Clutch loading spring free length: 6.70 inches
- Clutch loading spring test length: 5.18 inches
- Clutch loading spring test load: 235 to 240 lbs
- Front PTO set screw torque (1/4 x 1/2): 60 to 72 in. lbs.
- Rear PTO speed: 515 rpm CCW at governed engine speed
- Reduction drive ratio: 4 to 1
- Differential ratio: 13 to 46
Cub Cadet Manual Features & Content Preview
The September 1979 Revision 2 (publication GSS-1464) serves as the primary factory reference for the late-seventies IH Cub Cadet line. Spanning 146 pages, this official International Harvester publication documents chassis and equipment configurations, including the transition to self-unloading check valves. It provides clear informational value for mechanics and DIY enthusiasts by streamlining diagnostics and part identification during everyday workshop routines.
- Covers 1979 International Cub Cadet 86 through 1650 models.
- Details both gear-drive and hydrostatic transmission variants, with or without hydraulic lift systems.
- Contains 56 exploded-view diagrams, 3 wiring schematics, 5 torque-specification tables, and 2 detailed hydrostatic troubleshooting flow charts.
Chassis and Equipment Coverage
This section documents the chassis and specialized equipment across a wide range of International Cub Cadet tractors. Supported models include the 86, 108, 109, 128, 129, 149, 169, 800, 1000, 1200, 1250, 1450, and 1650. The documentation outlines engine removal and installation, front axle steering systems, and wheel bearing service. Additional chapters break down the standard transmission and hydrostatic drive units. You will find specific details regarding internal brakes, external disc brakes, and the creeper attachment. Electric and hydraulic power lift systems are thoroughly detailed with wiring diagrams, component identification, and troubleshooting procedures aligned with standard factory protocols.
Specification and Reference Highlights
Technical sections provide standardized torque values for nuts, bolts, and hydraulic fittings in both foot-pounds and Newton meters. Fast, accurate reference data is crucial on the bench. The manual lists clutch spring dimensions with test loads of 235 to 240 lbs, while hydrostatic charge pump relief valve pressure settings are documented for various lift configurations. Rear PTO speed for these units is specified at 515 rpm at governed engine speed. Furthermore, the transmission section details gear backlash ranges of .003 to .005 inches for differential bevel gears. Prior to performing any maintenance or adjustments, operators and technicians must review the built-in safety protocols and load limits to prevent equipment damage or personal injury. This documentation strictly serves as an overview of the publication contents and factory specifications.
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