1979 Cub Cadet Tractors 86-1650 Service Manual (146 P.)
Cub Cadet service documentation covering models 86 through 1650 with complete transmission, hydrostatic drive, and differential specs. Includes clutch, brake, and PTO adjustment procedures with torque data GSS-1464.
Manual Preview
Sample pages from the 1979 Cub Cadet Tractors 86-1650 Service Manual (146 P.) manual
Purchase & Download
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
Build 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
Technical Scope for the 1979 International Cub Cadet 86–1650
- Covers 1979 International Cub Cadet 86 through 1650 models, including gear-drive and hydrostatic transmission variants with or without hydraulic lift systems.
- Official International Harvester publication GSS-1464, Revision 2, issued September 1979.
- Contains 56 exploded-view diagrams, 3 wiring schematics, 5 torque-specification tables, and 2 detailed hydrostatic troubleshooting flow charts.
- Accessible from your device as soon as the order is placed.
- Laid out for standard letter and A4 printing.
- Permanent availability in your purchase account — no re-buy required.
- This September 1979 Revision 2 is the primary factory reference for the late-seventies IH Cub Cadet line, documenting chassis and IH equipment configurations including the transition to self-unloading check valves.
Chassis and Equipment Coverage
This publication documents the chassis and specialized equipment for International Cub Cadet tractors including models 86, 108, 109, 128, 129, 149, 169, 800, 1000, 1200, 1250, 1450, and 1650. The documentation covers engine removal and installation, front axle steering systems, and wheel bearing service. Additional chapters address the standard transmission and hydrostatic drive units, including internal brakes, external disc brakes, and the creeper attachment. Electric and hydraulic power lift systems are detailed with wiring diagrams, component identification, and troubleshooting procedures for the factory workshop manual standard.
Specification and Reference Highlights
Technical sections provide standardized torque values for nuts, bolts, and hydraulic fittings in both foot-pounds and Newton meters. The manual lists clutch spring dimensions with test loads of 235 to 240 lbs. 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. The transmission section details gear backlash ranges of.003 to.005 inches for differential bevel gears. Note: This page is a contents overview for the manual. It does not provide repair or diagnostic instructions. An official 146-page International Harvester OEM publication covering the 1979 International Cub Cadet 86–1650, documenting chassis, transmission, and hydrostatic drive specifications for these series-production models.
Manual FAQ, Purchase & Download Details
Customer Reviews
Read what our customers say about this Cub Cadet Tractor manual and share your own experience.