Thomas built the T-103 and T-133 skid steer loaders with different front and rear hydrostatic pumps, and this 81-page Thomas T-133, T-103 parts catalog PDF (OEM ID 025180-1) settles which part belongs on which machine by factory number. Hydraulics take the largest share of the book, with exploded views breaking down the boom lift and bucket tilt circuits, auxiliary gear pump, control valve, and lift and tilt cylinders, every callout tied to a part number and quantity. Your chain case axles, chain tightener, Quick-Tach plate and control levers get the same treatment, and hydraulic schematics plus wiring diagrams let you trace a circuit before you order. At the control valve, quote 26062 for the red boom detent spool and 18760 for the blue auxiliary spool. A guessed part number costs a week of downtime. Bookmarks jump between systems on screen, and any page prints for the bench, where grease won't matter.
What's Inside This Parts Manual
| System | Pages | Key Topics |
|---|
| Main Frame | 1-15 | Fuel System, Rear Door and Latch, Quick-Tach Assembly, Shields, Seat and Belt, Decals and Paint, Wheel Equipment, Boom Lock |
| Controls | 16-26 | Control Levers and Neutral Centering Device, Foot Pedals, With Lock, Throttle and Diesel Stop Control, Parking Brake, Seat Bar and Neutral Centering Device |
| Final Drive Transmission | 27-31 | Axle Assembly, Chain Tightener Assembly |
| Hydraulic System | 32-52 | Oil Reservoir, Boom Lift Circuit, Bucket Tilt Circuit, Auxiliary Hydraulic Circuit, Auxiliary Gear Pump, Control Valve, Lift Cylinder, Optional Lift Cylinder |
| Hydrostatic Drive System | 53-67 | Hydrostatic Drive Circuit, Front Hydrostatic Pump, T103, T133, Rear Hydrostatic Pump |
| Electrical System | 68-70 | R.O.P.S. Harness, Engine Harness, Alternator, Starter, Battery, Fuel Gauge |
| Engine Equipment | 71-81 | Exhaust System, Air Cleaner, Universal Joint |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Auxiliary Gear Pump Cap Screw Torque | 25-28 ft. lbs. (34-38 N.M) | p. 46 |
| Detent Spool, Boom Red Torque | 2-3 ft. lbs. | p. 48 |
| Aux. Spool, Blue Torque | 2-3 ft. lbs. | p. 48 |
| Control Valve Detent Spool Torque | 2-3 ft. lbs. | p. 48 |
| Control Valve Aux. Spool Torque | 2-3 ft. lbs. | p. 48 |
| Control Valve Screw w/Lockwasher Torque | 2-3 ft. lbs. | p. 48 |
| Hydrostatic Pump Relief Valve Pressure | 3750 PSI (285.5 Bar) | p. 61 |
| Hydrostatic Pump Bolt Torque | 55-60 ft. lbs. (75-81 N.M.) | p. 65 |
