Factory Specs

Scroll down to see information on the factory specs for the Engine, Transmission, PTO, Chassis, Weight, Tires, and Speed.

 

Engine:

Type: "in series" 4 cylinder Gasoline / Carbureted. All engine specs are for the PB 100  unless otherwise noted. The TA/TB motor was only slightly larger and more powerful. Tractor specs remain the same.

Engine Power:

  • Max Horse Power: 25 HP @ 2800 rpm (PB 100)  -or-  27 HP @ 2800 (TA/TB)
  • Rated Horse Power: 23 HP @ 2800 rpm (PB 100)
  • Max Torque: 46.9 ft-lb @ 2200 rpm 

PTO Power:

  • Horsepower: 23 HP @ 2800rpm
  • Torque: 46.9 ft-lb @ 2400 rpm

Displacement:

  • 60.2 ci / 1.0L / 987cc (PB 100)  -or-  71.3 ci 1.2L / 1169cc (TA/TB)

Bore/Stroke:

  • 2.677 x 2.677 in (PB 100)  -or- 2.8 x 3.0 in (TA/TB)

Compression:

  • Ratio: 8.6:1 (PB 100 and TA/TB)
  • Pressure: 145 lb.in^2 (10.2 kg/cm^2)

RPM:

  • Rated: 2800
  • Maximum: 3150

Valves:

  • Position: Overhead Valve System
  • Valve Clearance: Intake / Exhaust - 0.010in (.25mm) 

Electrical:

  • 12v System, Negative Ground
  • Ignition Order: 1, 3, 4, 2

Air Cleaner:

  • Oil Bath with pre filter

Cooling:

  • Liquid Cooled
  • Geared wing water pump
  • Thermostat: 180*F begins to open, 258*F fully open

A Real World Satoh Bison Tractor Test has been conducted by The University of Nebraska. Here is a link to their findings:

http://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=2476&context=tractormuseumlit

 

Transmission:

Type: dual speed un-synchronized gear

Forward Gears: 6 (3 Low / 3 Hi)

Reverse Gears: 2 (1 Low / 1 Hi)

Clutch:

  • Type: Single Dry Disk
  • Diameter: 7.25 in (184.2 mm)

 

Power Take Off:

Type: Dual Speed

Lever Down (Low): 540 RPM

Lever Up (High): 1000 RPM

 

Hydraulic System:

Type:

  • One Cylinder

Pressure of Relief Valve Setting:

  • 1365 +/- 71.10 lb/in^2 (115 +/- 5 kg/cm^2)

Maximum Lift Power at Lower Link:

  • 1,102.5 lb (500kg)

Diameter of Ram Piston:

  • 2.76 in (70mm)

Stroke of Ram Piston:

  • 3.15 in (80mm)

Material of Ram Piston:

  • Cast Iron FC-25

Type of Hydraulic Pump:

  • Pressure Loading Type

Name and Model of Hydraulic Pump:

  • KAYABA-DOWTY, GP-1

Output of Hydraulic Pump:

  • 4.1 gal/min (17 ltr/min) @2800 engine rpm

Control Valve (Height Control):

  • Spool Valve, Pilot Type

Lock Valve:

  • In-line Non-return Valve (Automatic Flow Control)

Control Valve (Sub-Control):

  • Spoool Valve, 3-way Flow Change Type

Strainer Mesh:

  • 100 meshes

Hydraulic Oil:

  • Turbine Oil No 120 (Capacity .92 gal - 3.5 lit)

 

Wheelbase/Chassis:

Wheelbase: 60.43 in

Steering: Mechanical

Brakes: Independent differential mechanical internal expanding shoe

 

Weight:

2105 lbs (no weights/loader/implement) / 3640 lbs (with ballased wheel weights)

 

Tires:

Front: 5.00 - 15

Rear: 11.2 - 24

 

Speed Information:

Low Selector 1st Gear: 0.853 mph

Low Selector 2nd Gear: 1.220 mph

Low Selector 3rd Gear: 4.620 mph

Low Selector Reverse: 1.600 mph

High Selector 1st Gear: 1.636 mph 

High Selector 2nd Gear: 2.337 mph

High Selector 3rd Gear: 8.843 mph

High Selector Reverse: 3.076 mph