international harvester 3688

1981 - 1985

30 Series

Row-Crop tractor

30 Series

Row-Crop tractor

Manufacturer

International Harvester

Row-Crop tractor

Built in Rock Island, Illinois, USA

Total built

2,572

Original price was $45,000 in 1981

3688 Hi-Clear

high-clearance model

International Harvester 7.1L 6-cyl diesel

16-speed partial power shift

Drawbar (claimed)

100.2 hp 74.7 kW

PTO (claimed)

113 hp 84.3 kW

Drawbar (tested)

99.21 hp 74.0 kW

PTO (tested)

113.72 hp 84.8 kW

Two- or four-wheel drive

Final drives

bull gear

Differential lock

rear

Power steering

Hydraulic wet disc brakes

Cab standard with heat and air-conditioning. Optional burgundy or western finish interiors.

Fuel

50 gal 189.2 L

Hydraulic system

22.5 gal 85.2 L

Type

closed center

Capacity

22.5 gal 85.2 L

Valves

2 to 4

Pump flow

18 gpm 68.1 lpm

Total flow

27 gpm 102.2 lpm

Steering flow

12 gpm 45.4 lpm

Rear Type

II

Control

draft sensing

Rear PTO

independent

Rear PTO Type

540/1000 (1.375)

Engine RPM

540@2100

 

1000@2100

Wheelbase

105 inches 266 cm

Weight

11300 to 13200 pounds

Front tire

11L-15

Rear tire

18.4-34

Location:

Serial number plate on the right side of the tractor frame, ahead of the rear axle.

1981

501

1982

1743

1983

2482

1984

2695

1985

3068

FAQ: How to read a serial number table.

Ground

negative

Battery volts

12

Buyer's Guide 1982 published by International Harvester

International 30 Series Tractors published by International Harvester

Operator's Manual 3088, 3288, 3488-Hydro and 3688 Tractors (1258513C1) published in 1981

Tractors 90 & 110 HP published in 1981, by International Harvester

3288 and 3688 Product Guide published in 1981, by International Harvester