Komatsu D32E-1, D38E-1, D39E-1 Dozer Service Manual

Table of Contents

This shop manual includes information for locations,
INTRODUCTION SECTION 1 specifications, service/special tools, tolerances, pressures, lubricants and sealants, special torques, tests and adjustments, assembly tips and service bulletin references for various components of the machine. This shop manual is divided into major sections. These sections are indexed by title and divided by individual section index tab. To use this shop manual, locate the section required and turn to that section index tab.

MISCELLANEOUS SECTION 2
COOLING SECTION 6
DRIVE TRAIN SECTION 7
TORQUE CONVERTER SECTION 7B
TRANSMISSION SECTION 7C
STEERING DRIVE SECTION 7E
SPROCKET DRIVE SECTION 7F
ELECTRICAL SECTION 8
HYDRAULICS SECTION 10
PUMPS AND MOTORS SECTION 10A
CONTROL VALVE SECTION 10B
CYLINDERS SECTION 10C
POWER SECTION 12
UNDERCARRIAGE SECTION 14
TRACK CHAIN SECTION 15
MOUNTED EQUIPMENT SECTION 17

STRUCTURE, FUNCTION & MAINTENANCE STANDARDS

The transmission is designed to provide high speed shifting by use of hydraulically actuated clutch packs. It has three forward and three reverse speeds. Gears are mounted on four shafts; directional (input) shaft, range (output) shaft, countershaft and reverse idler shaft. The output shaft and pinion gear of the transmission F transmits power to the bevel gear carrier in the rear main frame.

• In the steering drive, power transfer is from the bevel gear and carrier assembly through the clutch and brake discs I and J to the planet gear carriers out the final drive 1) pinion shaft to the sprockets 1! and on to the tracks. In normal mode, the clutch discs are held stationary by the clutch shoes allowing the planet gear to walk around the clutch disc sun gear carrying the planet gear carriers with them.

• In a turn, the clutch disc on the side to which the turn is made is released from the clutch shoe. When the clutch disc is released, the planet gears rather than turning the planet gear carrier, rotate freely on their respective shafts and transfer motion to the free clutch disc.
At this time, the track on this side of the machine is just being carried along the ground. When the track is held stationary, the clutch disc is still free and the transfer of motion is to the free clutch disc as before only now the brake disc is held by the brake shoe preventing the sprocket drive pinion shaft from turning.