Name: __________________________

DTEC 105Komatsu D155 Transmission Lab

Serial Number:

Use The Manual Provided To Answer The Following Questions:

1. Which of the two main control valves controls direction, and which controls speed?

2. What make the No. 5 clutch assembly different from the other clutches in the transmission?

3. How many different valves are located in the transmission control unit? What are their functions?

4. Why would you want a torque converter in this application?

5. What type of clutch is used to steer the machine?

6. What are the type of bearings are used in the axle assembly?

7. How do you adjust backlash between the bevel pinion and bevel gear?

8. State Which Of The Following Is The Input, Which Is Held, And Which Is The Output.

Clutch No.1:Sun Ring Carrier

Clutch No.2: Sun Ring Carrier

Clutch No.3: Sun Ring Carrier

Clutch No.4:Sun Ring Carrier

9. How many plates and how many discs are in each on the clutch packs?

No.1 Clutch:

No.2 Clutch:

No.3 Clutch:

No.4 Clutch:

No.5 Clutch:

10. On page 23-64, do the “Measuring Piston Stroke” test and record results.

11. Find the gear ratios for the following planetary packs.

No.1 Clutch: No.2 Clutch:

No.3 Clutch: No.4 Clutch:

12. What are each of two output shafts for?

Bevel gear:

Spline Shaft:

13. Color the oil flow for 2nd Forward & 2nd reverse on the schematics on the following

pages.

Measured SpecificationNo. 1 ClutchNo. 2 ClutchNo. 3 ClutchNo. 4 Clutch