Figure 1-9. M764 Earth Boring Machine and Polesetter Truck, Preventive Maintenance Locators - continued

TM 9-2320-209-20-1

Table 1-9. Organizational Preventive Maintenance Checks and Services Semiannual Schedule

for M764 Earth Boring Machine and Polesetter Truck - Cont

Item

Procedures

Item

To Be

Check for and Have Repaired,

No.

Inspected

Replaced, Adjusted as Necessary

6. Check that winch cable (4) is not kinked, and

(cont)

does not have broken wires or broken and

loose clamps.

7. Wind winch cable (4) back on drum (5). Refer

to TM 9-2320-209-10.

8. Check adjustment of winch automatic brake.

Automatic brake should hold a 1,000 pound

load without slipping. Refer to Vol 3,

chapter 19, para 19-3 for test and adjust-

ment procedures.

Earth boring

1. Check tension on horizontal and vertical

machine

drive chains as follows:

(a) Take off drive chain covers. Refer to

Vol 3, chapter 19, para 19-17.

(b) Check that there is 1/8-inch slack in

leveling worm drive chains (1 through 4).

1-58