Table 4-1 Organizational Preventive Maintenance Checks
Q - Quarterly
Total man-hours required 7 5
ITEM TO BE INSPECTED
BOOM DRILL CARRIAGE
Inspect the feed chain for proper tension. Adjust if necessary (para 4-23).
DRIFTER DRILL CRADLE
Inspect the wear plates and shims for excessive wear.
Inspect the centralize bushings for excessive wear. Replace defective
bushings (para 4-24).
Inspect hydraulic hoses for leaks or other damage. Replace defective hoses (para 4-15).
Inspect the air hoses for leaks. Tighten loose fittings or replace
defective hoses (para 4-18).
HYDRAULIC CONTROL VALVE
Inspect the hydraulic control valve for leaks and proper operation.
Inspect hydraulic pump for proper operation and leaks
Tighten loose fittings, replace a defective pump (para 4-15)
Inspect the air motor for proper operation and leaks. Check the
motor exhaust air for presence of atomized oil. Adjust airline
lubricator (para 3-20). Replace a defective air motor (para 4-21).
DRILL AND FEED CONTROL VALVE
Inspect the drill and feed control valve for leaks and proper operation.
Tighten loose connections, replace a defective valve (para 4-18).
Inspect the drill motor for proper operation. Make sure it travels freely on the boom.
Check the feed chain for proper tension. Proper tension is a 2 inch
deflection between the front and rear sprockets. Adjust as required (para 4-23).
Check the feed motor for proper operation. Inspect the gear case for
leaks. Report a defective feed motor to direct and general support maintenance.
Inspect the tramming motors for proper operation and leaks.
Report a defective tramming motor to direct support maintenance
Inspect the final drive and drive sprockets for insecure mounting.
Tighten or replace hardware as required.
Refer to LO .53820-241-12 and service the transmission breather.
Section V. ORGANIZATIONAL MAINTENANCE TROUBLESHOOTING
Refer to paragraph 3-5 introductory information and
the purpose of troubleshooting.
Table 4-2 lists the organizational maintenance
troubleshooting malfunctions, tests or inspection
and the recommended corrective action.