Table 3-1. Direct Support Troubleshooting Procedures. - Continued
TM 5-5420-209-12
Malfunction
Test or Inspection
Corrective Action
2.
CLEARANCE AND MARKER LIGHTS INOPERATIVE - Continued
Step 2.
Inspect for loose or damaged leads and connectors.
a. Secure loose connectors.
b. Notify unit maintenance if lights are still inoperative.
3.
BOOM INOPERATIVE
Step 1.
Step 2.
Step 3.
Step 4.
Step 5.
Check to see if PTO is engaged.
Engage PTO and follow instructions on hydraulic console.
Model RBT check hydraulic selector valve.
Set hydraulic selector to REAR HYDR position.
Check that bay locking cylinder pin is retracted.
Remove quick release pin, operate pin control lever on hydraulic console.
Check hydraulic oil level in hydraulic reservoir.
Add oil as specified in LO 5-5420-209-12.
Check hydraulic lines and connections for leaks.
a. Tighten loose connections.
b. If leaks persist, or if boom is still inoperative, notify unit maintenance personnel.
4.
BOOM WILL NOT ELEVATE WITH BAY INSTALLED
Step 1.
Check engine speed of transporter.
Adjust engine speed to about 1700 rpm on Model 2280, about 2000 rpm on Model RBT.
Step 2.
Check hydraulic oil level in hydraulic reservoir.
Add oil as specified in LO 5-5420-209-12.
Step 3.
Inspect hydraulic lines and connections for leaks.
a. Tighten loose connections. If leaks persist, notify unit maintenance personnel.
b. Operate boom several times to purge air from system. If boom will still not lift heavy loads
notify unit maintenance personnel.
3-3
