Table 3-2. TROUBLESHOOTING-Continued
9.
(MALFUNCTION) BOOM WILL NOT LOWER.
Step 1. (Test) Check to see if safety pawl is engaged.
(Corrective Action) Lift boom slightly, disengage safety pawl and lower boom.
10.
(MALFUNCTION) HARD LEVER OR PEDAL OPERATION.
EXCESSIVE LEVER OR PEDAL PLAY.
Step 1. (Test) Check for correct adjustment.
(Corrective Action) Adjust levers and/or pedals.
Step 2. (Test) Check for lack of lubrication.
(Corrective Action) Lubricate levers and/or pedals.
11.
(MALFUNCTION) CLAMSHELL OPERATES ERRATICALLY.
Step 1. (Test) Check to see if rear drum brake is dragging.
(Corrective Action) Adjust rear drum brake.
Step 2. (Test) Check to see if front and rear drum clutches are slipping or grabbing.
(Corrective Action) Adjust front and/or rear drum clutches.
Step :3. (Test) Check for proper lubrication of bucket hinges.
(Corrective Action) Lubricate bucket hinges.
12.
(MALFUNCTION) DRAGLINE NOT OPERATING PROPERLY.
Step 1. (Test) Check dump cable for proper adjustment.
(Corrective Action) Shorten or lengthen dump cable for proper operation.
Step 2. (Test) Check front or rear drum brakes for proper adjustment.
(Corrective Action) Adjust front and/or rear drum brakes.
Step :3. (Test) Check to see if fairlead rollers or sheaves are sticking.
(Corrective Action) Lubricate fairlead rollers and/or sheaves.
13.
(MALFUNCTION) SHOVEL NOT OPERATING PROPERLY.
Step 1. (Test) Check that dipper pitch brace is properly adjusted for material being moved.
(Corrective Action) Adjust dipper pitch brace.
Step 2. (Test) Check to see that front and rear drum brake are properly adjusted.
(Corrective Action) Adjust front and/or rear drum brakes.
14.
MALFUNCTION BACKHOE NOT OPERATING PROPERLY.
Step 1. (Test) Check for correct dipper pitch.
(Corrective Action) Adjust dipper pitch.
Step 2. (Test) Check that cable is in sheave.
(Corrective Action) Place cable in sheave.
Step :3. (Test) Check front and rear drum brakes for proper adjustment.
(Corrective Action) Adjust front and/or rear drum brakes.
15.
(MALFUNCTION) PILE DRIVER NOT OPERATING PROPERLY.
Step 1. (Test) Check to see if hammer is binding on pile leads.
(Corrective Action) Lubricate the hammer.
Step 2. (Test) Check front and rear drum brakes for slippage.
(Corrective Action) Adjust front and/or rear drum brakes.
16.
(MALFUNCTION) ENGINE LACKS POWER.
Step 1. (Test) Check t( see if fuel filter (sediment bowl) is clogged.
(Corrective Action) Service fuel filter 'sediment bowl.
Step 2. (Test) Check to see if air cleaner is clogged.
(Corrective Action) Service air cleaner.
repairs (table 3-3) may be used during such
3-7. Field Expedient Repairs
emergencies, upon authorization of the unit commander.
Operating difficulties may occur in the field at a time
Equipment so repaired must be removed from operation
when it is imperative that the machine be continued in
as soon as possible, and properly repaired before being
service and when repair parts or supplies are not
returned to operation.
available for normal corrective action. These expedient
3-5
