TM 5-3820-241-34
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 3. Check for defective tramming motors.
5 AIR MOTOR INOPERATIVE OR OPERATES TOO SLOW
Step 1. Check for defective air pressure regulator.
Step 2. Check tor defective air motor.
6 HYDRAULIC SYSTEM INOPERATIVE OR OPERATES ERRATICALLY
Step 1. Check for defective control valve.
Step 2. Check for defective hydraulic pump.
Step 3. Check for defective air motor.
Check for defective hydraulic pump.
7 FEED EXTENSION CYLINER WILL NOT OPERATE
Step 1. Check for defective feed control valve.
Repair or replace feed control valve (para 5-14, 5-16).
Step 2. Check tor defective feed extension cylinder (para 3-14, 3-16).
8 BOOM LIFT CYLINDER WILL NOT OPERATE
Step 1. Check for defective boom lift control valve.
Repair or replace hoom lift control valve (para 5-14, 5-16).
Step 2. Check for defective boom lift cylinder.
Repair or replace boom lift cylinder (para 3-5, 3-7).
9 FEED SWING CYLINDER WILL NOT OPERATE
Step 1 Check for defective feed swing control valve.
Repair or replace feed swing control valve (para 5-14, 5-16).
Step 2 Check for defective feed swing cylinder.
Repair or replace feed swing cylinder (para 3-8, 3-10).
10 BOOM SWING CYLINDER WILL NOT OPERATE
Step 1. Check for defective boom swing control valve.
Repair or replace boom swing control valve (para 5-14, 5-16).
Step 2. Check for defective boom swing cylinder.
Repair or replace boom swing cylinder (para 3-11, 3,13).
11 FEED EXTENSION CYLINDER WILL NOT OPERATE
Step 1. Check for defective feed extension control valve.
Repair or replace feed extension control valve para (5-14, 5-16).
Step 2. Check for defective feed extension cylinder.
Repair or replace feed extension cylinder (para 3-14, 3-16).
12 TILT OR SWING ACTION IS INOPERATIVE
Step 1. Check for defective tilt or swing control valve.
Step 2 Check for defective air motor.
Step 3. Check for defective hydraulic pump.
Step 4. Check for defective tilt or swing cylinder.
Repair or replace tilt cylinder (para 3-2, 3-4), feed swing cylinder (para 3-8, 3-10), or boom swing cylinder.
13 LIFT INOPERATIVE OR ERRATIC
Step 1. Check for defective control valve.
Repair or replace hydraulic control valve (para 3-22, 3-24).
Step 2. Check for defective hydraulic pump.
Step 3. Check for defective motor.
Step 4 Check for defective swing cylinder.
Repair or replace swing cylinder (para 3-8, 3-10).
14 DRIFTER DRILL FAILS TO TRAVEL ON CARRIAGE OR TRAVELS TO SLOW
Step 1. Check for defective feed motor.
Step 2 Check for defective drill motor.
Step 3. Check for defective feed control valve.
Repair or replace feed control valve (para 5-14, 5-16).
Step 4. Check for defective feed transmission.
Repair or replace feed transmission (para 5-6, 5-8).
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