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![]() TM 5-2420-222-20-1 
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED 
MALFUNCTION 
TEST OR INSPECTION 
CORRECTIVE ACTION 
28. HYDRAULIC EARTH DRILL OVERHEATS 
Check hydraulic earth drill bleed oil line (1) for sharp bends and kinks. 
a. If oil line (1) has sharp bend or kink, replace (page 2-1550). 
b. If oil line (1) does not have sharp bend or kink, replace hydraulic earth drill boring head (page 2- 
1870). 
2-136 
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