TEI TE260, Руководство по обслуживанию и ремонту, Страница: 18 / 35

TE260 TROUBLESHOOTING
PROBLEM
F. Drilling rate falls off quickly
G. Hammer oscillation stops
immediately or won’t start
H. Drill will hammer but won’t
rotate
PROBABLES CAUSES
Hydraulic lines have been torn or
crushed
Severe hydraulic leakage
Shank failure
Hammer inside cylinder is
damaged
Stuck or broken shuttle valve
Stuck or broken hammer (oil will
leak from rotation housing and
backhead if hammer is broken)
Supply or return hose damaged or
clogged
Hose to rotation collapsed or
kinked
Coupling failure
Rotation motor fouled with
foreign material
Broken shank
Worn chuck (splines completely
gone)
Hydraulic control valve failure
Rotation gear failure
REMEDY
Check hydraulic system
Check and replace faulty part
Replace shank and check related parts
for damage
Inspect cylinder, backhead, and
hammer for galling and/or scoring;
replace assembly if necessary
Remove tie rod and inspect shuttle
valve and valve body
Inspect cylinder, backhead, and
hammer for galling and/or scoring;
replace assembly if necessary
Check for drill supply pressure at
console
Replace
Replace
Clean and inspect; replace worn parts
Replace
Replace
Repair or replace valve
Replace worn parts
Section 3 Page 3-7