Hydraulic Sinker Drill - Tool-Smith
Hydraulic Sinker Drill - Tool-Smith
Hydraulic Sinker Drill - Tool-Smith
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17<br />
PROBLEM CAUSE SOLUTION<br />
<strong>Tool</strong> operates slow Low gpm supply from power unit. Check power unit for proper<br />
flow (7-9 gpm)<br />
High backpressure. Check hydraulic system for<br />
excessive backpressure<br />
(over 250 psi).<br />
Couplers or hoses blocked. Remove obstruction.<br />
Orifice plug blocked. Remove restriction.<br />
Oil too hot (above 140°F) Check power unit for proper oil<br />
or cold (below 60°). temperature. Bypass cooler to<br />
warm oil up, or provide cooler to<br />
maintain proper temperature.<br />
Relief valve set too low. Adjust relief valve to<br />
2100-2250 psi.<br />
<strong>Tool</strong> gets hot. Hot oil going through tool. Check power unit. Be sure flow<br />
rate is not too high causing part<br />
of the oil to go through the<br />
relief valve. Provide cooler to<br />
maintain proper oil temperature<br />
(under 140°F).<br />
Check relief valve setting.<br />
Oil leakage on drill steel. Lower piston or drive hex Replace seals.<br />
seal failure.<br />
Oil leakage through charge Upper piston seal failure or Replace seals, recharge or<br />
valve cap. accumulator or o-ring failure replace accumulator<br />
or accumulator charge loss diaphragm.<br />
or failure.<br />
Oil leakage around trigger. Valve spool seal failure. Replace seals.<br />
Low rotation torque. Motor not completely broken in. Continue operation to break in<br />
motor.<br />
Excessive oil temperature Provide cooler to maintain oil<br />
causes operating pressure loss. temperature (under 140°F).<br />
Damage to motor clearances. Repair as required.<br />
Insufficient air or water. 20 CFM minimum.<br />
Mechanical binding during drilling. Take care to guide drill straight.
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