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JT5 Operator’s <strong>Manual</strong> Service - 139<br />
50 Hour<br />
Change Hydraulic Filter<br />
(Initial Service)<br />
Change hydraulic filter (shown) after first 50 hours.<br />
Check Rotation Gearbox Oil Level<br />
Check rotation gearbox oil level every 50 hours. Oil<br />
should be visible at plug (2). Add MPL at plug (1) as<br />
needed.<br />
IMPORTANT: Drill frame must be level for<br />
accurate reading.<br />
Inspect Thrust Rollers<br />
Inspect thrust rollers every 50 hours. Clean or<br />
replace if they do not turn freely.<br />
CMW
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