PHQ250JHMAVL Jackleg MK 1 Parts and Repair Manual PDF

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101. Fit the clevis body (A693A) onto the shaft of the clevis body spindle
with the spindle locating pin (D2546) lined up properly. Thread on the
clevis body spindle nut (D1982) and tighten.
102. Insert the clevis body spindle assembly into
the cylinder lug bush. Fit the spindle thrust
washer (D1392) two lock washer keys (D1426)
spindle spring (C1571) spindle lock washer
(C1519) and spindle nut (C1527).
103. Take care when slipping the lock washer
over the spindle that the keys are in the proper
place. Tighten the spindle nut to give the desired
degree of friction between the clevis assembly
and the cylinder lug bush.
Your PHQ250JHMAVL Anti-vibration drill is now complete and ready for testing.
Running in
104 Place the assembled drill on the PHQ test bench and run for approximately 15 minutes at low
throttle to “run-in” the assemble parts and insure the parts in the drill are fully lubricated before
testing the torque of the drill. The PHQ test bench supplied with compressed air at a minimum
volume of 5.0 cu m/m (175 cfm) and minimum pressure of 620 kPa (6 Bar) (90 psi) is required
to adequately test Jackleg and Stoper Pneumatic Rock Drills.
Remove the pusher leg from the jackleg drill and connect the drill to the adapter on the saddle.
Move the drill saddle forward with the pneumatic pusher cylinder built into the test bench.
Insert the spring loaded collared rod shank into the chuck bushing of the rock drill and close the
steel retainer locking the drill into position so that it does not jump back if leg pressure releases.
Version 200711