PHQ250JHMAVL Jackleg MK 1 Parts and Repair Manual PDF

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Page 32 Rotate the control handle forward so the piston in the built in cylinder pushes the drill forward Run the drill under full leg pressure at partial throttle for no more than 15 minutes. Running the drill under controlled conditions in the shop accomplishes several things: The rifle bar polishes the bronze of the rifle nut. The piston splines polish the bronze of the chuck driver nut. The drill doctor listens for irregular sounds and to be sure the drill runs smoothly. The drill doctor places his hand on the cylinder of the drill near where the front head joins the cylinder to check for heat that may be generated If the drill sounds smooth during the running and the body remains fairly cool to the touch during and after the run in period the Rock Drill Doctor can be satisfied that the repairs were done properly and that the drill is running properly. This ensures smoother running later on when the drill is run at full throttle in actual drilling operations. The drill is now ready for torque testing and already in the proper position on the test bench. Testing the Jackleg Remove spring loaded shank steel assembly from the bench and replace with the torque test head Before engaging the drill to the head make sure the torque head is “loosened off” at least five rotations. This will allow the drill revolution to build up momentum going into the torque test. Move the drill forward with the pneumatic pusher cylinder built into the torque test bench. Insert the rod shank adapter on the torque tester into the chuck bushing and close the steel retainer Release the feed pressure on the drill by shutting off the air to the pusher leg. With the drill in position and no pusher leg pressure suddenly throw the throttle handle forward opening the valve fully to operate the drill for a short burst at full throttle ending in a stall. Observe the reading on the air consumption gauge, which should read 5000 LPM (170 CFM). When the drill stalled the reading on the torque gauge should be minimum 2000 Nm (140 ft lbs) When testing a sinker drill, the same test procedure is used. Version 200711
Page 33 PICTURE SHOWS A STOPER DRILLDURING RUN-IN PROCEDURE Water Testing Procedure. Testing of water connections and the flow of water through the drill can be accomplished while the drill is “running in” on the test bench. The air connection to the drill is already in place, leave the air valve turned on. Shut the hammering of the drill down temporarily using the throttle handle. Connect the water hose to the proper connection on the drill and turn on the water valve. Connect the banjo fitting on the spring loaded shank assembly to a drain hose (into a bucket) Advance the throttle handle forward to engage the valve to the second notch. Water should be exiting from the water tube at the front of the drill and coming out of the drain hose. Return the throttle lever to the “off” position and the water should stop running in the drain. With the water pressure still on check for leaks around the water inlet and automatic water valve. NOTE: The water regulation control valve will not work if the water pressure supplied to the drill is equal to or greater than the air pressure supplied to the drill. The ideal air pressure for PHQ drills is 7 bar (100psi). The ideal water pressure is 3 bar (45 psi). Version 200711
Page 1 and 2: PRINTED 2/12/2008 PHQ250 Jackleg Pa
Page 3 and 4: Certificate of Performance Page 3 T
Page 5 and 6: Page 5 NOTE: PHQ continuously updat
Page 7 and 8: Rockdrill Repair Shop The rock dril
Page 9 and 10: Page 9 Version 200711
Page 11 and 12: Page 11 Maintenance Procedures The
Page 13 and 14: Page 13 Version 200711
Page 15 and 16: Page 15 17. Remove the operating ha
Page 17 and 18: Page 17 31. Unscrew the air bend nu
Page 19 and 20: Page 19 41. Examine all the parts f
Page 21 and 22: Page 21 54. Once the valve plug (A7
Page 23 and 24: Front Cylinder Assembly Inspection
Page 25 and 26: Page 25 72. To replace the chuck bu
Page 27 and 28: Assembly Procedures 77. To install
Page 29 and 30: 88. Check to insure the proper fit
Page 31: Page 31 101. Fit the clevis body (A
Page 35 and 36: Page 35 PHQ250 Anti-Vibration Jackl
Page 37 and 38: Page 37 Troubleshooting Guides Prob
Page 39 and 40: Troubleshooting Guides Problem Prob
Page 41: Page 41 Troubleshooting Guides Prob

PHQ250JHMAVL Jackleg MK 1 Parts and Repair Manual PDF

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