Repair and Maintenance Makita Hummer drill M8701

please help to subscribe my channel M8701B Makita MT Combination Hammer 26 mm (1″) 2.3 J Combination Hammer, SDS-PLUS bits High performance and durability at less expense Satisfactory performance: the same feeling of powerful chipping as PUMPKIN PTT2-26DFR 3-Mode operation for “Rotation Only”, “Hammering with Rotation” or “Hammering Only” for multiple applications Re-located operating mode lever for increased protection and durability Improved bit guide for increased bit stability during drilling applications Easy-to-grip handle gives maximum power thrust and provides a sure and comfortable grip in any operation; overhead application, drilling with palm-up or palm-down grip Soft grip provides more comfort and control Powerful 800 W motor delivers 2.3 J of impact energy to handle the most demanding applications Torque limiter stops rotation if bit jams for increased operator safety and enhanced motor protection Forward/reverse lever – position of the switch allows brushes to be positioned so that the drill maintains same speed and torque in forward and reverse Variable speed trigger allows operator to adjust speed based on materials or application One-touch sliding chuck for easy bit installation and removal Depth gauge for increased drilling consistency Recessed lock-on button for continuous use Double insulated Technical info General Support Continuous rating input : 800W Impact Energy : EPTA-Procedure 05/2009: 2.3 J Our experimental conditions: N/A J Capacity: Concrete: 26 mm (1″) Core Bit: 68 mm (2-11/16″) Diamond Core Bit (Dry Type): 80 mm (3-1/8″) Steel: 13 mm (1/2″) Wood: 32 mm (1-1/4″) Blows Per Minute (BPM) : 0 – 4,500 No Load Speed (RPM) : 0 – 1,200 Vibration Level : Hammer Drilling into Concrete: 16.5 m/s² Sound Pressure Level : 90 dB(A) Sound Power Level : 101 dB(A) Noise K Factor : 3 dB(A) Dimensions (L x W x H) : 362x71x194 mm (14-1/4″x2-13/16″x7-5/8″) Net weight : 2.7 – 3.1 kg (6.0 – 6.8 lbs.) Power supply cord : 4.0 m (13.1 ft.)