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MODELS C 12LSH C 12RSH Hitachi Power Tools TECHNICAL DATA SLIDE COMPOUND MITER SAW C 12LSH SERVICE MANUAL C 12RSH LIST Nos. C 12LSH: E941 May 2005 C 12RSH: E942 SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT...
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REMARK: Throughout this TECHNICAL DATA AND SERVICE MANUAL, a symbol(s) is(are) used in the place of company name(s) and model name(s) of our competitor(s). The symbol(s) utilized here is(are) as follows: Competitors Symbols Utilized Company Name Model Name LS1212 MAKITA DEWALT DW708...
8-4. How to Use the Vise Assembly .......................23 8-5. Adjustment of Table Insert Position ....................24 8-6. Cutting Operation ..........................25 8-7. Digital Display Panel (Only Model C 12LSH) .................. 32 8-8. Precautions Concerning Electronic Condition ................33 9. ADJUSTMENT OF COMPONENTS ....................34 9-1.
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11-7. Reassembly Requiring Adjustment ....................56 11-8. Lubrication ............................57 11-9. Product Precision ........................... 57 11-10. Adjustment of Laser Marker Accuracy ..................58 12. REPAIR GUIDE ..........................61 13. STANDARD REPAIR TIME (UNIT) SCHEDULES ............... 67 Assembly Diagram for C 12LSH Assembly Diagram for C 12RSH...
2. MARKETING OBJECTIVE The new slide compound miter saws Models C 12LSH and C 12RSH are introduced. They are compact thanks to the new sliding system that allows only the head portion to slide from the front to the back. They are equipped with the laser marker and the digital display panel that indicates miter/bevel angles (Model C 12LSH only) for increased visibility.
(H1-3/4" x W12-1/4") H50 mm x W260 mm (H1-15/16" x W10-3/16") Digital display panel that indicates miter/bevel angles (15) Powerful 15 amps motor (Only the Model C 12LSH) High dust collecting performance (6) Aggressive tool design (7) Conveniently positioned bevel angle locking...
Therefore, the depth of the main unit remains unchanged (930 mm). The Models C 12LSH and C 12RSH are operable even in tight places such as a place where there is a wall behind.
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Fig. 2-a Fig. 2-b (2) Digital display panel that indicates miter/bevel angles (Only the Model C 12LSH) Use the digital display panel when cutting a workpiece at an optional angle. The digital display panel indicates a miter/bevel cutting angle with a numeric value. There is no reading error caused by visual check between the indicator and the scale.
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(5) High sub fence The Models C 12LSH and C 12RSH have a high sub fence (right and left). Use the high sub fence for miter cutting, left and right bevel cutting or crown molding cutting. The high sub fence supports the workpiece widely for stable cutting.
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Fig. 6 locking. (8) High dust collecting performance The dust collecting performance of the Models C 12LSH and C 12RSH are remarkably higher than the other models thanks to the adoption of new dust guide and gear case. Table 3...
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(9) Positive angle stoppers The Models C 12LSH and C 12RSH have positive angle stoppers in the turn table at the right and the left of the 0˚ center setting, at 15˚, 22.5˚, 31.6˚ and 45˚ settings. Thanks to the positive angle stoppers, positioning can be done more securely than the ball index method utilized in the current Model C 12FSA.
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24 mm (15/16")] 25 mm (1") Right 57˚ (Hitachi 107 x 170 107 x 180 98 x 155 C 12LSH, C 12RSH) (4-3/16" x 6-11/16") (4-3/16" x 7-1/16") (3-7/8" x 6-1/8") Right and left 57˚ 120 x 130 120 x 140...
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(13) Right and left bevel cutting Maximum cutting dimension Table 7 Unit: mm (inch) Maker HITACHI Model HITACHI C 12LSH Max. C 12FSA cutting C 12RSH dimensions 70 x 312 Left 45˚ 70 x 305 55 x 310 57 x 305 Height x Width (2-3/4"...
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By turning the turn table to the left or right and inclining the saw blade section (head) to the left or right, the Models C 12LSH and C 12RSH are capable of compound cutting (bevel + miter, see Figs. 17, 18 and 19) of workpieces with the maximum dimensions shown in Table 8.
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Fig. 17 Fig. 18 Fig. 19 (15) Powerful 15 amps motor The Models C 12LSH and C 12RSH are equipped with a 15-ampere motor. --- 11 ---...
Main body dimensions 595 mm x 930 mm x 710 mm (23-7/16" x 36-5/8" x 27-15/16") (Width x Depth x Height) Weight C 12LSH 30 kg (66.1 lbs.) C 12RSH 29 kg (63.9 lbs.) Coating Gunmetallic silver Packaging Corrugated cardboard box Type: 2-conductor cabtire cable Length: 1.8 m (6 ft)
305 (12") (60 P) 305 (12") (60 P) 305 (12") (60 P) (No. of teeth) Not provided Not provided Laser marker Provided Not provided Laser output <1 mW Digital display Provided (C 12LSH only) None None None --- 14 ---...
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(23-7/16" x 35-13/16" x (22-7/8" x 44-3/32" x mm (inch) 27-15/16") 27-1/4") 26") 29-9/16") C 12LSH 30 (66.1) Product weight kg (lbs.) 22 (48.4) 25.8 (57) 25 (55.1) C 12RSH 29 (63.9) • 305 mm (12") TCT • 305 mm (12") TCT •...
7. PRECAUTIONS IN SALES PROMOTION In the interest of promoting the safest and most efficient use of the Models C 12LSH and C 12RSH Slide Compound Miter Saws by all of our customers, it is very important that at the time of sale the salesperson...
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(3) Warning sign (at the front of sub fence (A) and sub fence (B)) Fig. 22 Fig. 23 (4) Caution Label (J) (at the front of the hinge) and Caution Label (K) (at the front left side of the turn table) Do not stare into laser beam.
In addition, the amount of light exposure (output) is 1 mW or less (about 0.4 mW) at this position. Thus the Models C 12LSH and C 12RSH satisfy the Class II requirements adequately. There is no ill effect on the operator's body if looking at the laser line on the workpiece during operation.
7-6. Precautions Concerning Brake (For USA/CAN) The Models C 12LSH and C 12RSH are equipped with a "brake" that stops running when the switch is turned off. Normally the operation is stopped in 5 - 6 seconds when the switch is turned off. If it takes 10 seconds or more to stop, absolutely avoid further use of this machine.
8. ADJUSTMENT AND OPERATIONAL PRECAUTIONS 8-1. Confirmation of Saw Blade Lower Limit Position The lower limit of the saw blade cutting depth is factory-adjusted so that when the saw blade is fully lowered, its cutting edge is 9 to 11 mm (23/64" to 7/16") below the upper surface of the turn table in order to cut workpieces completely without cutting the bottom of the turn table groove.
8-2. Confirmation for Use of Sub Fence (A) and Sub Fence (B) The Models C 12LSH and C 12RSH are equipped with sub fence (A) and sub fence (B). Use sub fence (A) and sub fence (B) for miter cutting, left and right bevel cutting.
8-3. Position Adjustment of Laser Line The laser line is adjusted to the width of the saw blade at the time of factory shipment. Depending upon the cutting choice, align the laser line with the left side of the cutting width (saw blade) or the right side according to the following procedure.
CAUTION: Laser radiation - Do not stare into beam. Laser radiation on work table. Do not stare into beam. If your eye is exposed directly to the laser beam, it can be hurt. Do not dismantle it. Do not give strong impact to the laser marker (main body of tool); otherwise, the position of a laser line can go out of order, resulting in the damage of the laser marker as well as a shortened service life.
8-5. Adjustment of Table Insert Position Table inserts are installed on the turn table. When the machine is shipped from the factory, the table inserts are positioned so that there is no chance that the saw blade will come in contact with either side of the saw blade slot even if the machine is used for 45˚...
(3) Press cutting ( in Fig. 36) The Models C 12LSH/C 12RSH can be used for press cutting of workpieces up to 107 mm (4-3/16") square in a single operation by simply pushing the saw blade section downward in the same manner as the Model C 12FSA.
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Instruct the customer to always slide the saw blade section toward the fence while cutting, as shown by arrow in Fig. 36. On completion of the cutting operation, turn the switch off and wait for the saw blade to come to a complete stop before raising the handle to its original position.
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Fig. 37 not caused by the performance of the saw blade or the Models C 12LSH/C 12RSH. In the cutting examples illustrated in Fig. 37, the cut surfaces on the sides marked (cut with the grain) are...
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For miter cut setting If the turn table has been set to either of the angles described, move the turn table adjusting side handle a little to the right and left to stabilize the position and to properly align the miter scale and the tip of the indicator before the operation starts.
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Fig. 40 Fig. 41 Fig. 43 Fig. 42 (3) Setting to cut crown moldings at positions in Fig. 39 (See Fig. 44, tilt the head to the right.): Turn the turn table to the right and set the miter angle as follows: For 45˚...
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Fig. 44 Fig. 45 Fig. 46 Fig. 47 Cutting method of crown molding without tilting the saw blade (1) Crown molding stopper (L) and (R) (optional Crown molding vise ass'y Crown molding stopper (R) (optional accessory) (optional accessory) accessories) allow easier cuts of crown molding without 6 mm knob bolt 6 mm knob bolt...
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To ensure that the tip of the 6 mm wing bolt is properly aligned with the desired locking groove on the vise shaft, simply align the upper surface of the fence to either of three v-grooves on the vise shaft surface or to the lower surface of the screw holder.
8-7. Digital Display Panel (Only Model C 12LSH) Fig. 49 Fig. 50-a Fig. 50-b (1) Turning on the digital display switch shows 0˚ for both miter and bevel angle, regardless of main unit angle. (2) Align the main unit angle with the tilt angle (0˚) and miter angle (0˚) and hold down their reset buttons for at least 0.2 seconds.
The laser marker will not light up if the digital display switch is turned off. (Only Model C 12LSH) Do not use the main unit near equipment that generates electrical noise such as generators.
9. ADJUSTMENT OF COMPONENTS 9-1. Bevel Angle Adjustment Before the power tool is shipping from the factory, the height of 8 mm bolt (A), 8 mm bolt (B) and 8 mm set screw is adjusted so that the saw blade section (head) will stop at 0˚ (right angle), 45˚ to the left, and 45˚ to the right. To change the head stop positions, instruct the customer to adjust the height of 8 mm bolt (A), 8 mm bolt (B) and 8 mm set screw by turning them.
(2) Lubrication If it is necessary to replace the ball bushing, apply approximately 2 grams (0.1 oz) of grease (Nippeco SEP 3A) on the steel balls and within the guide grooves of the new ball bushing. If grease is not applied, it will shorten the service life of the ball bushing, and subsequent abrasive contact between the steel balls and slide pipe (B) will cause abnormal noise during slide cutting operations.
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(3) How to install packings (E) and (F) Put the main body mounted with packing (B) and packing (D) in the carton box aligning with the base packing. Cover the support at the rear of the main unit, housing and switch handle with two poly sheets. Insert packing (F) into the clearance near the switch handle at the front of the main unit and packing (E) into the clearance near the support at the rear of the main unit from above.
[Bold] numbers in the descriptions below correspond to the item numbers in the parts list and exploded assembly diagram of the Model C 12LSH. For the Model C 12RSH, refer to the parts list separately. * Be sure to first disconnect the power plug when performing disassembly or replacement of the saw blade.
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Item Disassembly Disassembly procedure Necessary tools spots (1) Remove the Knob Bolt [172], Guard Ass'y [176] and Guard Holder Turn table, base ass'y [178] from Holder (A) [145]. (2) Remove the two Flat Hd. Screws M6 x 25 [53] by turning the Nylon 10 mm wrench Nut M6 [47] with a 10-mm wrench.
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Item Disassembly Disassembly procedure Necessary tools spots Turn table, base NOTE: Do not lose Spring (C) [15] as Spring (C) [15] pops out ass'y when removing the Encoder [16]. When reinstalling the Encoder [16] to the Turn Table [26], move the Encoder [16] away from Gear (A) [8] and secure it at this position with the Machine Screw M5 x 20 [13] temporarily.
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Item Disassembly Disassembly procedure Necessary tools spots Turn table, base (23) Remove the Machine Screw M4 x 8 [34] and remove Spring (E) ass'y [27], Stopper (A) [28] and Pin Cover [32] from the Turn Table [26]. (24) Remove the Machine Screw M4 x 8 [34] and pull out the Lever Shaft [85] to remove the Lever [89], Spring (D) [90] and Shaft (C) [88] from the Turn Table [26].
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Disassembly Item Disassembly procedure Necessary tools spots Protective cover, link Fig. 59 (1) Remove the two Machine Screws (W/Washers) M5 x 12 (Black) [264] and remove the Spindle Cover [265] from the Gear Case Phillips screwdriver [275]. (2) Remove Bolt (A) M10 [284] with the Box Wrench 17mm [501]. Remove the Washer (B) [285], TCT Saw Blade [286] and Washer 17-mm box wrench...
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Item Disassembly Disassembly procedure Necessary tools spots Phillips (1) Remove the Machine Screw M4 x 12 [276] and remove the Nylon Gear case, screwdriver spring, support, Clip [278] from the Gear Case [275] (head). hinge (A), ball 4-mm hex. bar (2) Remove the Seal Lock Hex.
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Item Disassembly Disassembly procedure Necessary tools spots Phillips (8) Remove the Machine Screw M4 x 8 [141]. Lightly tap the end Gear case, screwdriver spring, support, surface of Hinge (A) [173] with a plastic hammer to remove the hinge (A), ball Ball Bushing [144].
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Disassembly Item Disassembly procedure Necessary tools spots Belt, pinion ass'y, spindle ass'y Fig. 61 Phillips (1) Remove the four Machine Screws (W/Washers) M5 x 25 (Black) screwdriver [242] and remove the Pulley Cover [317] from the Gear Case [275]. (2) Pull the Belt (200H13) 16 x 508 [310] outward and turn it to remove from Pulley (A) [307] and Pulley (B) [305].
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Disassembly Item Disassembly procedure Necessary tools spots Monitor, stator ass'y, armature ass'y, pulley (A), switch, laser marker Fig. 62 Phillips (1) Remove the three Tapping Screws (W/Flange) D4 x 20 (Black) screwdriver [241] and the Machine Screw (W/Washers) M5 x 10 [262] to remove Switch Handle (R) [269] and Switch Handle (L) [263] from the Gear Case [275].
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Item Disassembly Disassembly procedure Necessary tools spots Nippers (4) Cut the internal wires at the root of the three Connectors 50092 Monitor, stator ass'y, armature [267] that crimp the internal wire coming from the Stator Ass'y 120V ass'y, pulley (A), [253] and the internal wire at the root of one Connector 50092 switch, laser [267] that crimps the Cord [235] and Internal Wire (A) [266].
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Item Disassembly Disassembly procedure Necessary tools spots Monitor, stator (13) Removal of the Switch (3P Faston Type) W/O Lock [268]: ass'y, armature (a) Remove Switch Handle (R) [269] and Switch Handle (L) [263] from ass'y, pulley (A), the Gear Case [275] according to the procedure of Item No. 5-(1). switch Then the Switch (3P Faston Type) W/O Lock [268] can be removed.
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Disassembly Item Disassembly procedure Necessary tools spots Vise ass'y Phillips (1) Remove the Wing Bolt [38] to remove the screwdriver Vise Shaft [44]. (2) Remove the Machine Screw (W/Washers) M5 x 12 (Black) [43] to remove the Vise Plate [42] and the Washers [41]. (3) Remove the Knob Bolt M10 [39] from the Screw Holder [40].
(3) When replacing or reassembling the Liner [98], ensure it is positioned and assembled as illustrated in Fig. 65. In addition, coat 8 grams of Hitachi Motor Grease on the liner sliding portion of the Turn Table [26]. Fig. 65 (4) When replacing the Laser Marker [198], screw the two Seal Lock Hex.
WARNING: Be sure to turn off the two switches (w/cover) on the top of the Monitor [260] (Model C 12LSH), or turn off the switch (w/cover) on the side of Handle (R) [238] (Model C 12RSH) and unplug the power cord plug from the receptacle before replacing the Laser Marker [198] and the Switching Power Supply [233].
11-5. Checking of Insulation Distance Do not remove too much of the insulation coating at the internal wire connection. Take care not to let the core of the internal wire stick out the Connector 50092 [267] or let the internal wires get caught in a joint between Switch Handle (R) [269] and Switch Handle (L) [263].
(3) Reassembly of the ball bushing The Ball Bushing [144], Holder (A) [145] and Hinge (A) [173] are maintained at a smooth fit. When placing the Ball Bushing [144] into Holder (A) [145] and Hinge (A) [173] gently hammer it with a plastic hammer so that the Ball Bushing [144] is seated into Holder (A) [145] and Hinge (A) [173] in parallel.
11-10. Adjustment of Laser Marker Accuracy (1) Construction of laser marker and functions of each component The Adjuster [191] located at the side of Hinge (A) [173] is a screw used for moving the Laser Marker [198] horizontally. The laser line can be aligned with the left side of the cutting width (saw blade) or the ink line on the right side by means of the Adjuster [191].
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Adjustment of squareness with the fence surface Adjustment of squareness with the base surface Fig. 75-b Fig. 75-c The laser line inclines to the right by turning the Seal The laser line inclines to the left by turning the Seal Lock Hex.
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Next, insert a 2.5-mm hex. bar wrench into the inlet and adjust the two Seal Lock Hex. Socket Set Screws M5 x 6 [200] so that laser beam is applied to the entire cutting surface. (Before adjustment of the Laser Marker [198] using a 2.5-mm hex.
12. REPAIR GUIDE Factory Item Phenomenon Cause (s) Inspection, repair or adjustment standard a Inaccurate 0.15/100 • Readjust squareness with the Inaccurate cutting squareness between (Dummy disc) Nylock Hex. Socket Set Inaccurate • • • the turn table and the (Fig.
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Factory Item Phenomenon Inspection, repair or adjustment Cause (s) standard • Adjust the clearance between Holder (A) the Bushing [143] and slide Slide pipe (A) pipe (A) [149] with the Seal Lock Hex. Socket Set Screw M6 x 10 [148]. Ensure that slide pipe section slides smoothly with a slide load of within 3 kgf.
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Factory Item Phenomenon Inspection, repair or adjustment Cause (s) standard a Large deflection of • Same as Item 1- b . Rough cut surface 0.2/ φ 295 saw blade. Parallelism = 0.02/54 (Dummy disc) (Causes rough cut surface.) Slide load should b Poor movement of •...
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Excessive cutting force • Resharpen saw blade. ------ is applied due to dull saw blade. d Incorrect saw blade is • Use a suitable Hitachi supplied ------ used. saw blade. • An increased number of teeth on the saw blade increases the cutting resistance.
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Switch failure • Check the laser switch ------ (w/cover) on the top of the Monitor [260] for conductivity. (Model C 12LSH) • Replace the Monitor [260]. (Model C 12LSH) • Check the Laser Switch (W/Cover) [319] on the side of Handle (R) [238] for conductivity.
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Digital display does a Improper wiring in the • Check the wiring. not indicate anything. monitor, break in the • Replace Monitor [260]. (Only Model C 12LSH) internal wiring, monitor failure, or controller failure ------ b Switching power • Check the Switching Power...