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Hitachi C 7UR Service Manual

184 mm (7-1/4”) circular saw, 185 mm (7-1/4”) circular saw
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PRODUCT NAME
Hitachi 184 mm (7-1/4") Circular Saw
C 7UR, C 7BUR
Models
Hitachi 185 mm (7-1/4") Circular Saw
C 7UR
Model
CONTENTS
REPAIR GUIDE ---------------------------------------------------------------------------------------------------------------- 1
1. Precautions on disassembly and reassembly ----------------------------------------------------------- 1
• Disassembly ------------------------------------------------------------------------------------------------------ 1
• Reassembly ------------------------------------------------------------------------------------------------------ 6
• Lubrication points and type of lubricant -------------------------------------------------------------------- 8
• Screw tightening torque --------------------------------------------------------------------------------------- 8
• Checking after reassembly ------------------------------------------------------------------------------------- 9
• Wiring diagram ---------------------------------------------------------------------------------------------------10
STANDARD REPAIR TIME (UNIT) SCHEDULES -------------------------------------------------------------------12
CONFIDENTIAL
Dec. 2017
*For the USA and Canada only
*Except for the USA and Canada
Page
C 7UR
Overseas Sales Division
C

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Summary of Contents for Hitachi C 7UR

  • Page 1: Table Of Contents

    CONFIDENTIAL Dec. 2017 PRODUCT NAME Hitachi 184 mm (7-1/4”) Circular Saw C 7UR, C 7BUR Models *For the USA and Canada only Hitachi 185 mm (7-1/4”) Circular Saw C 7UR Model *Except for the USA and Canada CONTENTS Page REPAIR GUIDE ---------------------------------------------------------------------------------------------------------------- 1 1.

  • Page 2: Repair Guide

    1. Precautions on disassembly and reassembly [Bold] numbers in the description below correspond to the item numbers in the parts list and exploded assembly diagram for the Model C 7UR, and {Bold} numbers correspond to those for the Model C 7BUR. Disassembly CAUTION: Prior to disassembly of the circular saw, remove the TCT Saw Blade [12]{12} to protect the saw blade teeth and yourself.
  • Page 3 2. Removal of the lower guard (1) Remove the two Seal Lock Flat Hd. Screws M4 x 10 [10]{10}, then remove the Bearing Cover [9]{9}. (2) Remove the hook of the Return Spring [7]{7} from the Gear Cover [26]{26} and the Lower Guard [8]{8}, then remove the Lower Guard [8]{8}, Liner [5]{5} and Washer [6]{6}.
  • Page 4 4. Removal of the bearing holder and spindle and gear set (1) After removing the Lower Guard [8]{8} as described above, loosen the two Seal Lock Flat Hd. Screws M5 x 14 [3]{3}. (2) Remove the Bearing Holder [2]{2} together with the Spindle and Gear Set [1]{1} from the Gear Cover [26]{26}.
  • Page 5 6. Disassembly of the motor unit (1) Remove the Brush Caps [45]{42} and take out the Carbon Brushes [44]{41}. (2) Loosen the Machine Screws M5 x 50 [39]{36} and separate the Housing Ass'y [42]{39} from the Gear Cover [26]{26}. If the Armature [22]{22} is remained in the Housing Ass'y [42]{39}, gently tap the Housing Ass'y [42]{39} on the edge of the surface where the Gear Cover [26]{26} is mounted with a wooden or plastic hammer and remove the Armature [22]{22}.
  • Page 6 7. Removal of the base ass’y Extract the Roll Pin D6 x 40 [74]{71} and remove the Base Ass’y [77]{74} from the Housing Ass’y [42]{39}. • Removal of the base ass'y [74]{71} [42]{39} [77]{74} 8. Disassembly of handle (A).(B) set (1) Loosen and remove the six Tapping Screws D4 x 20 [38]{35}.

  • Page 7: Reassembly

    Reassembly Generally, perform reassembly by reversing the disassembly procedure. However, special attention should be given to the following items. Refer to “Lubrication points and type of lubricant” on page 8 for the grease required for reassembly. 1. Reassembly of the power supply unit and its vicinity Perform wiring according to the wiring diagrams shown on pages 10 and 11 when replacing the Stator Ass'y [20]{20}, Cord [55]{52}, Noise Suppressor [35] or the Switch [48]{45}.
  • Page 8 4. Mounting the bearing holder (1) Mount the Bearing Holder [2]{2} to the Gear Cover [26]{26} positioning the protrusion on either left or right side of the Bearing Holder [2]{2} downward. • Mounting the bearing holder The Bearing Holder [2]{2} has a protrusion on either left or right side. Protrusion [26]{26} Position of the protrusion...

  • Page 9: Lubrication Points And Type Of Lubricant

    Lubrication points and type of lubricant Apply specified amount of grease to the following portions. Grease (Nippeco BC-4) • Pinion tooth flank of the Armature [22]{22} ····························································· About 1 g • Gear tooth flank of the Spindle and Gear Set [1]{1} ·················································· About 2 g •...

  • Page 10: Checking After Reassembly

    Checking after reassembly • Check the following after reassembly. (1) Adjust the base ass’y angle to 90°±0.5° with the Slotted Hd. Set Screw (Seal Lock) M6 x 8 [64]{61}. (2) Check that the Base Ass’y [77]{74} operates smoothly. (Adjust the cutting depth and tilt angle.) (3) Check the switch operation.

  • Page 11: Wiring Diagram

    Be sure to connect the wires correctly. If the wires are incorrectly connected, the motor may not turn or other problems could occur. • Connecting and wiring diagrams of the Model C 7UR for the USA, Canada, and Mexico (120 V) Switch...
  • Page 12 • Connecting and wiring diagrams of the Model C 7UR for countries other than the USA, Canada, and Mexico (230 V to 240 V) Switch Stator coil Blue Armature Brown Power source Noise Blue suppressor Blue Stator coil 5±1 Noise suppressor •...

  • Page 13: Standard Repair Time (Unit) Schedules

    STANDARD REPAIR TIME (UNIT) SCHEDULES Variable MODEL 60 min. Work Flow C 7UR C 7BUR Handle Switch (A).(B) Set Cord Cord Armor Housing Ass'y Stator Ass'y General Assembly Lower Guard Armature Return Ball Bearing 6202VV Spring Ball Bearing 6000VV Bearing...
  • Page 14 LIST NO. E544 CIRCULAR SAW 2017 · 10 · 23 Model C 7UR (E1)
  • Page 15 PARTS C 7UR ITEM DESCRIPTION REMARKS CODE NO. CODE NO. USED 372782 SPINDLE AND GEAR SET 372765 BEARING HOLDER 992013 SEAL LOCK FLAT HD. SCREW M5 X 14 6003VV BALL BEARING 6003VVCMPS2L 998887 LINER 370591 WASHER 373026 RETURN SPRING 372758...
  • Page 16 PARTS C 7UR ITEM DESCRIPTION REMARKS CODE NO. USED 938477 HEX. SOCKET SET SCREW M5 X 8 372759 HOUSING ASS'Y INCLUD.41,43 938241 BRUSH HOLDER 999038 CARBON BRUSH (1 PAIR) 945161 BRUSH CAP 370269 CORD HOLDER 311945 TAPPING SCREW (W/FLANGE) D4 X 10 (BLACK)
  • Page 17 STANDARD ACCESSORIES C 7UR ITEM DESCRIPTION REMARKS CODE NO. USED 372784 CASE EXCEPT FOR USA,CAN 302691 GUIDE EXCEPT FOR USA,CAN 872422 HEX. BAR WRENCH 6MM 371108 TOOL BAG FOR USA,CAN LEVER EXCEPT FOR USA,CAN (SUPPLIED WITH ITEM NO.31) - 4 -...
  • Page 18 LIST NO. E543 CIRCULAR SAW 2017 · 10 · 23 Model C 7BUR (E1)
  • Page 19 PARTS C 7BUR ITEM DESCRIPTION REMARKS CODE NO. CODE NO. USED 372782 SPINDLE AND GEAR SET 372765 BEARING HOLDER 992013 SEAL LOCK FLAT HD. SCREW M5 X 14 6003VV BALL BEARING 6003VVCMPS2L 998887 LINER 370591 WASHER 373026 RETURN SPRING 372758 LOWER GUARD 302435 BEARING COVER...
  • Page 20 PARTS C 7BUR ITEM DESCRIPTION REMARKS CODE NO. USED 938051 CORD ARMOR D10.1 500453Z CORD (CORD ARMOR D10.1) 373027 HANDLE (A).(B) SET 372773 LEVER (A) 670514 RETAINING RING (E-TYPE) FOR D10 SHAFT 372772 LOCK NUT 949433 BOLT WASHER M8 (10 PCS.) 372764 BEVEL STAND 372770...

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C 7bur

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