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Hitachi NR 1890DR - User Manual

Hitachi NR 1890DR
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PRODUCT NAME
Hitachi 18 V Cordless Strip Nailer
Models NR 1890DC NR 1890DBCL
NR 1890DR NR 1890DBRL
TROUBLESHOOTING GUIDE --------------------------------------------------------------------------------------- 1
1. Troubleshooting and corrective action --------------------------------------------------------------- 1
2. Corrective action when the orange LED blinks ---------------------------------------------------- 6
3. Maintenance mode --------------------------------------------------------------------------------------- 7
4. Resetting error mode (when the orange LED is blinking) --------------------------------------- 7
REPAIR GUIDE ---------------------------------------------------------------------------------------------------------- 8
1. Precautions on disassembly and reassembly ------------------------------------------------------ 8
• Preparation before disassembly --------------------------------------------------------------------- 8
• Disassembly and reassembly of the magazine section ---------------------------------------- 9
• Disassembly and reassembly of the output section ------------------------------------------ 12
• Replacement of the piston ass'y -------------------------------------------------------------------- 23
• Replacement of sensor (B) --------------------------------------------------------------------------- 26
• Feeding compressed air ----------------------------------------------------------------------------- 27
• Checking after reassembly ------------------------------------------------------------------------- 29
• Tightening torque ------------------------------------------------------------------------------------- 30
• Connecting diagram ---------------------------------------------------------------------------------- 31
STANDARD REPAIR TIME (UNIT) SCHEDULES ------------------------------------------------------------- 32
CONTENTS
CONFIDENTIAL
NR 1890DC: K858
NR 1890DBCL:
NR 1890DR: K859
NR 1890DBRL:
Jul. 2017
NR 1890DR
NR 1890DC
N
Page
Overseas Sales Division

Table of Contents

Other manuals for Hitachi NR 1890DR

Preview: Instruction And Safety Manual
Instruction And Safety Manual92 pages

Questions and Answers

  • B
    Bruce PerezAug 21, 2025
    Why is my Hitachi NR 1890DR Nail Gun not driving nails in all the way?
    • J
      Jessica SalazarAug 21, 2025
      If your Hitachi Nail Gun is not driving nails completely into the workpiece, preventing the heads from being flush, several factors could be responsible. First, ensure that there is adequate compressed air and no leaks; supply compressed air and replace the sealing parts if necessary. Also, make sure the adjuster is set properly. Weak thrusting force against the wood, insufficient grease on the cylinder and piston, or using the nailer on hard wood can also cause this issue. Try following the nailer operation guide and replenishing grease. Other potential causes include a worn-out piston tip or rack, or a deformed output section, all of which may require replacing defective parts.
  • S
    shawn06Aug 25, 2025
    What does it mean when the red LED is blinking on my Hitachi NR 1890DR?
    • T
      tracymedinaAug 25, 2025
      If your Hitachi Nail Gun shows a red LED blinking and no nailing operation, this could be due to low battery voltage. Try charging or replacing the battery.
  • M
    mhaynesAug 28, 2025
    Why is my Hitachi Nail Gun not working and there's no motor sound?
    • K
      Kyle BlackburnAug 28, 2025
      If your Hitachi Nail Gun isn't operating and there's no motor rotation sound, it might be due to the dry-fire lockout mechanism being activated. Try loading nails. Also, wire-related trouble of wiring, switch cable (A), and sensor (B) can be the cause. Resolder the disconnected wires or replace defective parts.
  • T
    Trevor BakerAug 31, 2025
    What does it mean when the two red LEDs are blinking on my Hitachi Nail Gun?
    • S
      sgarciaAug 31, 2025
      If your Hitachi Nail Gun shows two red LEDs blinking and there's no nailing operation, the overheat or overcool protector might be activated. Try cooling or warming the nailer body and check the nailing work.
  • P
    paularamirezSep 3, 2025
    Why are the nails bending when using my Hitachi NR 1890DR?
    • J
      Jennifer MartinSep 4, 2025
      If your Hitachi Nail Gun is driving nails that are bending, it could be due to a few reasons. First, make sure you are using the specified nails and that they are correctly fed into the injection port, removing any abnormal nails. Also, avoid using the nailer on wood that is too hard. Other potential causes include a worn-out piston tip or blade rack, or a deformed output section, all of which may require replacing defective parts.
  • M
    michael58Sep 7, 2025
    Why does my Hitachi NR 1890DR start nailing with a single trigger?
    • A
      Alan StewartSep 7, 2025
      If your Hitachi Nail Gun starts nailing with a single trigger, it could be due to malfunction caused by unwanted objects near pushing lever (A), (B) or blade guide (A) or by deformation of the lever or blade guide. Clean the pushing lever and the blade guide, then apply oil to them. Also, broken or worn-out pushing lever spring (B) can be the cause. Replace defective parts.
  • R
    Ronald GonzalezSep 12, 2025
    What does it mean when the orange LED is blinking on my Hitachi NR 1890DR Nail Gun?
    • A
      Allison ClementsSep 12, 2025
      If your Hitachi Nail Gun shows an orange LED blinking and no nailing operation, it could be due to broken movable part that disabled nailing work, disconnected wiring and stator, power transmission failure due to broken gears, sensor (C) trouble, or excessively charged compressed air. Replace defective parts. If the issue is excessively charged compressed air, move the piston down to the bottom dead point, discharge the compressed air, and use the reduction valve set to feed compressed air again.
  • A
    Angela LeeNov 13, 2025
    Why won't my Hitachi NR 1890DR drive nails?
    • P
      Peter RuizNov 14, 2025
      If your Hitachi Nail Gun isn't driving nails, it could be due to several reasons. First, ensure you are using the specified Hitachi genuine nails and that the magazine is loaded correctly, removing any abnormal nails. The absence of compressed air or a leak could also be the cause; ensure you supply compressed air, and if there's a leak, disassemble the nailer to clean the chamber and piston, replacing any faulty sealing parts. Also, check for any unwanted objects like dust or wood in the nail guide groove and remove them. Finally, make sure the bolts of the output and magazine sections are tightened to the correct torque. Other potential causes include a worn-out piston tip, piston trouble, nail feeder trouble, or a worn-out nail rail or magazine plate, all of which may require replacing ...
  • P
    Patricia WashingtonNov 17, 2025
    What to do if my Hitachi NR 1890DR keeps jamming?
    • J
      Jennifer RamseyNov 17, 2025
      If your Hitachi Nail Gun is experiencing nail jams, several factors could be the cause. First, ensure you're using the specified nails and that they are loaded correctly, removing any bent or abnormal nails. Also, check for obstructions such as dust, wood, or adhesives in the nail guide groove of the magazine and nail feeder and remove them. Furthermore, misaligned assembly of blade guide and magazine, loose bolts of the output and magazine sections, or a deformed output section can lead to jams. In such cases, reassemble the blade guide or tighten the bolts to the specified torque, or replace defective parts. Other potential causes include a worn-out piston tip, piston slide surface trouble, nail feeder trouble, or issues with the nail guide groove, all of which may require replacing defe...

Summary

Troubleshooting Guide

1. Troubleshooting and Corrective Action

Lists common problems encountered with the nailer and their corresponding corrective actions.

2. Corrective Action for Orange LED Blinking

Details the corrective actions based on specific orange LED blinking patterns and possible causes.

3. Maintenance Mode

Explains how to set the maintenance mode for moving the piston to the bottom dead point.

4. Resetting Error Mode

Provides instructions on how to reset the error mode indicated by blinking orange LEDs.

Repair Guide

1. Precautions on Disassembly and Reassembly

Covers essential safety warnings and preparation steps before tool disassembly.

Magazine Section Disassembly and Reassembly

Step-by-step instructions for disassembling and reassembling the tool's magazine section.

2. Reassembly Notes

Provides specific points and notes for reassembling the magazine section.

Output Section Disassembly and Reassembly

Detailed guide for disassembling and reassembling the tool's output section.

Piston Assembly Replacement

Procedure for replacing the piston assembly, including necessary parts.

Sensor (B) Replacement Guide

Instructions for removing and installing sensor (B) on the tool.

Feeding Compressed Air Procedure

Guide on the correct method for feeding compressed air to the nailer.

Post-Reassembly Checks

Procedures to verify tool functionality and operation after reassembly.

Tightening Torque Specifications

Lists specified torque values for various fasteners during assembly and repair.

Electrical Connecting Diagram

Diagram illustrating the electrical connections between internal components.

Standard Repair Time Schedules

Hitachi NR 1890DR Specifications

General IconGeneral
Power SourceBattery
Battery Voltage18V
Weight10.8 lbs
TypeCordless Framing Nailer
Depth AdjustmentYes
No-Mar TipYes
Tool-Free Jam ReleaseYes
Nail Diameter0.113 inch to 0.131 inch
Magazine Capacity85 Nails
Firing ModeSequential
Fastener TypeNails

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