Delta 6″ Edge Sander 31-390 31-391 Owners Instruction Service & Parts Manual

Description

Number of Pages: 21

A dependable shop reference for anyone who owns or works on a Delta Model 31-390 6″ Edge Sander. This quality reproduction combines the original factory instructions with the illustrated parts breakdown in one convenient manual. The pages have been carefully cleaned and prepared for easy use at the workbench.

What’s in this manual:

• Auxiliary Abrasive Drum & Spindle Assembly — Standard equipment on this machine, with assembly instructions for finish-sanding small contoured workpieces, including mounting the drum assembly to the drive pulley.
• Auxiliary End Table — Assembly and positioning of the auxiliary end table, supplied as standard equipment. Adjusts vertically and horizontally to support contour sanding around the drive pulley and auxiliary abrasive drum spindles.
• Single-Phase & Three-Phase Installation — Wiring the motor and starter box for either single-phase or three-phase service.
• Changing Sanding Belts, Abrasive Sleeves, Graphite Pads & Drum Spindles — Four separate maintenance procedures: releasing belt tension to change the belt, loosening the spindle nut to replace abrasive sleeves, replacing the stapled graphite pads, and exchanging drum spindles at the adapter plate.
• Adjusting Belt Tracking & Pulley Alignment — Checking belt tracking by jogging the machine and correcting it with the tracking knob, plus truing the motor pulley when the belt runs high or low.
• Adjusting Long & Short Platen, Tilting Table — Setting the long platen for the straight table, adjusting the short platen for the tilting table, and setting the table angle for bevel edge sanding. Includes adjusting table position and straight-table height.
• Exploded Views & Replacement Parts Lists — The parts diagrams explicitly cover Delta models 31-390 and 31-391.

Overview:

A clean manual is essential for dialing in your machine, but hard to find. Unlike low-resolution free PDF downloads, we professionally digitally restore every page—erasing stains, hole punches, tears, and handwriting. While constrained by the factory original, we maximize clarity so our manuals often look better than new. Printed on quality white paper and comb-bound to lay completely flat at the machine, we deliver a durable, vital tool backed by 30 years of shop expertise.