Bosch Power Tools 3725DEVS manual Assembly, Backing PAD Installation, Abrasive Disc Backing PAD

BM 2609932842 03-12_BM 2609932842 03-12.qxp 3/12/12 9:21 AM Page 8

Assembly

BACKING PAD INSTALLATION

The random orbit sander is equipped with a backing pad of soft hardness, which is suitable for general service. Hard and extra-soft pads are available for other purposes, and in general are used as follows;

Extra soft pad - Polishing or sanding large or curved surfaces.

Soft pad - All purpose general sanding and polishing.

Hard pad - Heavy sanding on flat surfaces, especially with coarser abrasives.

To change backing pad, hold pad firmly and remove the screw using a 5 mm hex wrench that secures the backing pad and remove old pad. Align new pad over drive gear on drive spindle. Attention: always be sure the teeth on the drive gear engage into the openings on the backing pad. Replace screw and securely tighten. Damaged or worn backing pads must be replaced immediately (Fig. 2).

FIG. 2 BACKING

SCREW PAD

DRIVE

GEAR

INSTALLING ACCESSORIES

The random orbit sander uses hook-and-loop backed accessories, which firmly grip the pad when applied with moderate pressure. To change the accessory, merely peel off the old accessory, remove dust from the pad if necessary, and press the new accessory in place. Be sure to align the sanding disc holes with the holes in the backing pad to allow the dust extraction system to function (Fig. 3).

ABRASIVE	FIG. 3
DISC
A

BACKING

PAD

After considerable service the pad surface will become worn, and the pad must be replaced when it no longer offers a firm grip. If you are experiencing premature wearout of the pad facing, decrease the amount of pressure you are applying during operation of the tool.

FRONT HANDLE

Your sander is equipped with a removable front handle when sanding in tight quarters. To remove handle, remove screw with allen wrench. Always reinstall handle for normal operation. Depending on the task, you may

grip the rear handle alone, the rear handle and the front handle, or the rear handle and the top of the ergonomically contoured soft grip motor housing, which is designed for that purpose (Fig. 1).

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