Ohaus DEFENDER D500M MECHANICAL BENCH SCALE Manual - Manual (Page 6)

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MODEL D500M PORTABLE BEAM SCALE ASSEMBLY MANUAL AND OPERATING INSTRUCTIONS
III. ASSEMBLY / INSTALLATION
(NOTE: Refer to the exploded view diagram, Figure 2, for assembly assistance).
A. Each D500M carton contains five individually packed items. These items are:
1. One scale base.
2. One fog white column, consisting of one foursided column piece, and one steelyard rod.
3. One charcoal black beam shelf.
4. One silver-colored gratuated beam assembly. It is packed inside of the white fog column (item2).
5. One box of loose parts containing (in order of assembly):
a. four wheels.
b. four 1/2" axle bolts, each with one 3/8" nut and two washers, for the wheels.
c. two lock washers and two 3/8" nuts, to tighten the column to the colum support plate.
d. one hook, to be hung on the steelyard rod.
e. four 1/4" hex head screws and four flat washers, to tighten the beam shelf to the column.
f. one triangular load box assembly.
g. one set of counterpoise weights as described in Section II of this manual (two sets of weights, on combination lb/kg
versions).
h. two screw # 10-32 x 3/8.
B. for easy assembly the following tools are recommended:
a. 3/4" socket and ratchet
b. 3/4" open end wrench
c. 7/8" open end wrench
d. 9/16" open end wrench
e. 9/16" deep socket and ratchet
f. 1/4" slotted screwdriver
g. 7/16" socket, box, or open end wrench
C. Following the steps below, assemble your D500M:
1. Remove the plastic wrapping from the scale base.
2. Remove the scale platform from the scale base and set it aside.
3. For reinstallation purppose, note the location of the level bubble (item H, figure 2) on the spider assembly. Also note
the position of the two bolts in the center front and center back of the spider assembly. Lift out the spider assembly
and place it off to the side
4. Remove any cardboard packing and bag of silica gel from inside the scale base.
5. Install each wheel in the following sequence:
a. Slide one flat washer onto the 1/2" axle bolt and slide the bolt through the black phenolic wheel.
b. Slide another flat washer onto the bolt.
c. Lifting the scale base the required distance (appoximately 2-1/2"), insert the bolt through the hole in the scale base
from the outside and screw the bolt through the nut that is welded to the inside of the scale base. Allow sufficient
clearance for the wheel to tum freely.
d. From the inside of the scale base, add the nut onto the bolt.
e. Repeat these steps for the remaining three wheels.
f. Tighten all bolts and nuts for the wheel at this time.
6. Remove the packing around fog white column. Remove also the steelyard rod and the beam assembly from the inside
of the column. Place the column piece onto the column support plate. Ohaus Label on the column must be facing
the scale platform. From underneath the column support plate, install a lock washer and 3/8" nut onto the column roads
and tighten.
Holes For Column Rods
Figure 3
Column
Support
Plate
Column Rod Column Rod
Figure 4
Lock Washer
Nut 9/16"