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DOC960OP-99 REV 04/02
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10. Burr King recommends that all three phase installations include a magnetic starter. Magnetic starters
protect motors from “single phasing”, overheating, etc. thereby reducing the risk of damage to the equipment
and/or fire hazard to your facility.
11. Insure that the model 960-250 or 960-400 AC power source is properly sized, and properly fused. You
should consult a competent electrician, or you may call Burr King Manufacturing for guidance.
Functional operating instructions for the model 960-250 or 960-400 belt grinder
The model 960-250 or 960-400 was fully tested and verified to comply with requirements prior to shipping
from the factory. You should perform the following steps:
1. With the machine securely bolted to its table, pedestal, and/or floor point connect the AC power to its
source.
2. Adjust the work support and work support arm (P/N 706, 905 or 906-4, 905-4) to the desired position.
Take care that the gap between the face of the abrasive belt and the work rest is at most 1/8 inch.
3. Insure that the abrasive belt is tensioned properly. To do this, raise the tensioning handle (P/N 937G). You
will hear mechanical clicks as the tensioning ratchet pawl (737F) moves. Generally, the belt will be
adequately tensioned when you hear three to eight clicks. To reduce or release the belt tension slightly raise
the tensioning handle (P/N 737A) then press the button (P/N 737B) in the center of the tensioning handle.
Move the tensioning handle down slightly to reduce belt tension or all the way down to release belt tension.
4. Engage the motor by placing the ON/OFF switch to ON. The belt should rotate smoothly in a CCW
direction about the machine wheel belt path. If either of these conditions are not met turn the machine OFF
immediately.
a. If the abrasive belt does not remain centered on the contact wheel (P/N 802 or 802-4) while the
belt is moving use the tracking adjustment (P/N 921) on the upper left side of the machine to track the belt.
Turning this control CW to cause the belt to track to the right, conversely turn the control CCW to cause the
belt to move to the left.
b. If the belt runs in reverse (up from the floor) you may correct this by changing the main drive
motor rotation direction.
FIRST DISCONNECT THE MACHINE FROM ITS AC POWER SOURCE.
A COMPETENT ELECTRICIAN SHOULD PERFORM ALL ELECTRICAL WORK ON THE
MODEL 960-250 or 960-400.
1) Reversed the motor direction of a three phase motor by reversing any
two legs of the input power lines.
2) Reverse the motor direction of a single phase motor by reversing leads 5 and 8 found
within the metal wiring box located on the motor, or as otherwise instructed on the actual
motor label.
c. If the machine belt tensions, and tracks properly, but has excessive vibration turn the machine OFF
and call the Burr King factory for assistance.
Maintenance for the model 960-250 or 960-400
FIRST DISCONNECT THE MACHINE FROM ITS AC POWER SOURCE.
* Every thirty days apply light machine oil to the rear wheel support (P/N 935) to rear wheel handle (P/N
937G) interface. Two drops of oil is sufficient.
* Every thirty days check the v-belt (P/N 951) tension. If you can hear the belt “slap” the v-belt guard (P/N
928) when the drive motor starts, the v-belt may require re-tensioning. Do this by loosening the two nuts
(P/N 39) that secure the motor to the v-belt guard (P/N 928) and slide the guard forward. Tighten the two
nuts (P/N 39).
* Daily vacuum or otherwise remove dust and debris build-up from the machine and the machine belt track.
* Routinely inspect for loose screws and other hardware. Tighten as required.
There are no other maintenance actions required. All bearings are sealed for life and require no additional
lubrication.
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Remember for operator safety and the continued effectiveness of your model 960-250 or 960-400:
Do not defeat the safety guards and other safety provisions of the model 960-250 or 960-400.