27
Adjusting Chain Tension
Occasionally the drive chain located under the bowl may need
adjustment. The drive chain must be tight enough so that it does
not whip, vibrate or jump over the sprocket teeth.
To ensure smooth operation, chain tension should be set to
1
/
4
" (6
mm) slack. Measure this by gently pulling the chain in one direction
midway between spindle sprocket and friction clutch sprocket.
Step 1ÑTurn Off Power.
Turn off power and remove feeder
cover.
Step 2ÑLoosen Drive.
Loosen the mounting bolts of the drive
motor.
Step 3ÑAdjust Tension.
Adjust tension of the drive chain by
sliding the motor away from the center of the feeder until the
proper tension is achieved.
Step 4ÑTighten Drive.
Tighten the motor mounting bolts. Replace
all safety covers and check your work.
Adjusting Backup Ring Clearance
A number of design improvements were made to all models (cold
rolled and stainless steel, ANSI and metric) of the FR-20 and FR-30
that affect the backup ring clearance adjustment of the units listed
below.
If FR serial no. is
lower
than shown below, follow OLDER STYLE
Backup Ring Clearance Adjustment Procedure below. If FR serial
no. is
equal to or higher
than shown below, follow CURRENT
STYLE Backup Ring Clearance Adjustment Procedure on the next
page.
Chain Okay:
(top view, not to scale)
Chain Too Loose:
(will whip and vibrate)
Graphic © 1986 HCCI.
Used by permission.
Chain Too Tight:
(requires extra power)
Figure 5-2. Chain
Tension
Chapter 5 Repair & Troubleshooting
