Pump
B 2-21
E 2000 Nordson Corporation
All rights reserved
41-3000
Issued 11/00
B2EN-02-[3-PUMP]-5
Speed Reducer Installation
1. Attach the sprocket and the key to the new speed reducer.
2. The speed reducer replacement kit has two sets of screws. Remove
the screws and nuts from the new reducer and discard them. Insert
the longer screws in the replacement kit in the new speed reducer.
3. Align the spacers on the motor support bracket and position the new
speed reducer on top of the spacers.
4. Place the speed reducer adjusting bracket under the motor support
bracket and tighten the reducer screws finger tight.
5. Install the chain-tensioning screw and nut in the speed reducer
adjusting bracket and motor support bracket.
6. Install the drive chain on the speed reducer sprocket. Tighten the
chain-tensioning screw just enough to keep the chain on both
sprockets.
7. Remove the speed reducer coupling. Apply anti-seize lubricant to
both the speed reducer and motor shafts and place the coupling on
the reducer shaft.
8. Attach the motor to the new speed reducer. Tighten the screws,
washers, and lock washers to 6.78–8.114 NSm (5–6 ft-lb).
9. Adjust the drive chain slack as follows:
a. Adjust the height of the speed reducer sprocket so it is level with
the drive shaft sprocket.
b. With the chain attached to both sprockets and the speed reducer
screws snug but not tightened, adjust the chain-tensioning screw
to obtain the chain-deflection dimensions shown in Figure B 2-8.
c. Begin tightening the speed reducer screws that are closest to the
chain-tensioning screw and check the chain tension. If the chain
becomes too tight, loosen the same screws and turn the
chain-tensioning screw counterclockwise. Move the speed
reducer to decrease the chain tension.
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