Grain Systems PNEG-526 - Manual (Page 151)

Disassembly
Reducers to provide
maximum ease when disassembing and reassembling;
they require no special maintenance skills.
Remove the complete SM-CYCLO' Reducer with
adaptor (motorized type) from the driven machine.
2. Remove the plug at the bottom of the oil gauge to
drain all oil from the unit.
3. Remove the cooling fan cover and fan from those
Speed Reducers (not motorized) equipped with a
cooling fan, and stand the unit on a solid base with its
high speed shaft side down. Remove the through bolts
for the high speed end shield, ring gear housing, and
lift the slow speed side, thus separating the unit into
two parts so that the inner mechanism can be removed
(Figs. A-12
-
Note: If the reducer is motorized (C-adaptor and
coupling) remove the motor and coupling before
following the procedure outlined above. As a final step,
remove the adaptor and cooling fan.
4. If the unit will not separate easily, gently drive a
wedge at the line
X shown in Fig. on page A-3 (if
this produces a burr, be sure to remove it before
reassembly).
5. To lift the slow speed side, attach an eyebolt to the
tapped hole on the end of the slow speed shaft and
use a hoist or chain block (Fig. A-12).
6. Take out the slow speed shaft rollers, item 1-06,
page A-3 (Fig. A-13). Check the slow speed shaft pins
(1-01) to see whether any rollers have adhered to
them.
7. Using both hands, lift out the top cycioid disc (2-04)
on the slow speed side (Fig. A-14).
Assembly
Reducers are reassembled by reversing
the disassembly procedure. Care must be taken to
exclude dust or foreign matter from the moving parts,
and to see tnat aaskets are to make the
. .
assembly oil-tight.
Following are some helpful points to remember when
assembling SM-CYCLO" Reducers.
1. Set the ring gear housing and the ring gear
pins and rollers; then test-rotate the pins and rollers by
hand. (Apply grease liberally to the ring gear pins and
rollers before they are inserted in grease lubricated
Reducers.)
2. Cycloid discs are a matched pair. Each carries the
same number stamped on one side of the disc.
3. Set the cycloid disc with the stamped number face up
as shown in Fig. A-17.
8. Remove the spacer ring (2-05).
9. The eccentric (3-04) can be removed from the
input shaft (3-01) after taking out the retaining ring
(3-10) and the inner bearing raceway (Figs. A-15,
A-16).
Note: In certain sizes, the eccentric bearings are
roller bearings without a retainer. Remove bearings of
the top disc before proceeding with the next step.
10. Take out the second disc located on the motor
side. (Also remove second disc bearings and
eccentric with inner bearing raceway if required.)
Remove the ring gear housing (2-01).
12. Follow these steps to remove the slow speed
shaft (1-01) with its bearings from the casing (26): (a)
Remove the horizontal oil seal housing (25). (b) With
a wooden or hard rubber mallet, rap the inner end of
the slow speed shaft to expose the retaining ring*
from the outer raceway of the bearing. (c) Remove
the retaining rina. the outer end of the slow
speed a wooden or hard rubber mallet, and
remove it from the casing.
13. The high speed shaft (3-01) with bearings is
removed from the high speed shaft end shield (8) by
tapping the shaft end after first taking off the retaining
ring (3-1
14. The cvcloid disc is made from heat-treated
bearing
and the spacer ring is cast iron. Take
care not to strike them together while handling.
The above instructions cover complete disassembly.
In ordinary cases, however, only the removal of the
cycloid discs and the eccentric, and removal of the
slow speed shaft from the slow speed end cap is
necessary.
*Note: Retaining ring is part of bearing A
(Part No. 1-02).
4. lnsert the spacer (3-07) and then insert the
by a wooden or
hard rubber mallet (Fig. A-16).
5. lnsert the other spacer and the inner bearing
raceway. Secure them with the retaining ring
(Fig. A-15).
6. Set the spacer ring in place.
7. lnsert top disc in such a way that the mark is
180" opposed to the mark on the bottom disc
(Fig. 3).
8. lnsert slow speed shaft rollers (Fig. A-13).
9. Put the slow speed shaft pins into the rollers (Fig.
A-12). The above instructions are for eccentric
bearings with retainer. Following are the instructions
suggested for roller bearings without retainer.
a. First insert the eccentric with inner raceways of
bearings by rapping with a wooden or hard rubber
mallet.