Owners Manual • Rexnord
®
Planetgear
™
7000 Speed Reducers
(Page 23 of 33)
Size Mercury/Mars
158-110
10/21 (Supersedes 01/15)
© Rexnord Corporation. All Rights Reserved.
NOTE
: Use a dial indicator that has a balanced dial with
0.0001" or 0.01mm graduations.
5. Affix the magnetic base of the dial indicator to a flat
area of the housing (reference
Figure 6.4.1
).
6. Place the stem of the dial indicator perpendicular to the
end of the shaft.
NOTE
: Place stem of dial indicator as close to the center
of the shaft as possible.
7. Record the reading of the dial indicator when the
indicator has engaged the shaft.
8. With a pry bar, push the inboard end of the shaft up
(reference
Figure 6.4.1
).
NOTE
: Use a constant swift force when pushing on the pry
bar. Excessive force not required. DO NOT rotate
shaft while pushing on shaft. The object is to lift the
shaft only.
9. Record reading of the dial indicator. Take the difference
between the two readings. The difference is the axial
bearing clearance.
NOTE
: 0.001" to 0.004" (0.03 to 0.10 mm) axial bearing
clearance is recommended. Do steps 3 thru 9
several times to insure an accurate measurement
has been made.
10. See
Sections 6.4.2 and 6.4.3
for adjusting for too
much or too little axial bearing clearance.
6.4.2 ADJUSTING FOR TOO MUCH AXIAL
BEARING CLEARANCE
NOTE
: If axial bearing clearance is too excessive, it might
be necessary to remove the locknut and spacer
and press the inboard bearing again. Reference
Section 6.3.5
- steps 11 to 18.
1. Loosen set screw on locknut.
2. Mark the position of the locknut.
3. Rotate locknut 1/16" to 1/8" (1.5 to 3.0 mm) in the
clockwise direction from mark to tighten locknut.
NOTE
: The measurement given is an estimate.
4. Tighten set screw on locknut.
5. Follow procedures in
Section 6.4.1
to determine new
axial bearing clearance.
6. Repeat first 5 steps if axial bearing clearance is found
to be still too much.
6.4.3 ADJUSTING FOR TOO LITTLE AXIAL
BEARING CLEARANCE
1. Loosen set screw on locknut.
2. Mark the position of the locknut.
3. Rotate locknut 1/16" to 1/8" (1.5 to 3.0 mm) in the
counter clockwise direction from mark to loosen locknut.
NOTE
: The measurement given is an estimate.
4. Tighten set screw on locknut.
5. Hold housing on its side and with a blunt instrument,
rap on inboard side of shaft. Reference
Page 21.
6. Follow procedures in
Section 6.4.1
to determine new
axial bearing clearance.
7. Repeat first 6 steps if axial bearing clearance is found
still to be too little.
6.5 GEAR TRAIN DISASSEMBLY
Place gears in a clean dry place in the order of
disassembly. Exploded view drawings of a specific gear
train may be requested from the factory by specifying
the reducer serial number, model number, size, ratio, and
rating. To order replacement components, please give the
previously stated information about the reducer and the
items needed. Reference the following sketches for general
exploded view drawings.
NOTE
: It is recommended that the input assembly be
removed first, then the gear train, and finally the
output assembly.
z
Single Reduction disassembly - Remove input assembly
(1) from maincase (4). Remove input gear (2), and last
stage carrier (3). Remove output assembly (5) from
maincase.
SINGLE REDUCTION
z
Double Reduction disassembly - Remove input assembly
(1) from maincase (6). Remove input gear (2), first stage
carrier (3), last stage sun gear (4), and last stage carrier
(5). Remove output assembly (7) from maincase.
DOUBLE REDUCTION
z
Triple Reduction disassembly - Remove input assembly
(1) from maincase (8). Remove input gear (2), first stage
carrier (3), second stage sun gear (4), second stage
carrier (5), last stage sun gear (6), and last stage carrier
(7). Remove output assembly (9) from maincase.
TRIPLE REDUCTION
