Dodge Torque-Arm II TA0107LM User manual

1
Torque-Arm®II Metric Speed Reducers
Instruction Manual
Ratios 5, 9, 15, 25, and 40: 1
These instructions must be read thoroughly before installation or operation. This instruction manual was accurate at the time of
printing. Please see dodgeindustrial.com for updated instruction manuals.
WARNING: To ensure the drive is not unexpectedly started, turn o and
lock-out or tag power source before proceeding. Failure to observe these
precautions could result in bodily injury.
WARNING: Because of the possible danger to person(s) or property
from accidents which may result from the improper use of products,
it is important that correct procedures be followed. Products must be
used in accordance with the engineering information specied in the
catalog. Proper installation, maintenance and operation procedures
must be observed. The instructions in the instruction manuals must
be followed. Inspections should be made as necessary to assure
safe operation under prevailing conditions. Proper guards and other
suitable safety devices or procedures as may be desirable or as may
be specied in safety codes should be provided, and are neither
provided by Dodge nor are the responsibility of Dodge. This unit and
its associated equipment must be installed, adjusted and maintained
by qualied personnel who are familiar with the construction and
operation of all equipment in the system and the potential hazards
involved. When risk to persons or property may be involved, a holding
device must be an integral part of the driven equipment beyond the
speed reducer output shaft.
WARNING: All products over 25 kg (55 lbs) are noted on the shipping
package. Proper lifting practices are required for these products.
Vertical Installations–Install the lter/ventilation plug in the
hole provided in the upper face of the reducer housing as
installed. If space is restricted on the upper face, install the
vent in the highest hole on the side of the reducer per Figure
1. Install a plug in the hole in the bottom face of the reducer.
Do not use this hole for the magnetic drain plug. Of the
remaining holes on the sides of the reducer, use the plug in
the upper housing half for the minimum oil level plug.
Figure 1 - Mounting Positions
WARNING: Torque-Arm II products exceeding 13.5kg (30 lbs) should
be lifted using lift-assist equipment rated for the weight of the product.
Weight values for all Torque-Arm II products are listed in the Gearing
Engineering Catalog. Lifting brackets provided on the Torque-Arm II
should be used when connecting to lift-assist equipment.
WARNING: Depending on operating conditions, sound levels for Torque-
Arm II products may exceed 70 dB. Protective measures such as hearing
protection may be needed when in close proximity to a Torque-Arm II.
INSTALLATION
NOTE: This reducer is compatible with the Dodge®Smart
Sensor that can be installed in the adapter plug labeled
“smart sensor.” The plug and sensor can be moved to
dierent locations as required by mounting position.
1. Use lifting bracket to lift reducer.
2. Determine the running positions of the reducer (see Figure 1).
Note that the reducer is supplied with 6 plugs; 4 around the
sides for horizontal installations and 1 on each face for vertical
installations. These plugs must be arranged relative to the
running positions as follows:
Horizontal Installations–Install the magnetic drain plug in
the hole closest to the bottom of the reducer. Throw away the
tape that covers the lter/ventilation plug in shipment and
install plug in topmost hole. Of the 2 remaining plugs on the
sides of the reducer, the lowest one is the minimum oil level
plug.
HORIZONTAL MOUNTING
POSITION B
POSITION A
POSITION DPOSITION C
POSITION FPOSITION E
5 (NEAR)
6 (FAR)
4 (NEAR)
5 (FAR)
4 (NEAR)
5 (FAR)
5 (NEAR)
6 (FAR)
5 (NEAR)
6 (FAR) 4
2
3
1
1
4
3
2
VERTICAL MOUNTING
2
43
1
1
4
3
2
5 (NEAR)
6 (FAR)
21
5
61
6
5
2

2MN1620
Output Speeds Above 15 RPM
Mounting Position Vent and Plug Locations
1 2 3 4 5 6
Position A Level Plug Drain Vent Plug Plug
Position B Drain Vent Level Plug Plug Plug
Position C Plug Level Vent Drain Plug Plug
Position D Vent Drain Level Plug Plug Plug
Position E Level Plug Plug Drain Vent Plug
Position F Plug Drain Level Plug Plug Vent
Output Speeds 15 RPM and Below*
Mounting Position Vent and Plug Locations
1 2 3 4 5 6
Position A Plug Level Drain Vent Plug Plug
Position B Drain Vent Plug Level Plug Plug
Position C Level Plug Vent Drain Plug Plug
Position D Vent Drain Level Plug Plug Plug
Position E Level Plug Plug Drain Vent Plug
Position F Plug Drain Level Plug Plug Vent
* Below 15 RPM output speed, oil level must be adjusted to
reach the highest oil level plug. If reducer position is to vary
from those shown in Figure 1, either more or less oil may be
required. Consult your Dodge Sales Representative.
The running position of the reducer in a horizontal application
is not limited to the four positions shown in Figure 1. However,
if running position is over 20º in position “B” & “D” or 5º in
position “A” & “C”, either way from sketches, the oil level plug
cannot be used safely to check the oil level, unless during the
checking, the torque arm is disconnected and the reducer
is swung to within 20º for position “A” & “C” or 5º for position
“B” & “D” of the positions shown in Figure 1. Because of the
many possible positions of the reducer vent seepage might
occur and it may be necessary or desirable to make special
adaptations using the lubrication lling holes furnished along
with other standard pipe ttings, stand pipes and oil level
gauges as required.
3. Mount reducer on driven shaft as follows:
For Taper Bushed Reducer: Mount reducer on driven shaft
per instruction in Torque-Arm II Bushing Installation section of
this manual.
4. Install sheave on input shaft as close to reducer as practical
(see Figure 2).
5. If not using a Dodge Torque-Arm II motor mount, install motor
and V-belt drive so belt will approximately be at right angles to
the centerline between driven and input shaft (see Figure 3).
This will permit tightening the V-belt with the torque arm.
6. Install torque arm and adapter plates reusing the reducer
bolts. The adapter plates will t in any position around the
input end reducer.
7. Install torque arm fulcrum on a at and rigid support so that
the torque arm will be approximately at right angles to the
centerline through the driven shaft and the torque arm anchor
screw. (See Figure 4) Make sure that there is sucient take-
up in the turnbuckle for belt tension adjustment when using
V-belt drive.
CAUTION: Unit is shipped without oil. Add proper amount
of recommended lubricant before operating. Failure to
observe this precaution could result in damage to or
destruction of the equipment.
8. Fill gear reducer with recommended lubricant. See Table 2.
TORQUE-ARM II BUSHING INSTALLATION
WARNING: To ensure that drive is not unexpectedly started,
turn o and lock out or tag power source before proceeding.
Remove all external loads from drive before removing or
servicing drive or accessories. Failure to observe these
precautions could result in bodily injury.
The Dodge Torque-Arm II reducer is designed to t both standard
and short length driven shafts. The Standard Taper Bushings
series is designed where shaft length is not a concern. The Short
Shaft Bushing series is to be used where the driven shaft does
not extend through the reducer.
Standard Taper Bushings
1. One bushing assembly is required to mount the reducer
on the driven shaft. An assembly consists of two tapered
bushings, bushing screws and washers, two bushing backup
plates and retaining rings, and necessary shaft key or keys.
The driven shaft must extend through the full length of the
reducer. If the driven shaft does not extend through the
reducer do not use the standard tapered bushings; instead
use the short shaft bushings as described in the Short Shaft
Bushings section that follows. The minimum shaft length, as
measured from the end of the shaft to the outer edge of the
bushing ange (see Figure 5), is given in Table 1.
Figure 2 - Reducer and Sheave Installation
90° OR
MAY VARY 30°
V
-BELT
DRIVE
V-BELT
DRIVE MAY
BE LOCA
TED
TO THE
RIGHT IF
DESIRED
Figure 3 - Angle of V-Drive
90° ANGLE OR
MAY VARY 20° IN
TENSION OR
COMPRESSION
TORQUE-ARM
AND BELT
TAKE-UP
TORQUE
ARM MAY
BE LOCATE
D
TO THE
RIGHT IF
DESIRED
Figure 4 - Angle of Torque-Arm

3MN1620
2. Install one bushing backup plate on the end of the hub and
secure with the supplied retaining ring. Repeat procedure for
other side.
3. Place one bushing, ange end rst, onto the driven shaft and
position per dimension “A”, as shown in Table 1. This will allow
the bolts to be threaded into the bushing for future bushing
and reducer removal.
4. Insert the output key in the shaft and bushing. For easy of
installation, rotate the driven shaft so that the shaft keyseat is
at the top position.
5. Mount the reducer on the driven shaft and align the shaft key
with the reducer hub keyway. Maintain the recommended
minimum distance “A” from the shaft bearing.
6. Insert the screws, with washers installed, in the unthreaded
holes in the bushing ange and align with the threaded holes
in the bushing backup plate. If necessary, rotate the bushing
backup plate to align with the bushing screws. Tighten the
screws lightly. If the reducer must be positioned closer than
dimension “A”, place the screws with washers installed, in the
unthreaded holes in the bushing before positioning reducer
making sure to maintain at least 3.0mm between the screw
heads and the bearing.
7. Place the second tapered bushing in position on the shaft
and align the bushing keyway with the shaft key. Align the
unthreaded holes in the bushing with the threaded holes in
the bushing backup plate. If necessary, rotate the bushing
backup plate to align with the bushing holes. Insert bushing
screws, with washers installed in the unthreaded holes in the
bushing. Tighten screws lightly.
8. Alternately and evenly tighten the screws in the bushing
nearest the equipment to the recommended torque given in
Table 1. Repeat procedure on outer bushing.
Short Shaft Bushings
1. One bushing assembly is required to mount the reducer on
the driven shaft. An assembly consists of one long tapered
bushing, one short tapered bushing, one tapered bushing
wedge, bushing screws and washers, two bushing backup
plates and retaining rings, and necessary shaft key or keys.
The driven shaft does not need to extend through the reducer
for the short shaft bushing to operate properly. The minimum
shaft length, as measured from the end of the shaft to the
outer edge of the bushing ange (see Figure 5), is given in
Table 1.
Table 1–Minimum Mounting Dimensions & Bolt Torques
Minimum Required Shaft Length
Reducer Size Tapered Bore Straight Bore
Standard
Length Shaft
Short Length
Shaft
Two
Collars
One
Collar
TA0107LM 173 110 150 131
TA1107HM 177 113 148 129
TA2115HM 198 122 165 146
TA3203HM 219 139 193 167
TA4207HM 227 144 204 172
TA5215HM 263 162 228 196
TA6307HM 275 171 239 207
TA7315HM 301 194 270 232
TA8407HM 326 206 294 256
TA9415HM 325 217 311 270
TA10507HM 393 246 355 299
TA12608HM 465 295 425 346
Table 1–Minimum Mounting Dimensions & Bolt Torques (Continued)
Bushing Screw Information & Minimum Clearance for Removal
Reducer Size Fastener Size Torque in N.m A
TA0107LM M8 1.25 20-24 30
TA1107HM M8 1.25 20-24 30
TA2115HM M10 1.5 43-48 36
TA3203HM M10 1.5 43-48 36
TA4207HM M10 1.5 43-48 36
TA5215HM M12 1.75 80-85 48
TA6307HM M12 1.75 80-85 48
TA7315HM M12 1.75 80-85 53
TA8407HM M12 1.75 80-85 53
TA9415HM M16 2 110-125 60
TA10507HM M16 2 110-125 60
TA12608HM M16 2 110-125 60
2. The long bushing is designed to be installed from the side of
the reducer opposite the driven equipment as shown in Figure
6. The long bushing when properly installed is designed to
capture the end of the customer shaft that does not extend
through the reducer. Normally the reducer would be mounted
such that the input shaft extends from the side of the reducer
opposite the driven equipment however the reducer design
allows installation of the reducer to be mounted in the
opposite direction.
3. Install the tapered bushing wedge into the hollow bore of
the reducer from the same side as the long bushing will be
installed. When installing the tapered bushing wedge into the
reducer hub, install the ange end rst so that the thin taper
is pointing outwards towards the long bushing as shown in
Figure 6. The wedge is properly installed when it snaps into
place in the reducer hub.
A
MINIMUM SHAFT LENGTH
Figure 5 - Minimum Recommended Dimensions

4MN1620
4. Align the tapered bushing wedge keyway with the reducer hub
keyway. The keyway in the wedge is slightly wider than the
keyway in the reducer hub allowing for easier installation.
5. Install one bushing backup plate on the end of the hub and
secure with the supplied retaining ring. Repeat procedure for
other side.
6. Install the short bushing; ange rst, on the driven shaft and
position per dimension “A”, as shown in Table 1. This will allow
the bolts to be threaded into the bushing for future bushing
and reducer removal.
7. Insert the output key in the shaft and bushing. For easy of
installation, rotate the driven shaft so that the shaft keyseat is
at the top position.
8. Mount the reducer on the driven shaft and align the shaft key
with the reducer hub keyway. Maintain the recommended
minimum distance “A” from the shaft bearing.
9. Insert the screws, with washers installed, in the unthreaded
holes in the bushing ange and align with the threaded holes
in the bushing backup plate. If necessary, rotate the bushing
backup plate to align with the bushing screws. Tighten the
screws lightly. If the reducer must be positioned closer than
dimension “A”, place the screws with washers installed, in the
unthreaded holes in the bushing before positioning reducer
making sure to maintain at least 3.0mm between the screw
heads and the bearing.
10. Place the long bushing in position on the shaft and align the
bushing keyway with the shaft key. Use care to locate the
long bushing with the tapered bushing wedge installed earlier.
Align the unthreaded holes in the bushing with the threaded
holes in the bushing backup plate. If necessary, rotate the
bushing backup plate to align with the bushing holes. Insert
bushing screws, with washers installed in the unthreaded
holes in the bushing. Tighten screws lightly.
11. Alternately and evenly tighten the screws in the bushing
nearest the equipment to the recommended torque given in
Table 1. Repeat procedure on outer bushing.
Straight Bore Reducer Installation
1. Install reducer on the driven shaft as close to the equipment
as practical.
2. It is not necessary for the shaft to extend through the full
length of the bore. Minimum shaft lengths are provided in
Table 1. It is preferred that both retaining collars are used;
however, if shaft length will not permit the use of both
retaining collars, one collar is sucient for locking the reducer
onto the shaft.
3. Tighten the set screws provided in each retaining collar. If
the outer retaining collar is not being used, remove from the
reducer to avoid retaining collar from dislodging and jamming
the reducer during operation.
Bushing Removal - Standard Taper or Short Shaft
Bushings
1. Remove bushing screws.
2. Place the screws in the threaded holes provided in the
bushing anges. Tighten the screws alternately and evenly
until the bushings are free on the shaft. For ease of tightening
screws make sure screw threads and threaded holes in the
bushing anges are clean. If the reducer was positioned
closer than the recommended minimum distance “A” as
shown in Table 1, loosen the inboard bushing screws until
they are clear of the bushing ange by 3.0mm. Locate two
(2) wedges at 180 degrees between the bushing ange and
the bushing backup plate. Drive the wedges alternately and
evenly until the bushing is free on the shaft.
3. Remove the outside bushing, the reducer, and then the
inboard bushing.
Straight Bore Reducer Removal
1. Loosen screws in retaining collars as applicable.
2. If both retaining collars are installed, remove the outer
retaining collar. This will expose three puller holes in the
output hub.
3. Install a three-jaw puller and remove reducer from shaft.
Use caution not to damage the output hub during reducer
removal.
Figure 6 - Short Shaft Bushing &
Output Hub Assembly

5MN1620
LUBRICATION
NOTE: Because reducer is shipped without oil, it is
necessary to add the proper amount of oil before operating
reducer. Use a high-grade petroleum base rust and oxidation
inhibited (R&O) gear oil – see tables. Follow instructions on
reducer warning tags, and in the installation manual.
Under average industrial operating conditions, the lubricant
should be changed every 2500 hours of operation or every 6
months, whichever occurs rst. Drain reducer and ush with
kerosene, clean magnetic drain plug and rell to proper level with
new lubricant.
CAUTION: Too much oil will cause overheating and too little
will result in gear failure. Check oil level regularly. Failure to
observe this precaution could result in bodily injury.
Under extreme operating conditions, such as rapid rise and fall of
temperature, dust, dirt, chemical particles, chemical fumes, or oil
sump temperatures above 90°C, the oil should be changed every
1 to 3 months, depending on severity of conditions.
See Table 2–Oil Volumes for more information.
Table 2–Oil Volumes by Mounting Position
Case Size Ratios
Oil Volume in Liters
Horizontal Vertical
A (9:00) B (6:00) C (3:00) D (12:00) E (Up ) F (Down)
TA0107L Single 0,6 0,5 0,6 1,3 1,2 1,4
Doubles 0,6 0,5 0,6 1,3 1,2 1,3
TA1107H Single 1,3 0,7 0,6 1,6 1,4 1,8
Doubles 1,3 0,7 0,6 1,6 1,4 1,8
TA2115H
Single 2,0 1,2 1,0 2,5 2,2 2,9
Doubles 2,0 1,1 1,0 2,5 2,3 2,8
TA3203H Single 2,7 1,6 1,7 3,9 3,1 4,2
Doubles 2,7 1,4 1,6 3,8 3,3 4,0
TA4207H Single 4,2 2,5 2,8 7,0 6,0 7,3
Doubles 4,2 2,4 2,6 6,9 6,0 7,1
TA5215H Single 7,0 4,7 5,5 12,5 11,0 12,4
Doubles 7,0 4,4 5,2 12,2 10,8 11,9
TA6307H Single 8,3 5,5 6,2 15,3 12,5 15,3
Doubles 8,4 5,2 5,9 15,0 13,1 14,5
TA7315H Single 8,0 11,1 13,2 21,3 20,9 23,7
Doubles 7,9 10,3 12,5 20,9 21,2 21,8
TA8407H Doubles 7,3 11,1 12,9 23,8 22,7 24,4
TA9415H Doubles 16,1 15,9 17,1 31,4 31,4 36,5
TA10507H Doubles 36,0 26,1 24,4 50,6 50,9 53,0
TA12608H Doubles 50,2 39,3 35,1 66,9 68,3 76,1
Notes:
1. Oil quantity is approximate. Service with lubricant until oil runs out of oil level hole.
2. Below 15 RPM output speed, oil level must be adjusted to reach the highest oil level plug. If reducer position is to vary from those shown in Figure 1, either more or
less oil may be required. Consult Dodge Product Support.
3. Refer to Figure 1 for mounting positions.

6MN1620
Table 3–Oil Recommendations
ISO Grades For Ambient Temperatures of 10ºC to 51ºC
Output
RPM
Torque-Arm II Reducer Size
TA0107LM TA1107HM TA2115HM TA3203HM TA4207HM TA5215HM TA6307HM TA7315HM TA8407HM TA9415HM TA10507HM TA12608HM
301–400 320 320 320 220 220 220 220 220 220 220 220 220
201–300 320 320 320 220 220 220 220 220 220 220 220 220
151–200 320 320 320 220 220 220 220 220 220 220 220 220
126–150 320 320 320 220 220 220 220 220 220 220 220 220
101–125 320 320 320 320 220 220 220 220 220 220 220 220
81–100 320 320 320 320 320 220 220 220 220 220 220 220
41–80 320 320 320 320 320 220 220 220 220 220 220 220
11–40 320 320 320 320 320 320 320 320 320 320 220 220
1–10 320 320 320 320 320 320 320 320 320 320 320 320
ISO Grades For Ambient Temperatures of -9ºC to 16ºC
Output
RPM
Torque-Arm II Reducer Size
TA0107LM TA1107HM TA2115HM TA3203HM TA4207HM TA5215HM TA6307HM TA7315HM TA8407HM TA9415HM TA10507HM TA12608HM
301–400 220 220 220 150 150 150 150 150 150 150 150 150
201–300 220 220 220 150 150 150 150 150 150 150 150 150
151–200 220 220 220 150 150 150 150 150 150 150 150 150
126–150 220 220 220 150 150 150 150 150 150 150 150 150
101–125 220 220 220 220 150 150 150 150 150 150 150 150
81–100 220 220 220 220 220 150 150 150 150 150 150 150
41–80 220 220 220 220 220 150 150 150 150 150 150 150
11–40 220 220 220 220 220 220 220 220 220 220 150 150
1–10 220 220 220 220 220 220 220 220 220 220 220 220
Notes:
1. Assumes auxiliary cooling where recommended in the catalog.
2. Pour point of lubricant selected should be at least 6ºC lower than expected minimum ambient starting temperature.
3. Extreme pressure (EP) lubricants are not necessary for average operating conditions. When properly selected for specic applications, Torque-Arm II backstops are
suitable for use with EP lubricants.
4. Special lubricants may be required for food and drug industry applications where contact with the product being manufactured may occur. Consult a lubrication
manufacturer’s representative for his recommendations.
5. For reducers operating in ambient temperatures between -30ºC and -6.6ºC use a synthetic hydrocarbon lubricant, 100 ISO grade or AGMA 3 grade (for example, Mobil
SHC627). Above 51ºC, consult Dodge Gear Application Engineering (864) 288–9050 for lubrication recommendation.
6. Mobil SHC630 Series oil is recommended for high ambient temperatures.

7MN1620
GUIDELINES FOR TORQUE-ARM II
REDUCER LONG-TERM STORAGE
During periods of long storage, or when waiting for delivery or
installation of other equipment, special care should be taken to
protect a gear reducer to have it ready to be in the best condition
when placed into service.
By taking special precautions, problems such as seal leakage
and reducer failure due to lack of lubrication, improper lubrication
quantity, or contamination can be avoided. The following
precautions will protect gear reducers during periods of extended
storage.
Preparation
1. Drain oil from the unit. Add a vapor phase corrosion inhibiting
oil (VCI-105 oil by Daubert Chemical Co.) in accordance with
Table 4.
2. Seal the unit airtight. Replace the vent plug with a standard
pipe plug and wire the vent to the unit.
3. Cover all unpainted exterior parts with a waxy rust
preventative compound that will keep oxygen away from the
bare metal. (Non-Rust X-110 by Daubert Chemical Co. or
equivalent)
4. The instruction manuals and lubrication tags are paper and
must be kept dry. Either remove these documents and store
them inside, or cover the unit with a durable waterproof cover
which can keep moisture away.
5. Protect reducer from dust, moisture, and other contaminants
by storing the unit in a dry area.
6. In damp environments, the reducer should be packed inside
a moisture-proof container or an envelope of polyethylene
containing a desiccant material. If the reducer is to be stored
outdoors, cover the entire exterior with a rust preventative.
When Placing the Reducer into Service
1. Fill the unit to the proper oil level using a recommended
lubricant. The VCI oil will not aect the new lubricant.
2. Clean the shaft extensions with petroleum solvents.
3. Assemble the vent plug into the proper hole.
See Table 4 for VCI #105 oil quantities by reducer size.
Table 4–Quantities of VC1 #105 Oil
Reducer Size Quantity (ounce/milliliter)
TA0107LM 1/30
TA1107HM 1/30
TA2115HM 1/30
TA3203HM 1/30
TA4207HM 1/30
TA5215HM 2/59
TA6307HM 2/59
TA7315HM 3/89
TA8407HM 3/89
TA9415HM 4/118
TA10507HM 6/177
TA12608HM 8/237
VCI #105 and #10 are interchangeable.
VCI #105 is more readily available.

8MN1620
OIL VISCOSITY EQUIVALENCY CHART
2000
1000
800
600
500
400
300
200
100
80
60
50
40
30
20
10
8
6
5
4
3
2
70
60
50
40
30
20
10
8
5
4
9
7
6
1500
1000
680
460
320
220
150
100
68
8A
8
7
6
5
4
3
2
85W
250
140
90
80W
46
32
22
15
10
7
5
1
75W
3
2
300
200
150
100
80
70
60
50
40
35
32
400
500
600
800
1000
1500
2000
3000
4000
5000
6000
8000
10,000
cSt/
40°C 100°C
cSt/ ISO
VG
AGMA
GRADES
GRADES
GEAR OILS
SUS/
100°F
SUS/
210°F
SAE
KINEMATIC
VISCOSITIES
SAYBOLT
VISCOSITIES
200
300
100
90
80
70
60
55
50
45
40
VISCOSITIES CAN BE
RELATED HORIZONTALLY
ONLY.
VISCOSITIESBASED ON
96 VI SINGLE GRADE
OILS.
ISO ARE SPECIFIED AT
40°C.
AGMA ARE SPECIFIED AT
40°C.
SAE 75W, 80W, AND 85W
SPECIFIED AT LOW
TEMPERATURE. EQUIVALENT
VISCOSITIES FOR 100°F
AND 200°F ARE SHOWN.
SAE 90 TO 250 SPECIFIED
AT 100°C.

9MN1620
BACKSTOPS
WARNING: To ensure that drive is not unexpectedly started,
turn o and lock out or tag power source before proceeding.
Remove all external loads from drive before removing or
servicing drive or accessories. Failure to observe these
precautions could result in bodily injury.
1. Remove backstop shaft cover and gasket, shown in Figure 9.
These parts will not be reused. This cover is directly opposite
the extended end of the input shaft.
2. Clean the face of the gearbox to remove any gasket material
or contamination from the cover mounting surface. It is
important that contamination not get into the gearbox or the
backstop during the backstop installation/servicing process.
3. Face reducer looking at the side from which the cover
was removed. Determine carefully the desired direction of
free rotation. It is important that the direction be correctly
determined because to reverse the direction after the
backstop is installed, it is necessary to remove the backstop,
turn it end-for-end and then reinstall it.
4. Match the arrow on the backstop inner race to the direction
of free rotation for the desired shaft. Note that reversing the
backstop end-for end changes the direction of the arrow.
The shaft will rotate in the same direction as the arrow on the
backstop.
5. If the backstop kit has a spacer ring included, install it onto the
shaft rst, adjacent to the bearing inner ring.
6. Install the backstop inner race and sprag cage assembly
onto the shaft. DO NOT remove the cage from the inner
race or the shipping strap from the sprag set at this time.
Insert the key into the inner race and mating shaft keyway.
These parts should slip onto the shaft easily; a light coating
of oil may assist in assembly. Do not use a hammer to force
the installation, damage can occur to the shaft and/or the
backstop. Slide the race against the spacer or the shaft
shoulder and install the retaining ring into the groove in the
shaft. Only use the supplied key, as it is specically designed
for each backstop.
7. Apply a thin coating of RTV silicone onto the gearbox mating
surface for the outer race (same as the cover area). It is
important to apply the sealant around the fastener holes to
prevent leakage. Do not allow excessive amounts of silicone
to enter the gearbox or to be applied to other parts.
8. Install the outer race by gently rotating it opposite the shaft
rotation while pressing lightly inwards. Do not force the outer
race into position as backstop damage may occur. Once
the outer race is well piloted onto the sprag set, remove the
shipping strap from the sprag set by cutting it, being careful
not to let the outer race back o the sprags. The outer race
should slide easily into position with a slight turning motion.
A light coating of oil on the race inner diameter may ease
installation.
9. Align the fastener holes in the outer race with the mating
holes in the gearbox. Use the supplied grade 5 fasteners
and lock washers only. Torque the fasteners in an alternating
pattern per Table 5.
Table 5–Backstop Fastener Torque Values
Reducer Size Fastener Size Torque in N-m
TA0107LM ¼–20×2–1/4" 9 –12
TA1107HM ¼–20×2–1/4" 9 –12
TA2115HM ¼–20×2–1/4" 9 –12
TA3203HM ¼–20×2–1/4" 9 –12
TA4207HM ¼–20×2–1/4" 9 –12
TA5215HM 5/16–18×2–1/2" 20–23
TA6307HM 5/16–18×2–3/4" 20–23
TA7315HM 3/8–16×3–1/2" 36–41
TA8407HM 5/16–18×2–3/4" 20–23
TA9415HM 3/8–16×3–1/2" 36–41
TA10507HM 3/8–16×3–1/2" 36–41
TA12608HM 3/8–16×4" 36–41
ARROW ON HUB OF INSTALLED
BACKSTOP MUST MATCH
DIRECTION OF DESIRED
SHAFT ROTATION
BACKSTOP SHAFT
COVER GASKET
BACKSTOP
SHAFT COVER
SPACER (IF APPLICABLE)
OUTER RACE
INNER RACE
RETAINING
RING
BACKSTOP
FASTENERS
BACKSTOP
KEY
REDUCER WITH
BACKSTOP INSTALLED
REDUCER WITHOUT
BACKSTOP INSTALLED
Figure 7 - Backstop Assembly

10 MN1620
COOLING FAN INSTALLATION
WARNING: To ensure that drive is not unexpectedly started,
turn o and lock out or tag power source before proceeding.
Remove all external loads from drive before removing or
servicing drive or accessories. Failure to observe these
precautions could result in bodily injury.
Unpack all components and inspect for shipping damage. Do
not use any component that has been damaged or modied.
Make sure all components are clean and free of any foreign
material prior to assembly. Cooling fan assembly is designed to
t onto the input shaft before placement of sheaves or belt guard
assembly.
Installation for TA4207CFM and TA5215CFM
1. Referring to Figure 8, install tapered bushing (9) into bore
of fan blade assembly (2) and loosely install the three set
screws provided with fan. Snug set screws but do not tighten
at this time.
2. Slide fan assembly onto input shaft and install input shaft key.
Note: Key is supplied with the TAll reducer. Locate fan blade
edge distance “A” (Figure 8) from end of shaft per Table 6.
Make sure fan assembly rotates without interference when
input shaft is rotated.
3. Alternately tighten the set screws until fan assembly is
securely installed on the input shaft.
4. Recheck fan assembly for proper location and clearance.
Loosen set screws and repeat steps 2 and 3 above if not
properly located.
Installation for TA6307CFM through TA12608CFM
1. Referring to Figure 8, install fan guard back plate assembly
(1) using the four bolts (4) provided. Note that the screen
is mounted towards the reducer. Tighten to recommended
torque in Table 5.
CAUTION: Fan guard screen has sharp edges. Use
caution when installing to avoid lacerations.
2. Slide fan blade assembly (2) onto input shaft and install
key and set screws (5). Note: Key is supplied with the TAll
reducer. Position fan blade edge distance “A” (Figure 8) from
end of shaft per Table 6. Make sure fan assembly rotates
without interference when input shaft is rotated. Tighten the
two fan blade set screws (5) securely.
3. Install fan guard cover (3) with four bolts (6), lockwashers (7),
and hex nuts (8). Tighten securely.
4. Verify fan blade rotates freely and does not interfere with fan
guard back plate (1) or fan guard cover (3). Adjust fan blade if
necessary.
Table 6–Dimensions and Bolt Torque
Reducer Size Dim. “A” mm Torque (N-m)
TA4207HM 95 .....
TA5215HM 117 .....
TA6307HM 108 40–45
TA7315HM 111 40–45
TA8407HM 129 40–45
TA9415HM 159 40–45
TA10507HM 159 40–45
TA12608HM 163 40–45
A
A
TYPICAL FOR REDUCER SIZES 4 AND 5
TYPICAL FOR REDUCER SIZES 6 THRU 12
Figure 8 - Fan Blade Placement