Oerlikon S16A2 User manual

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Torque-Hub®Planetary Final Drive
S16A1 & 2 Series Service Manual
Rev 9/3/13

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While every precaution has been taken in the preparation of this document, Fairfield Manufacturing Co. Inc. assumes no
liability with respect to the use of the documentation described herein, or for any act or omission of Fairfield Manufacturing
Co. Inc. concerning this documentation. Torque-Hub®is a registered trademark of Fairfield Manufacturing Co. Inc.
Features and specifications are subject to change without notice.

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Planetary Final Drive Service Manual
Content
Introduction 04
Roll and Leak Test 05
Tightening and Torquing Bolts 07
Lubrication Information 08
Disassembly Instructions Main Disassembly 11
Cover Disassembly 14
Output Carrier Disassembly 16
Input Carrier Disassembly 17
Housing-Spindle Disassembly 20
Assembly Instructions Cover Subassembly 24
Input Carrier Subassembly 26
Output Carrier Subassembly 30
Housing Spindle Subassembly 32
Main Assembly 33
Assembly Drawing 36
Parts List 37
Assembly Tools 39
General Information Contact Information 55

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Planetary Final Drive Service Manual
Introduction
This manual is a step-by-step guide to the disassembly and
assembly of the S12 Series Torque-Hub®units. It is designed for
the customer or mechanic who is repairing this particular Torque-
Hub® model.
Users of this manual should note that each part mentioned is
followed by an identification number enclosed in parentheses.
These part numbers may be referred to in the Parts List and
Assembly Drawing sections of this manual.
Specialized tools used to assemble this unit are noted in the
assembly procedures and diagrammed in the Assembly Tools
section.
Users should familiarize themselves with the procedures for roll and
leak testing, as well as bolt tightening and torquing found on the
following three pages before starting any repairs.
Standard safety practices should be followed during the
disassembly and assembly procedures described. Safety glasses
and safety shoes should be worn, and heavy, heat resistant gloves
should be used when handling heated components. Be especially
alert when you see the word CAUTION. This indicates that a
particular operation could cause personal injury if not performed
properly or if certain safety procedures are not followed. The word
NOTE is used to bring attention to certain procedures or helpful
hints that will aid in the disassembly and assembly process.

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Planetary Final Drive Service Manual
Roll and Leak Test
Torque-Hub®units should always be roll and leak tested before
disassembly (if possible) and after assembly to make sure the unit’s
gears, bearings, and seals are working properly. The following
information briefly outlines what to look for when performing these
tests.
The Roll Test The purpose of the roll test is to determine if the unit’s gears are
rotating consistently, easily and properly. To perform a roll test, use
the recommended tool from table below (or something equivalent)
to apply constant rotational force to the input of the gearbox. If more
drag is felt in the gears only at certain points, then the gears are not
rolling consistently and easily and should be examined for improper
installation or defects. Some gear packages roll with more difficulty
than others. Do not be concerned if the gears in the unit seem to roll
hard as long as they roll with consistency. Rotate the gearbox both
clockwise and counterclockwise the same number of turns as the
ratio of the unit. The gearbox ratio is the same number as the last
three numbers on the ID tag.
Model code
Roll Test Tool
S12Ax44xx
T223989
S12Ax55xx
T224477
Continued on Next Page

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The Leak Test The purpose of a leak test is to make sure the unit is airtight. To
perform a leak test use the leak test fixture from the table below. If
the tool is not available, the gearbox must be sealed to perform the
test. This can be accomplished by assembling the sealed input
device onto the gearbox at the input end and replace one of the oil
plugs with an air chuck. DO NOT EXCEED 10 PSI PRESSURE
DURING THE LEAK TEST. Higher pressure will create a false
sealing effect in assemblies with lip-seals. The unit has a leak if the
pressure gauge reading on your leak check fitting starts to fall after
the gearbox has been pressurized and allowed to equalize. Leaks
will most likely occur at the pipe plugs, the main seal or wherever
o-rings or gaskets are located. The exact location of a leak can
usually be detected by brushing a soap and water solution around
the main seal and where the o-rings or gaskets meet on the exterior
of the unit and then checking for air bubbles. If a leak is detected in
a seal, o-ring, gasket, the part must be replaced and the unit
rechecked. Leak test at 10 psi for 20 minutes.
Model code
Leak Test Tool
S12Ax44xx
T220225
S12Ax55xx
T173814

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Planetary Final Drive Service Manual
Tightening and Torquing Bolts
If an air impact wrench is used to tighten bolts, extreme care should
be taken to ensure the bolts are not tightened beyond their specified
torque. The following steps describe how to tighten and torque bolts
or socket head cap screws in a bolt circle.
1. Tighten (but do not torque) bolt “A” until snug.
2. Go to the opposite side of the bolt circle and tighten bolt “B” until
equally snug.
3. Crisscross around the bolt circle and tighten the remaining bolts.
4. Use a torque wrench to apply the specified torque to bolt “A”.
5. Using the same sequence, crisscross around the bolt circle and
apply an equal torque to the remaining bolts.

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Planetary Final Drive Service Manual
Lubrication Information
General Properties: The lubricant used in most Torque-Hub®drives should be petroleum
based gear fluid containing anti-oxidation, anti-foaming and extreme
pressure additives. The lubricant should have a minimum viscosity
index of 95cst and maintain a minimum viscosity of 40cst under
normal operating conditions. Some applications require special
considerations; consult the machine manufacturer and Oerlikon
Fairfield for more additional information.
The table below lists the recommended viscosities for various
ambient operating temperatures. These recommendations are
based on temperature rise of 50° to 100°F at normal operating
conditions.
Continued on Next Page
Differential Planetary Simple Planetary
Ambient
Temperature
ISO Index
AGMA
Lubricate
Number
ISO Index
AGMA
Lubricate
Number
-40° to -5° F(1)
VG100
3EP
VG100
3EP
-5°to 40° F
VG150
4EP
VG100
3EP
40° to105° F
VG220/VG320
5EP/6EP
VG150/VG220
4EP/5EP
105° to 150° F(2)
VG460
7EP
VG320
6EP
Footnotes
1. For operation in this ambient temperature range, synthetic oil is recommended with a pour point of
10°F lower than the minimum ambient temperature.
2. For operation in this ambient temperature range, synthetic oil is recommended for proper lubricant
life at elevated temperatures.

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Maintenance Oil amounts for each series of Torque-Hub®drives are indicated in
the appropriate series literature. An initial oil change should be
made after the first 50 hours of operation. Subsequent oil changes
should be made at 1,000 hour intervals or annually, whichever
comes first.
Oil temperatures should be not higher than 160° to 180°F for
continuous operation, and no higher than 200°F for intermittent
operation. For special applications, high horsepower, high speeds
or wide temperature changes, please consult Oerlikon Fairfield.
Oil Fill Level When the Torque-Hub®unit is mounted horizontally, unless
otherwise specified, the gearbox should be filled half-full of oil.
Consult the appropriate series literature for approximate fill
volumes. Vertically mounted Torque-Hub®units may require special
lubrication procedures. Please contact Oerlikon Fairfield for
vertically mounted applications.

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DISASSEMBLY

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Planetary Final Drive Service Manual
Main Disassembly
NOTE: Figure 1 refers to SAE “C” motor mount
NOTE: Figure 2 refers to SAE “D” motor mount
Continued on Next Page

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1. Perform roll check and leak check prior to disassembling the unit.
2. Remove the magnetic Pipe Plug (20) from Input Cover (17) and drain the oil out of the
gearbox.
NOTE: Record the condition and volume of the oil.
3. Remove four of Shoulder Bolts (18) followed by sixteen of Hexagonal Bolts (15) from Cover
Subassembly.
4. Lift the Cover Subassembly off of the unit.
NOTE: For 29 and 40 to 1 ratios only.
5. Remove Sun Gear (27) from Input Carrier Subassembly.
6. Remove Input Carrier Subassembly off of the unit.
NOTE: Figure 1 refers to 29 and 40 : 1 Ratios
Continued on Next Page

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NOTE: Figure 2 refers to 20 : 1 Ratio
7. Remove two Thrust Washers (10) and a Thrust Bearing (9) from the hub of Input Carrier
Subassembly.
8. Remove the Sun Gear (4) from Output Carrier Subassembly.
9. Lift out the Ring Gear (2) from Housing Spindle Subassembly.
10. Remove Output Carrier Subassembly from the unit from the Housing Spindle Subassembly.
11. Remove O-Ring (5) from groove of the Housing Spindle Subassembly.
This concludes the Main Disassembly.

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Planetary Final Drive Service Manual
Cover Disassembly
NOTE: Figure 1 refers to SAE “C” motor mount
NOTE: Figure 2 refers to SAE “D” motor mount
Continued on Next Page

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1. Remove the O-Ring (5) from counter-bore in Cover (17) and Discard O-Ring.
2. Remove two Thrust Washers (10) and Thrust Bearing (9) from Cover (17).
3. Remove Thrust Washer (8) from the Cover (17).
4. Remove Thrust Washer (19) from counter-bore in Cover (17).
NOTE: For SAE “C” cover skip steps 5 and 6.
5. Remove Adaptor Mount (29) from Cover (17).
6. Remove O-Ring (28) from pilot on Adaptor Mount (29) and discard it.
This concludes the Cover Disassembly.

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Planetary Final Drive Service Manual
Output Carrier Disassembly
1. Unbend tang of Tanged lock-Washer (6N) from the Bearing Nut (6P) and remove Bearing
Nut (6P) and Tanged Lock-Washer (6N) from the Planet Shaft (6E).
2. Remove Planet Shaft (6E) from the Carrier (6A).
3. Remove Lock Pin (6Q) from slot of Carrier (6A).
4. Slide out Planet Gear Subassembly from the window of the Carrier (6A).
5. Remove Thrust Washer (6B) from counter-bore in Carrier (6A).
6. Remove both Bearing Cones (6D) from bore of Planet Gear (6F).
7. Remove both Bearing Cups (6C) from bore of Planet Gear (6F) with a punch.
8. Remove Thrust Spacer (6U) from the bore of Planet Gear (6F).
CAUTION: Safety glasses must be worn during these next steps.
9. Remove Internal Retaining Ring (6T) from groove in Planet Gear (6F).
10. Repeat Steps 1 through 10 for remaining two Planet Gears (6F).
This concludes the Output Carrier Disassembly.

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Planetary Final Drive Service Manual
Input Carrier Disassembly 29 & 40 to 1
1. Unbend tang of Tanged Lock-Washer (3H) from the Bearing Nut (3G) and remove Bearing
Nut (3G) and Tanged Lock-Washer (3H) from the Planet Shaft (3E).
2. Remove Planet Shaft (3E) from the Carrier (3A).
3. Remove Lock Pin (3D) from slot of Carrier (3A).
4. Slide out Planet Gear Subassembly from the window of the Carrier (3A).
5. Remove Thrust Washer (3B) from window of Carrier (3A).
NOTE: Bearing (3C) is a matched assembly and must be kept as a set.
6. Remove both Bearing Cones (3C) from bore of Planet Gear (3F).
NOTE: Do not remove the bearing cups or retaining ring unless replacing the bearing. The
bearing cones must be driven out with a punch, the retaining ring/spacer must be cut out.
7. Remove Retaining Ring (3C) from internal groove of Planet Gear (3F).
8. Repeat Steps 1 through 10 for remaining two Planet Gears (3F).
See next page for 20:1 Input Carrier Disassembly
This concludes the Input Carrier Disassembly 29 & 40 TO 1.

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Planetary Final Drive Service Manual
Input Carrier Disassembly 20 to 1
1. Unbend tang of Tanged Lock-Washer (3H) from the Bearing Nut (3G) and remove Bearing
Nut (3G) and Tanged Lock-Washer (3H) from the Planet Shaft (3E).
2. Remove Planet Shaft (3E) from the Carrier (3A).
3. Remove Lock Pin (3D) from slot of Carrier (3A).
4. Slide out Planet Gear Subassembly from the window of the Carrier (3A).
5. Remove Thrust Washer (3B) from window of Carrier (3A).
NOTE: Bearing (3C) is a matched assembly and must be kept as a set.
6. Remove both Bearing Cones (3C) from bore of Planet Gear (3F).
NOTE: Do not remove the bearing cups or retaining ring unless replacing the bearing. The
bearing cones must be driven out with a punch, the retaining ring/spacer must be cut out.
7. Remove Retaining Ring (3C) from internal groove of Planet Gear (3F).
8. Repeat Steps 1 through 10 for remaining two Planet Gears (3F).
Continued on Next Page

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CAUTION: Safety glasses must be worn during these next steps.
9. Remove Retaining Ring (11) from Coupling (12). Slide coupling from Sun Gear (3J).
10. Remove Retaining Ring (25) from Coupling (12).
11. Remove Sun Gear (3J) from Carrier (3A) through one of the planet carrier windows.
This concludes the Input Carrier Disassembly 20 TO 1.

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Planetary Final Drive Service Manual
Housing-Spindle Disassembly
1 Set the unit on bench such that Housing (1G) small diameter end is facing down.
Continued on Next Page