Dover TWG LANTEC 200 Manual

MODEL 200 ·540 ·750
WINCH
OPERATION
&
MAINTENANCE MANUAL
WHEN ORDERING REPAIR PARTS FOR THE LANTEC PLANETARY WINCH ALWAYS
QUOTE THE SERIAL NUMBER OF THE UNIT.
Model No. #
Serial No. #
Assembly No. #
Installation No. #
Date Shipped Month Year
Driven to Excellenc
e
BRAKES & CLUTCHES
WINCHES & HOISTS
GEAR DRIVES
LANTEC

TABLE OF CONTENTS
22
9.6. ASSEMBLY DRAWING ..................................................... 22
9.5. INSTALLATION DRAWING .................................................. 22
9.4. MANUAL SUPPLEMENTS (IF ANY) ........................................... 22
9.3. SERVICE BULLETINS (IF ANY) .............................................. 22
9.2. FASTENER TORQUE CHART ................................................ 22
9.1. FACTORY LIMITED WARRANTY ............................................. 22
9. REFERENCE ................................................................. 21
8.6. BRAKE VIBRATES WHEN PAYING OUT A LOAD ............................... 21
8.5. BRAKE WILL NOT CONTROL OR STOP LOAD WHEN PAYING OUT ............... 20
8.4. BRAKE WILL NOT HOLD LOAD .............................................. 19
8.3. REVERSE SPEED IS SLOWER THAN FORWARD SPEED ........................ 19
8.2. CONSIDERABLE REDUCTION IN LINE SPEED ................................. 18
8.1. WINCH WILL NOT PULL LOAD .............................................. 18
8. TROUBLE SHOOTING ........................................................ 17
7.7. DRUM BEARINGS ADJUSTMENT ............................................ 16
7.6. DISASSEMBLY OF GEAR REDUCTIONS ...................................... 16
7.5. ASSEMBLY OF BRAKE ..................................................... 15
7.4. DISASSEMBLY OF BRAKE .................................................. 15
7.3. ASSEMBLY OF MOTOR .................................................... 14
7.2. DISASSEMBLY OF STANDARD MOTOR ...................................... 14
7.1. MOTOR ASSEMBLY REMOVAL .............................................. 14
7. DISASSEMBLY / ASSEMBLY .................................................. 13
6.4. MAINTENANCE SCHEDULE ................................................. 12
6.3. GEAR LUBRICATION SCHEDULE ............................................ 12
6.2. BLEEDING BRAKE SYSTEM ................................................ 12
6.1. PREVENTIVE MAINTENANCE ............................................... 12
6. SERVICE AND GENERAL MAINTENANCE ...................................... 10
5.1. CABLE FERRULE INSTALLATION ............................................ 9
5. START-UP PROCEDURE ....................................................... 8
4.7. PAY OUT APPLICATIONS .................................................... 7
4.6. HYDRAULIC CIRCUIT ....................................................... 6
4.5. HYDRAULIC OILS .......................................................... 6
4.4. FILTER .................................................................... 6
4.3. HOSES .................................................................... 6
4.2. CONTROL VALVE .......................................................... 6
4.1. PUMP ..................................................................... 6
4. HYDRAULIC COMPONENTS .................................................... 5
3.2. STORAGE ................................................................. 4
3.1. LUBRICATION ............................................................. 3
3. INSTALLATION ................................................................ 2
2. THEORY OF WINCH OPERATION ............................................... 1
1.1. WINCH SPECIFICATIONS .................................................... 1
1. INTRODUCTION ...............................................................
LANTEC Product Support - Installation and Maintenance Manual

LANTEC Product Support - Installation and Maintenance Manual

1. INTRODUCTION
To supplement the following descriptions, unfold the Winch Assembly Drawing before
proceeding.
This LANTEC winch consists of the following components starting with the motor:
1. Motor - Standard: Commercial Intertech Model WM76-3 (LANTEC Modified)
2. Clutch - Sprag (Cam) type one way
3. Brake - wet multi-disc type
4. Planetary gear reductions - optional ratios available
5. Drive Shaft
6. Winch Drum
7. Winch Housing.
This winch is "power in/power out" and equal speed in both directions.
1.1. WINCH SPECIFICATIONS
Note : Above performance based on standard WM76-3 hydraulic motor.
Drum speed based on 90 gpm
Drum torque based on starting pressure of 2800 psi and running pressure of 2500 psi
All speeds can be increased by 33% with flows up to 120 gpm
391,05514.95100.36 : 14 : 16 : 14.18 : 1752 561,07810.42144 : 14 : 16 : 16 : 1751 748,1057.81192 : 14 : 16 : 18 : 1750
283,48620.5972.854 : 14.17 : 14.17 : 14.18 : 1542 407,28914.35104.530 : 14.17 : 14.17 : 16 : 1541 543,05210.76139.3728 : 14.17 : 14.17 : 18 : 1540
101,83759.825.09 : 16 : 14.18 : 1202 146,11441.6736 : 16 : 16 : 1201 194,81831.2548 : 16 : 18 : 1200
Drum
Torque
(lbf-in)
Drum
Speed
(rpm)
Total
Ratio
Final
Ratio
Secondary
Ratio
Primary
Ratio
Model
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2. THEORY OF WINCH OPERATION
THE LANTEC HYDRAULIC WINCH is made up of these basic assemblies.
1. Primary drive: motor mount, spring applied / hydraulic released brake, primary
planetary reduction
2. Final reduction: 1 or 2 planetary reduction(s)
3. Drum group: winch drum, winch housing, drive shaft.
The hydraulic motor drives the sun gear of the primary planetary reduction. The output
of this reduction is transmitted by the drive shaft which passes through the center of the
winch drum to the sun gear of the final planetary reduction in the final drive gear
housing. The output from the final planetary reduction is transmitted directly to the
winch drum by a spline connecting the final drive planet hub to the winch drum.
The primary drive also contains a wet multi-disc type brake that runs in hydraulic oil.
The brake is connected to the sun gear of the primary planetary reduction by a cam
type overrunning clutch. The brake is held engaged by springs and is released by an
annular hydraulic piston. This brake piston is connected to the motor port which is
pressurized during reverse (pay out) rotation, and becomes the exhaust port during
forward (haul in) rotation. In this way the brake is held engaged at all times until the
winch is powered in reverse (pay out).
The brake hub forms the outer race of the cam type overrunning clutch. The shaft of the
primary sun gear forms the inner race for the overrunning clutch. When the winch is
powered in forward (haul in) rotation, the overrunning clutch permits the sun gear to run
free and the full power from the hydraulic motor is transmitted to the winch drum. When
hydraulic oil is supplied to the motor for reverse (pay out) rotation, the overrunning
clutch will "lock up" and the motor will not rotate until the pressure builds up and
releases the brake sufficiently to permit the primary sun gear and brake plates to rotate
as a solid unit.
The unit can be used to pay out any load (up to the designed maximum load) with
smooth acceleration and deceleration. This is achieved by the special design of the
self-regulating friction brake. When a load is applied to the cable on the winch drum it
causes the overrunning clutch to "lock up" and the load is held entirely by the friction
brake. In order to lower the load, hydraulic pressure is applied to the reversing side of
the motor. The brake piston also sees this pressure, and, when the pressure becomes
high enough, the brake releases sufficiently to allow it to slip. If the load on the winch
drum tried to drive the motor faster than the supply of oil will permit (i.e. if the motor tries
to act as a pump), the hydraulic pressure will decrease in the brake piston causing an
increase in braking effort. In this way a balanced pressure is supplied to the brake
piston according to the load on the winch drum. The speed of the winch in either
direction is purely dependent on the volume of oil supplied to the motor through the
control valve.
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3. INSTALLATION
LANTEC recommends that the mounting and installation of the winch be carried out by
a qualified millwright.
The winch foundation is extremely important for proper winch operation. This
foundation must be planar and completely flat, and must be rigid and unyielding under
full winch load.
It is important to note that LANTEC machines and line bores its winch
housings including the winch mounting pads. This is to ensure that the
winch mounting pads are planar and parallel to the axial alignment of the
winch drum bearings. Therefore the winch housing must be installed onto
a foundation which is within the tolerances specified or the winch drum
bearings will become misaligned, causing premature failure.
One method to mount the winch :
1. Sling it on the drum and carefully lower the winch until three of the four winch base
pads just contact the foundation
NOTE: Hardened flat washers must be used under the bolt heads;
DO NOT use lockwashers
2. Install mounting bolts, Grade 5 minimum, on the three pads in contact with the
foundation and torque them to their correct value
3. Measure any gap between the fourth pad and the foundation with a feeler gauge
NOTE: The maximum misalignment of 0.002"/ft. from mounting hole to mounting
hole on either end of the winch measuring perpendicular to the drum
4. If the misalignment is outside of tolerance then the gap between foundation and the
fourth pad must be shimmed to correct this
5. Once the correct shims are in place, the remaining bolt(s) can be installed and
torqued to their correct value.
DO NOT WELD TO ANY PART OF THE WINCH
Do not operate or perform any lubrication, maintenance or
repair on this product, until you have read and understood the
operation, lubrication, maintenance and repair information.
CAUTION
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INSTALLATION (cont’d)
3.1. LUBRICATION
THE WINCH IS SHIPPED WITHOUT LUBRICATING OIL AND
MUST BE FILLED TO THE PROPER LEVEL WITH THE
CORRECT GRADE OF OIL PRIOR TO OPERATION.
CAUTION
NOTE: Small amounts of oil may remain from factory testing procedures.
The pour point of the oil should be lower than the lowest expected starting temperature.
The following table gives the recommended viscosity in relation to ambient temperature:
AGMA 6EP
ISO VG320
320 cSt at 40°C
AGMA 5EP
ISO VG220
220 cSt at 40°C
AGMA 3EP
ISO VG100
100 cSt at 40°C
+10° to +50° C
+50° to +122° F
0 to +30°C
32 to +86°F
-10° to +15° C
+14° to +59° F
Ambient Temperature
Note: cSt is the same as mm2/s.
For special conditions consult factory for recommendations.
The recommended working temperature of the sump should be between 50 and
70°C (122 to 158°F).
The intermittent peak temperature of the sump should be no greater than 95°C
(203°F).
The winch gear reduction cavities are filled via the upper most filler plug. Fill with gear
oil until it reaches the filler/level plug. DO NOT OVERFILL as this may cause the gear
reductions to overheat.
Use mineral oils containing EP additives which increase the oil film load carrying
capacity of the oil.
The Winch is supplied with a VENT. It is necessary that the oil sump be vented at the
highest circulating port above the oil level.
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INSTALLATION (cont’d)
3.2. STORAGE
LANTEC routinely ships winches with a small amount of vaporizing storage oil
(oxidization inhibitor) in the drive compartments to protect the components during
shipping.
This protection is sufficient for temporary storage indoors of up to 2 weeks prior to
startup.
For storage up to two years indoors or six months outdoors the following must be done:
yIf stored outdoors, protect unit from any direct exposure to weather
yReplace vent and any plastic plugs with appropriate metal plugs and O-Rings
yFill both gear cavities to approximately 25% capacity (5 US gallons total) with:
Shell VSI circulating oil 68 (or equivalent rust inhibiting vaporizing oil)
yFill Brake completely via the Vent Port ‘Q’ with hydraulic oil
yFill Brake Piston cavity completely via the Bleed Port with hydraulic oil
ySeal off Motor ports with gasketed steel blanking plates.
Prior to Operation:
yReplace metal plugs with appropriate fittings, including vent
yDrain Gear cavities of rust inhibiting oil and fill with gear oil as per section 3.1
LUBRICATION.
Figure 1
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4. HYDRAULIC COMPONENTS
Basic components to be used with the winch (not supplied by LANTEC):
4.1. PUMP
The pump used with the winch should be capable of producing the volume of oil at the
rated pressure shown for each model in section 1.1. WINCH SPECIFICATIONS.
4.2. CONTROL VALVE
The control valve used to operate this winch should be a four-way, spring return to
neutral, open center valve having a motor spool, eg. all work ports must be open to the
reservoir when the valve spool is in the neutral position. This control valve should have
good metering characteristics in order to provide smooth winch control and have a
built-in relief valve suitable for the maximum operating pressure.
When the winch control valve is to be installed between the pump and an existing
control valve, it will be necessary to use a control valve for the winch which has a "high
pressure carryover" or "power beyond" port.
4.3. HOSES
In order to maintain maximum efficiency in the winch, select the size of hydraulic lines
according to the maximum volume oil to be used in the winch (see table). If the
hydraulic lines used are too small, they may cause excessive back pressure at the
reverse motor port sufficient to release the brake.
ø1.50” / [ø38mm]ø1.25” / [ø32mm]45-69 gpm / [170-264 l/min] ø1.75” / [ø44mm]ø1.50” / [ø38mm]70-94 gpm / [265-359 l/min] ø2.25” / [ø57mm]ø2” / [ø51mm]95-140 gpm / [360-530 l/min] Return Lines Inside DiameterPressure Lines Inside diameterOil Flow (gpm) / [l/min] HOSE REQUIREMENTS
Line from Port “Q” - ø3/4” / [ø19mm] minimum.
The sizes shown in the table are to be used as a guide only. If trouble is experienced due to the use of
long hoses, it will be necessary to use hoses which are one size larger.
4.4. FILTER
When these winches are installed with their own hydraulic system or when there is no
filter in the existing circuit, a partial flow micro-filter should be installed between the
control valve and the reservoir. This should trap particles over 10 microns in size.
4.5. HYDRAULIC OILS
LANTEC makes the following recommendations concerning hydraulic oils:
1. Anti-wear type hydraulic oils. These oils are generally developed and evaluated on
the basis of pump wear tests such as ASTM-D2882. These oils offer superior
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HYDRAULIC COMPONENTS (cont’d)
protection against pump and motor wear. They also provide good demulsibility as
well as protection against rust.
2.Automotive type crankcase oils having letter designation "SC", "SD" or "SE".
These oils in the 10W viscosity range are excellent for severe hydraulic service
where there is little or no water present.
4.6. HYDRAULIC CIRCUIT
In order to cool the brake and remove contaminants, oil is normally circulated through
the brake housing by means of internal circulation which leaves from port "Q". The
hose from port "Q" may be a low pressure hose with "push on" fittings and must go
directly to the reservoir. Port "Q" should be located within 15 degrees of top dead
center, to ensure that the housing is filled with oil at all times.
The basic hydraulic schematic illustrated is for all applications. Review "PAY OUT
APPLICATIONS" to determine whether external oil circulation is required for your
installation.
Figure 2
**NOTE:** Configuration of external brake port shown above on Figure 2 coincides with Trouble Shooting in
Section 8. For any other brake release configurations, parts of Section 8 may not apply.
The hydraulic schematic in Figure 2 shows a partial flow micro-filter being used to both filter
the oil and create back pressure to cause circulation through the brake housing.
The filter should be installed close to the reservoir and the circulating line to port "P" should be
connected from a point close to the oil filter as shown. Port "Q" should be connected directly
to the reservoir as shown (below the oil level).
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HYDRAULIC COMPONENTS (cont’d)
4.7. PAY OUT APPLICATIONS
A candidate for external oil circulation is an application that requires pay out of a load
for a period of more than 5 minutes. If you require assistance in determining the
amount of oil required for circulation, contact the factory.
The oil should be circulated through the Brake Housing via the circulation port marked
"P" and out through the vent port marked "Q" on the hydraulic schematic.
NOTE: Raised cast letters have been used to clearly identify these two ports on the
winch.
The hoses used for these two lines can be "push on" type low pressure hoses
THE PRESSURE IN THE BRAKE HOUSING DUE TO CIRCULATING OIL MUST NOT
EXCEED 10 PSI (0.7 ATM).
EXCESSIVE PRESSURES WILL DAMAGE THE OIL SEALS.
Once the hydraulic circuit has been completed, bleed all air from the brake housing
before running the drive.
For installations where the amount of heat absorbed by the oil is greater than the
cooling capacity of the reservoir and the other components, it is necessary to install a
heat exchanger. The temperature of oil at any point in the system must not be allowed
to exceed 180° F (82° C). It is recommended that the pump inlet temperature be limited
to 130° F (54° C). Definite operational advantages will be obtained by operating below
130° F (54° C).
In order to obtain smooth control during low speed pay out, it is recommended that the
hydraulic pump be operated at maximum speed.
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5. START-UP PROCEDURE
DO NOT operate the winch until all conditions in previous sections have been
completed.
yDisconnect hoses at motor ports and fill with oil to ensure lubrication while motor
first turns over
yBack-off main relief valve to avoid chance of immediate danger to motor and
system in case of incorrect hook-up
yRun motor for 2 to 3 minutes in haul in direction (low pressure) to check that
everything is functioning correctly
yOperate motor for 2 to 3 minutes in pay out direction. The pressure should be
approximately 700-800 psi
yBleed brake piston of air
yCheck that oil circulation flow from ‘Port P’ is between 2 and 3 gpm and that the
pressure is less than 10 psi
yCheck that when the control valve is placed in the neutral position after operating
in the pay out direction, the pressure returns immediately to zero (i.e. oil returns to
tank and brake applies)
yInstall the cable onto winch drum using ferrule provided (see following section).
Operator of winch must ensure that a minimum of five (5) dead
wraps of cable are maintained on the drum at all times.
WARNING
!
Do not operate or perform any lubrication, maintenance or
repair on this product, until you have read and understood the
operation, lubrication, maintenance and repair information.
CAUTION
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START-UP PROCEDURE (cont’d)
5.1. CABLE FERRULE INSTALLATION
Install the cable on the drum using the ferrule provided.
Caution: Wedge-type Cable Ferrules are
intended only for use with new 6x19 or 6x37
Class, right regular lay EIP or IWRC wire rope.
1. Slip ferrule over rope. Then, unlay strands
and slip profile wedge over core strand
(about half the length of the wedge).
2. Relay the strands around the wedge,
placing each in its proper groove. Run the
ferrule back toward the wedge as far as it
will go.
3. Hold wedge with pliers near the top and
turn clockwise about 1/8 turn or until the
strands snap into grooves in the ferrule.
Drive in wedge slightly to hold strands in
this position. Strands should project from
top of ferrule about 1/2” - not below the
top.
4. Drive the wedge in as far as it will go with
a hammer and a short pipe that fits over
the core strand and inside the main
strands. Wedge may be inserted to 1/8”
below the top of the ferrule.
5. Installation completed - ferrule and wedge
must look like this for good performance.
Strands will slip some until they grip the
wedge and become firmly seated. Wedge
should be about 1/4” below ends of
strands.
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START-UP PROCEDURE (cont’d)
For cables over ø1.25” use zinc type ferrule.
This procedure requires the use of a commercial acid. Consult the
acid manufacturer for proper procedures for the mixing, use and
disposal of this product. Protective clothing required.
! WARNING !
Wire Rope Socketing. Ferrules made from forged steel may be attached to wire rope as follows:
1. The wire rope should be securely seized before cutting and not less than two additional seizings
placed at a distance from the end equal to the length of the basket of the ferrule. For large ropes the
seizing should be several inches long and securely wrapped with a seizing iron. This is very
important as it prevents untwisting of the rope and insures equal tension in the strands when the load
is applied.
2. The end seizing should be taken off, leaving the additional seizing at a distance from the end equal to
the length of the ferrule. Any fiber core should be cut back to this seizing and the wires should be all
untwisted and “broomed out”, although they need not be straightened.
3. The wires, for the distance that they are to be inserted in the ferrule, should be carefully cleaned with
solvents. The wires, for a distance not more than three-quarters of the cleaned length, should be
dipped in commercial muriatic acid, diluted 50% by water, for 30 seconds or until the acid has
thoroughly cleaned each wire. Care should be taken that the acid does not come into contact with
any portion of the rope. If it does, the wires will become brittle.
4. The wires should be dipped in boiling water containing a small amount of soda to neutralize the acid.
5. Before the wires are inserted into the ferrule, warm the ferrule to hand temperature and insert
carefully.
6. The base of the ferrule should be sealed with putty, clay, or similar substance. Pour molten zinc into
the ferrule until it is full.
7. The zinc should not be too hot or it will anneal the wires, particularly those in small wire ropes. The
temperature should not be more than 830°F.
8. When the zinc has solidified sufficiently the ferrule may be plunged into cold water.
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6. SERVICE AND GENERAL MAINTENANCE
6.1. PREVENTIVE MAINTENANCE
Once per week the following tasks should be performed:
yCheck gear box lubricant level; top up if required
yCheck for leaks
yGrease any fittings.
6.2. BLEEDING BRAKE SYSTEM
To be performed as required.
Bleed pressure release circuit of the brake by pressurizing, and then cracking the top
port fitting, allowing air to escape. Repeat until all air has been removed.
6.3. GEAR LUBRICATION SCHEDULE
The first gear oil change is to be done after 300 hours of operation. The removed oil
may be used a second time after filtering through a 40 m filter. Do not filter through
Fullers earth or other types of filters that could remove the additives of the
original formulation.
Subsequently, the oil should be replaced every 500 hours of operation or 1 year,
depending on working conditions.
It is recommended to have an oil analysis performed every six months to evaluate the
oil’s condition. Retain analysis statements for warranty records.
When operating continuously at high temperatures and/or in dusty or dirty atmospheres,
oil analyses should be performed frequently as directed by the lubricant manufacturer.
If oil analysis indicates a potential problem, it is recommended that the winch be
disassembled and inspected as follows:
yDisassemble the winch as per the instructions in Disassembly / Assembly Section.
yInspect ALL parts and replace any worn parts.
yAssemble the winch as per instructions in Disassembly / Assembly Section.
yRefill with NEW lubricating oil.
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SERVICE AND GENERAL MAINTENANCE (cont’d)
6.4. MAINTENANCE SCHEDULE
LANTEC recommends the following maintenance be carried out every 12 months or
after 500 hours of actual operation, whichever occurs first:
yDisconnect all hydraulic hoses, wire rope and remove the winch from its base,
taking note of its position and any shims used
yDisassemble the winch per the instructions in Disassembly / Assembly Section
yInspect and replace any worn parts
yAssemble the winch per instructions in Disassembly / Assembly Section
yRefill with NEW Lubricating Oil
yMount the winch on its foundation, making certain to install any shims in their
original position, reconnect hydraulic hoses and wire rope
yFollow start-up instructions in section 5. START-UP PROCEDURE.
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7. DISASSEMBLY / ASSEMBLY
GENERAL PROCEDURE BEFORE STARTING
yA clean work area, with dust and grit free work bench, should be available
yThoroughly clean all parts in a good quality, clean solvent, and air dry
yDiscard all disassembled O-Rings, Oil Seals, Motor Ring Seals, Teflon Seals,
Gasket Seals, and replace with new, well greased parts
ySee Winch Assembly drawing for Seal Kit part number.
7.1. MOTOR ASSEMBLY REMOVAL
yDrain oil from Brake Housing
Part is under spring load
WARNING
!
yUnless the Motor has been diagnosed as requiring service or repair, remove the
Motor complete with Motor Adapter as instructed in the following:
- Unscrew the 6 hex head capscrews, one or two turns at a time in sequence,
until the load on the brake springs is removed.
- Remove capscrews and washers and discard O-Rings.
7.2. DISASSEMBLY OF STANDARD MOTOR
Following removal of Motor, proceed as follows:
NOTE : Be sure that "Index Stamped Numbers" are visible on all sections before
proceeding. Restamp parts, if required, to ensure correct alignment of
parts on assembly.
yRemove the hex head capscrews along with their hardened steel washers from the
motor.
yPry loose and remove the Port End Cover along with the Bearings and Ring Seal,
being careful not to damage the machined surfaces. Leave the Dowel Pins in
whichever part they remain.
yPry loose and remove the Gear Housing. Remove the Drive and Driven Gears. The
Gears must be kept together because they are a "Matched Set".
NOTE : For nonstandard motor consult nearest dealer.
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DISASSEMBLY / ASSEMBLY (cont...)
7.3. ASSEMBLY OF MOTOR
yCheck for any burrs that may have resulted from the disassembly of the motor.
Stone off surfaces with a medium grit carborundum stone.
yInsert new Ring Seal and Bearing into Shaft End Cover. Next install Teflon Seal and
Thrust Plate.
yInsert the Matched Gear Set, making sure they are assembled the same way as
they were disassembled.
yInsert the new greased Gasket Seals into the grooves on both sides of the Gear
Housing.
ySlide the Gear Housing over the Gear Set and tap gently into position with a soft
hammer. Double check "Index Stamped Numbers" for correct alignment.
yInsert new Ring Seal, Bearings, Teflon Seals and Thrust Plate into Port End Cover
and tap lightly into place, using a soft hammer.
yFinally, lubricate the 8 Capscrews and thread them (with hardened washers) into the
Motor Adapter and snug up in diagonally opposite sequence. Rotate the Winch Shaft
with a 6" wrench to make sure there is no binding in the motor.
yAfter the fasteners are tight and you are sure there is no internal binding, torque
diagonally opposite Fasteners to 150-170 lb. ft.
7.4. DISASSEMBLY OF BRAKE
Following removal of the Brake, proceed as follows:
yRemove Sun Gear Shaft complete with Ball Bearing, Brake Hub and Sprag
Assembly.
Three 1/2-13NC tapped holes are provided in the Brake Piston to facilitate easy
removal.
yFriction and Divider Plates and Spacer Ring can now be removed from the Housing.
Be sure to note orientation of Sprag Clutch prior to disassembly. This is determined
by the direction of relative rotation between the Brake Hub and Sun Gear Shaft that
causes either freewheel action or lock-up of the two parts.
yTo remove the Brake Hub, Sprag Clutch Assembly and the two Sprag Bearings from
the Sun Gear Shaft, the Retaining Ring must first be removed. The Ball Bearing can
now be removed if required.
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DISASSEMBLY / ASSEMBLY (cont’d)
7.5. ASSEMBLY OF BRAKE
yInspect the Sun Gear Shaft in the region where the Sprag Clutch runs. If there is
visible signs of wear (max .001"), or indentations, IT MUST BE REPLACED.
Replace Friction Plates and Divider Plates if there are signs of wear.
yReassemble by following the reverse procedure of Disassembly and Removal
7.6. DISASSEMBLY OF GEAR REDUCTIONS
Following the removal of Gear Reductions proceed as follows (see Figure 3below):
yFor Primary and Intermediate Reductions, remove Sun Gears, Thrust Bearing
Washers, and Spacers, as appropriate.
yStraighten Tab(s) on Lockwasher, loosen and remove Locknut and Lockwasher on
three Planet Pins. Lightly tap Planet Pins out of Hub and remove Planet Gears
complete with Bearing Assemblies and Spacers.
yPull Bearings if required. Note which spacers fit between Bearings and which fit
between Hub and Bearing.
Note: Disassembly Procedure is identical for all Gear Reductions.
Figure 3
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