convertidor 844 testeo
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/09/12 844H Wheel Tractor BTW00001-UP (MACHINE) POWERED BY C27 Engine(SEBP3849 - 28) - Document
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Cerrar SIS
Pantalla anterior
Producto: WHEEL DOZERModelo: 844H WHEEL DOZER BTWConfiguracin: 844H Whee l Tractor BTW00001-UP (MACHINE)POWERED BY C27 Engine
Pruebas y Ajustes990H Wheel Loader and 844HWheel Dozer Power TrainNmero de medio -RENR8811-03 Fecha de publicacin -01/10/2009 Fecha de actualizacin -07/10/2009
i0174563
Torque Converter Lockup Clutch Pressure - Test
SMCS - 3102-081-PX
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/09/12 844H Wheel Tractor BTW00001-UP (MACHINE) POWERED BY C27 Engine(SEBP3849 - 28) - Document
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Illustration 1 g0085806
Hydraulic Sys tem Schematic
(1) Priority valve
(2) Modulating valve (lockup clutch)
(3) Modulating valve (impeller clutch)
(4) Oil filter
(5) Oil pump
(6) Lockup clutch
(7) Magnetic screen
(8) Transmiss ion hydraulic control
(9) Oil cooler
(10) Torque converter
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/09/12 844H Wheel Tractor BTW00001-UP (MACHINE) POWERED BY C27 Engine(SEBP3849 - 28) - Document
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(11) Impeller clutch
(12) Reservoir in output t ransfer gear case
(13) Planetary lubrication
(14) Outlet line from oil cooler to planetary lubrication
(15) Torque converter outlet relief valve
(A) Press ure tap for lockup clutch
(B) Oil pump output pressure tap P1
(C) Torque converter inlet pressure tap P3
(D) Pressure tap for impeller clutch
(F) Lubrication pressure tap
(G) Torque converter outlet pressure tap
Illustration 2 g00855968
Torque Converter
(A) Press ure tap for lockup clutch
(D) Pressure tap for impeller clutch
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/09/12 844H Wheel Tractor BTW00001-UP (MACHINE) POWERED BY C27 Engine(SEBP3849 - 28) - Document
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Illustration 3 g00393020
Transmission
(C) Torque converter inlet pressure tap P3
Illustration 4 g00393021
Torque Converter Cover
(G) Torque converter outlet pressure tap
NOTICE
Care must be taken to ensure that fluids are contained during
performance of inspection, maintenance, testing, adjusting and repair of
the product. Be prepared to collect the fluid with suitable containers
before opening any compartment or disassembling any component
containing fluids.
Refer to Special Publication, NENG2500, "Caterpillar Tools and ShopProducts Guide" for tools and supplies suitable to collect and contain
fluids on Caterpillar products.
Dispose of all fluids according to local regulations and mandates.
Personal in ur or death can result from sudden machine movement.
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/09/12 844H Wheel Tractor BTW00001-UP (MACHINE) POWERED BY C27 Engine(SEBP3849 - 28) - Document
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Sudden movement of the machine can cause injury to persons on or near
the machine.
Prevent possible injury by performing the procedure that follows before
working on the machine.
1. Park the machine on a smooth level surface.
2. Shift the transmission direction control to the NEUTRAL position.
3. Lower the bucket and/or the work tool to the ground. Lower the blade and/or the work tool to the ground.
4. Engage the parking brake.
5. Place blocks in front of the wheels and behind the wheels.
6. Install the steering frame lock.
7. Allow only authorized personnel on the machine. Keep unauthorized personnel off the machine and in clear
sight of the operator.
Note: All tests and all adjustments must be made while the transmission oil is at normal operating temperature.
NOTICE
Do not connect or disconnect hose fittings to or from the quick disconnect
nipples when there is pressure in the system. This will prevent damage to
the seals that are in the fitting.
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/09/12 844H Wheel Tractor BTW00001-UP (MACHINE) POWERED BY C27 Engine(SEBP3849 - 28) - Document
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Illustration 5 g00392679
Outlet Relief Valve
(15) Torque converter outlet relief valve
(16) Spacers
Table 1
Torque Converter Pressure
Pressure PressureTap
Pressure at High Idle Adjustment
Lockup
Clutch(A)
Stabilized pressure with an activated solenoid is
2030 240 kPa (295 35 psi).
Pressure is less than
170 kPa (25 psi) when the solenoid is not activated.
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Torque
Converter
Inlet P3
(C)The maximum pressure with cold oil is
930 kPa (135 psi).-
Impeller
Clutch(D)
The impeller clutch top pressure must be a minimum of
1950 kPa (285 psi).
Pressure with the left brake pedal fully depressed is
220 150 kPa (32 22 psi).
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Torque
Converter
Outlet
(G)
Maximum pressure is
550 kPa (80 psi).
Minimum pressure is
415 kPa (60 psi).
(These pressures are for a machine in third speed, withactivated brakes, with installed axle shafts, and with the
converter in a stall condition.)
Add spacers (16)
or remove spacers
(16).
Table 2
Pressure Change for One Spacer (1)
Description Thickness Pressure Change Part
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/09/12 844H Wheel Tractor BTW00001-UP (MACHINE) POWERED BY C27 Engine(SEBP3849 - 28) - Document
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5M-9622 Spacer
1.60 mm (.063 inch) 31.2 kPa (4.53 psi)
Output Relief Valve (15)5M-9623 Spacer
0.91 mm (.036 inch) 18.2 kPa (2.64 psi)
5M-9624 Spacer
0.25 mm (.010 inch) 5.0 kPa (.73 psi)( 1 ) Before an adjustment is made to outlet relief valve (15), make sure that the valve springs are not weak or broken.
Table 3
Required Tools
Part Number Description Quantity
1U-5481 (1) Pressure Gauge Group 1
1U-5482 Pressure Adapter Group 1
4C-8195 Control Service Tool 1
7X-1701 Communication Adapter 1
( 1 ) The 198-4240 Press ure Indicator Tool Gp is also available.
Lockup Clutch Disengaged (Minimum clutch pressure)
The drive shaft rotates between the torque converter and the transmission
whenever the engine is running. Contact with the rotating shaft can result
in personal injury or death.
The rotating shaft is located under the implement and steering pumps. Do
not allow personnel into the pump bay area behind the cab when the
engine is running.
Personal injury or death can result from sudden machine movement.
Sudden movement of the machine can cause injury to persons on or near
the machine.
To prevent injury or death, make sure that the area around the machine is
clear of personnel and obstructions before moving the machine to perform
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/09/12 844H Wheel Tractor BTW00001-UP (MACHINE) POWERED BY C27 Engine(SEBP3849 - 28) - Document
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the test that follows.
1. Install a hose and a 4130 kPa (600 psi) pressure gauge on pressure tap (A) .
2. Engage the parking brake and shift the transmission to the NEUTRAL position. Start the engine and run the
engine at high idle.
3. Observe the pressure gauge. The pressure reading on the gauge must be 170 kPa (25 psi) or less.
Lockup Clutch Engaged (Maximum stabilized pressure)
The drive shaft rotates between the torque converter and the transmission
whenever the engine is running. Contact with the rotating shaft can result
in personal injury or death.
The rotating shaft is located under the implement and steering pumps. Do
not allow personnel into the pump bay area behind the cab when the
engine is running.
Personal injury or death can result from sudden machine movement.
Sudden movement of the machine can cause injury to persons on or nearthe machine.
To prevent injury or death, make sure that the area around the machine is
clear of personnel and obstructions before moving the machine to perform
the test that follows.
1. Install a hose and a 4130 kPa (600 psi) pressure gauge on pressure tap (A) .
2. Move the on/off switch for the lockup clutch to the ON position.
3. Engage the parking brake and place the transmission in the NEUTRAL position. Start the engine.
4. Apply the service brakes and release the parking brake. Shift the machine into the FIRST SPEED
FORWARD position.
5. Operate the machine at maximum speed and observe the pressure reading on the gauge. Make sure that the
left service brake pedal or the right service brake pedal are not depressed. If the left service brake pedal or
the right service brake pedal are depressed the lockup clutch will not engage. The maximum stabilized
pressure must be 2030 240 kPa (295 35 psi).
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/09/12 844H Wheel Tractor BTW00001-UP (MACHINE) POWERED BY C27 Engine(SEBP3849 - 28) - Document
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Copyright 1993 - 2012 Caterpillar Inc.Todos los derechos reservados.Red privada para licenciados del SIS.
Mon Sep 24 2012 20:39:02 GMT-0400 (Hora est. Sudam rica Pacfico)