FLYWHEEL AS 4N4447 - Caterpillar

Sudden movement or accidental starting of the machine can cause personal injury or death to persons on or near the machine.To prevent personal injury or death, perform the following:Park the machine on a smooth, level surface.Lower the work tool to the ground and engage the parking brake.Stop the engine and remove the key.Block the wheels and install the steering frame lock.
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, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products.Dispose of all fluids according to local regulations and mandates.
Specifications
Table 1
Hydrostatic Transmission (Gearbox) Pressures
Main Relief 2200 140 kPa (319 20 psi)
Clutch 2100 140 kPa (305 20 psi)
Lube 160 110 kPa (23 16 psi) Introduction
The following test procedure will verify whether the pressure settings for the hydrostatic transmission (gearbox) are within the specified limit.Required Tools
Illustration 1 g02571852
Tooling (A) 198-4240 Digital Pressure Indicator Gp
Table 2
Required Tools
Tool Item Qty Part No Description
A 198-4240 Digital Pressure Indicator Gp
A1 1 198-4234 Digital Indicator
A2 1 198-4237 Pressure Sensor Gp
(0 TO 3,445-KPA (0 TO 500-PSI))
A3 1 198-4236 Adapter Cable As Machine Preparation
Move the machine to a smooth, horizontal location that is away from operating machines and away from personnel.
Place the transmission direction in the NEUTRAL position.
Engage the parking brake. Place wheel blocks in front of the wheels and behind the wheels.
Lower the bucket or the work tool to the ground.
Stop the engine.
Illustration 2 g02703117
Install the steering frame lock.
Relieve the pressure in the hydraulic system. Reference: For more information about relieving the hydraulic pressure, refer to the Service Manual module Testing and Adjusting, "System Pressure - Release" for the machine that is being serviced.Reference: For more information about preparing the machine for Testing and Adjusting, refer to the Service Manual module Testing and Adjusting, "Machine Preparation for Testing and Adjusting" for the machine that is being serviced.Test Procedure
Permit only one operator on the machine. Keep all other personnel away from the machine or in sight of the operator.
Relieve the pressure in the hydraulic system. Reference: For more information about relieving the hydraulic pressure, refer to the Service Manual module Testing and Adjusting, "System Pressure - Release" for the machine that is being serviced.
Illustration 3 g02833621
(1) Transmission (gearbox)
(2) Main relief test port
(3) Lube test port
(4) Clutch test port
Gain access to the transmission (gearbox) (1) located below the cab near the front drive shaft output on the left side of the machine. Install tooling (A) on test port (2) to check main relief pressure.
Start the engine and warm the hydraulic oil to at least 40° C (104° F).
Run the engine at high idle.
Record the pressure obtained on tooling (A). Refer to Table 1 for pressures obtained.
Reduce the engine speed to low