CONTROL GP-PARKING BRAKE 9U2904 - Caterpillar

Illustration 15 g01294202
Filter cart operation on a 430D
During operation, check the filter element indicators on the filter cart. The filter element indicators will indicate the amount of capacity left in the filter element.Note: Occasionally, the filter cart pump will cavitate during start-up. The cavitation is due to air in the suction lines of the pump. When the cavitation continues for more than 1 minute, shut the filter cart OFF and inspect the connections.
Ensure that there are no oil leaks from any of the filter cart connections.Note: Caterpillar recommends that a particle count is to be taken on the oil at the beginning of the filter cycle. The particle count is used as a baseline particle count.
The oil can be particle count tested for cleanliness in one of the two following ways.
Use a portable particle analyzer for immediate results.
Collect a bottle sample and send the sample to an S O S lab. Refer to Contamination Control Guideline, SEBF8482, "Obtaining Oil Sample for Analysis" for more information.Portable Particle Analyzer Procedure
When using a portable particle analyzer for particle counting, be sure to read and understand the Tool Operating Manual before operating.
Illustration 16 g03550135
(18) Hose assembly
(19) Fitting
(20) Quick disconnect coupler
(21) S O S valve
Attach the fabricated particle counter "low pressure in" suction tube to the S O S valve (21) on the filter cart.Note: The fabricated suction tube can be made with the parts listed in Table 3 and as shown in Illustration 16.
Attach the other end of the fabricated suction tube to the "low pressure in" port on the portable particle counter as called for in the Tool Operating Manual.Bottle Sample Procedure
Illustration 17 g03550216
(21) S O S valve
(22) Fluid sampling bottle
If collecting a bottle sample, use the same S O S valve (21) and a 169-8373 Fluid Sampling Bottle (22).
Record an oil sample from the S O S valve (21) on the filter cart at the beginning of the filter cycle.
During the filter cart procedure the engine must be run at LOW idle with the parking brake engaged. Running the engine will circulate the oil in the hydraulic system. Running the engine will also flush the more contaminated oil back into the hydraulic tank.Note: Changing the machine hydraulic oil filters halfway through the filter process avoids opening the housing after the system has been cleaned. If the filter housing is opened after the filtration process is complete, the housing becomes an inlet for contamination. The new filters can remain in place until the next scheduled filter change.
Operate the filter cart until the portable particle analyzer indicates that the oil has reached an ISO level of at least 16/13. The final ISO level should be recorded before the machine is returned to the field.
During the filter cart operation, cycle the lift cylinders at least four times every half an hour during the filter cart operation. Operation of the lift cylinders will cycle the clean tank oil into the hydraulic system and flush the more contaminated oil back into the tank.Note: The filter cart procedure can