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SPROCKET, SPEED SENSOR B138755 - Caterpillar

B138755 SPROCKET, SPEED SENSOR Caterpillar parts CB-414 SPROCKET
Alternative (cross code) number:
Caterpillar B138755 SPROCKET, SPEED SENSOR

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Compatible equipment models: B138755:

Number on catalog scheme: 4
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Illustration 26 g03354452
(1) Cover As
(3) Hole location
Cut a 63.50 mm (2.5 inch) hole (3) in the center of the Cover As (1). Refer to Illustration 26.
Insert the 37° angle of the 7X-7678 Connector into the hole (3) cut in the Cover As (1). Weld the connector to the Cover As (1).
Install a 228-7097 O-Ring Seal onto the connector over the threads down to the hex nut portion of the connector to create a seal between the connector and the fill cap adapter.
Install the Cover As (1) on to the hydraulic tank.
Illustration 27 g03354816
(X) Proper length of suction hose
(Y) Distance from the top of the filler neck to the bottom of the tank
(Z) 2 inch filler cap adapter = 50.8 mm
(Z) 4 inch filler cap adapter = 101.6 mm
Measure the distance from the top of the hydraulic filler neck to the bottom of the hydraulic tank (Y). Subtract (Z) from (Y) to obtain the proper hose length (X). Refer to Illustration 27.
Cut a length of 122-6906 Hydraulic Suction Hose (844) that matches (X) measured distance of tank depth. Install the hose on the filler cap adapter hose barb.
Illustration 28 g03354821
(4) Filler cap adapter
Install the 193-5900 Filler Cap Adapter (4) on to the 7X-7678 Connector. Be sure that the installed suction hose reaches within 25.4 mm (1 inch) of the bottom of the hydraulic tank. Refer to Illustration 28.
Illustration 29 g03354873
(5) Side return port with elbow fitting
Note: The elbow fitting (5) may be required on larger tractors for the filter cart suction hose to reach and connect to the filler cap adapter. The addition of the elbow fitting will aid in the necessary orientation of the return port. The elbow fitting (5) is pictured in Illustration 29 on the side report port.
Illustration 30 g03354879
(6) Suction port with elbow fitting
(7) Filler cap adapter center suction port
(8) Filter cart suction hose
Connect the filter cart suction hose (8) to the Fill Cap Adapter center suction port (7). Refer to Illustration 30.
Illustration 31 g03354882
(9) Return line
(10) Fill Cap Adapter side return port
Connect the filter cart discharge hose (9) to the Fill Cap Adapter side return port (10). Refer to Illustration 31.Note: Refer to Step 19 of the Filter Cart Procedure for Excavator Hydraulic Oil section in this document for the remaining steps of the filtration procedure.
When the filtration procedure is complete, remove the 193-5900 Filler Cap Adapter and install the 103-6343 Cap.Oil Compartment Filtration Times
If an on-line, portable particle counter-is not available to diagnose and track when the contaminant level has lowered to an acceptable level, refer to the following equation. This equation relates to the 188-3242 Filter Cart Gp and the 194-2897 Filter Cart only. Other filtration units will have different equation references and these units will be noted when appropriate.
Illustration 32 g01177339
Oil compartment filtration equation
(A) Compartment oil capacity (gal)
(B) Pulses per minute
(C) Approximate filtration time (min)Pulses Per Minute Definition
Each air discharge or each stroke of the air operated filter pump delivers one pulse of oil. The internal pump shaft will slide left (one pulse), and then

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