PLUNGER (Liter Scale) 3Y4907 - Caterpillar

Diesel engine exhaust contains products of combustion which may cause personal injury.Always start and operate the engine in a well ventilated area, and, if in an enclosed area, vent the exhaust to the outside.
Specifications
Table 1
Pump Neutral Specifications
Date Product or Component SN
Component Specification Actual
Reverse switch normal position Open
Lever movement from neutral in reverse direction before switch activation Switch closes 5 2 degrees of lever movement Introduction
This procedure confirms that the reverse switch is operating properly. Perform this test if the backup alarm is not operating, or if the backup alarm continuously operates.Required Tools
Table 2
Required Tools
Tool Item Qty Part No Description
A 1 146-4080 Digital Multimeter Gp
B 1 7x-1710 Multimeter Probe Test Preparation
Drive the machine to a smooth, horizontal surface.
Illustration 1 g03394957
Move propel lever (1) to the NEUTRAL position.
Illustration 2 g03394960
Move parking brake switch (2) to the ON position.
Use throttle decrease switch (3) in order to operate the engine in low idle.
Illustration 3 g03394976
Move engine start switch (4) to the OFF position.
Illustration 4 g03401196
Remove two screws (5) for power ports (6).
Illustration 5 g03401212
Unplug the wires from back of power ports (6). Mark the wires for reconnection.
Illustration 6 g03401219
Remove six screws (7), and remove cover (8).
Illustration 7 g03413151
Unplug reverse switch connector (9) from the machine harness.
Insert black spoon from Tool (B) into pin "4" of the connector. Insert red spoon from Tool (B) into pin "3" of the connector.
Connect Tool (B) to Tool (A). Test Procedure
Make sure propel lever (1) is in the NEUTRAL position.
Set Tool (A) to measure continuity. The circuit across the switch should be open. If the circuit across the switch is closed, replace the propel lever, and retest the switch. If the circuit across the switch is open, go to the next step.
Move propel lever (1) into the reverse range. The circuit across the reverse switch should close when the propel lever is moved 5 2 degrees.
Move propel lever (1) into the NEUTRAL position. If the switch does not operate as described above, replace the propel handle, and retest the reverse switch. If the switch operates as described above, go to the next step.
Remove Tool (B) from reverse switch connector (9).
Plug reverse switch connector (9) into the machine harness.
Position cover (8), and install six screws (7).
Connect wires to power ports (6).
Position power ports (6), and install two screws (5).