VALVE GP-PILOT 2999116 - Caterpillar

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(1) 166-0845 Connection Box The connection box (1) is located on the backside of the control box. Illustration 1 shows the general location of the connection box.Remove Connection Box Face Plate
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(2) Four Phillips head bolts (3) Connection box face plate
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(4) 24V 206-9427 Relay (5) Ground wire
The connection box face plate (3) is secured by four Phillips head bolts (2) shown in Illustration 2. Remove the four bolts with a standard Phillips head screwdriver.
Gently set the face plate down directly below the connection box since the grounding wire (5) is still connected to the face plate and the connection box. Refer to Illustration 3Inspect the Existing Relay
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(6 ) Relay rating marking location
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(7) 12V relay marking
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(8) 24V relay markingInspect the existing relay to determine if the rating is for a 12V or 24V relay. Look for a "12VDC" or a "24VDC" marking. The markings (6) are found on the right side of the relay as installed in the connection box. Refer to Illustration 4 for an example of an installed relay with the markings. Illustration 5 shows the "12VDC" marking (7) and Illustration 6 shows the"24VDC" marking (8) on the relays.Replacing the 12V Relay
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(9) Wires to be disconnected (10) Phillips head bolt
If the marking on the installed relay is "24VDC", the relay is correct and should be left as is. The connection box face plate should be replaced, and the four Phillips head bolts reinstalled and hand tightened.
If the marking on the installed relay is "12VDC", the relay is incorrect and must be removed. Remove the relay by unscrewing the Phillips head bolt (10) on the right side of the relay.
Once the bolt is removed, disconnect the wires (9) that are plugged into the terminals on the left side of the relay. Disconnect the wires, by grabbing the plastic connector at the end of the wire and pull directly away from the relay. The connector will not release from the relay if the harness is pulled only by the wire. Refer to Illustration 7 for the location of the bolt and wires.Reconnecting the 24V 206-9427 Relay
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Top view of relayAll terminal callouts are from the terminal end of the relay (11) Left side terminal (12) Top terminal (13) Metal mounting tab (14) Right side terminal (15) Wire labeled "2" or "45" (16) Wire labeled "B+" (17) Wire labeled "10"
After removing the 12V relay, install the 24V relay into the connection box.
Connect the 24V relay to the previously removed wires. Illustration 8 shows the proper wiring of the 24V relay. The relay in Illustration 8 should be installed in the connection box with the metal mounting tab (13) on the bottom, pointing toward the right. In this orientation, only three of the terminals can be seen. The left side terminal (11) in this orientation should be connected to the wire labeled "10" (17). The top terminal (12) in this orientation should be connected to the wire labeled "B+" (16). The right side