5130, 5130B and 5230 Excavators, 784B, 785B, 785C, 789B, 789C, 793B and 793C Off-Highway Truck/Tractors and 992G, 994 and 994D Wheel Loaders Vital Information Management System (VIMS) Caterpillar

Position Sensor (Lift Arm) - Adjust

Usage:

793B 1HL

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Illustration 1	g00540697
Adjusting Rod Ends (A) Dimension. (1) Lift arm bail. (2) Position lever. (3) Position sensor shaft. (4) Nut. (5) Shaft. (6) Locknuts.

Put the lift arms in the fully lowered position on flat level ground. Tilt back the bucket completely. Stop the engine.
Loosen bolt (4) until postiion sensor shaft (3) is able to move freely within position lever (2).
Assemble the adjusting rod to the length of dimension (A) between the pivot centerlines of the rod ends. Refer to illustration 1. The length of the adjusting rod is adjusted by loosening locknuts (6) and turning the rod ends on shaft (5).
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Table 1
Model Dimension "A"

994 149 mm (5.9 inch)

994D 149 mm (5.9 inch)
Connect the adjusting rod to lift arm bail (1) and position lever (2).
Make sure that position lever (2) can rotate freely on position sensor shaft (3).
Put the key start switch in the ON position. Select the parameter for the lift linkage position sensor. Use the VIMS keypad module to enter the number 5-8-4. Then press the gauge key.
Carefully rotate position sensor shaft (3) in the counterclockwise direction with a screwdriver until the sensor is at the physical limit.
Rotate position sensor shaft (3) clockwise with a screwdriver until the message center reads 8 ± 1 degrees. Loosely tighten bolt (4) in position lever (2) in order to hold position sensor shaft (3) in place.

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NOTICE

If the position sensor is extended beyond maximum limits, damage to the sensor will occur.
Check the lift linkage position on the message center. When the message center shows 8 ± 1 degrees the adjustment is correct. Repeat STEP 7 if further adjustments are required. When adjustments are complete tighten bolt (4) in position lever (2).
Start the engine and slowly raise the lift arms. Watch the value of the lift linkage position sensor (STEP 6) that is displayed on the message center while the lift arms are rising. The display reading should not be more than 95 degrees. If the value is greater than 95 degrees verify that the machine is on flat ground. Then repeat STEP 7 with a value that is less than 8 ± 1 degrees and a value that is greater than 5.0 degrees.