HARNESS AS-SWITCH 3071243 - Caterpillar

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Remove cover (1).
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Clean the surface area around sight gauge (3).
Check the oil level in sight gauge (3). The oil level must be visible within the sight gauge. Add oil, if necessary. Note: Do not overfill the tandem drive housing.
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Fill the tandem drive housing with oil through oil filler cap (4). Refer to the following topics:
Operation and Maintenance Manual, "Lubricant Viscosities"
Operation and Maintenance Manual, "Capacities (Refill)"Note: The Wiggins fluid service system can be used to drain the tandem housings. The Wiggins fluid service system can also be used to fill the tandem housings. Use drain plug (2) for the Wiggins fluid service system.
Repeat Step 1 through Step 4 for the other tandem drive housing.