Case 721G Stage IV, Operator'S Manual

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7 - MAINTENANCE
Selective Catalytic Reduction (SCR) in-line filter (Initial) - Cleaning
Clean the in-line supply filter when the machine is new and the hourmeter registers 100 hours. Clean every 500 hours
thereafter or more often if conditions so require. The supply line has a small mesh filter within the line.
Prior operation:
Keep all non-authorized personnel clear of the area. Park the machine on a firm, level surface in neutral with the
parking brake applied. Lower the bucket/attachment to the ground. Turn off the engine. Install the transport/service
link into the locked position.
1. Open the engine compartment. The in-line supply filter
is located on the right-hand side of the machine directly
above the Supply Module.
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2. Use a suitable container to catch any fluid that is dis-
charged during the hose and filter disassembly. Clean
the area before the disassembly. Disconnect the sup-
ply line by squeezing the tabs on the connection and
separate the lines.
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3. Using needle nose pliers, remove the filter using care
not to damage or bend filter. If the fitting does not re-
lease easily, reclean the fitting with compressed air. Di-
rect the compressed air down into the fitting, then squirt
water into the fitting to lubricate the O-ring.
4. Inspect the filter housing and rinse with water. If filter is
damaged, replace the filter.
5. Reinstall the filter into the supply line and reconnect the
lines.
6. Start the engine and run at idle speed. Check for leaks.
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